STMicroelectronics L78M Datasheet
تبلیغات
تبلیغات
L78M
Datasheet
Precision 500 mA regulators
TO-220
DPAK
Maturity status link
L78M
TO-220FP
IPAK
Features
• Output current to 0.5 A
• Output voltages of 5; 6; 8; 9; 10; 12; 15; 24 V
• Thermal overload protection
• Short circuit protection
• Output transition SOA protection
• Output voltage tolerance: 2 % (AB and AC versions) or 4 % (C version)
• Guaranteed in extended temperature range
Description
The L78M series of three-terminal positive regulators is available in TO-220,
TO-220FP, DPAK and IPAK packages and with several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shutdown and safe area protection, resulting it essentially indestructible. If adequate heat sinking is provided, they can deliver over 0.5 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents.
DS0425 - Rev 24 - September 2020
For further information contact your local STMicroelectronics sales office.
www.st.com
1
Diagram
Figure 1. Block diagram
L78M
Diagram
AMG080320171800MT
DS0425 - Rev 24 page 2/45
2
Pin configuration
Figure 2. Pin connections (top view)
L78M
Pin configuration
AMG080320171801MT
DS0425 - Rev 24 page 3/45
Figure 3. Schematic diagram
L78M
Pin configuration
DS0425 - Rev 24
AMG080320171802MT page 4/45
L78M
Maximum ratings
3
Maximum ratings
Symbol
V
I
I
O
P
D
T
STG
DC input voltage
Storage temperature range
Note:
T
OP
Table 1. Absolute maximum ratings
Parameter
Output current
Power dissipation
Operating junction temperature range for V
O
= 5 to 18 V for V
O
= 20, 24 V for L78MxxAC for L78MxxAB for L78MxxC
Value
35
40
Internally limited
Internally limited
- 65 to 150
0 to 125
-40 to 125
0 to 150
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
Unit
V mA mW
°C
°C
Symbol
R thJC
R thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
Table 2. Thermal data
TO-220
5
50
Figure 4. Application circuit
TO-220FP
5
60
DPAK
8
100
IPAK
8
100
Unit
°C/W
°C/W
AMG080320171803MT
DS0425 - Rev 24 page 5/45
L78M
Test circuits
4
Test circuits
Figure 5. DC parameter
Figure 6. Load regulation
AMG080320171804MT
DS0425 - Rev 24
Figure 7. Ripple rejection
AMG080320171805MT
AMG080320171806MT page 6/45
L78M
Electrical characteristics
5
Electrical characteristics
Refer to the test circuits, T
J
= 25 °C, V
I
= 10 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Table 3. Electrical characteristics of L78M05C
Test conditions Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
∆I d
Load regulation
Quiescent current
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR eN
V d
I sc
Supply voltage rejection
Output noise voltage
Dropout voltage
Short circuit current
I
O
= 5 to 350 mA, V
I
= 7 to 20 V
V
I
= 7 to 25 V, I
O
= 200 mA
V
I
= 8 to 25 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 8 to 25 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 8 to 18 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
V
I
= 35 V
Min.
Typ.
Max.
4.8
4.75
5
5
5.2
5.25
100
50
100
50
6
0.5
0.8
-0.5
62
40
2
300
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA
DS0425 - Rev 24 page 7/45
L78M
Electrical characteristics
Refer to the test circuits, V
I
= 10 V, I
O
°C (AC) unless otherwise specified.
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
I scp
Output noise voltage
Dropout voltage
Short circuit current
Short circuit peak current
Table 4. Electrical characteristics of L78M05A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 7 to 20 V
V
I
= 7 to 25 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 8 to 25 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 8 to 25 V
I
O
= 5 mA
V
I
= 8 to 18 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25°C
B = 10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
T
J
= 25 °C, V
I
= 35 V
T
J
= 25 °C
Min.
Typ.
Max.
4.9
5 5.1
4.8
5 5.2
100
50
100
50
6
0.5
0.8
-0.5
62
40
2
300
700
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA mA
Refer to the test circuits, T
J
= 25 °C, V
I
= 11 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Table 5. Electrical characteristics of L78M06C
Test conditions Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
∆I d
Load regulation
Quiescent current
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR eN
V d
I sc
Supply voltage rejection
Output noise voltage
Dropout voltage
Short circuit current
I
O
= 5 to 350 mA, V
I
= 8 to 21 V
V
I
= 8 to 25 V, I
O
= 200 mA
V
I
= 9 to 25 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 9 to 25 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 9 to 19 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
V
I
= 35 V
Min.
Typ.
Max.
5.75
5.7
6
6
6.25
6.3
100
50
120
60
6
0.5
0.8
-0.5
59
45
2
270
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA
DS0425 - Rev 24 page 8/45
L78M
Electrical characteristics
Refer to the test circuits, V
I
= 11 V, I
°C (AC) unless otherwise specified.
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
DV
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
I scp
Output noise voltage
Dropout voltage
Short circuit current
Short circuit peak current
Table 6. Electrical characteristics of L78M06A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 8 to 21 V
V
I
= 8 to 25 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 9 to 25 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 9 to 25 V
I
O
= 5 mA
V
I
= 9 to 19 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25 °C
B = 10 Hz to 100 kHz
T
J
= 25 °C
T
J
= 25 °C, V
I
= 35 V
T
J
= 25 °C
Min.
Typ.
Max.
5.88
6 6.12
5.75
6 6.3
100
30
120
60
6
0.5
0.8
-0.5
59
45
2
270
700
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA mA
Refer to the test circuits, T
J
= 25 °C, V
I
= 14 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Table 7. Electrical characteristics of L78M08C
Test conditions Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
Output noise voltage
Dropout voltage
Short circuit current
I
O
= 5 to 350 mA, V
I
= 10.5 to 23 V
V
I
= 10.5 to 25 V, I
O
= 200 mA
V
I
= 11 to 25 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 10.5 to 25 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 11.5 to 21.5 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
V
I
= 35 V
Min.
Typ.
Max.
7.7
8 8.3
7.6
8 8.4
100
50
160
80
6
0.5
0.8
-0.5
56
52
2
250
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA
DS0425 - Rev 24 page 9/45
L78M
Electrical characteristics
Refer to the test circuits, V
I
= 14 V, I
O
°C (AC) unless otherwise specified.
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
I scp
Output noise voltage
Dropout voltage
Short circuit current
Short circuit peak current
Table 8. Electrical characteristics of L78M08A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 10.5 to 23 V
V
I
= 10.5 to 25 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 11 to 25 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 10.5 to 25 V
I
O
= 5 mA
V
I
= 11.5 to 21.5 V, f = 120 Hz I
O
= 300 mA, T
J
= 25 °C
B = 10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
T
J
= 25 °C, V
I
= 35 V
T
J
= 25 °C
Min.
Typ.
Max.
Unit
7.84
8 8.16
V
7.7
8 8.3
100
V mV
30
160 mV
80
6 mA
0.5
0.8
mA
56
-0.5
52
2
250
700 mV/°C dB
µV
V mA mA
Refer to the test circuits, T
J
= 25 °C, V
I
= 15 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Table 9. Electrical characteristics of L78M09C
Test conditions Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
∆I d
Load regulation
Quiescent current
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR eN
V d
I sc
Supply voltage rejection
Output noise voltage
Dropout voltage
Short circuit current
I
O
= 5 to 350 mA, V
I
= 11.5 to 24 V
V
I
= 11.5 to 25 V, I
O
= 200 mA
V
I
= 12 to 25 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 11.5 to 25 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 12.5 to 23 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
V
I
= 35 V
Min.
Typ.
Max.
8.65
8.55
9
9
9.35
9.45
100
50
180
90
6
0.5
0.8
-0.5
56
58
2
250
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA
DS0425 - Rev 24 page 10/45
L78M
Electrical characteristics
Refer to the test circuits, V
I
= 15 V, I
°C (AC) unless otherwise specified.
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
I scp
Output noise voltage
Dropout voltage
Short circuit current
Short circuit peak current
Table 10. Electrical characteristics of L78M09A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 11.5 to 24 V
V
I
= 11.5 to 25 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 12 to 25 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 11.5 to 25 V
I
O
= 5 mA
V
I
= 12.5 to 23 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25 °C
B =10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
V
I
= 35 V, T
J
= 25 °C
T
J
= 25 °C
Min.
Typ.
Max.
8.82
9 9.18
8.64
9 9.36
100
30
180
90
6
0.5
0.8
-0.5
56
52
2
250
700
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA mA
Refer to the test circuits, V
I
= 16 V, I
°C (AC) unless otherwise specified.
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
Output noise voltage
Dropout voltage
Table 11. Electrical characteristics of L78M10A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 12.5 to 25 V
V
I
= 12.5 to 30 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 13 to 30 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 12.5 to 30 V
I
O
= 5 mA
V
I
= 13.5 to 24 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25 °C
B =10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
Min.
Typ.
Max.
9.8
10 10.2
9.6
10 10.4
100
30
200
100
6
0.5
0.8
-0.5
56
64
2
Unit
V
V mV mV mA mA mV/°C dB
µV
V
DS0425 - Rev 24 page 11/45
L78M
Electrical characteristics
Symbol
I sc
I scp
Parameter
Short circuit current
Short circuit peak current
V
I
= 35 V, T
J
= 25 °C
T
J
= 25 °C
Test conditions Min.
Typ.
Max.
245
700
Unit mA mA
Refer to the test circuits, T
J
= 25 °C, V
I
= 19 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
Output noise voltage
Dropout voltage
Short circuit current
Table 12. Electrical characteristics of L78M12C
Test conditions
I
O
= 5 to 350 mA, V
I
= 14.5 to 27 V
V
I
= 14.5 to 30 V, I
O
= 200 mA
V
I
= 16 to 30 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 14.5 to 30 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 15 to 25 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
Min.
Typ.
Max.
11.5
12 12.5
11.4
12 12.6
100
50
240
120
6
0.5
0.8
-1
55
75
2
240
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA V
I
= 35 V
Refer to the test circuits, V
I
= 19 V, I
°C (AC) unless otherwise specified.
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection
Table 13. Electrical characteristics of L78M12A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 14.5 to 27 V
V
I
= 14.5 to 30 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 16 to 30 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 14.5 to 30 V
I
O
= 5 mA
V
I
= 15 to 25 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25 °C
Min.
Typ.
Max.
11.75
12 12.25
11.5
12 12.5
100
30
240
120
6
0.5
0.8
-1
55
Unit
V
V mV mV mA mA mV/°C dB
DS0425 - Rev 24 page 12/45
L78M
Electrical characteristics
Symbol eN
V d
I sc
I scp
Parameter
Output noise voltage
Dropout voltage
Short circuit current
Short circuit peak current
Test conditions
B = 10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
V
I
= 35 V, T
J
= 25 °C
T
J
= 25 °C
Min.
Typ.
Max.
75
2
240
700
Unit
µV
V mA mA
Refer to the test circuits, T
J
= 25 °C, V
I
= 23 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
∆I d
Load regulation
Quiescent current
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
Output noise voltage
Dropout voltage
Short circuit current
Table 14. Electrical characteristics of L78M15C
Test conditions
I
O
= 5 to 350 mA, V
I
= 17.5 to 30 V
V
I
= 17.5 to 30 V, I
O
= 200 mA
V
I
= 20 to 30 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 17.5 to 30 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 18.5 to 28.5 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
Min.
14.4
14.25
Typ.
Max.
15 15.6
15 15.75
100
50
300
150
6
0.5
0.8
-1
54
90
2
240
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA V
I
= 35 V
Refer to the test circuits, V
I
= 23 V, I
°C (AC) unless otherwise specified.
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
∆I d
Load regulation
Quiescent current
Quiescent current change
Table 15. Electrical characteristics of L78M15A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 17.5 to 30 V
V
I
= 17.5 to 30 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 20 to 30 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 17.5 to 30 V
Min.
Typ.
Max.
Unit
14.7
15 15.3
14.4
15 15.6
100
V
V mV
30
300 mV
150
6 mA
0.5
0.8
mA
DS0425 - Rev 24 page 13/45
L78M
Electrical characteristics
Symbol Parameter
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection eN
V d
I sc
I scp
Output noise voltage
Dropout voltage
Short circuit current
Short circuit peak current
Test conditions
I
O
= 5 mA
V
I
= 18.5 to 28.5 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25 °C
B =10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
V
I
= 35 V, T
J
= 25 °C
T
J
= 25 °C
Min.
Typ.
Max.
Unit
-1 mV/°C
54 dB
90
2
240
700
µV
V mA mA
Refer to the test circuits, T
J
= 25 °C, V
I
= 33 V, I
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF unless otherwise specified.
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR eN
V d
I sc
Supply voltage rejection
Output noise voltage
Dropout voltage
Short circuit current
Table 16. Electrical characteristics of L78M24C
Test conditions
I
O
= 5 to 350 mA, V
I
= 27 to 38 V
V
I
= 27 to 38 V, I
O
= 200 mA
V
I
= 28 to 38 V, I
O
= 200 mA
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 27 to 38 V
I
O
= 5 mA, T
J
= 0 to 125 °C
V
I
= 28 to 38 V, f = 120 Hz, I
O
= 300 mA
B = 10 Hz to 100 kHz
Min.
Typ.
Max.
23
22.8
24
24
25
25.2
100
50
480
240
6
0.5
0.8
-1.2
50
170
2
240
Unit
V
V mV mV mA mA mV/°C dB
µV
V mA V
I
= 35 V
Refer to the test circuits, V
I
= 33 V, I
°C (AC) unless otherwise specified.
O
= 350 mA, C
I
= 0.33 µF, C
O
= 0.1 µF, T
J
= -40 to 125 °C (AB), T
J
= 0 to 125
Symbol
V
O
V
O
Parameter
Output voltage
Output voltage
∆V
O
Line regulation
∆V
O
I d
Load regulation
Quiescent current
Table 17. Electrical characteristics of L78M24A
Test conditions
T
J
= 25 °C
I
O
= 5 to 350 mA, V
I
= 27 to 38 V
V
I
= 27 to 38 V, I
O
= 200 mA, T
J
= 25 °C
V
I
= 28 to 38 V, I
O
= 200 mA, T
J
= 25 °C
I
O
= 5 to 500 mA, T
J
= 25 °C
I
O
= 5 to 200 mA, T
J
= 25 °C
T
J
= 25 °C
Min.
Typ.
Max.
23.5
24 24.5
23 24 25
100
30
480
240
6
Unit
V
V mV mV mA
DS0425 - Rev 24 page 14/45
Symbol Parameter
∆I d
Quiescent current change
∆V
O
/∆T Output voltage drift
SVR Supply voltage rejection
Output noise voltage eN
V d
I sc
I scp
Dropout voltage
Short circuit current
Short circuit peak current
Test conditions
I
O
= 5 to 350 mA
I
O
= 200 mA, V
I
= 27 to 38 V
I
O
= 5 mA
V
I
= 28 to 38 V, f = 120 Hz, I
O
= 300 mA, T
J
= 25 °C
B =10 Hz to 100 kHz, T
J
= 25 °C
T
J
= 25 °C
V
I
= 35 V, T
J
= 25 °C
T
J
= 25 °C
L78M
Electrical characteristics
Min.
Typ.
Max.
0.5
0.8
-1.2
50
170
2
240
700
Unit mA mV/°C dB
µV
V mA mA
DS0425 - Rev 24 page 15/45
6
Typical performance
Figure 8. Dropout voltage vs junction temp.
L78M
Typical performance
Figure 9. Dropout characteristics
AMG080320171819MT AMG080320171820MT
Figure 10. Peak output current vs input-output differential voltage
Figure 11. Output voltage vs junction temperature
AMG080320171822MT
AMG080320171821MT
DS0425 - Rev 24 page 16/45
L78M
Typical performance
Figure 12. Supply voltage rejection vs frequency Figure 13. Quiescent current vs junction temperature
AMG080320171823MT
Figure 14. Load transient response
AMG080320171824MT
Figure 15. Line transient response
DS0425 - Rev 24
AMG080320171825MT
Figure 16. Quiescent current vs input voltage
AMG080320171826MT
AMG080320171827MT page 17/45
7
7.1
L78M
Applications information
Applications information
Design considerations
The L78M series of fixed voltage regulators are designed with thermal overload protection that shuts down the circuit when subjected to an excessive power overload condition, internal short-circuit protection that limits the maximum current the circuit will pass, and output transistor safe-area compensation that reduces the output shortcircuit as the voltage across the pass transistor is increased. In many low current applications, compensation capacitors are not required. However, it is recommended that the regulator input be bypassed with a capacitor if the regulator is connected to the power supply filter with long wire lengths, or if the output load capacitance is large. An input bypass capacitor should be selected to provide good high-frequency characteristics to insure stable operation under all load conditions. A 0.33 µF or larger tantalum, mylar, or other capacitor having low internal impedance at high frequencies should be chosen. The bypass capacitor should be mounted with the shortest possible leads directly across the regulators input terminals. Normally good construction techniques should be used to minimize ground loops and lead resistance drops since the regulator has no external sense lead.
Figure 17. Fixed output regulator
Note:
AMG080320171807MT
Although no output capacitor is need for stability, C o
improve transient response if present. C regulator is located an appreciable distance from power supply filter.
I
is required if
Figure 18. Constant current regulator
I
O
= V
XX
/R
1
+I d
AMG080320171808MT
DS0425 - Rev 24 page 18/45
Figure 19. Circuit for increasing output voltage
L78M
Design considerations
I
R1
≥ 5 I d
V
O
= V
XX
(1+R
2
/R
1
)+I d
R
2
Figure 20. Adjustable output regulator (7 to 30 V)
AMG080320171809MT
DS0425 - Rev 24
V
O
=V
XX
R
4
/R
1
Figure 21. 0.5 to 10 V regulator
AMG080320171811MT
AMG080320171812MT page 19/45
DS0425 - Rev 24
Figure 22. High current voltage regulator
R
1
= ______________
I
REQ
-(I
Q1
/b
Q1
)
I
O
= I
REG
+ Q
1
(I
REG
V
____ _)
R
1
Figure 23. High output current with short circuit protection
R
SC
=V
BEQ2
/I
SC
L78M
Design considerations
AMG080320171828MT
Figure 24. Tracking voltage regulator
AMG080320171814MT page 20/45
L78M
Design considerations
Figure 25. High input voltage circuit
V
IN
= V
I
- (V
Z
+ V
BE
)
Figure 26. Reducing power dissipation with dropping resistor
AMG080320171815MT
V
R = __ ___
-V -V
____ ___ ____ ____
I
O(max)
+I d(max)
Figure 27. Power AM modulator (unity voltage gain, I
O
≤ 0.5)
AMG080320171816MT
AMG080320171817MT
Note: The circuit performs well up to 100 kHz.
DS0425 - Rev 24 page 21/45
Figure 28. Adjustable output voltage with temperature compensation
L78M
Design considerations
V
O
= V
XX
(1+R
2
/R
1
) + V
BE
Note:
AMG080320171818MT
Q
2
is connected as a diode in order to compensate the variation of the Q
1
V
BE
with the temperature. C allows a slow rise time of the V
O
.
DS0425 - Rev 24 page 22/45
8
8.1
L78M
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com
. ECOPACK is an ST trademark.
TO-220 (single gauge) package information
Figure 29. TO-220 (single gauge) package outline
DS0425 - Rev 24
8174627_5 page 23/45
DS0425 - Rev 24
L78M
TO-220 (single gauge) package information
Dim.
e1
F
H1
J1
L
L1
L20
L30
∅ P
Q b1 c
D
A b
E e
Table 18. TO-220 (single gauge) mechanical data mm
Typ.
10.00
2.40
4.95
0.51
6.20
Min.
4.40
0.61
1.14
0.48
15.25
2.40
13.00
3.50
16.40
28.90
3.75
2.65
10.40
2.70
5.15
0.60
6.60
Max.
4.60
0.88
1.70
0.70
15.75
2.72
14.00
3.93
3.85
2.95
page 24/45
8.2
L78M
TO-220 (dual gauge) package information
TO-220 (dual gauge) package information
Figure 30. TO-220 (dual gauge) package outline
DS0425 - Rev 24
0015988_21_Type A page 25/45
DS0425 - Rev 24
Dim.
E e e1
F
H1
J1
L
L1
L20
L30
∅ P
Q b1 c
A b
D
D1
L78M
TO-220 (dual gauge) package information
Table 19. TO-220 (dual gauge) mechanical data mm
Typ.
Min.
4.40
0.61
1.14
0.48
15.25
1.27
10
2.40
4.95
1.23
6.20
2.40
13
3.50
16.40
28.90
3.75
2.65
3.85
2.95
10.40
2.70
5.15
1.32
6.60
2.72
14
3.93
Max.
4.60
0.88
1.70
0.70
15.75
page 26/45
8.3
TO-220FP type A package information
Figure 31. TO-220FP package outline
L78M
TO-220FP type A package information
DS0425 - Rev 24
7012510_type_A page 27/45
DS0425 - Rev 24
Dim.
F2
G
G1
H
L2
L3
L4
L5
L6
L7
Dia
D
E
A
B
F
F1
L78M
TO-220FP type A package information
Table 20. TO-220FP package mechanical data mm
Typ.
Min.
4.4
2.5
2.5
0.45
0.75
1.15
1.15
4.95
2.4
10
16
28.6
9.8
2.9
15.9
9
3
Max.
4.6
2.7
2.75
0.7
1
1.70
1.70
5.2
2.7
10.4
30.6
10.6
3.6
16.4
9.3
3.2
page 28/45
8.4
L78M
DPAK (TO-252) package information
Dim.
L1
L2
L4
R
V2
E1 e e1
H
L c c2
D
D1
E
A
A1
A2 b b4
DPAK (TO-252) package information
Table 21. DPAK (TO-252) mechanical data (type A) mm
Typ.
Min.
4.60
2.159
4.445
9.35
1.00
2.60
0.65
0.60
0.45
0.48
6.00
4.95
6.40
2.20
0.90
0.03
0.64
5.20
5.10
4.70
2.286
4.572
2.80
0.80
0.20
0°
Max.
4.80
2.143
4.699
10.10
1.50
3.00
0.95
1.00
0.60
0.60
6.20
5.25
6.60
2.40
1.10
0.23
0.90
5.40
8°
DS0425 - Rev 24 page 29/45
Figure 32. DPAK (TO-252) package outline A
L78M
DPAK (TO-252) package information
DS0425 - Rev 24 page 30/45
DS0425 - Rev 24
Dim.
D
D1
E
E1 e e1
H
L
L1
L2
L4
A
A2 b b4 c c2
L78M
DPAK (TO-252) package information
Table 22. DPAK(TO-252) mechanical data (type E)
Min.
2.18
mm
Typ.
5.97
5.21
6.35
4.32
0.65
4.95
0.46
0.46
2.286
4.572
9.94
1.50
0.89
2.74
Max.
2.39
0.13
0.884
5.46
0.61
0.60
6.22
6.73
10.34
1.78
1.27
1.02
page 31/45
Figure 33. DPAK (TO-252) package outline E
L78M
DPAK (TO-252) package information
DS0425 - Rev 24 page 32/45
DS0425 - Rev 24
Dim.
L2
L3
L4
L5
L6
Θ
Θ1
Θ2
E1 e
H
L
L1 b3 c c1 c2
D
D1
E
A
A1
A2 b b1 b2
L78M
DPAK (TO-252) package information
0.77
0.76
0.77
5.23
0.47
Min.
2.20
0.90
0.00
0.46
0.47
6.00
5.25
6.50
4.70
Table 23. DPAK (TO-252) mechanical data type I
9.80
1.40
0.90
0.60
0.90
0°
3°
1°
-
-
0.81
mm
Typ.
2.30
1.01
5.33
-
0.51
-
6.10
5.40
6.60
4.85
2.286 BSC
10.10
1.50
2.90 REF
-
5°
3°
-
0.51 BSC
0.80
-
1.80 BSC
1.25
1.00
1.50
8°
7°
5°
0.89
0.86
1.10
5.43
0.60
Max.
2.38
1.10
0.10
0.56
0.60
6.20
5.60
6.70
5.00
10.40
1.70
page 33/45
Figure 34. DPAK (TO-252) package outline I
L78M
DPAK (TO-252) package information
DS0425 - Rev 24
C
D
E
A
B
F
G
Table 24. DPAK footprint data
Values mm.
6.70
6.70
1.80
3.00
1.60
2.30
2.30
inch.
0.264
0.64
0.070
0.118
0.063
0.091
0.091
page 34/45
A
L78M
DPAK (TO-252) package information
Figure 35. DPAK footprint recommended data
B C D E
F
G
DS0425 - Rev 24 page 35/45
8.5
DPAK packing information
Figure 36. DPAK tape
L78M
DPAK packing information
DS0425 - Rev 24 page 36/45
DS0425 - Rev 24
L78M
DPAK packing information
Dim.
D1
E
F
K0
P0
A0
B0
B1
D
P1
P2
R
T
W
Figure 37. DPAK reel
A
REEL DIMENSIONS
D
B
40mm min.
Acce s s hole
At s lot loca tion
C
T
N
Full ra dius Ta pe s lot in core for ta pe s ta rt 25 mm min.
width
G me a s ure d a t hub
AM08851v2
Tape
Table 25. DPAK tape and reel mechanical data
Reel mm
Min.
6.8
10.4
2.55
3.9
7.9
1.9
40
0.25
15.7
1.5
1.5
1.65
7.4
1.85
7.6
2.75
4.1
8.1
2.1
Max.
7
10.6
12.1
1.6
0.35
16.3
Dim.
C
D
A
B
G
N
T
Base qty.
Bulk qty.
Min.
1.5
12.8
20.2
16.4
50 mm
Max.
330
13.2
18.4
22.4
2500
2500 page 37/45
8.6
IPAK package information
Figure 38. IPAK package outline
L78M
IPAK package information
DS0425 - Rev 24
0068771_K page 38/45
DS0425 - Rev 24
Dim.
D
E e c c2 e1
H
L
L1
L2
V1
A
A1 b b2 b4
B5
5.20
0.45
0.48
6.00
6.40
4.40
9.00
0.80
Min.
2.20
0.90
0.64
Table 26. IPAK mechanical data mm
Typ.
0.30
2.28
16.10
0.80
10°
L78M
IPAK package information
0.60
0.60
6.20
6.60
4.60
Max.
2.40
1.10
0.90
0.95
5.40
9.40
1.20
1.00
page 39/45
9
L78M
Ordering information
Ordering information
Table 27. Order code
Order codes
TO-220 (single gauge) TO-220 (dual gauge) TO-220FP
L78M05ABV L78M05ABV-DG
L78M05CV
L78M08CV
L78M09CV
L78M12CV
L78M15ABV
L78M15CV
L78M24CV
L78M05CV-DG
L78M08CV-DG
L78M09CV-DG
L78M12CV-DG
L78M15ABV-DG
L78M15CV-DG
L78M24CV-DG
DPAK
L78M05ABDT-TR
L78M05ACDT-TR
L78M05CP L78M05CDT-TR
L78M06ABDT-TR
L78M06CDT-TR
L78M08ABDT-TR
L78M08CDT-TR
L78M09ABDT-TR
L78M09CDT-TR
L78M10ABDT-TR
L78M12ABDT-TR
L78M12ACDT-TR
L78M12CDT-TR
L78M15ABDT-TR
L78M15CDT-TR
L78M24ABDT-TR
L78M24ACDT-TR
L78M24CDT-TR
IPAK
L78M05CDT-1
Output voltages
5 V
10 V
12 V
12 V
12 V
15 V
15 V
24 V
24 V
24 V
5 V
6 V
6 V
8 V
8 V
9 V
9 V
DS0425 - Rev 24 page 40/45
L78M
Revision history
Date
21-Jun-2004
30-Aug-2006
29-Nov-2006
06-Jun-2007
10-Dec-2007
19-Feb-2008
15-Jul-2008
07-Apr-2009
14-Jun-2010
11-Nov-2010
08-Feb-2012
09-Mar-2012
15-May-2012
19-Apr-2013
04-Jun-2014
21-Mar-2017
12-Jun-2019
26-Nov-2019
07-Sep-2020
23
24
21
22
15
16
17
18
19
Revision
6
7
8
9
10
11
12
13
14
20
Table 28. Document revision history
Changes
Document updating.
Order codes updated.
DPAK mechanical data updated and add footprint data.
Order codes updated.
Added Table 25.
Modified: Table 25 on page 44.
Modified: Table 25 on page 44 and Table 26 on page 45.
Modified: Figure 9 on page 22 and Figure 15 on page 23.
Added: Table 18 on page 26, Figure 29 on page 27, Figure 30 on page 28, Figure 31 and
Figure 32 on page 29.
Modified: R thJC
value for TO-220 Table 2 on page 5.
Added: order codes L78M05CV-DG, L78M12CV-DG and L78M15CV-DG Table 25 on page 44.
Added: order codes L78M08CV-DG and L78M09CV-DG Table 25 on page 44.
Added: order codes L78M24CV-DG Table 25 on page 44.
Removed: Available on request footnote 2 Table 25 on page 44.
Part numbers L78MxxAB, L78MxxAC and L78MxxC changed to
L78M.
Updated the title and the features in cover page.
Canceled Table 1.Device summary.
Updated Section 3: Maximum ratings, Section 5: Electrical characteristics, Section 6:
Typical performance and Section 8: Package mechanical data.
Added Section 7: Applications information and Section 9: Packaging mechanical data.
Minor text changes.
Updated Section 8: "Package information" (DPAK package information changed from type
F to type I).
Minor text changes.
Updated Section 8.4 DPAK (TO-252) package information.
Added Table 21. DPAK (TO-252) mechanical data (type A), Table 22. DPAK(TO-252) mechanical data (type E) and Table 23. DPAK (TO-252) mechanical data type I
Updated Figure 34. DPAK (TO-252) package outline I.
Updated Table 21. DPAK (TO-252) mechanical data (type A) .
DS0425 - Rev 24 page 41/45
L78M
Contents
Contents
DS0425 - Rev 24 page 42/45
L78M
List of tables
List of tables
DS0425 - Rev 24 page 43/45
L78M
List of figures
List of figures
Figure 27. Power AM modulator (unity voltage gain, I
≤ 0.5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DS0425 - Rev 24 page 44/45
L78M
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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DS0425 - Rev 24 page 45/45
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