STODD03
Monolithic 2-channel power management for high-definition ODD with integrated power switch
Features
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1.2 MHz DC-DC current mode PWM converter
Input voltage from 4 V up to 6 V
Step-down 3.3 V fixed output voltage, up to 700 mA load
Step-up output current up to 500 mA
2% step-down output voltage tolerance
3% step-up output voltage tolerance
Synchronous rectification
Step-down power-save mode at light load
Typical efficiency: 90%
Internal soft-start
Enable functions
True cutoff function for step-up converter
Integrated motor control power switch
Uses tiny capacitors and inductors
Available in QFN16 (4 x 4 mm)
Description
The STODD03 is a 2-channel power management device intended for Blu-Ray applications based on high density optical storage devices. It integrates one step-down converter able to provide 3.3 V fixed output voltage up to
700 mA load, and one step-up converter to provide the power supply needed for the blue laser in applications where only 5 V input voltage is available. The step-up output voltage is adjustable in the range from 6.5 V to 14 V, with current capability up to 500 mA. Both step-down and step-up channels integrate low R
DS_ON
Nchannel and P-channel MOSFETs, allowing high
DC-DC efficiencies. The enable function with true
Table 1.
Device summary
Part number Order code
STODD03 STODD03PQR shutdown makes the step-up section particularly suitable for optical storage power management applications. Moreover, the STODD03 has a 1 A integrated power switch for motor control power supply. The high switching frequency allows the use of tiny SMD components. Low output ripple voltage is achieved thanks to the current mode
PWM topology. The device includes soft-start control, thermal shutdown, and peak current limit to prevent damage due to accidental overload.
The STODD03 is packaged in a QFN16 (4 x 4 mm).
Marking
ODD03
QFN16L (4 x 4 mm)
Package
QFN16 (4 x 4 mm)
August 2011 Doc ID 018980 Rev 1 1/16
www.st.com
16
5
6
7
3
4
1
2
Contents
Contents
STODD03
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 Doc ID 018980 Rev 1
STODD03
Figure 1.
Block diagram
EN1 15
Step-up control block
V
IN_A
3
V
IN_P
7
EN2
4
SW1
14
Step Up
Step Down
VIN_PSW
6
EN
SW
13
EN
SW
16
Power Switch
Control block
Power Switch
1,9,11
GND
12
Out1
2
FB1
8 SW2
10
FB2
5 PSW
OUT
AM09305v1
Block diagram
Doc ID 018980 Rev 1 3/16
Absolute maximum ratings
2 Absolute maximum ratings
STODD03
Table 2.
Symbol
Absolute maximum ratings
Parameter
V
IN_P
Power supply input voltage
VIN_PSW Power switch input voltage
Analog supply input voltage V
IN_A
EN
XX
SW1
All enable pins voltage
Ch1 input switching pin
SW2
PSW
OUT
I
SW
OUT
1
FB
1
FB
2
T
STG
T
OP
Ch2 output switching pin
Power switch output pin
Power switch max output current
Ch1 output voltage pin
Ch1 feedback voltage pin
Ch2 feedback voltage pin
Storage temperature range
Operating junction temperature range
Value
-0.3 to 7
-0.3 to 7
-0.3 to 7
-0.3 to V
IN_A
-0.3 to 16
-0.3 to 7
-0.3 to 7
1.2
-0.3 to 16
-0.3 to 2.5
-0.3 to 5
-50 to 150
-25 to 125
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied. All values are referred to gnd.
Table 3.
Symbol
Thermal data
R thJC
R thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
Value
2.5
46
Unit
°C/W
°C/W
Unit
A
V
V
V
°C
°C
V
V
V
V
V
V
V
4/16 Doc ID 018980 Rev 1
STODD03
Figure 2.
Pin connections (top view)
Pin configuration
9
10
11
12
13
14
6
7
8
Table 4.
Pin number
1
2
3
4
5
15
16 epad
Pin description
Symbol Function
GND_P1 Power ground pin (ch1)
FB1
V
IN_A
EN2
Step-up feedback pin (ch1)
Power supply for internal analog circuits
PSW
OUT
Step-down enable pin. Connect to V
IN_A
if not used.
Power switch output pin. PSW
OUT
output current is not internally limited. Do not exceed 1 A max.
VIN_PSW Power switch input
V
IN_P
SW2
Power input voltage
Step-down switching pin (ch2)
GND_P2 Power ground (ch2)
FB2 Step-down feedback (ch2)
GND_A
OUT1
EN-SW
SW1
Analog ground pin
Step-up output voltage
Power switch enable pin active high (see
Step-up switching pin (ch1)
Table 5
)
EN1
EN-SW
Epad
Step-up enable pin. Step-up is enabled if EN1 > 1.2 V and EN-SW is set low (see
also
Table 6: Step-up EN1 and EN-SW truth table
). When the step-up is disabled, no
current will flow to the load thanks to the true-shutdown function.
Power switch Enable pin active low (see
Table 5
)
Exposed pad to be connected to a suitable gnd layer area, through vias, for thermal heat dissipation.
Doc ID 018980 Rev 1 5/16
Pin configuration
Table 5.
Power switch truth table
EN-SW
H
L
L
H
EN-SW
H
L
H
L
Table 6.
Step-up EN1 and EN-SW truth table
EN-SW EN1
x x x x
H
L
L
H
EN-SW
H
H
L
L
Power switch status
Open
Open
Open
Close
STODD03
Step-up output status
OFF
OFF
OFF
ON
6/16 Doc ID 018980 Rev 1
STODD03 Typical application
Figure 3.
Application circuit
C1
V
IN
5 V
L1
SW1
14
C3
C2
EN1
15
Step-up control block
Step Up
V
IN_A
3
V
IN_P
7
EN2
4
V
IN_PSW
6
EN
SW
13
EN
SW 16
Step Down
Power Switch
Power Switch
Control block
GND
1,9,11
12
Out1
2
FB1
R1
8
SW2
L2
10
FB2
R2
5
PSW
OUT
V
OUT1
6.5 V – 14 V
C4
V
OUT2
C5
3.3 V
AM09306v1
Table 7.
List of external components
Component Value
(1)
Recommended part number
C1, C2, C3
C4, C5
10 µF
22 µF
Murata, GRM21BR61A106KE19L
Murata, GRM32ER61C226KE20L
L1 4.7 µH Coilcraft, LPS6225-472MLB
L2
R1, R2
3.3 µH
33 k
Ω
,
3.3 k
Ω
Coilcraft, LPS4018-332MLB
V
OUT1
= 8.8 V
(2)
1.
The components listed above refer to a typical applications circuit. Operation of the STODD03 is not limited to the choice of these external components. If a different solution is used, it is recommended to validate the suitability of the external components by thoroughly testing the application on a PCB evaluation board.
2.
R1 and R2 are calculated according to the following formula:
R1 = R2 x [(V
OUT1
/ V
FB1
)- 1]. Resistors in the range of 1 k to 50 k are recommended.
Doc ID 018980 Rev 1 7/16
Electrical characteristics STODD03
8/16
Refer to the typical application circuit, V
IN_P
= V
IN_A
= V
IN_PSW
= V
EN1,2
= 5 V, V
OUT1
= 9 V,
V
OUT2
= 3.3 V, C
1,2,3
= 10 µF, C
4,5
= 22 µF, L1 = 4.7 µH, L2 = 3.3 µH, T
(unless otherwise specified, typical values are given at T
J
= 25 °C).
J
= - 25 to 125 °C
Table 8.
Symbol
Electrical characteristics
Parameter
V
IN
Input voltage range
Test conditions Min.
4
I
SUPPLY
Supply current
V
EN1,2
> 1.2 V, no switching
V
EN1,2
< 0.4 V, no switching
Step-up section
V
OUT
Output voltage range
V
FB1
I
FB1
I
OUT1_OFF
(leak)
Output leakage current
V
OUT1
OVP Overvoltage protection
(1)
R
DSon_N
R
DSon_P
Internal N-channel
R
DSon
Internal P-channel
R
DSon
I
SW1 (leak)
Internal leakage current
I
SW1 (LIM)
PWM f s
D
MAX
ν
V
EN1_H
V
EN1_L
I
EN1
ΔV
OUT1
/
ΔV
IN
Feedback voltage T
J
= 0 to 85 °C
Feedback voltage accuracy T
J
= 0 to 85 °C
Feedback current V
FB1
= 0 V, V
EN1
= 2 V
SW current limitation
Oscillator frequency
Max oscillator duty cycle
Efficiency
Enable threshold high
Enable threshold low
Enable pin current
Line transient response
(2)
ΔV
OUT1
/
ΔI
OUT
Load transient response
(2)
V
EN
= 0 V, T
J
= 0 to 80 °C
V
FB1
= 0 V
I
SW1
=400 mA
I
SW1
=400 mA
V
SW1
= 4 V, V
FB1
= 2 V, V
EN1
= 0 V
V
OUT1
= 9.2 V to be measured on SW1 pin on SW1 pin, V
FB1
= 0.7 V
I
OUT1
= 50 mA, V
OUT1
= 7 V
I
OUT1
= 500 mA, V
OUT1
= 7 V
I
OUT1
= 100 mA, V
OUT1
= 9 V
I
OUT1
= 500 mA, V
OUT1
= 9 V
V
IN
= 4 to 6 V
V
IN
= 4 to 6 V
V
EN1
= V
IN
= 5 V
V
IN
from 4 to 6 V, I
OUT1
= 500 mA, t
R
= t
F
=> 30 µs, T
J
= 25 °C
V
IN
= 5 V, I
500 mA, t
R
OUT1
from 100 mA to
= t
F
=> 5µs, T
J
= 25 °C
6.5
0.776
-3
14.8
0.75
70
1.2
-5
-5
ΔV
OUT1
/
ΔV
IN
Startup transient
(2)
V
IN from 0 to 5 V, I
OUT1
= 500 mA -10 t
START
Startup time
Inrush current
V
EN1
from 0 to 5 V, I
OUT1
=100mA
V
OUT
=9.25 V, I
OUT
=100 mA
Doc ID 018980 Rev 1
Typ.
Max.
Unit
1.6
1.2
6
2
2
V mA mA
14
0.8
0.824
3
600
2.6
1.2
90
80
85
15.3
15.8
300
300
2
75
85
1.5
2
500
1.3
20
0.4
5
5
10
µA
A
MHz
%
µA
%
V
OUT
%
V
OUT
%
V
OUT
µs
A
V
V
% nA
µA
V m
Ω
%
V
STODD03
Table 8.
Symbol
Electrical characteristics (continued)
Parameter Test conditions
Step-down section
FB
2
I
FB2
I
OUT2
I
OUT_MIN
ΔV
OUT2
PWM f
S
Feedback voltage
FB2 pin bias current
Output current
(2) (3)
%V
OUT2
/
ΔV
IN
Reference line regulation
T
J
= 0 to 85 °C
V
FB2
= 3.5 V
V
IN
= 4 to 6 V
Minimum output current
Reference load regulation
(2)
10 mA < I
OUT2
< 0.5 A
PWM switching frequency
4 V < V
IN
< 6 V
D
MAX
I
SWL
Maximum duty cycle
Switching current limitation
V
FB2
= 3.0 V
I
I
LKP2
LKN2
R
DSon
-
N
R
DSon
-
P
ΔV
OUT2
/
ΔI
OUT2
ν
V
EN2_H
V
EN2_L
I
EN2
PMOS leakage current
NMOS leakage current
V
FB2
= 3.5 V, V
SW2
= GND,
T
J
= 0 to 80 °C
V
FB2
= 3.5 V, V
SW2
= 5 V,
T
J
= 0 to 80 °C
NMOS switch-on resistance I
SW
= 250 mA
PMOS switch-on resistance I
SW
= 250 mA
Load transient response
(2)
100 mA < I
OUT2
< 500 mA, t
R
= t
F
=> 100 ns, T
J
= 25 °C
Efficiency
Enable threshold high
V
OUT
= 3.3 V, I
OUT
= 100 mA
V
OUT
= 3.3 V, I
OUT
= 500 mA
V
IN
= 4 to 6 V
Enable threshold low
Enable pin current
Power switch section
V
IN
= 4 to 6 V
V
EN2
= V
IN
= 5 V
V
V
R
DSon
-
P
I
SW
V
I
LKSW
IN_PSW
EN_SW_H
I
EN_SW_L
EN_SW
PMOS switch-on resistance I
SW
= 250 mA
Switching operating current
Switching leakage current
EN_SW = EN_SW = H,
T
J
= 0 to 80 °C
Input voltage range
Enable pins threshold high V
IN
= 4 to 6 V
Enable pins threshold low V
IN
= 4 to 6 V
Enable pins current V
EN_SW
= V
IN
= 5 V
Electrical characteristics
Min.
Typ.
Max.
Unit
3.23
700
0
85
3.3
15
5.5
1.2
0.032
94
1.5
3.37
20
15
V
µA mA mA mV
MHz
%V
OUT
/V
IN
%
A
0.1
µA
-5
0.1
0.2
0.3
µA
Ω
Ω
+5 %V
OUT
75
85
%
1.2
2
0.4
V
µA
4
1.2
0.3
1
2
1
6
0.4
Ω
A
µA
V
V
µA
Doc ID 018980 Rev 1 9/16
Electrical characteristics
Table 8.
Symbol
Electrical characteristics (continued)
Parameter Test conditions
Thermal section
T
SHDN
T
HYS
Thermal shutdown
(2)
Thermal shutdown hyst.
(2)
1.
If V
OUT1
> OVP, the device stops switching.
2.
Guaranteed by design, but not tested in production.
3.
V
OUT
= 90% of nominal value
STODD03
Min.
Typ.
Max.
Unit
130 150
15
°C
°C
10/16 Doc ID 018980 Rev 1
STODD03
6 Package mechanical data
Package mechanical data
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.
Table 9.
A
A1
A3 b
D
D2
E
E2 e
L
QFN16 (4 x 4 mm) mechanical data
Dim.
Min.
0.80
0.00
0.25
3.90
2.50
3.90
2.50
0.30
mm.
Typ.
0.90
0.02
0.20
0.30
4.00
4.00
0.65
0.40
Max.
1.00
0.05
0.35
4.10
2.80
4.10
2.80
0.50
Doc ID 018980 Rev 1 11/16
Package mechanical data
Figure 4.
QFN16 (4 x 4 mm) drawing
STODD03
12/16 Doc ID 018980 Rev 1
7571203_A
Dim.
Ko
Po
P
T
Ao
Bo
D
N
A
C
STODD03
Min.
Min.
Package mechanical data
Tape & reel QFNxx/DFNxx (4x4) mechanical data
mm.
Typ.
inch.
Typ.
Max.
330
13.2
Max.
12.992
0.519
12.8
20.2
99
0.504
0.795
3.898
101
14.4
3.976
0.567
4.35
4.35
1.1
4
8
0.171
0.171
0.043
0.157
0.315
Doc ID 018980 Rev 1 13/16
Package mechanical data
Figure 5.
QFN16 (4 x 4 mm) recommended footprint
STODD03
14/16 Doc ID 018980 Rev 1
STODD03
Table 10.
Document revision history
Date Revision
30-Aug-2011 1 First release.
Changes
Revision history
Doc ID 018980 Rev 1 15/16
STODD03
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16/16 Doc ID 018980 Rev 1
