Advanced Power
Electronics Corp.
APE1184-HF-3
4A Ultra-low Dropout Regulator
Features
Description
Maximum Dropout Voltage of 0.7V
at 4A load current
Built-In Thermal Shutdown
The APE1184-HF-3 is a 4A regulator with extremely low
drop-out voltage.This product is specifically designed
to provide regulated supplies for applications requiring
voltages of 2.8V or less from 3.3V ATX power supplies.
The high efficiency of a switcher can be achieved
without the cost and complexity associated with switching
regulators. One such application is for the new graphic
chip sets that require anywhere from 2.4V to 2.7V
supply voltage.
The APE1184-HF-3 is available in RoHS-compliant,
halogen-free five-lead TO-220, TO-252 and TO-263
packages.
Output Current Limiting
Adjustable, or Fixed Output Voltages of
1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5.0V
Fast Transient Response
Good Noise Rejection
RoHS-compliant and Halogen-free package
Typical Application
5V
10uF
3.3V
470uF
Vctrl
VOUT
VIN
Vsense
2.5V/4A
470uF
GND
Figure 1 - Typical application of APE1184S-25-HF-3 in a 5V to 2.5V supply.
Ordering Information
Halogen Free
APE1184x-xx-HF-3Tx
Packing:
TR = Tape and Reel (TO-252/TOL-263 only)
TB = Tubes (TO-220 only)
Output Voltage:
Package Type:
H : TO-252-5L
S : TO-263-5L
P : TO-220-5L
Blank : Adj
12 : 1.2V
15 : 1.5V
18 : 1.8V
25 : 2.5V
33 : 3.3V
50 : 5.0V
APE1184H-xx-HF-3TR : in RoHS-compliant halogen-free 5-pin TO-252 on tape and reel (3000 pcs/reel)
APE1184S-xx-HF-3TR : in RoHS-compliant halogen-free 5-pin TO-263 on tape and reel (800 pcs/reel)
APE1184P-xx-HF-3TB : in RoHS-compliant halogen-free 5-pin TO-220 in tubes (50 pcs/tube)
©2011 Advanced Power Electronics Corp. USA
www.a-powerusa.com
201106288-3
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Advanced Power
Electronics Corp.
APE1184-HF-3
Absolute Maximum Ratings
Input Voltage (V N) .................................................... 16V
Control Input Voltage (V CTRL) ..................................... 18V
Power Dissipation ..................................................... Internally Limited
Storage Temperature Range ...................................... -65°C to 150°C
Operating Junction Temperature Range ..................... 0°C to 150°C
TO-220-5L ---- 2.7oC/W
Thermal Resistance from Junction to Caset(Rth JC)
TO-263-5L ---- 2.7oC/W
TO-252-5L ---- 10oC/W
Electrical Specifications
Unless otherwise specified, these specifications apply over, C in=1uF, Cout=10uF, and Tj=0 to 150oC.
Typical value refer to Tj=25oC. Vout=Vsense.
Parameter
SYM
TEST CONDITION
MIN
TYP
MAX
UNITS
Reference Voltage (Adj only)
VREF
IO=10mA, TJ=25oC, (VIN-VOUT)=0.7V, VCNTL=VIN+1V
1.225
1.25
1.275
V
IO=10mA, VOUT+0.7V<VIN<12V, TJ =25oC, VCNTL=VIN+1V
%
Line Regulation (Fixed only)
APE1184-12
APE1184-15
Output Voltage
APE1184-18
-
-
0.5
o
1.176
1.2
1.224
o
1.47
1.5
1.53
o
1.764
1.8
1.836
o
IO=10mA, TJ=25 C, 2.2V < VIN < 12V, VCNTL=VIN+1V
IO=10mA, TJ=25 C, 2.2V < VIN < 12V, VCNTL=VIN+1V
IO=10mA, TJ=25 C, 2.5V < VIN < 12V, VCNTL=VIN+1V
IO=10mA, TJ=25 C, 3.2V < VIN < 12V, VCNTL=VIN+1V
2.45
2.5
2.55
APE1184-33
IO=10mA, TJ=25oC, 4V < VIN < 12V, VCNTL=VIN+1V
3.235
3.3
3.365
4.9
5
5.1
-
-
1
-
10
12
-
12
15
-
15
18
APE1184-25 VIN=4V, 0mA < IO < 4A, TJ=25 C, VCNTL=5V
-
20
25
APE1184-33 VIN=5V, 0mA < IO < 4A, TJ=25oC, VCNTL=6V
-
26
33
-
40
50
VIN=2.05V, IO=1.5A
-
-
1.15
V
VIN=2.05V, IO=3A
-
-
1.25
V
VIN=2.05V, IO=4A
-
1.25
1.4
V
VCNTL=2.75V, IO=1.5A
-
0.26
0.38
V
VCNTL=2.75V, IO=3A
-
0.5
0.6
V
VCNTL=2.75V, IO=4A
-
0.7
0.85
V
4.2
-
-
A
APE1184-50
APE1184
o
IO=10mA, TJ=25 C, 5.7V < VIN < 12V, VCNTL=VIN+1V
0mA < IO < 4A, TJ=25oC,
(VIN-VOUT)=2V, VCNTL=V N+1V
APE1184-12 VIN=3V, 0mA < IO < 4A, TJ=25oC, VCNTL=4V
o
Load Regulation
V
APE1184-25
APE1184-15 VIN=3V, 0mA < IO < 4A, TJ=25 C, VCNTL=4V
APE1184-18
o
VIN=3.3V, 0mA < IO < 4A, T J=25 C, VCNTL=4.3V
o
o
APE1184-50 VIN=8V, 0mA < IO < 4A, TJ=25 C, VCNTL=9V
%
mV
Vadj=0V for all conditions below.
Dropout Voltage (VCNTL-VOUT)
Vadj=0V for all conditions below.
Dropout Voltage (VIN -VOUT )
Current Limit
VCNTL=2.75V, VIN=2.05V, ∆Vo =100mV, Vadj =0V
Minimum Load Current
VCNTL=5V, V N=3.3V, VAdj=0V
-
5
10
mA
Thermal Regulation
30ms Pulse
-
0.01
0.02
%/W
60
70
-
dB
Ripple Rejection
VCNTL=5V, VIN=5V, IO=4A, Vadj=0V, TJ=25, Vripple=1Vpp at 120Hz
Vadj=0V for all conditions below.
Control Pin Current
Adj Pin Current
©2011 Advanced Power Electronics Corp. USA
www.a-powerusa.com
Iadj
VCNTL=2.75V, IO=1.5A
-
6
25
VCNTL=2.75V, IO=3A
-
30
60
VCNTL=2.75V, IO=4A
-
33
70
VCNTL=2.75V, VIN=2.05,Vadj=0
-
50
150
mA
uA
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Advanced Power
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Pin Configuration
Top View
TO-252-5L
Tab is connected to Vout
1
2
3
APE1184-HF-3
Top View
TO-263-5L
Top View
TO-220-5L
5
1
1
3
2
3
5
5
VIN
VCNTL
VOUT
Adj (GND)
1.VSENSE
2.Adj (GND)
3.VOUT
4.VCNTL
5.VIN
VSENSE
VIN
VCNTL
VOUT
Adj (GND)
VSENSE
Pin Descriptions
2
PIN SYMBOL
PIN DESCRIPTION
This pin is the positive side of the reference which allows remote load sensing to achieve excellent
VSENSE
load regulation. A capacitor of at least 10uF must be connected from this pin to ground to ensure stability.
A resistor divider from this pin to VOUT and ground sets the output voltage. Connect to GND only for fixed mode.
Adj (Gnd)
VOUT
The output of the regulator. A minimum of 100µF capacitor must be connected from this pin to
ground to ensure stability.
VCTRL
This pin is the supply pin for the internal control circuitry as well as the base drive for the pass transistor.
This pin must always be higher than the VOUT pin in order for the device to regulate. (See specifications)
A capacitor of at least 100uF capacitor must be connected from this pin to ground to insure stability.
VIN
The input pin of the regulator. Typically a large storage capacitor is connected from this pin to ground
to ensure that the input voltage does not sag below the minimum drop out voltage during the load
transient response. This pin must always be higher than VOUT in order for the device to regulate.
(See specifications)
Block Diagram
VIN
VOUT
VCTRL
VSENSE
+
1.25V
(1.2V)
+
CURRENT
LIMIT
THERMAL
SHUTDOWN
Adj
Figure 2 - Simplified block diagram of the APE1184
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Advanced Power
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APE1184-HF-3
Function Description
Introduction
The APE1184-HF-3 regulator is a five-terminal device designed specifically to provide extremely low
dropout voltages comparable to the PNP type without the disadvantage of the extra power dissipation
due to the base current associated with PNP regulators. This is done by bringing out the control pin of
the regulator that provides the base current to the power NPN and connecting it to a voltage that is
greater than the voltage present at the Vin pin. This flexibility makes the APE1184-HF-3 ideal for
applications where dual inputs are available such as a computer motherboard with an ATX style
power supply that provides 5V and 3.3V to the board. One such application is the new graphic chip
sets that require anywhere from 2.4V to 2.7V supply. The APE1184 can easily be programmed with
the addition of two external resistors to any voltage within the range of 1.2V to 15.5V. Another major
requirement of these graphic chips is the need to switch the load current from zero to several amps in
tens of nanoseconds at the processor pins, which approximately translates to a 300 to 500ns current
step at the regulator. In addition, the output voltage tolerances are extremely tight and the transient
response is included as part of the specification.
The APE1184 is specifically designed to meet the fast current transient needs as well as providing
an accurate initial voltage, reducing the overall system cost with the need for fewer output capacitors.
Another feature of the device is its true remote sensing capability allowing accurate voltage setting at
the load rather than at the device.
Output Voltage Setting
The APE1184-ADJ can be programmed to any voltage in the range of 1.2V to 15.5V with the
addition of R1 and R2 external resistors according to the following formula:
The APE1184-ADJ keeps a constant 1.25V between the Vsense pin and the Adj pin. By placing
a resistor R1 across these two pins and connecting the Vsense ans Vout pin together, a constant
current flows through R1, adding to the Iadj current and into the R2 resistor producing a voltage equal
to the (1.25/R1)*R2 + Iadj*R2. This voltage is then added to the 1.25V to set the output voltage. This
is summarized in the above equation. Since the minimum load current requirement of the APE1184ADJ is 10mA, R1 is typically selected to be a 121Ω resistor so that it automatically satisfies this
condition. Notice that since the Iadj is typically in the range of 50uA it only adds a small error to the
output voltage and should only be considered when very precise output voltage setting is required.
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APE1184-HF-3
Function Description (cont.)
Load Regulation
Since the APE1184 has separate pins for the output (Vout) and the sense (Vsense), it is ideal for
providing true remote sensing of the output voltage at the load. This means that the voltage drops
due to parasitic resistance such as PCB traces between the regulator and the load are compensated
for using remote sensing. Figure following shows a typical application of the APE1184-ADJ with
remote sensing.
Stability
The APE1184-XX requires the use of an output capacitor as part of the frequency compensation
in order to make the regulator stable. Typical designs for the microprocessor applications use
standard electrolytic capacitors with typical ESR in the range of 50 to 100mΩ and an output
capacitance of 100uF to 1000uF. Fortunately as the capacitance increases, the ESR decreases
resulting in a fixed RC time constant. The APE1184-XX takes advantage of this phenomena in
making the overall regulator loop stable. For most applications a minimum of 100uF aluminum
electrolytic capacitor ensures both stability and good transient response.
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Advanced Power
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APE1184-HF-3
Typical Performance Characteristics
Vcontrol Dropout Voltage vs Output Current
Vpower Dropout Voltage vs Output Current
Reference Voltage vs Junction Temperature
Load Regulation vs Output Current
Transient Response
L
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Advanced Power
Electronics Corp.
APE1184-HF-3
Package Dimensions: TO-252-5L
A
SYMBOLS
B
Millimeters
MIN
NOM
MAX
A
6.40
6.6
6.80
B
5.2
5.35
5.50
C
6.80
7.00
7.20
D
2.20
2.50
2.80
1.27 REF.
P
C
E3
M
S
0.50
0.65
0.80
E3
G
3.50
0.40
4.00
0.50
4.50
0.60
H
2.20
2.30
2.40
J
0.45
0.50
0.55
K
0.00
0.075
0.15
L
0.90
1.20
1.50
M
5.40
5.60
5.80
D
S
P
G
1. All dimensions are in millimeters.
2. Dimensions do not include mold protrusions.
H
K
J
L
Marking Information: TO-252-5L
Product: APE1184
Package Code: H = RoHS-compliant, halogen-free TO-252-5L
1184H-XX
Output Voltage
YWWSSS
Date/lot code (YWWSSS)
Y: Last digit of the year
WW: Work week
SSS: Lot code sequence
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Advanced Power
Electronics Corp.
APE1184-HF-3
Package Outline: TO-263-5L
Millimeters
SYMBOLS
MIN
NOM
MAX
A
4.40
4.60
4.80
b
0.66
0.79
0.91
L4
0.00
0.15
0.30
c
0.36
0.43
0.50
L1
2.29
2.54
2.79
E
9.80
10.10
10.40
1.25
1.35
E1
c2
7.60
L2
D
1.45
1.27
8.60
8.80
D1
5.90
e
1.70
9.00
L
14.60
15.20
15.80
θ
0°
4°
8°
1. All dimensions are in millimeters.
2. Dimensions do not include mold protrusions.
Marking Information: TO-263-5L
Product: APE1184
Package: S = RoHS-compliant halogen-free TO-263-5L
1184S-xx
YWWSSS
Output Voltage
Date/lot code (YWWSSS)
Y: Last digit of the year
WW: Work week
SSS: Lot code sequence
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APE1184-HF-3
Package Dimensions: TO-220-5L
SYMBOLS
Millimeters
MIN
NOM
MAX
A
4.07
4.45
4.82
b
0.76
0.89
1.02
C
D
E
e
0.36
0.50
0.64
14.22 14.86 15.50
9.78
10.16 10.54
1.57
1.71
1.85
e1
6.68
6.81
6.93
F
1.14
1.27
1.40
H1
5.46
6.16
6.86
J1
2.29
2.74
3.18
L
13.21 13.97 14.73
φP
Q
3.68
3.81
3.94
2.54
2.73
2.92
1. All dimensions are in millimeters.
2. Dimensions do not include mold protrusions.
Marking Information: TO-220-5L
Product: APE1184
1184P-XX
Output Voltage
Package: P = RoHS-compliant halogen-free TO-220-5L
YWWSSS
Date/lot code (YWWSSS)
Y: Last digit of the year
WW: Work week
SSS: Lot code sequence
©2011 Advanced Power Electronics Corp. USA
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