1
APE8871
500mA Low Dropout Regulator with Enable
FEATURES
Adjustable Output Low to 0.8V
Input Voltage as Low as 1.4V and VPP Voltage
5V
250mV Dropout @ 500mA, VO 1.2V
Over Current and Over Temperature Protection
Enable Pin
Low Reverse Leakage (Output to Input )
Advanced DFN 3x3 Package
±2% Output Voltage
VO Power OK Signal
1.2V, 1.5V, 1.8V and 2.5V and Adjustable
Output Voltage
VO Pull Low Resistance when Disable
APPLICATIONS
Motherboards
Peripheral Cards
Network Cards
Set Top Boxes
Notebook Computers
DESCRIPTION
The APE8871 is a high performance positive voltage
regulator designed for use in applications requiring
very low Input voltage and very low dropout voltage at
up to 0.5 amps. It operates with a VIN as low as 1.4V and
VPP voltage 5V with output voltage programmable as
low as 0.8V. The APE8871 features ultra low dropout,
ideal for applications where VOUT is very close to VIN.
Additionally, the APE8871 has an enable pin to further
reduce power dissipation while shutdown. The APE8871
provides excellent regulation over variations in line,
load and temperature. The APE8871 provides a power
OK signal to indicate if the voltage level of VO reaches
92% of its rating value.
The APE8871 is available in the DFN 3x3 package.
It is available with 1.2V, 1.5V, 1.8V and 2.5V in-ternally
preset outputs that are also adjustable using external
resistors.
ORDERING INFORMATION
PIN CONFIGURATION TYPICAL APPLICATION CIRCUIT
VIN
VO
R1
R2
VEN
VIN
VO
ADJ
GND
0.8 (R1+R2)
VO = R2 Volts
C1
10µFC2
10µF
R2<120kΩis recomm end ed
VPPVPP (5V) POK VOUT
10kΩ
CPP
1µF
VIN
VO
R1
R2
VEN
VIN
VO
ADJ
GND
APE8871
0.8 (R1+R2)
VO = R2 Volts
C1
10µFC2
10µF
R2<120kΩis recomm end ed
VPPVPP (5V) POK 10kΩ
CPP
1µF
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Electronics Corp.
APE8871GN3-ADJ 8871 -40 °C~+85°C
APE8871GN3-12 887A -40 °C~+85°C
APE8871GN3-15 887B -40 °C~+85°C
APE8871GN3-18 887C -40 °C~+85°C
DFN 3x3
APE8871GN3-25 887D -40 °C~+85°C
RoHS Compliant
ORDER NUMBER MARKING TEMP. RANGE PACKAGE
DVBT
200809222
DFN 3x3
1
2
3
4
8
7
6
5
POK
VEN
VIN
VPP
GND
ADJ/NC
VO
NC
NC
2
APE8871
PIN DESCRIPTION
PIN NAME FUNCTION
1 POK Assert high once VO reaches 92% of its rating voltage. Open-drain output.
2 VEN Enable Input. Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a frac-
tion of its operating value. The device will be enabled if this pin is left open.
3 VIN Input voltage. Large bulk capacitance should be placed closely to this pin. A 10µF ceramic capacitor is
recommended at this pin.
4 VPP Input voltage for controlling circuit.
5 NC Not connected.
6 VO The power output of the device. A pull low resistance exists when deactivate device by VEN.
7 ADJ/NC This pin, when it sets the output voltage by the internal feedback resistors, is NC pin.
If external feedback resistors are used, the output voltage will be
VO = 0.8(R1+R2)/R2 Volts.
8 GND Reference ground.
DEFINITIONS
Dropout Voltage
The input/output Voltage differential at which the regu-
lator output no longer maintains regulation against fur-
ther reductions in input voltage. Measured when the
output drops 2% below its nominal value, dropout volt-
age is affected by junction temperature, load current
and minimum input supply requirements.
Line Regulation
The change in output voltage for a change in input
voltage. The measurement is made under conditions of
low dissipation or by using pulse techniques such that
average chip temperature is not significantly affected.
Load Regulation
The change in output voltage for a change in load cur-
rent at constant chip temperature. The measurement is
made under conditions of low dissipation or by using
pulse techniques such that average chip temperature is
not significantly affected.
Maximum Power Dissipation
The maximum total device dissipation for which the
regulator will operate within specifications.
Quiescent Bias Current
Current which is used to operate the regulator chip and
is not delivered to the load.
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Electronics Corp.
BLOCK DIAGRAM
Layout Consideration
The output capacitors must be located as close to the
VOUT terminal of the device as possible. It is recommended
to use a section of a layer of the PC board as a plane to
connect the VOUT pin to the output capacitors to prevent
any high frequency oscillation that may result due to
excessive trace inductance.
Sense Select
R1
R2
3
APE8871
ABSOLUTE MAXIMUM RATINGS (Note 1)
VPP, VIN, Input Voltage. . . . . . . . . . . . . . . . . . . . . . . 6.5V
Power Dissipation Internally Limited (Note 2)
Maximum Junction Temperature. . . . . . . . . . . . . 150°C
Storage Temperature Range. . . . . . -65°C ≤TJ ≤ +150°C
Thermal Resistance Junction to Ambient, (θJA)
DFN 3x3. . . . . . . . . . . . . . . . . . . . .150°C/W
Thermal Resistance Junction to Case, (θJC)
DFN 3x3 . . . . . . . . . . . . . . . . . . . . . . . . . . . .40°C/W
ESD Rating (Human Body Model) . . . . . . . . . . . . 2kV
OPERATION CONDITIONS
VIN Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 1.4V ~5.5V
VPP Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 4.5V~ 5.5V
Temperature Range. . . . . . . . . . . . -40°C ≤TA ≤ +85°C
ELECTRICAL CHARACTERISTICS
VPP=5V, VIN =VO+0.5V, VEN=VPP, IO=10mA, CIN=10 µF, COUT =10µF, TA=TJ=25 °C unless otherwise specified. (Note 3)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT
VIN
Input Voltage Range VIN 1.4 --- 5.5 V
Quiescent Current (Ground Current) IQ VO=1.8V, IO=0mA --- 100 300 uA
VPP
VPP Voltage Range VPP 4.5 --- 5.5 V
IPPH
IO=0mA --- 0.23 0.5 mA
VPP Current
IPPL V
EN=0V --- --- 1 µA
VO
Output Voltage (Internal Fixed Voltage) VO V
IN=VO+0.5V,VO=1.8V 1.764 1.8 1.836 V
Line Regulation VIN=(VO+0.5V) to 5V --- 0.2 1 %
Load Regulation 10mA<IO<0.5A --- 0.2 1 %
Dropout Voltage VD I
O=500mA --- 200 250 mV
Short Circuit Current --- 3 --- A
VO Pull Low Resistance VEN=0V --- 90 ---
Ω
ADJ
Reference Voltage VREF V
ADJ=VO 0.788 0.8 0.812 V
Adjust Pin Current IADJ --- 20 100 nA
VEN
VEN Pin Voltage High VENH 1.6 --- --- V
VEN Pin Voltage Low VENL --- --- 0.4 V
VEN Pin Bias Current IENH V
EN=0V --- 12 20 µA
POK
VO Power OK Voltage VTHPOK --- 92 --- %
Hysteresis VHYPOK --- 7 --- %
Over Temperature Protection
Over Temperature TOT --- 150 --- °C
Over Temperature Hysteresis TOTHY --- 30 --- °C
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are
conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications
and test conditions see the Electrical Characteristics.
Note 2: The maximum power dissipation is a function of the maximum junction temperature, TJmax ; total thermal resistance,
θJA, and ambient temperature TA. The maximum allowable power dissipation at any ambient temperature is (Tjmax-TA)
/
θJA. If this dissipation is exceeded, the die temperature will rise above 150°C and IC will go into thermal shutdown.
Note3: Low duty pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
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Electronics Corp.
Vout Voltage. . . . . . . . . . . . . . . . . . . . . .0.8V~2.7V
IO=0.5A --- 5 6 mA
Vpp
Vin
EN
OUT
EN
OUT
Vin
Vpp
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Electronics Corp.
4
APE8871
POWER SEQUENCE DIAGRAM
POWER ON SEQUENCE
POWER OFF SEQUENCE
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Electronics Corp. APE8871
TYPICAL PERFORMANCE CHARACTERISTICS
5
0.9V 1.2V
1.5V
1.8V
2.4V
Quiescent Current vs. Input Voltage
0
50
100
150
200
250
300
1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Quiescent Current (uA)
Quiescent Current vs. Temperature
0
50
100
150
200
250
300
-40 -20 0 20 40 60 80 100
Temperature (℃)
Quiescent Current (uA)
Output Voltage vs. Input Voltage
1.18
1.19
1.2
1.21
1.22
1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Output Voltage (V)
Output Voltage vs. Load Current
1.18
1.19
1.2
1.21
1.22
0 0.1 0.2 0.3 0.4 0.5
Load Current (A)
Output Voltage (V)
Vpp Current vs. Input Voltage
0
100
200
300
400
500
1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Vpp Current (uA)
Vpp Current vs. Temperature
0
100
200
300
400
500
-40 -20 0 20 40 60 80 100
Temperature (℃)
Vpp Current (uA)
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Electronics Corp. APE8871
TYPICAL PERFORMANCE CHARACTERISTICS
6
Output Voltage vs. Temperature
1.18
1.19
1.2
1.21
1.22
-40 -20 0 20 40 60 80 100
Temperature (℃)
Output Voltage (V)
Reference Voltage vs. Input Voltage
0.788
0.792
0.796
0.8
0.804
0.808
0.812
1.5 2 2.5 3 3.5 4 4.5 5 5.5
Input Voltage (V)
Reference Voltage (V)
Reference Voltage vs. Temperature
0.788
0.792
0.796
0.8
0.804
0.808
0.812
-40 -20 0 20 40 60 80 100
Temperature (℃)
Reference Voltage (V)
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Electronics Corp. APE8871
TYPICAL PERFORMANCE CHARACTERISTICS
Vin OFF Waveform
7
Short Circuit Current Load Transient
Enable Sequence Shutdown Sequence
Vin Start up Waveform
Package Outline : DFN (3x3)
Millimeters
MIN NOM MAX
0.80 0.90 1.00
0.00 0.02 0.05
0.25 0.30 0.35
__ 0.2 REF __
2.9 3.00 3.1
1.65 1.70 1.75
2.9 3.00 3.1
1.95 2.00 2.05
__ 0.65 __
0.3 0.35 0.4
0 __ 0.08
1.All Dimension Are In Millimeters.
2.Dimension Does Not Include Mold Protrusions.
Part Marking Information & Packing : DFN (3x3)
D
D2
E
E2
A
A1
b
C
SYMBOLS
ADVANCED POWER ELECTRONICS CORP.
e
L
y
Date Code (YWWS)
Y：Last Digit Of The Year
WW：Week
S：Sequence
887X
YWWS
Part Number : 887
8
Output Voltage :
1 : Adj
A : 1.2V B : 1.5V
C : 1.8V D : 2.5V
