APE8957 Advanced Power Electronics Corp., APE8957 Datasheet

       The APE8957 is a 7A ultra low dropout linear regulator

APE8957

Manufacturer Part Number
APE8957
Description
       The APE8957 is a 7A ultra low dropout linear regulator
Manufacturer
Advanced Power Electronics Corp.
Datasheet

Specifications of APE8957

Vin(min)
1.1
Vin(max)
3.3
Vout(min)
0.8
Vout(max)
3.1
Iout(max)
7
Vref
0.8
En
?
Pok
?
Package
Exposed SOP8
FEATURES
Data and specifications subject to change without notice
TYPICAL APPLICATION
PACKAGE ORDERING INFORMATION
VCNTL=5V
Ultra Low Dropout Voltage 150mV at 7A Output Current
Low ESR Output Capacitor (MLCC) Applicable
0.8V Reference Voltage
Fast Transient Response
Current Limit and Thermal Shutdown Protection
Adjustable Output Voltage by External Resistors
Power-on-Reset Monitoring on Both VCNTL and
VIN Pins
Under Voltage Protection
Power OK Output with a Delay Time
Internal Soft-Start
SOP-8 with Exposed Pad Package
RoHS Compliant & Halogen Free
Figure 1. Output Capacitor with ESR > 20mΩ
1uF
C1
APE8957
Advanced Power
Electronics Corp.
MP : ESOP-8
Package type
6
7
8
1
VCNTL
POK
GND
EN
APE8957
R3
1K
VOUT
VOUT
VIN
FB
5
4
3
2
R1
1K
R2
2K
12~48nF
7A ULTRA LOW DROPOUT LINEAR REGULATOR
C6
100uF
C2
0.1uF
220uF
C3
C4
VIN=1.5V
VOUT=1.2V/7A
0.1uF
C5
DESCRIPTION
VCNTL=5V
The product is specifically designed to provide well supply
voltage for front side bus termination on motherboard and
NB applications. The IC needs two supply voltages, a
voltage for the circuitry and a main supply voltage for power
conversion, to reduce power dissipation and provide
extremely low dropout. The APE8957 integrates many
functions. A Power-on-Reset(POR) circuit monitors both
supply voltage to prevent wrong operations. A thermal
shutdown and current limit functions protect the device
against thermal and current over-load. A POK indicates the
output status with time delay which is set internally. It can
control other converter for power sequence. The APE8957
can be enabled by other power system. Pulling and holding
the EN pin below 0.4V shuts off the output.
features small size as SO-8 and exposed pad to reduce the
junction-to-case resistance, being applicable in 2~3W
applications.
The APE8957 is a 7A ultra low dropout linear regulator.
The APE8957 is available in ESOP-8 package which
1uF
C1
5.1-15Ω
R4
Figure 2. Output Capacitor is MLCC
VOUT=VFB x (1+R1/R2)
VFB=0.8V
6
7
8
1
VCNTL
POK
GND
EN
APE8957
R3
1K
VOUT
VOUT
VIN
FB
5
4
3
2
APE8957
39K
R1
78K
R2
22uF
C2
30pF
C4
200809103
22uF
C3
VOUT=1.2V/7A
VIN=1.5V
1

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APE8957 Summary of contents

Page 1

... Data and specifications subject to change without notice 7A ULTRA LOW DROPOUT LINEAR REGULATOR DESCRIPTION The APE8957 ultra low dropout linear regulator. The product is specifically designed to provide well supply voltage for front side bus termination on motherboard and NB applications. The IC needs two supply voltages, a ...

Page 2

... A SYM TEST CONDITION V CNTL(PORTH) V CNTL(hys) V IN(PORTH) V IN(hys) I EN=V CNTL CNTL I EN= =3 CNTL OUT I = 7A, V =5V, T OUT CNTL V DROP I = 7A, V =5V, T OUT CNTL APE8957 2 (multi-layers) MIN TYP MAX 2.7 2.9 3.1 - 0.4 - 0.8 0.9 1.0 - 0 0.784 0.8 0.816 - 0.06 0 0.15 0 =25~125 ...

Page 3

... DELAY T SD PIN DESCRIPTION GND Pin Feedback Pin IC Power Supply Pin H : Normal Operation ; L : Shutdown Power OK Output Pin VCNTL Pin Input Voltage Input Voltage N-MOSFET Current Limit Reset Soft-Start And Control Logic 0.4V Delay POK APE8957 - 2 0.4 0.8 - 130 - 10 o =25 C 7.2 8 =-25~125 0.4 90% ...

Page 4

... An internal soft-start function controls rise rate of the output voltage to limit the current surge at start-up. The typical soft-start interval is about 2ms. Current Limit The APE8957 monitors the current via the output NMOS and limits the maximum current to prevent load and APE8957 from damage during overload or short circuit VOUT = 0 R1/R2) ...

Page 5

... NMOS which provides load current from VIN to VOUT. Under Voltage Protection (UVP) The APE8957 monitors the voltage on FB pin after soft-start process is finished. Therefore the UVP is disabling during soft-start. When the voltage on FB pin falls below the under-voltage threshold, the UVP circuit shuts off the output immediately. ...

Page 6

... Package Outline : ESOP Part Marking Information & Packing : ESOP-8 8957MP YWWSSS ADVANCED POWER ELECTRONICS CORP Part Number Package Code Date Code (YWWSSS) Y:Last Digit Of The Year WW:Week SSS:Sequence Millimeters SYMBOLS MIN NOM A 5.80 6.00 B 4.80 4.90 C 3.80 3.90 D 0° 4° E 0.40 0.65 F 0.19 0.22 M 0.00 0.08 H 0.35 0. ...

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