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APE8953

更新时间: 2024-11-11 06:37:23
品牌 Logo 应用领域
富鼎先进 - A-POWER 稳压器
页数 文件大小 规格书
8页 472K
描述
3A ULTRA LOW DROPOUT LINEAR REGULATOR

APE8953 数据手册

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Advanced Power  
Electronics Corp.  
APE8953  
3A ULTRA LOW DROPOUT LINEAR REGULATOR  
FEATURES  
DESCRIPTION  
The APE8953 is a 3A 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  
voltage for the circuitry and a main supply voltage for power  
conversion to reduce power dissipation and provide  
extremely low dropout. The APE8953 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 APE8953  
can be enabled by other power system. Pulling and holding  
the EN pin below 0.4V shuts off the output.  
Ultra Low Dropout Voltage 250mV at 3A 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  
The APE8953 is available in ESOP-8 package which  
features small size as SO-8 and exposed pad to reduce the  
junction-to-case resistance, being applicable in 2~3W  
applications.  
TYPICAL APPLICATION  
R3  
1K  
R3  
1K  
VIN=1.5V  
VCNTL=5V  
VIN=1.5V  
VCNTL=5V  
6
7
8
1
5
4
3
2
6
7
8
5
4
3
VCNTL  
POK  
VIN  
VCNTL  
POK  
VIN  
C2  
22uF  
C2  
100uF  
C3  
0.1uF  
VOUT  
VOUT  
APE8953  
C1  
1uF  
APE8953  
C1  
1uF  
VOUT=1.2V/3A  
VOUT=1.2V/3A  
EN  
VOUT  
FB  
EN  
VOUT  
FB  
R1  
39K  
R1  
1K  
C4  
56pF  
C6  
1
2
12~48nF  
C3  
22uF  
C5  
GND  
C4  
GND  
0.1uF  
220uF  
R2  
78K  
R2  
2K  
VOUT=VFB x (1+R1/R2)  
VFB=0.8V  
Figure 2. Output Capacitor is MLCC  
Figure 1. Output Capacitor with ESR > 20mΩ  
PACKAGE ORDERING INFORMATION  
APE8953  
Package type  
MP : ESOP-8  
Data and specifications subject to change without notice  
1
20080828A  

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