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APE8951 Datasheet(PDF) 1 Page - Advanced Power Electronics Corp.

Part No. APE8951
Description  1.5A ULTRA LOW DROPOUT LINEAR REGULATOR
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Maker  A-POWER [Advanced Power Electronics Corp.]
Homepage  http://www.a-power.com.tw
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APE8951 Datasheet(HTML) 1 Page - Advanced Power Electronics Corp.

   
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Advanced Power
Electronics Corp.
FEATURES
DESCRIPTION
Ultra Low Dropout Voltage 250mV at 1.5A
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
Data and specifications subject to change without notice
20100107D
APE8951
TYPICAL APPLICATION
ORDERING INFORMATION
1
1.5A ULTRA LOW DROPOUT LINEAR REGULATOR
The APE8951 is a 1.5A 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 APE8951 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 APE8951
can be enabled by other power system. Pulling and holding
the EN pin below 0.4V shuts off the output.
The APE8951 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.
Figure 1. Output Capacitor with ESR > 20mΩ
Figure 2. Output Capacitor is MLCC
VCNTL
6
POK
7
8
EN
1
GND
VIN
VOUT
VOUT
FB
5
4
3
2
APE8951
R3
1K
C1
1uF
VCNTL=5V
R1
1K
R2
2K
C6
12~48nF
C4
220uF
C5
0.1uF
C3
0.1uF
VIN=1.5V
VOUT=1.2V/1.5A
C4
220uF
VCNTL
6
POK
7
8
EN
1
GND
VIN
VO UT
VO UT
FB
5
4
3
2
APE8951
R3
1K
C1
1uF
VCNTL=5V
R1
39K
R2
78K
C4
56pF
C3
22uF
VIN=1.5V
VOUT=1.2V/1.5A
VOUT=VFB x (1+R1/R2)
VFB=0.8V
C2
22uF
Package Type
APE8951X - HF
Halogen Free
MP : ESOP-8


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