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APE8955

Advanced Power Electronics
Part Number APE8955
Manufacturer Advanced Power Electronics
Description 5A ULTRA LOW DROPOUT LINEAR REGULATOR
Published Nov 20, 2008
Detailed Description Advanced Power Electronics Corp. FEATURES Ultra Low Dropout Voltage 200mV at 5A Output Current Low ESR Output Capacitor ...
Datasheet PDF File APE8955 PDF File

APE8955
APE8955

Overview
Advanced Power Electronics Corp.
FEATURES Ultra Low Dropout Voltage 200mV at 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 APE8955 DESCRIPTION The APE8955 is a 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 APE8955 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 APE8955 can be enabled by other power system.
Pulling and holding the EN pin below 0.
4V shuts off the output.
The APE8955 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.
5A ULTRA LOW DROPOUT LINEAR REGULATOR TYPICAL APPLICATION R3 1K VCNTL=5V R3 1K VCNTL=5V R4 5.
1-15Ω 6 VCNTL VIN 5 VIN=1.
5V 6 VCNTL VIN 5 C2 100uF VIN=1.
5V 7 POK VOUT 4 C3 0.
1uF 7 POK VOUT 4 C2 22uF C1 1uF APE8955 8 EN VOUT 3 R1 1K C6 12~48nF R2 2K VOUT=1.
2V/5A C1 1uF APE8955 8 EN VOUT 3 VOUT=1.
2V/5A R1 39K 1 GND FB 2 1 C4 220uF C5 0.
1uF GND FB 2 C4 30pF C3 22uF R2 78K VOUT=VFB x (1+R1/R2) VFB=0.
8V Figure 1.
Output Capacitor with ESR > 20mΩ Figure 2.
Outp...


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