FAN1950

www.fairchildsemi.com

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www.fairchildsemi.com

FAN1950/FAN1951
1.5A Low-Voltage Low-Dropout Regulator

Features
1.5A minimum guaranteed output current 500mV maximum dropout at 1.5A Ideal for 2.5V to 1.8V or 1.65V conversion Ideal for 3.0V to 2.5V conversion Current Limiting and Thermal shutdown External Shut-down control (FAN1951 only) Error flag output (FAN1951 only) Fast transient response Low ground current

General Description
The FAN1950 and FAN1951 are 1.5A low-dropout linear regulators that provide a low voltage, high current output with a minimum of external components. Both of these devices use a PNP output pass element achieving a maximum 500mV dropout at 1.5A load current. In addition these devices offer overcurrent limit and thermal shutdown features to ensure full protection. The FAN1951 offers a logic level enable pin and an error flag output to indicate undervoltage and over-current conditions. 1.8V and 2.5V fixed output versions are available. 3.3V, 1.65V and 1.5V options are available upon request.

Applications
General purpose conversion for low-voltage CPUs, DSP and FPGAs SMPS post regulator Cable/Satellite set-top boxes PCI Graphics adapter cards

Typical Application
FAN1950-2.5V 3.0V IN OUT GND 2.5V 10 F 100K Error Output On/Off FLAG EN GND FAN1951-1.8V 2.5V IN OUT 1.8V 10 F

REV. 0.1.6 8/30/04