www.fairchildsemi.com
FAN1950/FAN1951
1.5A Low-Voltage Low-Dropout Regulator
Features
• 1.5A minimum guaranteed output...
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 10µF 100KΩ Error Output On/Off FLAG EN GND FAN1951-1.8V 2.5V IN OUT 1.8V 10µF
REV. 0.1.6 8/30/04
FAN1950/FAN1951
Pin Assignments
FAN1950Dx FRONT VIEW FAN1951Dx FRONT VIEW
1
2
3
1
2
3
4
5
GND (TAB)
GND (TAB)
OUT
EN
OUT
IN
IN
3-Lead Plastic TO-252 ...