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FAN1950 Datasheet

  • FAN1950

  • 1.5A Low-Voltage Low-Dropout Regulator

  • 11頁

  • FAIRCHILD

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www.fairchildsemi.com
FAN1950/FAN1951
1.5A Low-Voltage Low-Dropout Regulator
Features
鈥?1.5A minimum guaranteed output current
鈥?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
鈥?Current Limiting and Thermal shutdown
鈥?External Shut-down control (FAN1951 only)
鈥?Error 鏗俛g output (FAN1951 only)
鈥?Fast transient response
鈥?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 maxi-
mum 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
鏗俛g output to indicate undervoltage and over-current condi-
tions. 1.8V and 2.5V 鏗亁ed output versions are available.
3.3V, 1.65V and 1.5V options are available upon request.
Applications
鈥?General purpose conversion for low-voltage CPUs,
DSP and FPGAs
鈥?SMPS post regulator
鈥?Cable/Satellite set-top boxes
鈥?PCI Graphics adapter cards
Typical Application
FAN1950-2.5V
3.0V
IN
OUT
GND
2.5V
10碌F
100K鈩?/div>
Error Output
On/Off
FLAG
EN
GND
FAN1951-1.8V
2.5V
IN OUT
1.8V
10碌F
REV. 0.1.6 8/30/04

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