General Description

The FAC2576 is a series of easy to use fixed and

adjustable step-down (buck) switch-mode voltage

regulators. These devices are available in fixed

output voltage of 3.3V, 5V, and an adjustable

and include internal frequency compensation, and

a fixed-frequency oscillator.

The output voltage is guaranteed to ±3%

tolerance under specified input voltage and

output load conditions. The oscillator frequency is

guaranteed to ±15%. External shutdown is

included, featuring typically 80 µA standby current.

Self protection features include a two stage

frequency reducing current limit for the output

TO220-5L and TO-263-5L packages.

Features

• 3,3V,5V and adjustable output versions

• Output adjustable from 1.23v to 43V

• Fixed 52KHz frequency internal oscillator

• Guaranteed 3A output load current

Q

typically 80 µA

• TTL shutdown capability

• Excellent line and load regulation

• Requires only 4 external components

• High efficiency

• Thermal shutdown and current limit protection

• On-card switching regulators

• Positive to negative converter

• LCD monitor and LCD TV

• DVD recorder and PDP TV

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• Step-down to 3.3V for microprocessors

Package Types

Ordering Information

Name Description

Vin Input supply voltage

Output Switching output

Gnd Ground

Feedback Output voltage feedback

ON/OFF ON/OFF shutdown

Active is “Low” or floating

P: TO220-5L

Output Versions

AD: Adjustable Output

3.3: Fixed Output 3.3V

5.0: Fixed Output 5V