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TD2576 Datasheet Preview

TD2576 Datasheet

3A 52KHz PWM Buck DC/DC Converter

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T  echcode®
 
 
 
3A 52KHz PWM Buck DC/DC Converter
DATASHEET
TD2576
General Description 
Features   
The TD2576 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 output version.
Both versions are capable of driving a 3A load with
excellent line and load regulation.
Requiring a minimum number of external components,
these regulators are simple to use 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 switch and
an over temperature shutdown for complete protection
under fault conditions.
The TD2576 is available in TO-220B-5L TO220-5L and
TO-263-5L packages.
 
z 3.3V, 5V and adjustable output versions
z Output adjustable from 1.23v to 43V
z Fixed 52KHz frequency internal oscillator
z Guaranteed 3A output load current
z Input voltage range up to 45V
z Low power standby mode, IQ typically 80 µA
z TTL shutdown capability
z Excellent line and load regulation
z Requires only 4 external components
z High efficiency
z Thermal shutdown and current limit protection
z Available in TO-220B/TO220 and TO-263 packages
Applications 
z Simple High-efficiency step-down regulator
z On-card switching regulators
z Positive to negative converter
z LCD monitor and LCD TV
z DVD recorder and PDP TV
z Battery charger
z Step-down to 3.3V for microprocessors
Package Types 
  
 
 
  
 
 
        TO220B­5L                  TO220­5L                  TO263­5L 
 
 
Figure 1. Package Types of TD2576 
December,  20,  2005.                                                        Techcode  Semiconductor  Limited                                                  www.techcodesemi.com 
1 




Techcode

TD2576 Datasheet Preview

TD2576 Datasheet

3A 52KHz PWM Buck DC/DC Converter

No Preview Available !

T  echcode®
 
 
 
3A 52KHz PWM Buck DC/DC Converter
Pin Configurations 
DATASHEET
TD2576
Pin Description 
 
 
Figure 2 Pin Configuration of TD2576 (Top View) 
Pin Number Pin Name Description
1
2
3
4
5
 
 
Vin
Output
GND
FB
ON/OFF
Input supply voltage
Switching output
Ground
Output voltage feedback
ON/OFF shutdown
Active is “Low” or floating
 
 
December,  20,  2005.                                                        Techcode  Semiconductor  Limited                                                  www.techcodesemi.com 
2 


Part Number TD2576
Description 3A 52KHz PWM Buck DC/DC Converter
Maker Techcode
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