TS2576

1-7

2003/12 rev. A

TS2576

3A Step Down Switching Voltage Regulator

Pin assignment:

1. Input

2. Output

3. Ground

4. Feedback

5. Enable

52KHz Oscillating Frequency

Output Current up to 3A

Enable Input Control

General Description

The TS2576 Series are step-down switching regulators with all required active functions. It is capable of driving 3A load

with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V, and an

adjustable output version.

The TS2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. Also it requires a

minimum number of external components. It substantially not only reduces the area of board size but also the size of heat

sink, and in some cases no heat sink is required. The ±4% tolerance on output voltage within specified input voltages and

output load conditions is guaranteed. Also, the oscillator frequency accuracy is within ±10%. External shutdown is

included. Featuring 70µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as

thermal shutdown for full protection under fault conditions.

This series are offered in 5-pin TO-263, TO-220 package.

Features

Guaranteed 3A output current

3.3V, 5V, and adjustable versions

Wide input voltage range, up to 40V

Internal oscillator of 52KHz fixed frequency

Wide adjust version output voltage range, from 1.23V

to 37V ±4% max. at over line and load conditions.

Low standby current, typ. 70µA, at shutdown mode

Requires only 4 external components

Thermal shutdown and current limit protection

P+ product enhancement tested

Ordering Information

12V, 5V and 3.3V. Leave blank for adjustable

version. Contact factory for additional voltage

options.

Part No.

Operating Temp.

(Ambient)

Package

TS2576CZ5

TO-220-5L

TS2576CM5

-20 ~ +85

TO-263-5L

Applications

LCD Monitors

ADD-ON Cards Switching Regulators

High Efficiency Step-Down Regulators

Efficient Pre-regulator for Linear Regulators

Positive to Negative converter (Buck-Boost)

Absolute Maximum Rating

Input Voltage

Vin

+45

V

ENABLE Pin Input Voltage

Vin (operate)

-0.3V ≤ V ≤ Vin

V

Power Dissipation

Internal Limited

W

Operating Junction Temperature Range

-0 ~ +150

Storage Temperature Range

-65 ~ +150

Lead Soldering Temperature (260

TO-220-5L / TO-263-5L Package

5

S