TECHNICAL DATA

1.0 A, 15 V, Step-Down

IL2575-xx

Switching Regulator

The IL2575 series of regulators are monolithic integrated

circuits ideally suited for easy and convenient design of a step–

down switching regulator (buck converter). All circuits of this series

are capable of driving a 1.0 A load with excellent line and load

regulation. These devices are available in fixed output voltages of

3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version.

These regulators were designed to minimize the number of

external components to simplify the power supply design. Standard

series of inductors optimized for use with the IL2575 are offered by

several different inductor manufacturers. Since the IL2575

converter is a switch–mode power supply, its efficiency is

significantly higher in comparison with popular three–terminal

linear regulators, especially with higher input voltages. In many

cases, the power dissipated is so low that no heatsink is required

or its size could be reduced dramatically.

ORDERING INFORMATION

IL2575Q

TO-220-5L

IL2575S

TO-220-5L

IL2575D2

TO-263-5L

TO-220-5L

TO-263-5L

TO-220-5L

A standard series of inductors optimized for use with the

IL2575 are available from several different manufacturers. This

feature greatly simplifies the design of switch–mode power

supplies. The IL2575 features include a guaranteed ±4% tolerance

on output voltage within specified input voltages and output load

conditions, and ±10% on the oscillator frequency (±2% over 0°C to

125°C). External shutdown is included, featuring 80 ㎂ (typical)

standby current. The output switch includes cycle–by–cycle current

limiting, as well as thermal shutdown for full protection under fault

conditions.

Pin connections

1. Vin

2. Output

3. Ground

4. Feedback

5. ON/OFF

Features

• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions

• Adjustable Version Output Voltage Range, 1.23 to 37 V ±4%

Maximum Over Line and Load Conditions

• Guaranteed 1.0 A Output Current

• Wide Input Voltage Range

• Requires Only 4 External Components

• 52 kHz Fixed Frequency Internal Oscillator

• TTL Shutdown Capability, Low Power Standby Mode

• High Efficiency

• Uses Readily Available Standard Inductors

• Thermal Shutdown and Current Limit Protection

Applications

• Simple High–Efficiency Step–Down (Buck) Regulator

• Efficient Pre–Regulator for Linear Regulators

• On–Card Switching Regulators

• Positive to Negative Converter (Buck–Boost)

• Negative Step–Up Converters

• Power Supply for Battery Chargers

Rev. 00