LM2575G中文资料40V, 1.0A, 52kHz, STEP-DOWN SWITCHING REGULATOR数据手册HTC Korea规格书

描述 Description

The LM2575G series of regulators are monolithic integratedcircuits ideally suited for easy and convenient design of astep-down switching regualtor(buck converter).All circuits of this series are capable of driving a 1A loadwith excellent line and load regulation. These devices areavailable in fixed output voltages of 3.3V, 5.0V, 12Vand an adjustable output version.
These regulatiors were designed to minimize the number of externalcomponents to simplify thepower supply design. Standard series of inductors optimized for use with the LM2575G are offeredby several different inductor manufacturers.
Since the LM2575G converter is a switch-mode power supply, its efficiency is significantly higher incomparison with popular three-terminal limear reguators, especially with higher input voltages.
In many cases, the power dissipated is so low that no heatsink is required or its size couldbe reduced dramatically. A standard series of inductors optimized for use with the LM2575G are available from several different manufacturers.
This feature greatly simplifies the design ofswitch-mode power supplies. The LM2575G features include a guaranteed ±4% toleranceon output voltage within specified input voltages and output load conditions, and ±10% on theoscillator frequency (±2% over 0°C to 125°'C).
External shutdown is included, featuring 80u (typical) standby current. The output switch includescycle-bycycle current limiting, as well as thermal shutdown for full protection under fault conditions.

特性 Features

- 3.3V, 5.0V, 12V and Adjustable Output Versions
- Adjustable Version Output Voltage Range, 1.23 to 37V
- ±4% Maximum Over Line and Load Conditions
- Guaranteed 1A Output Current
- Wide Input Voltage Range
- Requires Only 4 External Components
- 52kHz Fixed Frequency Internal Oscillator
- TTL Shutdown Capability, Low Power Standby Mode
- High Efficiency
- Uses Readily Available Standard Inductors
- Thermal Shutdown and Current Limit Protection
- Moisture Sensitivity Level 3