LM2574中文资料40V, 0.5A, 52kHz, STEP-DOWN SWITCHING REGULATOR数据手册HTC Korea规格书

描述 Description

The LM2574 series are monolithic ICs designed for a step-down DC/DC converter, capable of driving 0.5A load without an additional transistor.
It saves a board space. The external shutdown function is controlled by a logic level and then the circuit comes into the standby mode.
The internal compensation makes the feedback control with good line and load regulation characteristics without an external design.
Regarding the protection functions - the thermal shutdown prevents circuit damage during the over temperature operation and the current limit is against overcurrent operation of the output switch.Other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency.External shutdown is included, featuring 50 uA (typical) standby current.
The fixed output voltage version includes 3.3V, 5V, 12V devices, while the adjustable version voltages range from 1.23V to 37V. The LM2574 is available in DIP-8 and SOP-14 package.

特性 Features

- 3.3V, 5.0V, 12V and Adjustable Output Versions
- Adjustable Version Output Voltage Range
- Wide Input Voltage Range
- Guaranteed 0.5A Output Current
- 52kHz Fixed Frequency Internal Oscillator
- Voltage mode non-synchronous PWM control
- On/Off shutdown control input
- Thermal Shutdown and Current Limit Protection
- Moisture Sensitivity Level 3 for SMD packages