DC/DC step-down switching regulator, adj., 500 mA, 1.2 ... 37 Vo

SIMPLE SWITCHER® 150 KHz, 500mA Low Component Count Step-Down Regulator

Description
The LM2594xx series of regulators are monolithic integrated circuits that provide all theactive functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load withexcellent line and load regulation. These devices are available in fixed output voltages of 3.3 V,5 V, 12 V, and an adjustable output version, and are packaged in a 8-pin PDIP and a 8-pinsurface-mount SOIC package. Requiring a minimum number of external components, these regulators are simple to use andfeature internal frequency compensation, a fixed-frequency oscillator, and improved line and loadregulation specifications.

Features
- 3.3-V, 5-V, 12-V, and adjustable output versions
- Adjustable version output voltage range: 1.2 V to 37 V (57-V for the HV version), ±4% maximum over line and load conditions
- Available in 8-pin surface-mount SOIC and 8-pin PDIP packages
- Ensured 0.5-A output current
- Input voltage range up to 60 V
- Requires only four external components
- 150-kHz Fixed-frequency internal oscillator
- TTL shutdown capability
- Low power standby mode, IQ typically 85 µA
- High efficiency
- Uses readily-available standard inductors
- Thermal shutdown and current-limit protection

Applcations:
- Simple high-efficiency step-down (buck) regulator
- Efficient preregulator for linear regulators
- On-card switching regulators
- Positive-to-negative convertor