開關型降壓結構穩壓IC HY2596A

40V/3A 開關型降壓IC

HY2596A of regulators provides all the active functions for a step-down (buck) switching regulator, and drives 3A load with excellent line and load regulation. HY2596A is available in fixed output voltages of 5V and an adjustable output version.

Regulators are simple to use and require a minimum number of external components. Features include internal frequency compensation and a fixed-frequency oscillator.

The HY2596A is high-efficiency replacements for popular three-terminal linear regulators, and requiring a smaller heat-sink or even no heat-sink. HY2596A performs well with standard inductors from several manufacturers and simplifying the design of switch mode power supplies. HY2596A guarantees 4% tolerance on output voltage within specified input voltages and output load conditions and 15% on the oscillator frequency. External shut-down is included with typical 100uA (typical) standby current. The output switch has cycle-by-cycle current limiting as well as thermal shut-down for full protection under fault conditions

HY2596A operates at a switching frequency of 150 kHz thus allowing smaller size filter components than what would be needed with lower frequency switching regulators. Available in a 5-lead TO-263 surface mount package and power SOIC-8L package.

Features

5V, and adjustable output versions

Adjustable version output voltage range, 1.2V to 37V with ±4% max over line and load conditions

3A output load current

Input voltage range up to 40V

Requires only 4 external components

150 kHz fixed frequency internal oscillator

TTL shutdown capability

Low power standby mode, typically 100 uA.

High efficiency

Uses readily available standard inductors

Thermal shutdown and current limit protection

Applications