EC2596 – 3A 150KHz PWM Buck DC/DC Converter

General description

The EC2596 is a series of easy to use fixed and adjustable step-down (buck) switch-mode voltage regulators. These devices are available in fixed output voltage of 3.3V, 5V, and an adjustable output version. Both versions are capable of driving a 3A load with excellent line and load regulation.

Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation, and a fixed-frequency oscillator.

The output voltage is guaranteed to ±3% tolerance under specified input voltage and output load conditions. The oscillator frequency is guaranteed to ±15%. External shutdown is included, featuring typically 80 μA standby current. Self protection features include a two stage frequency reducing current limit for the output switch and an over temperature shutdown for complete protection under fault conditions.

The EC2596 is available in TO-220B-5L ,TO220-5L and TO-263-5L packages.


l   3.3V,5V and adjustable output Versions

l   Output adjustable from 1.23V to 43V

l   Fixed 150KHz frequency internal oscillator

l   Guaranteed 3A output load current

l   Input voltage range up to 45V

l   Low power standby mode, IQ typically 80 μA

l   TTL shutdown capability

l   Excellent line and load regulation

l   Requires only 4 external components

l   High efficiency

l   Thermal shutdown and current limit protection

l   Available in TO-220B/TO220 and TO-263 packages


l   Simple High-efficiency step-down regulator

l   On-card switching regulators

l   Positive to negative converter

l   LCD monitor and LCD TV

l   DVD recorder and PDP TV

l   Battery charger

l   Step-down to 3.3V for microprocessors

Pin Configurations

Ordering info

Typical Applications circuit