General Description

The EC9301H 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 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 EC9301H is available in TO263-5L packages.

Features

◆ 5V and adjustable output Versions
◆ Output adjustable from 1.23V to 57V
◆ Fixed 150KHz frequency internal oscillator
◆ Guaranteed 3A output load current
◆ Input voltage range up to 60V
◆ Low power standby mode, IQ typically 80 μA
◆ TTL shutdown capability
◆ Excellent line and load regulation
◆ Requires only 4 external components
◆ High efficiency
◆ Thermal shutdown and current limit protection
◆ Available in TO263 packages

Applications

◆ Simple High-efficiency step-down regulator
◆ On-card switching regulators
◆ Positive to negative converter
◆ LCD monitor and LCD TV
◆ DVD recorder and PDP TV
◆ Battery charger
◆ Step-down to 3.3V for microprocessors