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5J22N Rev. F001

3A 150KHz PWM Buck DC/DC Converter

EC9301A

Package Types

Figure 1. Package Types of EC9301A

General Description

The EC9301A 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 EC9301A is available in TO-220B-5L ,TO220-5L

and TO-263-5L packages.

Features



3.3V,5V and adjustable output Versions



Output adjustable from 1.23V to 43V



Fixed 150KHz frequency internal oscillator



Guaranteed 3A output load current



Input voltage range up to 45V





TTL shutdown capability



Excellent line and load regulation



Requires only 4 external components



High efficiency



Thermal shutdown and current limit protection



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

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