Features

• Single 4.3 V to 17 V application or Wide Input Voltage Range from 2 V to 17 V with external VCC

• Precision Reference Voltage (0.6 V +/-0.5)

• Enhanced Fast COT engine stable with Ceramic Output Capacitors and No External Compensation

• Switching Frequency of 600 kHz with Forced Continuous Conduction Mode

• Enable input with Voltage Monitoring Capability & Power Good Output

• Monotonic Start-Up with 2 ms soft start time & Enhanced Pre-Bias Start up

• Thermally compensated Internal Over Current Protection with two Selectable Settings

• Thermal Shut Down

• Operating Junction Temp: -40 oC < Tj < 125 oC

• Small Size: 5 mm x 6 mm PQFN

• Halogen-free and RoHS2 Compliant with Exemption 7a

Potential applications

• Server Applications

• Storage Applications

• Telecom & Datacom Applications

• Distributed Point of Load Power Architectures

Product validation

Qualified for industrial applications according to the relevant tests of JEDEC47/20/22

Description

The IR3447A is an easy-to-use, fully integrated dc - dc Buck regulator. The onboard PWM controller and MOSFETs

with integrated bootstrap diode make IR3447A a small footprint solution, providing high-efficiency power

delivery. Furthermore, it uses a fast Constant On-Time (COT) control scheme, which simplifies design efforts and

provides fast control response.

The IR3447A has an internal low dropout voltage regulator, allowing operation with a single supply. It can also

operate with an external bias supply, extending the operating input voltage (PVIN) range. The IR3447A offers a

switching frequency of 600 kHz, two selectable current limits, soft start time of 2 ms, and Forced Continuous

Conduction Mode (FCCM).

It also features important protection functions, such as pre-bias start-up, thermally compensated current limits,

over voltage and under voltage protection, and thermal shutdown to give required system level security in the

event of fault conditions.