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Integrated voltage regulator delivers 97.5% efficiency

Mon, 08/12/2013 - 3:09pm

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International Rectifier introduced the IR3823 SupIRBuck integrated voltage regulator designed for space-constrained, energy efficient netcom, server and storage applications.

The IR3823 delivers up to 3A with superior efficiency in an ultra-compact 3.5x3.5mm package. Efficiencies in excess of 97.5% are obtainable for designs converting power from a 6V input to a 4.8V output. The extremely high initial efficiency allows switching at up to 1.5MHz from a 12V supply to enable a complete 3A power supply solution in less than 130mm2. Featuring constant frequency and virtually jitter-free operation with synchronization capability, the new device is well suited to noise-sensitive applications, while the higher bandwidth reduces component count to shrink PCB footprint. A tri-level selectable soft-start feature is also offered for ease of sequencing.

The IR3823 features programmable switching frequency from 300kHz to 1.5MHz. Other key functions include thermally compensated over-current protection, output over-voltage protection and thermal shutdown.

Specifications

Part Number

Package

Circuit

Vin

Vout

Iout

Switching Frequency

IR3823

PQFN

3.5x3.5mm

Single Output

5V-21V (self biased)

1V-21V with ext 5V bias

0.6V-86%Vin

3A

300-1,500kHz

 

Reference Design

Featured Part

VIN Range (V)

VOUT Range (V)

IOUT(A)

Switching Frequency (kHz)

IRDC3823

IR3823M

12V

1.2V

3A

600

 

Design Tools

Datasheets are posted on the International Rectifier website at www.irf.com.

A user friendly, interactive, web-based tool is available at http://mypower.irf.com/SupIRBuck and enables the rapid selection and simulation of selected SupIRBuck products. A SupIRBuck Excel spreadsheet design tool and Icepak thermal model are also available.

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