IR3553 International Rectifier, IR3553 Datasheet

IR3553

Manufacturer Part Number

IR3553

Description

40A Integrated PowIRstage

Manufacturer

International Rectifier

Datasheet

1.IR3553.pdf (1 pages)

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FEATURES

APPLICATIONS

BASIC APPLICATION

 Peak efficiency up to 93.8% at 1.2V

 Integrated driver, control MOSFET, synchronous

 Input voltage (VIN) operating range up to 15V

 Output voltage range from 0.25V up to 3.3V

 Output current capability of 40A

 Operation up to 1.0MHz

 Integrated current sense amplifier

 VCC under voltage lockout

 Thermal flag

 Body‐Braking™ load transient support

 Diode‐emulation high efficiency mode

 Compatible with 3.3V PWM logic and VCC tolerant

 Compliant with Intel DrMOS V4.0

 PCB footprint compatible with IR3550 – IR3551

 Efficient dual sided cooling

 Small 4mm x 6 mm x 0.9mm PQFN package

 Lead‐free RoHS compliant package

 High frequency, low profile DC‐DC converters

 Voltage Regulators for CPUs, GPUs, and DDR

MOSFET and Schottky diode

memory arrays

Figure 1: IR3553 Basic Application Circuit

June 30

, 2011 | PRELIMINARY DATASHEET | V2.12

40A Integrated PowIRstage

DESCRIPTION

The IR3553 integrated PowIRstage™ is a synchronous buck

gate driver IC with co‐packed control and synchronous

MOSFETs and Schottky diode. It is optimized internally for

PCB layout, heat transfer and driver/MOSFET timing.

Custom designed gate driver and MOSFET combination

enables higher efficiency at lower output voltages required

by cutting edge CPU, GPU and DDR memory designs.

Up to 1.0MHz switching frequency enables high

performance transient response, allowing miniaturization

of output inductors, as well as input and output capacitors

while maintaining industry leading efficiency. The IR3553’s

superior efficiency enables smallest size and lower solution

cost. The IR3553 PCB footprint is compatible with IR3550

(60A), and the IR3551 (50A).

Integrated current sense amplifier achieves superior

current sense accuracy vs. best‐in‐class controller based

Inductor DCR sense methods.

The IR3553 incorporates the Body‐Braking™ feature which

enables reduction of output capacitors and is activated

quickly. Synchronous diode‐emulation mode in the IR3553

removes the zero‐current detection and control burden

from the PWM controller and increases system efficiency.

The IR3553 is optimized specifically for CPU core power

delivery in server applications. The ability to meet the

stringent requirements of the server market also makes

the IR3553 ideally suited to powering GPU and DDR

memory designs.

100

Figure 2: IR3553 Efficiency and Power Loss

Output Current (A)

IR3553

Datasheet pdf - http://www.DataSheet4U.net/

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