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EN5335QI

3A Voltage Mode Synchronous Buck PWM DC-DC Converter with Integrated Inductor 3-Pin Programmable Output

Enpirion, Inc. 

EN5335QI

3A Voltage Mode Synchronous Buck PWM

DC-DC Converter with Integrated Inductor

3-Pin Programmable Output

Description

The EN5335QI is a Power System on a Chip

(PowerSoC). It is specifically designed to meet

the precise voltage and fast transient

requirements of present and future high-

performance, low-power processor, DSP, FPGA,

memory boards and system level applications in

a distributed power architecture. Advanced circuit

techniques, ultra high switching frequency, and

very advanced, high-density, integrated circuit

and proprietary inductor technology deliver high-

quality, ultra compact, non-isolated DC-DC

conversion. Operating this converter requires as

few as three external components that include

small value input and output ceramic capacitors

and a soft-start capacitor.

The Enpirion solution significantly helps in

system design and productivity by offering greatly

simplified board design, layout and

manufacturing requirements. In addition, a

reduction in the number of vendors required for

the complete power solution helps to enable an

overall system cost savings.

All Enpirion products are RoHS compliant and

lead-free manufacturing environment compatible.

Typical Application Circuit

VIN

22μF

PVIN

VS0

AVIN

VS1

VS2

VID Output

Voltage Select

Features

• Integrated INDUCTOR, MOSFETS, Controller

• Footprint 1/3rd that of competing solutions.

• Low Part Count: only 3 MLC Capacitors.

• Up to 10W continuous output power.

• 5MHz operating frequency.

• High efficiency, up to 93%.

• VOUT accuracy 3% over line, load and temp.

• Wide input voltage range of 2.375V to 5.5V.

• 3-pin VID output voltage select to choose one

of 7 pre-programmed voltage levels.

• Output enable pin and Power OK signal.

• Programmable soft-start time.

• Programmable over-current protection.

• Thermal shutdown, short circuit, and UVLO

• RoHS compliant, MSL level 3, 260C reflow.

Applications

• Point of load regulation for low-power

processors, network processors, DSPs,

FPGAs, and ASICs

• Notebook computers, servers, workstations

• Broadband, networking, LAN/WAN, optical

• Low voltage, distributed power architectures

with 2.5V, 3.3V or 5V rails

• DSL, STB, DVR, DTV, iPC

• Ripple sensitive applications

POK

VSENSE

SS

VOUT

VOUT Ordering Information

15nF

AGND PGND

47μF

Part Number

EN5335QI

EN5335QI-E

Temp Rating

(°C)

Package

-40 to +85

44-pin QFN T&R

QFN Evaluation Board

Figure 1. Simple Layout.

00846

1

9/18/2009

www.enpirion.com

Rev:C

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