MAX8627 Maxim Integrated Products, MAX8627 Datasheet

MAX8627

Manufacturer Part Number

MAX8627

Description

Synchronous Boost Converter

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8627.pdf (14 pages)

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The MAX8627 step-up converter is a high-efficiency,

low-quiescent current, synchronous boost converter

with True Shutdown™ and inrush current limiting. The

MAX8627 generates any boosted output voltage from

3V to 5V from either a 2-cell NiMH/NiCd or a single-cell

Li+/Li polymer battery.

Quiescent current is only 20µA (typ), and at light loads

the converter pulses only as needed for best efficiency.

At higher loads, PWM mode maintains fixed 1MHz

operation for lowest noise and ripple.

The MAX8627 includes an internal soft-start to limit

inrush current to a maximum of 500mA. Additional fea-

tures include True Shutdown, internal compensation,

and adjustable current limit. The MAX8627 is available

in a tiny 3mm x 3mm TDFN package and is ideal for

use in handheld devices such as DSCs, PDAs, and

smartphones.

19-3995; Rev 0; 3/06

True Shutdown is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

INPUT BATTERY

2.5V TO 4.2V

OFF

DSC Motors and Backup Power

Microprocessor/DSP Core Power

Cellphones, PDAs, MP3 Players

Portable Handheld Devices

Typical Operating Circuit

4, 5

Low V

________________________________________________________________ Maxim Integrated Products

BATT

AGND

ILIM

GND

MAX8627

General Description

Boost Converter with True Shutdown

OUTS

PGND

POUT

10, 11

8, 9

6,7

BATT

Applications

, 20µA IQ, 1MHz Synchronous

UP TO 1A

3V TO 5V

OUTPUT

♦ 1MHz PWM Switching Frequency

♦ True Shutdown Output

♦ Up to 95% Efficiency

♦ 1.0A Guaranteed Output Current

♦ Soft-Start Eliminates Inrush Current

♦ 20µA (typ) Quiescent Current

♦ 0.1µA Logic-Controlled Shutdown

♦ Internal Synchronous Rectifier

♦ Internal Compensation

♦ Adjustable Current Limit

♦ Low-Noise Antiringing Feature

♦ Tiny 14-Pin, 3mm x 3mm, TDFN Package

Note: The device operates in the -40 ° C to +85 ° C extended oper-

ating temperature range.

*EP = Exposed pad.

+Denotes lead-free package.

MAX8627ETD+

TOP VIEW

PART

PIN-

PACKAGE

14 TDFN-EP*

3mm x 3mm

TDFN 3mm x 3mm

Ordering Information

MAX8627ETD +

Pin Configuration

T1433-2

CODE

PKG

Features

MARK

TOP

AAQ

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