MAX8607 データシートの表示（PDF） - Maxim Integrated

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MAX8607

1MHz PWM Boost Converter for 1.5A White LED Camera Flash

Maxim Integrated 

19-3783; Rev 1; 2/07

EVAALVUAAILTAIOBNLEKIT

1MHz PWM Boost Converter for 1.5A

White LED Camera Flash

General Description

The MAX8607 white LED boost converter is optimized

for camera flash/strobe applications using high-current

white LEDs. The MAX8607 integrates a 1MHz PWM

boost converter, 1.5A low-dropout (LDO) current regu-

lator, and logic control circuitry for a space-saving LED

flash design. Two logic inputs control four modes of

operation: shutdown mode reduces the quiescent cur-

rent to 0.1µA (typ), movie mode supplies up to 360mA

of LED current for continuous lighting, flash mode sup-

plies up to 1.5A of LED current for short-duration light-

ing during an exposure, and disco mode supplies +5V

(at up to 1A) to external circuits while driving the LED

with a fixed 80mA current.

The internal 1MHz boost converter features an adaptive

control scheme with an internal switching MOSFET and

synchronous rectifier to improve efficiency and mini-

mize external component count. The MAX8607 is avail-

able in a 14-pin, 3mm x 3mm TDFN package (0.8mm

max height).

Applications

Camera Flashes/Strobes

Cell Phones/Smartphones

PDAs and Digital Cameras

Pin Configuration

Features

♦ Supports Lumileds and Other High-Power

White LEDs

♦ Independently Set Flash/Movie Currents

Flash-Mode Current Up to 1.5A

Movie-Mode Current Up to 360mA

♦ Disco Mode with Fixed 5V (Up to 1A) and 80mA

LED Current

♦ 84% Efficiency (PLED / PBATT) at 1.1A

♦ TA Derating Function for LED Thermal Protection

♦ Output Overvoltage Protection (OVP)

♦ Soft-Start Eliminates Inrush Current

♦ 1MHz PWM Operation at All Loads

♦ Small External Components

♦ 2.7V to 5.5V Input Voltage Range

♦ 0.1µA Shutdown Mode

♦ 14-Pin, 3mm x 3mm TDFN Package

Ordering Information

PART*

PIN-PACKAGE

TOP MARK

MAX8607ETD+

14 TDFN 3mm x 3mm

(T1433-1)

ABA

+Indicates lead-free package.

*The MAX8607ETD is characterized over the -40°C to +85°C

temperature range.

Typical Operating Circuit

TOP VIEW

14 13 12 11 10 9 8

MAX8607

+

1234567

TDFN

3mm x 3mm

INPUT

2.7V TO 5.5V 2.2µH

10µF

MODE-

SELECT

INPUTS

LX MAX8607 OUT

PGND

OUTS

LGND

COMP

GND

OUTPUT

10µF

UP TO 1.5A FLASH

UP TO 360mA MOVIE

EN1

EN2

FLSH

LED

MOV

________________________________________________________________ Maxim Integrated Products 1

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.

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