Datasheet > MAX8680ETL+T

MAX8680ETL+T

更新时间： 2024-01-06 00:52:23

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
2页	151K
描述
Switching Regulator/Controller,

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MAX8680ETL+T 技术参数

是否Rohs认证：	符合	生命周期：	Active
包装说明：	,	Reach Compliance Code：	compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
Factory Lead Time：	17 weeks	风险等级：	5.75
Base Number Matches：	1

MAX8680ETL+T 数据手册

ABRIDGED

19-0681; Rev 2; 11/07

Smallest, All-Internal MOSFET, 7-Channel

DSC PMIC in Tiny 5mm x 5mm Thin QFN

MAX680

General Description

Features

♦ 95% Efficient Synchronous-Rectified DC-DC

The MAX8680 highly efficient complete power-supply

solution is designed for digital still cameras (DSCs) and

digital video cameras (DVCs). The device integrates

seven on-chip power MOSFET DC-DC converters with

up to 95% efficiency to power all critical power supplies

in DSC systems. Each converter also features True

Shutdown™, as well as internal compensation to mini-

mize external component count. The seven DC-DC

converter outputs are:

Converters

♦ 90% Efficient Boost-Buck Operation

♦ 85% Efficient DC-DC Converters for CCD, LCD,

WLED, and/or OLED

♦ Internal Compensation on All Channels

♦ True Shutdown on All Step-Up Converters

♦ Overload Protection

•

Step-up synchronous-rectified DC-DC converter

(SU). The MAX8680 is bootstrapped from V

♦ Soft-Start for Controlled Startup Current

♦ Dropout Operation (100% Duty Cycle) on Step-

MAIN synchronous-rectified step-down DC-DC con-

verter (M) for DSP I/O supply voltage.

Down Converters

♦ Regulated Current Output for Up to 6 White LEDs

♦ PWM Dimming of WLED Current

♦ Adjustable LED Overvoltage Protection Up to 27V

♦ Transformerless Inverting Converter for CCD

DDRZ synchronous-rectified step-down DC-DC

converter (Z) for DSP DDR supply voltage.

Low-voltage (down to 1V) synchronous-rectified

step-down DC-DC converter (SD) for DSP core sup-

ply voltage.

♦ 2MHz Switching Frequency for Low-Voltage

Channels

•

High-voltage, step-up DC-DC converter with current

regulation and PWM dimming control (LEDBST) for

white LEDs (WLED).

♦

2ꢀ5% Switching Frequency Accuracy

♦ 1µA Shutdown Supply Current

♦ Power-On Voltage Tracking for Core and Main

•

High-voltage step-up DC-DC converter (CCDBST)

for CCD imagers or positive LCD bias supplies.

Outputs

♦ All Internal Power MOSFETs

♦ SDOK Power-OK Indicator

Transformerless inverting DC-DC converter (CCDINV)

for CCD imagers or negative LCD bias supplies.

The MAX8680 has an independent/simultaneous

power-on sequence of the CCDBST and CCDINV con-

verters. For a preset power-on sequence of CCDBST

before CCDINV, contact the factory.

Typical Operating Circuit

INPUT

2.7V TO 5.5V

SU STEP-UP

The MAX8680 operates with 1-cell lithium-ion (Li+) bat-

tery, two-AA cell, or dual-battery designs and is avail-

able in a 5mm x 5mm, 40-pin thin QFN package. The

MAX8680 operates over the -40°C to +85°C extended

temperature range.

BATT

ONSU

ONM

MAIN STEP-DOWN

3.3V

2.5V

MAIN

1.8V

SD STEP-DOWN

Applications

DDRZ

DDRZ STEP-DOWN

ONSD

ONZ

DSCs and DVCs

PDAs and Portable Media Players

GPS Navigation Systems

MAX8680

SDOK

LEDBST

CCDBST

CCDINV

UP TO 6 WLEDs

+15V

LEDBST

ONLED

ONBST

ONINV

Ordering Information

CCDBST

TEMP

PKG

PART

PIN-PACKAGE

-7.5V

RANGE

CODE

CCDINV

-40°C to 40 Thin QFN-EP*

+85°C 5mm x 5mm x 0.8mm

MAX8680ETL+

T4055-2

Pin Configuration appears at the end of data sheetꢀ

+Denotes a lead-free package.

*EP= Exposed paddle.

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

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at wwwꢀmaxim-icꢀcomꢀ

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与MAX8680ETL+T相关器件

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