Datasheet > CDH2D09

CDH2D09

更新时间： 2022-05-17 05:06:10

品牌	Logo	应用领域
美信 - MAXIM		集成电源管理电路手持设备
页数	文件大小	规格书
44页	829K
描述
PMIC with Integrated Charger and Smart Power Selector for Handheld Devices

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CDH2D09 数据手册

19-0885; Rev 0; 8/07

PMIC with Integrated Charger and

Smart Power Selector for Handheld Devices

MA8671X

General Description

Features

The MAX8671X integrated power-management IC

(PMIC) is ideal for use in portable media players and

other handheld devices. In addition to five regulated

output voltages, the MAX8671X integrates a 1-cell lithi-

um ion (Li+) or lithium polymer (Li-Poly) charger and

Smart Power Selector™ with dual (AC-to-DC adapter

and USB) power inputs. The dual-input Smart Power

Selector supports end products with dual or single

power connectors. All power switches for charging and

switching the system load between battery and external

power are included on-chip. No external MOSFETs are

required.

♦ 16V-Tolerant USB and DC Inputs

♦ Automatically Powers from External Power or

Battery

♦ Operates with No Battery Present

♦ Single-Cell Li+/Li-Poly Charger

♦ Three 2MHz Step-Down Regulators

Up to 96% Efficiency

♦ Two Low I Linear Regulators

♦ Output Power-Up Sequencing

♦ Thermal-Overload Protection

Maxim’s Smart Power Selector makes the best use of

limited USB or AC-to-DC adapter power. Battery

charge current and input current limit are independent-

ly set. Input power not used by the system charges the

battery. Charge current and DC current limit are pro-

grammable up to 1A while USB input current can be set

to 100mA or 500mA. Automatic input selection switches

the system load from battery to external power. Other

features include overvoltage protection, charge status

and fault outputs, power-OK monitors, charge timer,

and battery thermistor monitor. In addition, on-chip

thermal limiting reduces battery charge rate to prevent

charger overheating.

Ordering Information

PKG

CODE

PART

TEMP RANGE PIN-PACKAGE

40 Thin QFN-EP*

5mm x 5mm

MAX8671XETL+ -40°C to +85°C

T4055-1

+Denotes a lead-free package.

*EP = Exposed paddle.

Simplified Applications Circuit

The MAX8671X offers adjustable voltages for all out-

puts. Similar parts with factory-preset output voltages

are also available (contact factory for availability).

MAX8671X

SYS

AC-TO-DC

ADAPTER

Applications

Portable Audio Players

GPS Portable Navigators

USB

Li+/LiPo

BATTERY

OFF

OUT1

1V TO V

425mA

OUT1

OUT2

OUT3

SYS

PWM

OUT2

1V TO V

425mA

PEN1

PEN2

USUS

CEN

OUT3

1V TO V

425mA

μP

OUT4

0.6V TO V

180mA

CST1

CST2

DOK

OUT4

OUT5

SYS

UOK

OUT5

0.6V TO V

SYS

180mA

Smart Power Selector 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 www.maxim-ic.com.

12 3 4 5 6 7...44

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