MAX8819A

更新时间： 2024-10-01 11:14:31

品牌	Logo	应用领域
美信 - MAXIM		集成电源管理电路
页数	文件大小	规格书
29页	447K
描述
PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN

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MAX8819A 数据手册

19-4166; Rev 1; 4/09

PMIC with Integrated Chargers and Smart

Power Selector in a 4mm x 4mm TQFN

B/MAX819C

General Description

Features

o Smart Power Selector

The MAX8819_ is a complete power solution for MP3

players and other handheld applications. The IC

includes a battery charger, step-down converters, and

WLED power. It features an input current-limit switch to

power the IC from an AC-to-DC adapter or USB port, a

1-cell lithium ion (Li+) or lithium polymer (Li-Poly) charg-

er, three step-down converters, and a step-up converter

with serial step dimming for powering two to six white

LEDs. All power switches for charging and switching the

system load between battery and external power are

included on-chip. No external MOSFETs are required.

The MAX8819C offers a sequenced power-up/power-

down of OUT1, OUT2, and then OUT3.

o Operates with No Battery Present

o USB/AC Adapter One-Cell Li+ Charger

o Three 2MHz Step-Down Converters

95% Peak Efficiency

100% Duty Cycle

±±% Output Accuracy over Load/Line/

Temperature

o 2 to 6 Series WLED Driver with Dimming Control

o Active-Low REG1 Reset Output

o Short-Circuit/Thermal-Overload/Input

Undervoltage/Overvoltage Protection

Maxim’s Smart Power Selector™ makes the best use of

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

charge current and input current limit are independent-

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

battery. Charge current is resistor programmable and

the input current limit can be selected as 100mA,

500mA, or 1A. Automatic input selection switches the

system load from battery to external power. In addition,

on-chip thermal limiting reduces the battery charge rate

to prevent charger overheating.

o Power-Up/Down Sequencing (MAX8819C)

o Total Solution Size: Less Than 90mm²

Typical Operating Circuit

USB/AC-TO-DC

ADAPTER

SYS

BAT

Applications

DLIM1

DLIM2

MP3 Players

Portable GPS Devices

Low-Power Handheld Products

Cellular Telephones

Digital Cameras

Li+/Li-Poly

BATTERY

ENABLE SYSTEM

ENABLE CHARGER

ENABLE BACKLIGHT

EN123

CEN

OUT1

I/O

LX1

EN4

LX4

Handheld Instrumentation

PDAs

MAX8819_

SYS

OVP4

OUT2

MEMORY

LX2

LX3

Ordering Information

SYS

VOLTAGE

(V)

OUT3

CORE

PIN-

PACKAGE

PART

TEMP RANGE

CISET

CHG

MAX8819AETI+ -40°C to +85°C 28 TQFN-EP*

MAX8819BETI+ -40°C to +85°C 28 TQFN-EP*

MAX8819CETI+ -40°C to +85°C 28 TQFN-EP*

4.35

5.3

CHG

FB4

4.35

RST1

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Smart Power Selector is a trademark of Maxim Integrated

Products, Inc.

Pin Configuration appears at end of data sheet.

________________________________________________________________ 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...29

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与MAX8819A相关器件

型号	品牌	获取价格	描述	数据表
MAX8819AETI+	MAXIM	获取价格	PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN
MAX8819AETI+T	MAXIM	获取价格	Power Management Circuit, PQCC28,
MAX8819B	MAXIM	获取价格	PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN
MAX8819BETI+	MAXIM	获取价格	PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN
MAX8819BETI+T	MAXIM	获取价格	Power Management Circuit, PQCC28
MAX8819C	MAXIM	获取价格	PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN
MAX8819CETI+	MAXIM	获取价格	PMIC with Integrated Chargers and Smart Power Selector in a 4mm x 4mm TQFN
MAX8819CETI+T	MAXIM	获取价格	Power Management Circuit, PQCC28,
MAX8819DETI+	MAXIM	获取价格	Power Supply Management Circuit, Adjustable, 3 Channel, 4 X 4 MM, ROHS COMPLIANT, TQFN-28
MAX881R	MAXIM	获取价格	Low-Noise Bias Supply in レMAX with Power-OK f

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