MAX8819C Maxim Integrated Products, MAX8819C Datasheet

MAX8819C

Manufacturer Part Number

MAX8819C

Description

PMIC

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8819C.pdf (29 pages)

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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.

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.

19-4166; Rev 1; 4/09

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

* EP = Exposed pad.

Smart Power Selector is a trademark of Maxim Integrated

Products, Inc.

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.

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*

PART

MP3 Players

Portable GPS Devices

Low-Power Handheld Products

Cellular Telephones

Digital Cameras

Handheld Instrumentation

PDAs

PMIC with Integrated Chargers and Smart

TEMP RANGE

________________________________________________________________ Maxim Integrated Products

Ordering Information

Power Selector in a 4mm x 4mm TQFN

General Description

PIN-

PACKAGE

Applications

VOLTAGE

SYS

4.35

5.3

(V)

o Smart Power Selector

o Operates with No Battery Present

o USB/AC Adapter One-Cell Li+ Charger

o Three 2MHz Step-Down Converters

o 2 to 6 Series WLED Driver with Dimming Control

o Active-Low REG1 Reset Output

o Short-Circuit/Thermal-Overload/Input

o Power-Up/Down Sequencing (MAX8819C)

o Total Solution Size: Less Than 90mm

Pin Configuration appears at end of data sheet.

SYS

Undervoltage/Overvoltage Protection

ENABLE BACKLIGHT

ENABLE CHARGER

95% Peak Efficiency

100% Duty Cycle

±3% Output Accuracy over Load/Line/

ENABLE SYSTEM

USB/AC-TO-DC

Temperature

ADAPTER

Typical Operating Circuit

DLIM1

DLIM2

EN123

CEN

EN4

LX4

OVP4

FB4

MAX8819_

CISET

RST1

CHG

SYS

LX2

LX3

BAT

LX1

CHG

RST1

Li+/Li-Poly

BATTERY

Features

OUT3

CORE

OUT2

MEMORY

OUT1

I/O

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