QuickView - MAX8819, MAX8819A, MAX8819B, MAX8819C PMIC with Integrated Charger and Smart Power Selector™ in a 4mm x 4mm TQFN

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Description

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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) charger, 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 independently 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.

Key Features

Applications/Uses

Smart Power Selector
Operates with No Battery Present
USB/AC Adapter One-Cell Li+ Charger
Three 2MHz Step-Down Converters
- 95% Peak Efficiency
- 100% Duty Cycle
- ±3% Output Accuracy over Load/Line/Temperature
2 to 6 Series WLED Driver with Dimming Control
Active-Low REG1 Reset Output
Short-Circuit/Thermal-Overload/Input Undervoltage/Overvoltage Protection
Power-Up/Down Sequencing (MAX8819C)
Total Solution Size: Less Than 90mm²

	Cellular Telephones
	Digital Cameras
	Handheld Instrumentation
	Low-Power Handheld Products
	MP3 Players
	PDAs
	Portable GPS Devices

Key Specifications: Battery Chargers

Part Number

Cell Chemistry

Number of Lithium-Ion cells

Protected V_IN (max) (V)

Charging V_IN (max) (V)

Charge Rate Set by

Max. Charge Current (A)

Charge Termination

Charge Regulation

Features

EV-Kit

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX8819

Li-Ion
Li-Polymer

5.5

Logic Input
Resistor

Min. Charge Current
Timer

Linear

•	Input Current Limit

•	Internal FET/Transistor

•	Smart Power Selector

•	Thermal Die Regulation

•

Timer

•

USB Input

Yes

TQFN/28

-40 to +85

$3.65 @ 1k

See All Battery Chargers (62)

Key Specifications: Multifunction PMICs

Part Number

Primary Topology

Monitor/Control Features

DC-DC/Power Features

LCD/LED/Flash/CCD Features

Battery Charger Features

Interface Type

V_IN (min) (V)

V_IN (max) (V)

Min. V_OUT (V)

Max. V_OUT (V)

I_OUT (A)

Operating Freq. (kHz)

Package

Smallest Available Package (max w/pins) (mm²)

Price^**

MAX8819

Step-Down

Output OVP
Shutdown

Current Limit
Fixed Freq./PWM
Internal Pwr. FETs
Soft Start
Sync. Rectifier

White LED

Battery Charger
Charge Timer
Input Current Limit
Smart Pwr. Selector
Thermal Die Regulation
Thermistor Input
USB Input

GPIO

4.1

5.5

0.5

2000

TQFN/28

$3.65 @ 1k

See All Multifunction PMICs (79)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.