MAX1508, MAX1508Y, MAX1508Z Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFN

Description

The MAX1508 is an intelligent, stand-alone constant-current, constant-voltage (CCCV), thermally regulated linear charger for a single-cell lithium-ion (Li+) battery. The MAX1508 integrates the current-sense circuit, MOS pass element, and thermal-regulation circuitry, and also eliminates the reverse-blocking Schottky diode, to create the simplest and smallest charging solution for hand-held equipment.

The MAX1508 functions as a stand-alone charger to control the charging sequence from the prequalification state through fast-charge, top-off charge, and full-charge indication. The MAX1508Y and MAX1508Z eliminate the prequalification state to allow startup into a load without a battery.

Proprietary thermal-regulation circuitry limits the die temperature to +100°C when fast charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC.

The MAX1508 achieves high flexibility by providing an adjustable fast-charge current by an external resistor. Other features include the charging status (active-low CHG) of the battery, an active-low control input (active-low EN) for the MAX1508 and MAX1508Z (active-high control input for the MAX1508Y), and an active-low input power-source detection output (active-low ACOK).

The MAX1508 accepts a +4.25V to +13V supply, but disables charging when the input voltage exceeds +7V to protect against unqualified or faulty AC adapters. The MAX1508 operates over the extended temperature range (-40°C to +85°C) and is available in a compact 8-pin thermally enhanced 3mm x 3mm thin DFN package with 0.8mm height.

Key Features

Applications/Uses

Stand-Alone Linear 1-Cell Li+ Battery Charger
No External FET, Reverse-Blocking Diode, or Current-Sense Resistor Required
Programmable Fast-Charge Current (0.8A max)
Proprietary Die-Temperature Regulation Control (+100°C)
+4.25V to +13V Input Voltage Range with Input Overvoltage Protection (OVP) Above +7V
Charge-Current Monitor for Fuel Gauging
Low Dropout Voltage—130mV at 0.425A
Input Power-Source Detection Output (active-low ACOK)
Soft-Start Limits Inrush Current
No Prequalification State for the MAX1508Y and MAX1508Z
Charge Status Output (CHG-bar) for LED or Microprocessor Interface
Small 3mm x 3mm 8-Pin Thin DFN Package, 0.8mm High
Active-Low Charge Enable (EN-bar) (MAX1508 and MAX1508Z)
Active-High Charge Enable (EN) (MAX1508Y)

	Bluetooth® Equipment
	Cell Phones/Cordless Phones
	Charging Cradles and Docks
	Digital Cameras and MP3 Players
	PDAs
	USB Appliances

Key Specifications: Battery Chargers

Part Number

Cell Chemistry

Number of Lithium-Ion cells

Protected V_IN (max) (V)

Charging V_IN (max) (V)

Internal FET/Transistor

Charger (V)

Charge Rate Set by

Max. Charge Current (A)

Charge Termination

Charge Regulation

Features

EV-Kit

Package

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

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX1508

Li-Ion
Li-Polymer

Yes

4.2

Resistor

0.8

External Control

Linear

•	Stand Alone

•	Thermal Die Regulation

Yes

THIN QFN (Dual)/8

Yes

-40 to +85

$1.88 @ 1k

See All Battery Chargers (60)

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.

Reliability Reports


		Show FIT data for:

		Reliability Report: MAX1508ETA.pdf

		Request Reliability Report for:

Ordering Information

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-12 of 12

MAX1508

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1508ETA+T

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1508ETA+

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1508ETA

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1508ETA-T

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1508Y

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1508YETA

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1508YETA+

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1508YETA+T

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1508YETA-T

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1508Z

Free
Sample

Buy

Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1508ZETA+

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1508ZETA

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1508ZETA+T

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1508ZETA-T

THIN QFN (Dual);8 pin;10 mm²
Dwg: 21-0137I (PDF)
Use pkgcode/variation: T833-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

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