MAX1501 Highly Integrated, Linear Battery Charger with Thermal Regulation for Portable Applications

Description

The MAX1501 intelligent, constant-current, constantvoltage (CCCV), temperature-regulated battery charger charges a single lithium-ion (Li+) cell or three-cell NiMH/NiCd batteries. The device integrates the currentsense resistor, PMOS pass element, and thermalregulation circuitry, while eliminating the reverseblocking Schottky diode to create the simplest charging solution for hand-held equipment.

The MAX1501 functions as a stand-alone charger to control the charging sequence from the prequalification state through fast charge, top-off, and charge termination for single-cell Li+ or three-cell NiMH/NiCd batteries. Alternatively, the MAX1501 collaborates with a host microprocessor to determine the best charging algorithm. Proprietary thermal-regulation circuitry limits the die temperature when fast charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the charger. The MAX1501 continually supplies a regulated output voltage under no-battery conditions, allowing battery changing.

The device achieves high flexibility by providing an adjustable fast-charge current, top-off current, safety timer (disabled in the MAX1501Z), and thermal-regulation setpoint. Other features include input power detection (ACOK-bar) and input under-/overvoltage protection. The MAX1501 provides active-low control inputs.

The MAX1501 accepts a 4.5V to 13V supply, but disables charging when the input voltage exceeds 6.5V, preventing excessive power dissipation. The MAX1501 operates over the extended temperature range (-40°C to +85°C) and is available in a compact 16-pin thermally enhanced 5mm x 5mm thin QFN package with 0.8mm profile.

Key Features

Applications/Uses

Stand-Alone or Microprocessor-Controlled (µP) Linear 1-Cell Li+ or 3-Cell NiMH/NiCd Battery Charger
No FET, Reverse-Blocking Diode, or Current- Sense Resistor Required
1.4A (max) Programmable Fast-Charge Current
+95°C, +115°C, and +135°C Proprietary Programmable Die Temperature Regulation Control
4.5V to 13V Input Voltage Range with Input Overvoltage (OVLO) Protection Above 6.5V
Programmable Top-Off Current Threshold: 10%, 20%, or 30% of the Fast-Charge Current
Charge-Current Monitor for Fuel Gauging
Programmable Safety Timer (3, 4.5, or 6 hours)
Input Power Detection Output (active-low ACOK)and Charge Enable Input (active-low CHGEN)
Automatic Recharge
Digital Soft-Start Limits Inrush Current
Charge Status Outputs for LEDs or µP Interface

	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 NiMH or NiCd cells

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^**

MAX1501

Li-Ion
Li-Polymer
NiCd
NiMH

6.25

Resistor

1.4

Timer

Linear

•	Stand Alone

•	Thermal Die Regulation

•

Timer

Yes

TQFN/16

-40 to +85

$2.05 @ 1k

See All Battery Chargers (62)

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.

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: 1-8 of 8

MAX1501

Free
Sample

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Package:	TYPE PINS FOOTPRINT
	DRAWING CODE/VAR *

Temp

RoHS/Lead-Free?
Materials Analysis

MAX1501ETE

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1501ETE-T

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1501ZETE

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1501ZETE-T

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655-2*

-40°C to +85°C

RoHS/Lead-Free: No
Materials Analysis

MAX1501ETE+

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1501ETE+T

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1501ZETE+

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

MAX1501ZETE+T

TQFN;16 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0072 (PDF)
Use pkgcode/variation: T1655+2*

-40°C to +85°C

RoHS/Lead-Free: Lead Free
Materials Analysis

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