MAX1508 Maxim, MAX1508 Datasheet
MAX1508
Manufacturer Part Number
MAX1508
Description
Linear Li Battery Charger with Integrated Pass FET / Thermal Regulation / and ACOKin 3mm x 3mm TDFN
Manufacturer
Maxim
Datasheet
1.MAX1508.pdf
(11 pages)
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The MAX1508 is an intelligent, stand-alone constant-cur-
rent, 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 elimi-
nates 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 elimi-
nate 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 maxi-
mum 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 (CHG) of the
battery, an active-low control input (EN) for the
MAX1508 and MAX1508Z (active-high control input for
the MAX1508Y), and an active-low input power-source
detection output (ACOK).
The MAX1508 accepts a +4.25V to +13V supply, but dis-
ables 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 pack-
age with 0.8mm height.
19-2890; Rev 1; 10/03
Typical Operating Circuit appears at end of data sheet.
Bluetooth is a trademark of Ericsson.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Thermal Regulation, and ACOK in 3mm x 3mm TDFN
Linear Li+ Battery Charger with Integrated Pass FET,
Cellular and Cordless Phones
PDAs
Digital Cameras and MP3 Players
USB Appliances
Charging Cradles and Docks
Bluetooth™ Equipment
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o Stand-Alone Linear 1-Cell Li+ Battery Charger
o No External FET, Reverse-Blocking Diode, or
o Programmable Fast-Charge Current (0.8A max)
o Proprietary Die-Temperature Regulation Control
o +4.25V to +13V Input Voltage Range with Input
o Charge-Current Monitor for Fuel Gauging
o Low Dropout Voltage—130mV at 0.425A
o Input Power-Source Detection Output (ACOK)
o Soft-Start Limits Inrush Current
o No Prequalification State for the MAX1508Y and
o Charge Status Output (CHG) for LED or
o Small 3mm x 3mm 8-Pin Thin DFN Package,
o Active-Low Charge Enable (EN) (MAX1508 and
o Active-High Charge Enable (EN) (MAX1508Y)
*EP = Exposed paddle.
MAX1508ETA
MAX1508YETA
MAX1508ZETA
Current-Sense Resistor Required
(+100°C)
Overvoltage Protection (OVP) Above +7V
MAX1508Z
Microprocessor Interface
0.8mm High
MAX1508Z)
TOP VIEW
( ) ARE FOR THE MAX1508Y ONLY
PART
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
3mm x 3mm THIN DFN
Ordering Information
8
1
MAX1508Y
MAX1508Z
MAX1508
7
2
Pin Configuration
6
3
PIN-PACKAGE
8 Thin DFN-EP*
8 Thin DFN-EP*
8 Thin DFN-EP*
4
5
Features
MARK
TOP
AHF
AIK
AIL
1
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