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MAX1507 Datasheet

  • MAX1507

  • Linear Li+ Battery Charger with Integrated Pass FET and Ther...

  • Maxim   Maxim

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19-2899; Rev 1; 11/03
KIT
ATION
EVALU
E
BL
AVAILA
Linear Li+ Battery Charger with Integrated Pass FET
and Thermal Regulation in 3mm x 3mm Thin DFN
General Description
The MAX1507 is an intelligent, stand-alone constant-cur-
rent, constant-voltage (CCCV), thermally regulated linear
charger for a single-cell lithium-ion (Li+) battery. The
MAX1507 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 MAX1507 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.
Proprietary thermal-regulation circuitry limits the die
temperature when fast charging or while exposed to
high ambient temperatures, allowing maximum charg-
ing current without damaging the IC.
The MAX1507 achieves high flexibility by providing an
adjustable fast-charge current and thermal regulation
setpoints. Other features include the charging status
(CHG) of the battery and an active-low control input (EN).
The MAX1507 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
MAX1507 operates over the extended temperature
range (-40擄C to +85擄C) and is available in a compact
8-pin thermally enhanced 3mm x 3mm Thin DFN pack-
age with 0.8mm height.
Features
o
Stand-Alone Linear 1-Cell Li+ Battery Charger
o
No External FET, Reverse-Blocking Diode, or
Current-Sense Resistor Required
o
Programmable Fast-Charge Current (0.8A max)
o
Proprietary Programmable Die-Temperature
Regulation Control (+90擄C, +100擄C, and +130擄C)
o
+4.25V to +13V Input Voltage Range with Input
Overvoltage Protection (OVP) Above +7V
o
Charge-Current Monitor for Fuel Gauging
o
Low Dropout Voltage鈥?30mV at 0.425A
o
Input Power-Source Detection Output (VL) and
Charge-Enable Input (EN)
o
Soft-Start Limits Inrush Current
o
Charge Status Output (CHG) for LED or
Microprocessor Interface
o
Small 3mm x 3mm 8-Pin Thin DFN Package,
0.8mm High
MAX1507
Ordering Information
PART
MAX1507ETA
TEMP RANGE
-40擄C to +85擄C
PIN-PACKAGE
8 Thin DFN-EP*
TOP
MARK
AGW
Applications
Cellular and Cordless Phones
PDAs
Digital Cameras and MP3 Players
USB Appliances
Charging Cradles and Docks
Bluetooth鈩?Equipment
*EP
= Exposed paddle.
Typical Operating Circuit
INPUT
4.25V TO 13V
IN
1碌F
BATT
Pin Configuration
BATT
CHG
8
7
6
EN
TOP VIEW
TEMP
1碌F
Li+
4.2V
5
MAX1507
CHG
ISET
TEMP
GND
MAX1507
OFF
EN
ON
2.80k鈩?/div>
1
VL
2
IN
3
GND
4
ISET
VL
0.47碌F
3mm x 3mm THIN DFN
Bluetooth is a trademark of Ericsson.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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