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MAX1508ETA+T

P1-P3P4-P6P7-P9P10-P11
General Description
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 con-
trol the charging sequence from the prequalification state
through fast-charge, top-off charge, and full-charge indi-
cation. The MAX1508Y and MAX1508Z eliminate the pre-
qualification 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.
Applications
Cellular and Cordless Phones
PDAs
Digital Cameras and MP3 Players
USB Appliances
Charging Cradles and Docks
Bluetooth™ Equipment
Features
♦ 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 (ACOK)
♦ Soft-Start Limits Inrush Current
♦ No Prequalification State for the MAX1508Y and
MAX1508Z
♦ Charge Status Output (CHG) for LED or
Microprocessor Interface
♦ Small 3mm x 3mm 8-Pin Thin DFN Package,
0.8mm High
♦ Active-Low Charge Enable (EN) (MAX1508 and
MAX1508Z)
♦ Active-High Charge Enable (EN) (MAX1508Y)
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and
ACOK
in 3mm x 3mm TDFN
________________________________________________________________ Maxim Integrated Products 1
ACOK
EN (EN)
ISET
1
2
CHG
BATT
IN
GND
VL
3mm x 3mm THIN DFN
TOP VIEW
3
4
MAX1508
MAX1508Y
MAX1508Z
8
76
5
( ) ARE FOR THE MAX1508Y ONLY
+
Pin Configuration
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
TOP
MARK
MAX1508ETA-T
-40°C to +85°C8 Thin DFN-EP*
AHF
MAX1508ETA+T
-40°C to +85°C8 Thin DFN-EP*
AHF
19-2890; Rev 2; 8/05
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.
EVALUATION KIT
AVAILABLE
Bluetooth is a trademark of Ericsson.
*EP = Exposed paddle.
+Denotes lead-free package.
Ordering Information continued at end of data sheet.
Typical Operating Circuit appears at end of data sheet.
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and
ACOK
in 3mm x 3mm TDFN
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 5V, V
BATT
= 4.0V, ACOK = EN = CHG = unconnected (for the MAX1508 and MAX1508Z), EN = VL (for the MAX1508Y), R
ISET
= 2.8kΩ to GND, C
VL
= 0.47µF, BATT bypassed to GND with 1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, CHG to GND.....................................................-0.3V to +14V
VL, BATT, ISET, EN, EN, ACOK to GND ..................-0.3V to +6V
VL to IN...................................................................-14V to +0.3V
IN to BATT Continuous Current.............................................0.9A
Continuous Power Dissipation (T
A
= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C) .........1951mW
Short-Circuit Duration.................................................Continuous
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER CONDITIONS
TYP
MAX
UNITS
Input Voltage Range 013V
Input Operating Range
4.25 6.50
V
V
IN
- V
BATT
, V
IN
rising 20 40 60
ACOK Trip Point, IN
V
IN
- V
BATT
, V
IN
falling 15 30 45
mV
V
IN
rising 6.5 7 7.5
Overvoltage Lockout Trip Point
V
IN
hysteresis
0.11
V
Charging (I
IN
- I
BATT
)12
Disabled, EN = VL (MAX1508/MAX1508Z),
EN = GND (MAX1508Y)
0.8 1.5
IN Input Current
OFF state (V
IN
= V
BATT
= 4.0V)
0.065
mA
VL Output Voltage I
VL
= 100µA 3.3 V
VL Load Regulation I
VL
= 100µA to 2mA -71
-200
mV
VL Temperature Coefficient I
VL
= 100µA -2
mV/°C
V
IN
rising
2.95
VL Undervoltage Lockout Trip Point
Hysteresis
0.17
V
V
IN
= 0 to 4V 3 10
BATT Input Current
EN = VL (MAX1508/MAX1508Z), EN = GND
(MAX1508Y)
410
µA
Maximum RMS Charge Current 0.8 A
T
A
= 0°C to +85°C
4.162
4.2
4.238
Battery Regulation Voltage I
BATT
= 0
T
A
= -40°C to +85°C
4.150
4.2
4.250
V
BATT Removal Detection Threshold V
BATT
rising 4.4
4.67
4.9 V
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and
ACOK
in 3mm x 3mm TDFN
_______________________________________________________________________________________ 3
Note 1: Limits are 100% production tested at T
A
= +25°C. Limits over operating temperature range are guaranteed through correla-
tion using statistical quality control (SQC) methods.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 5V, V
BATT
= 4.0V, ACOK = EN = CHG = unconnected (for the MAX1508 and MAX1508Z), EN = VL (for the MAX1508Y,) R
ISET
= 2.8kΩ to GND, C
VL
= 0.47µF, BATT bypassed to GND with 1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 1)
PARAMETER CONDITIONS
TYP
MAX
UNITS
BATT Removal Detection-Threshold Hysteresis 200
mV
Minimum BATT Bypass Capacitance 1
µF/A
Fast-Charge Current-Loop System Accuracy V
BATT
= 3.5V
478 520
562 mA
Precharge Current System Accuracy
Percentage of the fast-charge current,
V
BATT
= 2.2V (MAX1508 only)
51015%
Die-Temperature-Regulation Set Point
100
°C
V
BATT
Precharge Threshold Voltage V
BATT
rising (MAX1508 only) 2.3 2.5 2.7 V
Current-Sense Amplifier Gain, I
SET
to I
BATT
in
Fast-Charge Mode
I
BATT
= 500mA, V
ISET
= 1.4V
0.880 0.958 1.035
mA/A
Regulator Dropout Voltage (V
IN
- V
BATT
)V
BATT
= 4.1V, I
BATT
= 425mA
130
200 mV
EN or EN Logic Input Low Voltage 4.25V < V
IN
< 6.5V
0.52
V
EN or EN Logic Input High Voltage 4.25V < V
IN
< 6.5V 1.3 V
EN or EN Internal Pulldown Resistor (MAX1508 and MAX1508Z only)
100 200
400 kΩ
CHG Output Low Current V
CHG
= 1V 5 12 20 mA
T
A
= +25°C 1
CHG Output High Leakage Current V
CHG
= 13V
T
A
= +85°C
0.002
µA
ACOK Output Low Voltage I
ACOK
= 0.5mA 0.4 V
T
A
= +25°C 1
ACOK Output High Leakage Current V
ACOK
= 5.5V
T
A
= +85°C
0.002
µA
Full-Battery Detection Current Threshold
(as a Percentage of the Fast-Charge Current)
I
BATT
falling 5 10 15 %
P1-P3P4-P6P7-P9P10-P11

MAX1508ETA+T

Mfr. #:
Buy MAX1508ETA+T
Manufacturer:
Maxim Integrated
Description:
Battery Management Linear Li+ Battery Charger
Lifecycle:
New from this manufacturer.
Delivery:
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