MAX1508ZETA+T ,Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFNELECTRICAL CHARACTERISTICS(V = 5V, V = 4.0V, ACOK = EN = CHG = unconnected (for the MAX1508 and MAX ..
MAX150AEWP ,CMOS High Speed 8Bit A/D Converter with Refrence and Track/Hold FunctionApplications
Digital Signal Processing
High Speed Data Acquisition
Telecommunications
High ..
MAX150AEWP ,CMOS High Speed 8Bit A/D Converter with Refrence and Track/Hold FunctionFeatures
. Fast Conversion Time: 1.34ps Max.
. Built-in Track-and-Hold Function
. No Adjustment ..
MAX150AEWP ,CMOS High Speed 8Bit A/D Converter with Refrence and Track/Hold FunctionGeneral Description
The MAX150/MX7820 is a high speed, microprocessor
compatible, 8 bit analog ..
MAX150BCPP ,CMOS High Speed 8Bit A/D Converter with Refrence and Track/Hold FunctionELECTRICAL CHARACTERISTICS
(VDD = +5V, VREF+ = HN,1/rur- = GND, RD-MODE, TA = TMIN to TMAX, unle ..
MAX150BEPP ,CMOS High Speed 8Bit A/D Converter with Refrence and Track/Hold FunctionFeatures
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. Built-in Track-and-Hold Function
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MAX414BESD ,Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op AmpsApplications MAX410C/D 0°C to +70°C Dice'
Low-Noise Frequency Synthesizers MAX410EPA -40''C to +85 ..
MAX414CSD ,Quad, 28MHz, low-noise, low-voltage, precision op amp.Applications MAX410C/D 0°C to +70°C Dice'
Low-Noise Frequency Synthesizers MAX410EPA -40''C to +85 ..
MAX414EPD ,Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op AmpsELECTRICAL CHARACTERISTICS
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PARA ..
MAX414ESD ,Single/Dual/Quad, 28MHz, Low-Noise, Low-Voltage, Precision Op Amps19-4194; Rev 2,' 1 1/96
lVI/JXI/VI
Single/DuaI/Quad, 28MHz, Low-Noise,
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MAX4158ESA ,350MHz/250MHz / 2-Channel Video Multiplexer-AmplifiersApplicationsMAX4258ESA -40°C to +85°C 8 SOVideo-Signal MultiplexingMAX4258EUA -40°C to +85°C 8 µMAX ..
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MAX1508ETA+-MAX1508ETA+T-MAX1508ZETA+T
Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFN
General DescriptionThe 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
FeaturesStand-Alone Linear 1-Cell Li+ Battery ChargerNo External FET, Reverse-Blocking Diode, or
Current-Sense Resistor RequiredProgrammable 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 +7VCharge-Current Monitor for Fuel GaugingLow Dropout Voltage—130mV at 0.425AInput Power-Source Detection Output (ACOK)Soft-Start Limits Inrush CurrentNo Prequalification State for the MAX1508Y and
MAX1508ZCharge Status Output (CHG) for LED or
Microprocessor InterfaceSmall 3mm x 3mm 8-Pin Thin DFN Package,
0.8mm HighActive-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 ACOKin 3mm x 3mm TDFNACOK
EN (EN)
ISET2
CHGBATT
GND
3mm x 3mm THIN DFNTOP VIEW4
MAX1508
MAX1508Y
MAX1508Z765
( ) ARE FOR THE MAX1508Y ONLY
Pin Configuration
Ordering Information
PARTTEMP RANGEPIN-PACKAGETOP
MARKMAX1508ETA-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
EVALUATION KIT
AVAILABLEBluetooth is a trademark of Ericsson.
*EP = Exposed paddle.
+Denotes lead-free package.
Ordering Information continued at end of data sheet.
Typical OperatingCircuit appears at end of data sheet.
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and ACOKin 3mm x 3mm TDFN
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VIN= 5V, VBATT= 4.0V, ACOK= EN= CHG= unconnected (for the MAX1508 and MAX1508Z), EN = VL (for the MAX1508Y), RISET
= 2.8kΩto GND, CVL= 0.47µF, BATT bypassed to GND with 1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at= +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, CHGto GND.....................................................-0.3V to +14V
VL, BATT, ISET, EN, EN, ACOKto GND..................-0.3V to +6V
VL to IN...................................................................-14V to +0.3V
IN to BATT Continuous Current.............................................0.9A
Continuous Power Dissipation (TA= +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
PARAMETERCONDITIONSMINTYPMAXUNITSInput Voltage Range013V
Input Operating Range4.256.50V
VIN - VBATT, VIN rising204060ACOK Trip Point, INVIN - VBATT, VIN falling153045mV
VIN rising6.577.5Overvoltage Lockout Trip PointVIN hysteresis0.11V
Charging (IIN - IBATT)12
Disabled, EN = VL (MAX1508/MAX1508Z),
EN = GND (MAX1508Y)0.81.5IN Input Current
OFF state (VIN = VBATT = 4.0V)0.065
VL Output VoltageIVL = 100µA3.3V
VL Load RegulationIVL = 100µA to 2mA-71-200mV
VL Temperature CoefficientIVL = 100µA-2mV/°C
VIN rising2.95VL Undervoltage Lockout Trip PointHysteresis0.17V
VIN = 0 to 4V310
BATT Input CurrentEN = VL (MAX1508/MAX1508Z), EN = GND
(MAX1508Y)410µA
Maximum RMS Charge Current0.8A
TA = 0°C to +85°C4.1624.24.238Battery Regulation VoltageIBATT = 0TA = -40°C to +85°C4.1504.24.250V
BATT Removal Detection ThresholdVBATT rising4.44.674.9V
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET
Thermal Regulation, and ACOKin 3mm x 3mm TDFN
Note 1:Limits are 100% production tested at TA= +25°C. Limits over operating temperature range areguaranteed through correla-
tion using statistical quality control (SQC) methods.
ELECTRICAL CHARACTERISTICS (continued)(VIN= 5V, VBATT= 4.0V, ACOK= EN= CHG= unconnected (for the MAX1508 and MAX1508Z), EN = VL (for the MAX1508Y,) RISET
= 2.8kΩto GND, CVL= 0.47µF, BATT bypassed to GND with 1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at= +25°C.)(Note 1)
PARAMETERCONDITIONSMINTYPMAXUNITSBATT Removal Detection-Threshold Hysteresis200mV
Minimum BATT Bypass Capacitance1µF/A
Fast-Charge Current-Loop System AccuracyVBATT = 3.5V478520562mA
Precharge Current System AccuracyPercentage of the fast-charge current,
VBATT = 2.2V (MAX1508 only)51015%
Die-Temperature-Regulation Set Point100°C
VBATT Precharge Threshold VoltageVBATT rising (MAX1508 only)2.32.52.7V
Current-Sense Amplifier Gain, ISET to IBATT in
Fast-Charge ModeIBATT = 500mA, VISET = 1.4V0.8800.9581.035mA/A
Regulator Dropout Voltage (VIN - VBATT )VBATT = 4.1V, IBATT = 425mA130200mV
EN or EN Logic Input Low Voltage4.25V < VIN < 6.5V0.52V
EN or EN Logic Input High Voltage4.25V < VIN < 6.5V1.3V
EN or EN Internal Pulldown Resistor(MAX1508 and MAX1508Z only)100200400kΩ
CHG Output Low CurrentV CHG = 1V51220mA
TA = +25°C1CHG Output High Leakage CurrentV CHG = 13VTA = +85°C0.002µA
ACOK Output Low VoltageIACOK = 0.5mA0.4V
TA = +25°C1ACOK Output High Leakage CurrentV ACOK = 5.5VTA = +85°C0.002µA
Full-Battery Detection Current Threshold
(as a Percentage of the Fast-Charge Current)IBATT falling51015%
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and ACOKin 3mm x 3mm TDFN
Typical Operating Characteristics(VIN= 5V, VBATT= 4.0V, ACOK= EN= CHG= unconnected, EN = VL (MAX1508Y), RISET= 2.8kΩto GND, CIN= 1µF, CBATT=
1µF, CVL= 0.47µF, TA= +25°C, unless otherwise noted.)
SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1508 toc01
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)68241012
IBATT = 0
DISABLED-MODE SUPPLY
CURRENT vs. INPUT VOLTAGE
MAX1508 toc02
INPUT VOLTAGE (V)
DISABLED-MODE SUPPLY CURRENT (mA)68421012
EN = VL (MAX1508/1508Z)
EN = GND (MAX1508Y)
CHARGE CURRENT
vs. BATTERY VOLTAGE
MAX1508 toc03
BATTERY VOLTAGE (V)
CHARGE CURRENT (mA)
CHARGE CURRENT
vs. INPUT VOLTAGE
MAX1508 toc04
INPUT VOLTAGE (V)
CHARGE CURRENT (mA)
CHARGE CURRENT
vs. INPUT-VOLTAGE HEADROOM
MAX1508 toc05
VIN - VBATT (V)
CHARGE CURRENT (mA)
BATTERY REGULATION VOLTAGE
vs. TEMPERATURE
MAX1508 toc06
TEMPERATURE (°C)
BATTERY REGULATION VOLTAGE (V)
CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX1508 toc07
AMBIENT TEMPERATURE (°C)
CHARGE CURRENT (mA)
CHARGE CURRENT
vs. AMBIENT TEMPERATURE
MAX1508 toc09
AMBIENT TEMPERATURE (°C)
CHARGE CURRENT (mA)
VBATT = 4.0V
VBATT = 3.6V
RISET = 1.87kΩ
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET
Thermal Regulation, and ACOKin 3mm x 3mm TDFN
Detailed DescriptionThe MAX1508 charger uses voltage, current, and ther-
mal-control loops to charge a single Li+ cell and to pro-
tect the battery (Figure 1). When a Li+ battery with a cell
voltage below 2.5V is inserted, the MAX1508 charger
enters the prequalification stage where it precharges that
cell with 10% of the user-programmed fast-charge cur-
rent. There is no prequalification stage for the MAX1508Z
and MAX1508Y in order to allow startup into a load with-
out a battery. The CHGindicator output is driven low
(Figure 2) to indicate entry into the prequalification state.
Once the cell has passed 2.5V, the charger soft-starts
before it enters the fast-charge stage. The fast-charge
current level is programmed through a resistor from ISET
to ground. As the battery voltage approaches 4.2V, the
charging current is reduced. If the battery current drops
to less than 10% of the fast-charging current, the CHG
indicator goes high impedance, signaling the battery is
fully charged. At this point the MAX1508 enters a con-
stant voltage-regulation mode to maintain the battery at
full charge. If, at any point while charging the battery, the
die temperature approaches +100°C, the MAX1508
reduces the charging current so the die temperature
does not exceed the temperature-regulation set point.
The thermal-regulation loop limits the MAX1508 die
temperature to +100°C by reducing the charge current
as necessary (see the Thermal Regulationsection).
This feature not only protects the MAX1508 from over-
heating, but also allows higher charge current without
risking damage to the system.
MAX1508/MAX1508ZENCharger
Enable Inputis a logic input (active low) to enable the charger.
Drive ENlow, leave floating, or connect to GND to
enable the charger control circuitry. Drive ENhigh to
disable the charger control circuitry. ENhas a 200kΩ
internal pulldown resistance.
MAX1508Y EN Charger Enable InputEN is a logic input (active high) to enable the charger.
Drive EN high to enable the charger control circuitry.
Drive EN low to disable the charger control circuitry.
ACOKOutputActive-Low Output. The open-drain ACOKoutput
asserts low when +4.25V < VIN< +7V and VIN- VBATT
> 40mV. ACOKrequires an external 100kΩpullup
resistor to the system’s logic I/O voltage. ACOKis high
impedance in shutdown.
VL Internal Voltage RegulatorThe MAX1508 linear charger contains an internal linear
regulator available on the VL output pin. VL requires a
0.47µF ceramic bypass capacitor to GND. VL is regulat-
ed to 3.3V whenever the input voltage is above 3.5V.
PINNAMEFUNCTION1VLInternally Generated Logic Supply for Chip. Bypass VL to GND with a 0.47µF capacitor.
2INInput Supply Voltage. Bypass IN to GND with a 1µF capacitor to improve line noise and transient rejection.GNDGround. Connect GND and exposed pad to a large copper trace for maximum power dissipation.ISET
Charge-Current Program and Fast-Charge Current Monitor. Output current from ISET is 0.958mA per amp of
battery charging current. The charging current is set by connecting a resistor from ISET to GND. Fast-charge
current = 1461V / RISETΩ.Logic-Level Enable Input (MAX1508/1508Z). Drive EN high to disable charger. Pull EN low or float for normal
operation. EN has an internal 200kΩ pulldown resistor.5Logic-Level Enable Input (MAX1508Y). Drive EN low to disable charger. Drive EN high for normal operation.ACOKInput Power-Detection Output. The open-drain ACOK output asserts low when +4.25V < VIN < +7V and VIN -
VBATT > 40mV. ACOK requires an external 100kΩ pullup resistor. ACOK is high impedance in shutdown.BATTLi+ Battery Connection. Bypass BATT to GND with a capacitor of at least 1µF per ampere of charge current.CHG
Charging Indicator, Open-Drain Output. CHG goes low (and can turn on an LED) when charging begins.
CHG is high impedance when the battery current drops below 10% of the fast-charging current, or when EN
is high. Connect a pullup resistor to the µP’s I/O voltage when interfacing with a µP logic input.PADExposed Pad. Connect exposed pad to a large copper trace for maximum power dissipation. The pad is
internally connected to GND.
Pin Description
MAX1508/MAX1508Y/MAX1508Z
Linear Li+ Battery Charger with Integrated Pass FET,
Thermal Regulation, and ACOKin 3mm x 3mm TDFNMAX1508
OUTPUT DRIVER,
CURRENT SENSE,
AND LOGIC
VLUVLO
VINOVLO
INOK
REFOK
VLOK
REFOK
REF
LOGIC
TEMPERATURE
SENSOR
VREF
IREF
ISET
0.47μF
BATT
EN (EN)
200kΩ
GND
100°C
BATT
CHG
ACOK
VI/O
MAX1508 AND
MAX1508Z ONLY
( ) ARE FOR MAX1508Y ONLY
CHGCharge Indicator OutputCHGis an open-drain current source for indicating
charge status. Table 1 describes the state of CHGdur-
ing different stages of operation.
CHGis a nominal 12mA current source suitable for dri-
ving a charge-indication LED. If the MAX1508 is used
in conjunction with a microprocessor, a pullup resistor
to the logic I/O voltage allows CHGto indicate charge
status to the µP instead of driving an LED.
Soft-StartAn analog soft-start algorithm activates when entering
fast-charge mode. When the prequalification state is
complete (VBATTexceeds +2.5V), the charging current
ramps up in 3ms to the full charging current. This
reduces the inrush current on the input supply.Since
the MAX1508Y and MAX1508Z do not have a prequali-
fication state, they automatically enter soft-start upon
activation.
Figure 1. Functional Diagram
