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19-3670; Rev 0; 4/05
KIT ATION EVALU BLE AVAILA
1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
General Description
The MAX8808X/MAX8808Y/MAX8808Z intelligent, stand-alone constant-current/constant-voltage (CCCV), thermally regulated linear chargers are designed for charging a single-cell lithium-ion (Li+) battery. The MAX8808X/MAX8808Y/MAX8808Z integrate the current-sense circuit, MOS pass element, and thermal-regulation circuitry, and eliminate the reverse-blocking Schottky diode to create the simplest and smallest charging solution for handheld equipment. The MAX8808X functions as a stand-alone charger to control the charging sequence from the prequalification state through fast-charge, top-off charge, and fullcharge indication. The MAX8808Y and MAX8808Z eliminate the prequalification state to allow startup into a load without a battery. 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 IC. The MAX8808X/MAX8808Y/MAX8808Z achieve high flexibility by providing an adjustable fast-charge current with an external resistor. Other features include a battery charging-status indicator (CHG), an active-low control input (EN) for the MAX8808X and MAX8808Z (active-high control input for the MAX8808Y), and an active-low input power-source detection output (ACOK). The MAX8808X/MAX8808Y/MAX8808Z accept a +4.25V to +15V supply, but disable charging when the input voltage exceeds +7V to protect against unqualified or faulty AC adapters. The MAX8808X/MAX8808Y/ MAX8808Z operate over the extended temperature range (-40C to +85C) and are available in a compact 8-pin thermally enhanced 2mm x 2mm TDFN package with 0.8mm (max) height.
Features
Stand-Alone Linear 1-Cell Li+ Battery Charger No External FET, Reverse Blocking Diode, or Current-Sense Resistor Required Programmable Fast-Charge Current (1A max) Proprietary Die Temperature Regulation Control (+115C) +4.25V to +15V Input Voltage Range with Input OVP Above +7V Charge-Current Monitor for Fuel Gauging Low Dropout Voltage--300mV at 500mA Input Power-Source Detection Output (ACOK) and Charge-Enable Input (EN or EN) Soft-Start Limits Inrush Current Charge-Status Output (CHG) for LED or Microprocessor (P) Interface Tiny 2mm x 2mm 8-Pin TDFN Package, 0.8mm (max) Height
MAX8808X/MAX8808Y/MAX8808Z
Ordering Information
PART PIN-PACKAGE TOP MARK AAC AAB AAA
MAX8808XETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) MAX8808YETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) MAX8808ZETA+ 8 TDFN-EP* 2mm x 2mm (T822-1)
All devices specified over the -40C to +85C operating range. +Denotes lead-free package. *EP = Exposed paddle.
Applications
Cellular and Cordless Phones Smartphones and PDAs Digital Still Cameras and MP3 Players USB Appliances Charging Cradles and Docks Bluetooth(R) Equipment
OFF ON 4.25V TO 15V
Typical Operating Circuit
IN BATT
CHG EN* ISET
MAX8808X MAX8808Y MAX8808Z
ACOK VL GND
4.2V Li+
Pin Configuration appears at end of data sheet.
Bluetooth is a registered trademark of Bluetooth SIG.
*MAX8808Y USES ACTIVE-HIGH LOGIC FOR EN.
________________________________________________________________ Maxim Integrated Products
1
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.
1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +16V VL, BATT, EN, ACOK, CHG to GND.........................-0.3V to +6V VL, ISET to GND .......................................................-0.3V to +4V VL to IN................................................................-16.3V to +0.3V IN to BATT Continuous Current.............................................1.5A Continuous Power Dissipation (TA = +70C) 8-Pin 2mm x 2mm TDFN (derate 15.4mW/C above +70C).............................................................1234mW BATT Short-Circuit Duration .......................................Continuous Operating Temperature Range ...........................-40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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.
ELECTRICAL CHARACTERISTICS
(VIN = 5V, VBATT = 4.0V, R ACOK = R CHG = 100k to 5V, EN = unconnected (for the MAX8808X and MAX8808Z), EN = VL (for the MAX8808Y), RISET = 2.8k to GND, CVL = 0.47F, CBATT = 1F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Input Voltage Range Input Operating Range ACOK Threshold Overvoltage-Lockout Trip Point IN Input Current VL Output Voltage VL Load Regulation VL Undervoltage-Lockout Trip Point BATT Input Current Maximum RMS Charge Current Battery Regulation Voltage Minimum BATT Bypass Capacitance Fast-Charge Current Loop System Accuracy VBATT = 3.5V TA = 0C to +85C 418 IBATT = 1mA VIN - VBATT, 10mV hysteresis (typ) VIN rising, 100mV hysteresis (typ) Charging (IIN - IBATT) Disabled OFF state (VIN = VBATT = 4.0V) IVL = 100A IVL = 100A to 2mA VVL rising, 100mV hysteresis (typ) VIN = 0 to 4V Disabled 1 4.162 4.200 2.2 465 512 4.238 3.0 -5 2.74 1 1 10 10 -30 VIN rising VIN falling CONDITIONS MIN 0 4.25 15 10 6.5 40 30 7 0.8 0.23 TYP MAX 15 6.50 60 45 7.5 2 0.50 0.065 V mV V A ARMS V F/A mA mA UNITS V V mV V
2
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 5V, VBATT = 4.0V, R ACOK = R CHG = 100k to 5V, EN = unconnected (for the MAX8808X and MAX8808Z), EN = VL (for the MAX8808Y), RISET = 2.8k to GND, CVL = 0.47F, CBATT = 1F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Prequal Charge Current Die Temperature Regulation Threshold VBATT Prequal Threshold Voltage Current-Sense Amplifier Gain, IBATT to IISET Regulator Dropout Voltage (VIN - VBATT ) EN/EN Logic Input Low Voltage EN/EN Logic Input High Voltage EN Internal Pulldown Resistor EN Input Leakage Current CHG Output Low Voltage CHG Output High Leakage Current ACOK Output Low Voltage ACOK Output High Leakage Current Full-Battery Detection Current Threshold VBATT rising, MAX8808X IBATT = 500mA, VISET = 1.4V VBATT = 4.1V, IBATT = 425mA 4.25V < VIN < 6.5V 4.25V < VIN < 6.5V MAX8808X and MAX8808Z only MAX8808Y, VEN = 5.5V I CHG = 5mA V CHG = 5.5V I ACOK = 5mA V ACOK = 5.5V TA = +25C TA = +85C 5 0.002 10 15 TA = +25C TA = +85C 0.002 0.4 1 TA = +25C TA = +85C 0.002 0.4 1 1.3 100 200 400 1 TA = 0C to +85C 2.3 0.97 CONDITIONS Percentage of the fast-charge current, VBATT = 2.2V, MAX8808X MIN 5 TYP 10 +115 2.5 1.08 250 2.7 1.19 430 0.52 MAX 15 UNITS % C V mA/A mV V V k A V A V A %
MAX8808X/MAX8808Y/MAX8808Z
IBATT falling, percentage of the fast-charge current
Note 1: Specifications are 100% production tested at TA = +25C. Limits over the operating temperature range are guaranteed by design and characterization.
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
Typical Operating Characteristics
(VIN = 5V, VBATT = 4.0V, ACOK = EN = unconnected, RISET = 2.8k to GND, CIN = 1F, CBATT = 1F, CVL = 0.47F, TA = +25C, unless otherwise noted.)
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX8808X/Y/Z toc01
DISABLED-MODE SUPPLY CURRENT vs. INPUT VOLTAGE
MAX8808X/Y/Z toc02
CHARGE CURRENT vs. BATTERY VOLTAGE
900 800 CHARGE CURRENT (mA) 700 600 500 400 300 200 MAX8808Y/ MAX8808Z MAX8808X
MAX8808X/Y/Z toc03
2.0 1.8 1.6 SUPPLY CURRENT (mA) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 12 14
800 700 SUPPLY CURRENT (A) 600 500 400 300 200 100 0 VEN = 5V OR VEN = 0V 0 2 4 6 8 10 12 14
1000
100 0 16 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VBATT (V)
16
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
CHARGE CURRENT vs. INPUT VOLTAGE
MAX8808X/Y/Z toc04
CHARGE CURRENT vs. INPUT VOLTAGE HEADROOM
900 800 CHARGE CURRENT (mA) 700 600 500 400 300 200 100 0
MAX8808X/Y/Z toc05
1000 900 800 CHARGE CURRENT (mA) 700 600 500 400 300 200 100 0 0 2 4 6 8 10 12
1000
14
0
50 100 150 200 250 300 350 400 450 500 (VIN - VBAT) (mV)
VIN (V)
BATTERY REGULATION VOLTAGE vs. AMBIENT TEMPERATURE
MAX8808X/Y/Z toc06
CHARGE CURRENT vs. AMBIENT TEMPERATURE
550 CHARGE CURRENT (mA) 500 450 400 350 300 250 VBATT = 3.2V VBATT = 4V
MAX8808X/Y/Z toc07
4.240 BATTERY REGULATION VOLTAGE (V) 4.230 4.220 4.210 4.200 4.190 4.180 4.170 4.160 4.150 -40 -15 10 TA (C) 35 60
600
85
200 -40 -15 10 TA (C) 35 60 85
4
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
Pin Description
PIN 1 2 3 NAME IN VL GND FUNCTION Input Supply Voltage. Bypass IN to GND with a 1F or larger ceramic capacitor to improve line noise and input transient rejection. Internally Generated Logic Supply for IC. Bypass VL to GND with a 0.47F ceramic capacitor. Ground. Connect GND and exposed pad to a large copper ground plane for maximum power dissipation. Connect GND to the exposed paddle directly under the IC. Charge-Current Program and Fast-Charge Current Monitor. Output current from ISET is 1.08mA per amp of battery charging current. Set the charging current by connecting a resistor from ISET to GND. Fast-charge current = 1302V / RISET. Charging Indicator. CHG is an open-drain output that goes low (LED capable) when charging begins. CHG is high impedance when the battery current drops below 10% of the fast-charging current, or when the IC is disabled. Connect a pullup resistor to the P's I/O voltage when interfacing with a P logic input. Logic-Level Enable Input. Drive EN high to disable charger. Pull EN low or leave unconnected for normal operation. EN has an internal 200k pulldown resistor. Logic-Level Enable Input. Drive EN low to disable charger. Pull EN high for normal operation. EN has no internal pullup or pulldown resistor. Input Status Indicator. ACOK is an open-drain output that asserts low when VIN < +7V and (VIN - VBATT) 40mV. ACOK requires an external 100k pullup resistor. ACOK is high impedance during shutdown. Li+ Battery Connection. Bypass BATT to GND with a ceramic capacitor of at least 2.2F per ampere of charge current. Exposed Paddle. Connect the exposed paddle to a large ground plane for maximum power dissipation. Connect GND to the exposed paddle directly under the IC.
MAX8808X/MAX8808Y/MAX8808Z
4
ISET
5
CHG
6
EN (MAX8808X/ MAX8808Z) EN (MAX8808Y)
7
ACOK
8 --
BATT EP
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
Detailed Description
The MAX8808X/MAX8808Y/MAX8808Z chargers use voltage, current, and thermal-control loops to charge a single Li+ cell and protect the battery (Figure 1). When a Li+ battery with a cell voltage below 2.5V is inserted, the MAX8808X charger enters the prequalification stage where it precharges that cell with 10% of the user-programmed fast-charge current (Figure 2). The CHG indicator output is driven low to indicate entry into the prequalification state. When battery voltage exceeds 2.5V, the charger soft-starts as it enters the fast-charge stage. In the MAX8808X/MAX8808Y/ MAX8808Z, the fast-charge current level is programmed through a resistor from ISET to GND. 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 that the battery is fully charged. The ICs then enter a constant voltage-regulation mode to maintain the battery at full charge.
4.25V TO 15V 1F
IN
BATT 1F +115C OUTPUT DRIVER, CURRENT SENSE, AND LOGIC TEMP SENSOR
ISET 2.8k IREF IN 100k VL 0.47F IN VL BATT VREF VI/O
MAX8808X MAX8808Y MAX8808Z
ACOK
UVLO VI/O REF CHG IN OVP REF OK N 200k ON LOGIC
EN (MAX8808Y)
100k
EN (MAX8808X/ MAX8808Z)
GND
Figure 1. Functional Diagram
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
SHUTDOWN CHARGER = OFF CHG = HIGH VIN > 7V OR VBATT > VIN OR IC DISABLED
VBATT < 2.5V
AND D N < 7V VIN VBATT A D > LE VIN ENAB IC MAX8808X
PREQUAL 10% CHARGE CURRENT CHG = LOW
ASYNCHRONOUS FROM ANYWHERE VIN > 7V OR VBATT > VIN OR IC DISABLED
VBATT < 2.4V MAX8808Y/ MAX8808Z VBATT > 2.5V
FAST-CHARGE 100% CHARGER CURRENT CHG = LOW
ICHARGE > 20% OF ISET
ICHARGE < 10% OF ISET
TOP-OFF CHG = HIGH
TOP-OFF CONTINUES TO REGULATE BATT AT 4.2V
Figure 2. Charge-State Diagram
Thermal Regulation
The thermal-regulation loop limits the MAX8808X/ MAX8808Y/MAX8808Z die temperature to +115C by reducing the charge current as necessary. This feature not only protects the ICs from overheating, but also allows a higher charge current without risking damage to the system.
EN (MAX8808X/MAX8808Z) and EN (MAX8808Y) Charger Enable Input
The MAX8808X/MAX8808Z contain an active-low logic input (EN) used to enable the charger. Drive EN low, leave floating, or connect to GND to enable the charge-control circuitry. Drive EN high to disable the
V VIN IN < >7 IC VB V AN EN ATT D AB AN LE D D
charger-control circuitry. EN has a 200k internal pulldown resistor. The MAX8808Y contains an active-high enable input (EN) to enable the charger. Drive EN high to enable the charge-control circuitry. Drive EN low to disable the charger-control circuitry. Do not leave EN floating. It has no internal pullup or pulldown resistor.
ACOK Output
The open-drain ACOK output asserts low when +4.25V VIN +7V and VIN - VBATT 40mV. ACOK requires an external pullup resistor (100k typ). ACOK is high impedance during shutdown.
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
VL Internal Voltage Regulator
The MAX8808X/MAX8808Y/MAX8808Z linear chargers contain an internal linear regulator to supply the power for the IC. Bypass VL to GND with a 0.47F ceramic capacitor. VL is regulated to 3.0V whenever the input voltage is above the battery voltage. Calculate RISET as follows: RISET = 1302V / IFASTCHG where IFASTCHG is in Amps and RISET is in Ohms. ISET can be used to monitor the fast-charge current level. The output current from ISET is 1.08mA per amp of charging current. The output voltage at ISET is proportional to the charging current: VISET = (ICHARGE x RISET) / 930 The voltage at ISET is nominally 1.4V at the selected fast-charge current, and falls with charging current as the cell becomes fully charged or as the thermal-regulation circuitry activates.
CHG Charge-Indicator Output
CHG is an open-drain output that indicates charge status. Table 1 describes the state of CHG during different stages of operation. CHG is suitable for driving a charge-indication LED. If the MAX8808X/MAX8808Y/ MAX8808Z is used in conjunction with a P, a pullup resistor to the logic I/O voltage allows CHG to indicate charge status to the P instead of driving an LED.
Capacitor Selection
Connect a ceramic capacitor from BATT to GND for proper stability. Use a 1F X5R ceramic capacitor for most applications. Connect a 1F ceramic capacitor from IN to GND. Use a larger input bypass capacitor for high charging currents to reduce supply noise. Connect a 0.47F ceramic capacitor from VL to GND.
Soft-Start
The soft-start algorithm activates when entering fastcharge mode. In the MAX8808X, when the prequalification state is complete (V BATT exceeds +2.5V), the charging current ramps up in 1ms to the full charging current. This reduces the inrush current on the input supply. Note that the MAX8808Y and MAX8808Z do not have a prequalification state and enter soft-start directly after being enabled.
Thermal Considerations
The MAX8808X/MAX8808Y/MAX8808Z are available in a thermally enhanced TDFN package with exposed paddle. Connect the exposed paddle to a large copper ground plane to provide a thermal contact between the device and the circuit board for increased power dissipation. The exposed paddle transfers heat away from the device, allowing the ICs to charge the battery with maximum current, while minimizing the increase in die temperature.
Applications Information
Charge-Current Selection
The maximum charging current is programmed by an external resistor connected from ISET to GND (RISET).
Table 1. CHG States
EN MAX8808X X Low Low Low Low High EN MAX8808Y X -- High High High Low EN MAX8808Z X -- Low Low Low High VIN VBATT 4.25V VIN 7V 4.25V VIN 7V 4.25V VIN 7V >7V X VBATT VIN <2.4V 2.5V 4.2V X X IBATT 0 10% of IFAST IFAST* <10% of IFAST 0 0 CHG High-Impedance Low Low High-Impedance High-Impedance High-Impedance STATE Shutdown Prequal Fast-Charge Top-off Shutdown Disabled
X = Don't care. -- = Prequal not applicable to MAX8808Y and MAX8808Z. *IFAST is reduced as necessary to prevent the die temperature from exceeding +115C.
8
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
DC Input Sources
The MAX8808X/MAX8808Y/MAX8808Z operate from well-regulated DC sources. The full charging input voltage range is 4.25V to 7V. The device can withstand up to 15V on the input without damage to the IC. If VIN is greater than 7V, the internal overvoltage-protection circuitry disables charging until the input falls below 7V. An appropriate power supply must provide at least 4.25V at the desired peak charging current. It also must stay below 6.5V when unloaded.
MAX8808X/MAX8808Y/MAX8808Z
Application Circuits
VI/O
4.25V TO 15V IN C1 1F ENABLE INPUT
R2 510
R3 100k AC-INPUT PRESENT INDICATOR
MAX8808X CHG (MAX8808Y) MAX8808Z ACOK
BATT C2 1F
Stand-Alone Li+ Charger The MAX8808X/MAX8808Y/MAX8808Z provide a complete Li+ charging solution. Figure 3 shows a standalone Li+ battery charger. The 2.8k resistor connected to ISET sets a charging current of 465mA. The LED connected to the CHG output indicates when either fast-charge or precharge qualification has begun. When the battery is full, CHG turns high impedance and the LED turns off. Microprocessor-Interfaced Charger Figure 4 shows the MAX8808X as a P co-operated Li+ battery charger. The MAX8808X begins charging the battery when EN is low. The P can drive EN high to disable the charger. The MAX8808X generates a ACOK signal to indicate the presence of an input supply. CHG is used to detect the charge status of the battery. By monitoring VISET, the system can measure the charging current.
EN (EN)
4.2V Li+
ISET R1 2.8k GND
VL C3 0.47F
Figure 3. Stand-Alone Li+ Battery Charger
AC/DC ADAPTER
IN C1 1F
BATT
C2 1F
4.2V Li+ VI/O
MAX8808XETA
CHG GND R3 100k
SYSTEM
VL C3 0.47F ISET R1 2.8k
ACOK
EN R2 10k C4 0.1F
CHARGE-CURRENT MONITOR VI/O R4 100k LOW: CHARGE, HIGH: FULL OR OFF
Figure 4. P-Interfaced Li+ Battery Charger
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
USB-Powered Li+ Charger The universal serial bus (USB) provides a high-speed serial communication port as well as power for the remote device. The MAX8808X/MAX8808Y/MAX8808Z can be configured to charge a battery at the highest current possible from the host port. Figure 5 shows the MAX8808X as a USB battery charger. To make the circuit compatible with either 100mA or 500mA USB ports, the circuit initializes at 100mA charging current. The P then enumerates the host to determine its current capability. If the host port is capable, the charging current is increased to 425mA to avoid exceeding the 500mA USB specification.
Layout and Bypassing
Place the input capacitor as close to the device as possible. Provide a large copper ground plane to allow the exposed paddle to sink heat away from the device. Connect the battery to BATT as close to the device as possible to provide accurate battery voltage sensing. Make all high-current traces short and wide to minimize voltage drops. A sample layout is available in the MAX8808 evaluation kit to speed designs.
VBUS GND C1 1F
IN
BATT
C2 1F
4.2V Li+ VI/O
MAX8808XETA
CHG GND R3 100k
SYSTEM
VL USB PORT C3 0.47F ISET R2 13k
ACOK
EN
R1 4k
N
HIGH: 425mA, LOW: 100mA VI/O R4 100k
D+ D-
Figure 5. USB Battery Charger
10
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
Pin Configuration
PROCESS: BiCMOS
BATT ACOK CHG
Chip Information
MAX8808X/MAX8808Y/MAX8808Z
TOP VIEW
8
7
EN (EN) 6 3 GND
5
MAX8808
1 IN 2 VL 4 ISET
TDFN
( ) INDICATES THE MAX8808Y.
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN MAX8808X/MAX8808Y/MAX8808Z
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 8L TDFN EXPOSED PADS.EPS
PACKAGE OUTLINE 8L TDFN EXPOSED PAD, 2x2x0.80mm
21-0168
A
1
2
12
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1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
MAX8808X/MAX8808Y/MAX8808Z
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 1.90 1.90 0.00 0.20 MAX. 0.80 2.10 2.10 0.05 0.40
0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T822-1 N 8 D2 0.700.10 E2 1.300.10 e 0.50 TYP. JEDEC SPEC MO229 b 0.250.05 [(N/2)-1] x e 1.50 REF
DOWNBONDS ALLOWED
NO
PACKAGE OUTLINE 8L TDFN EXPOSED PAD, 2x2x0.80mm
21-0168
A
2
2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.

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