19-3670; Rev 0; 4/05 KIT ATION EVALU E L B AVAILA 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN Features 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. ♦ Stand-Alone Linear 1-Cell Li+ Battery Charger 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). ♦ Tiny 2mm x 2mm 8-Pin TDFN Package, 0.8mm (max) Height 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 (-40°C to +85°C) and are available in a compact 8-pin thermally enhanced 2mm x 2mm TDFN package with 0.8mm (max) height. ♦ No External FET, Reverse Blocking Diode, or Current-Sense Resistor Required ♦ Programmable Fast-Charge Current (1A max) ♦ Proprietary Die Temperature Regulation Control (+115°C) ♦ +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 (µP) Interface Ordering Information PIN-PACKAGE TOP MARK MAX8808XETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) AAC MAX8808YETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) AAB MAX8808ZETA+ 8 TDFN-EP* 2mm x 2mm (T822-1) AAA PART All devices specified over the -40°C to +85°C operating range. +Denotes lead-free package. *EP = Exposed paddle. Applications Typical Operating Circuit Cellular and Cordless Phones Smartphones and PDAs 4.25V TO 15V IN BATT Digital Still Cameras and MP3 Players USB Appliances CHG Charging Cradles and Docks Bluetooth® Equipment Pin Configuration appears at end of data sheet. Bluetooth is a registered trademark of Bluetooth SIG. 4.2V Li+ MAX8808X MAX8808Y MAX8808Z OFF ON EN* ACOK ISET VL GND *MAX8808Y USES ACTIVE-HIGH LOGIC FOR EN. ________________________________________________________________ Maxim Integrated Products 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. 1 MAX8808X/MAX8808Y/MAX8808Z General Description MAX8808X/MAX8808Y/MAX8808Z 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN 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 = +70°C) 8-Pin 2mm x 2mm TDFN (derate 15.4mW/°C above +70°C).............................................................1234mW BATT 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 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 = 100kΩ to 5V, EN = unconnected (for the MAX8808X and MAX8808Z), EN = VL (for the MAX8808Y), RISET = 2.8kΩ to GND, CVL = 0.47µF, CBATT = 1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER CONDITIONS MIN Input Voltage Range Input Operating Range ACOK Threshold VIN - VBATT, 10mV hysteresis (typ) Overvoltage-Lockout Trip Point VIN rising, 100mV hysteresis (typ) IN Input Current TYP V 4.25 6.50 V VIN rising 15 40 60 VIN falling 10 30 45 6.5 7 7.5 Charging (IIN - IBATT) 0.8 2 Disabled 0.23 0.50 IVL = 100µA 3.0 VL Load Regulation IVL = 100µA to 2mA -5 VL Undervoltage-Lockout Trip Point VVL rising, 100mV hysteresis (typ) Battery Regulation Voltage 2.74 10 Disabled 1 10 4.200 4.238 1 4.162 2 TA = 0°C to +85°C 418 mV µA ARMS 2.2 VBATT = 3.5V mA V 1 Minimum BATT Bypass Capacitance Fast-Charge Current Loop System Accuracy V V -30 VIN = 0 to 4V IBATT = 1mA mV 0.065 VL Output Voltage Maximum RMS Charge Current UNITS 15 OFF state (VIN = VBATT = 4.0V) BATT Input Current MAX 0 465 _______________________________________________________________________________________ V µF/A 512 mA 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN (VIN = 5V, VBATT = 4.0V, R ACOK = R CHG = 100kΩ to 5V, EN = unconnected (for the MAX8808X and MAX8808Z), EN = VL (for the MAX8808Y), RISET = 2.8kΩ to GND, CVL = 0.47µF, CBATT = 1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Prequal Charge Current CONDITIONS Percentage of the fast-charge current, VBATT = 2.2V, MAX8808X MIN TYP MAX UNITS 5 10 15 % Die Temperature Regulation Threshold +115 VBATT Prequal Threshold Voltage VBATT rising, MAX8808X Current-Sense Amplifier Gain, IBATT to IISET IBATT = 500mA, VISET = 1.4V Regulator Dropout Voltage (VIN - VBATT ) VBATT = 4.1V, IBATT = 425mA EN/EN Logic Input Low Voltage 4.25V < VIN < 6.5V EN/EN Logic Input High Voltage 4.25V < VIN < 6.5V 1.3 EN Internal Pulldown Resistor MAX8808X and MAX8808Z only 100 EN Input Leakage Current MAX8808Y, VEN = 5.5V CHG Output Low Voltage I CHG = 5mA CHG Output High Leakage Current V CHG = 5.5V ACOK Output Low Voltage I ACOK = 5mA ACOK Output High Leakage Current V ACOK = 5.5V Full-Battery Detection Current Threshold IBATT falling, percentage of the fast-charge current TA = 0°C to +85°C °C 2.3 2.5 2.7 V 0.97 1.08 1.19 mA/A 250 430 mV 0.52 V 400 kΩ V 200 TA = +25°C 1 TA = +85°C 0.002 0.4 TA = +25°C 1 TA = +85°C 0.002 0.4 TA = +25°C 1 TA = +85°C 0.002 5 10 15 µA V µA V µA % Note 1: Specifications are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design and characterization. _______________________________________________________________________________________ 3 MAX8808X/MAX8808Y/MAX8808Z ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VIN = 5V, VBATT = 4.0V, ACOK = EN = unconnected, RISET = 2.8kΩ to GND, CIN = 1µF, CBATT = 1µF, CVL = 0.47µF, TA = +25°C, unless otherwise noted.) DISABLED-MODE SUPPLY CURRENT vs. INPUT VOLTAGE 700 1.4 1.2 1.0 0.8 0.6 600 500 400 300 200 0.4 900 800 700 600 MAX8808Y/ MAX8808Z 500 400 MAX8808X 300 200 0.2 100 0 0 2 4 6 8 10 12 14 16 VEN = 5V OR VEN = 0V 100 0 0 INPUT VOLTAGE (V) 2 4 6 8 10 12 14 16 CHARGE CURRENT vs. INPUT VOLTAGE HEADROOM 800 700 600 500 400 300 1000 MAX8808X/Y/Z toc05 900 900 800 CHARGE CURRENT (mA) MAX8808X/Y/Z toc04 1000 CHARGE CURRENT (mA) 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 VBATT (V) CHARGE CURRENT vs. INPUT VOLTAGE 700 600 500 400 300 200 200 100 100 0 0 2 4 6 8 10 12 14 0 (VIN - VBAT) (mV) BATTERY REGULATION VOLTAGE vs. AMBIENT TEMPERATURE CHARGE CURRENT vs. AMBIENT TEMPERATURE MAX8808X/Y/Z toc06 4.240 4.230 4.220 4.210 4.200 4.190 4.180 600 500 450 350 4.160 250 -15 10 35 TA (°C) 60 85 VBATT = 3.2V 400 300 4.150 VBATT = 4V 550 4.170 -40 50 100 150 200 250 300 350 400 450 500 VIN (V) CHARGE CURRENT (mA) 0 BATTERY REGULATION VOLTAGE (V) 0 INPUT VOLTAGE (V) MAX8808X/Y/Z toc07 0 4 1000 MAX8808X/Y/Z toc03 1.6 SUPPLY CURRENT (µA) 1.8 MAX8808X/Y/Z toc02 800 MAX8808X/Y/Z toc01 2.0 CHARGE CURRENT vs. BATTERY VOLTAGE CHARGE CURRENT (mA) SUPPLY CURRENT vs. INPUT VOLTAGE SUPPLY CURRENT (mA) MAX8808X/MAX8808Y/MAX8808Z 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN 200 -40 -15 10 35 60 TA (°C) _______________________________________________________________________________________ 85 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN PIN NAME FUNCTION 1 IN Input Supply Voltage. Bypass IN to GND with a 1µF or larger ceramic capacitor to improve line noise and input transient rejection. 2 VL Internally Generated Logic Supply for IC. Bypass VL to GND with a 0.47µF ceramic capacitor. 3 GND 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. 4 ISET 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 / RISETΩ. 5 CHG 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 µP’s I/O voltage when interfacing with a µP 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 200kΩ pulldown resistor. 6 EN (MAX8808X/ MAX8808Z) EN (MAX8808Y) Logic-Level Enable Input. Drive EN low to disable charger. Pull EN high for normal operation. EN has no internal pullup or pulldown resistor. 7 ACOK Input Status Indicator. ACOK is an open-drain output that asserts low when VIN < +7V and (VIN – VBATT) ≥ 40mV. ACOK requires an external 100kΩ pullup resistor. ACOK is high impedance during shutdown. 8 BATT Li+ Battery Connection. Bypass BATT to GND with a ceramic capacitor of at least 2.2µF per ampere of charge current. — EP 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. _______________________________________________________________________________________ 5 MAX8808X/MAX8808Y/MAX8808Z Pin Description MAX8808X/MAX8808Y/MAX8808Z 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN 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. 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 4.25V TO 15V BATT IN 1µF 1µF +115°C OUTPUT DRIVER, CURRENT SENSE, AND LOGIC TEMP SENSOR ISET 2.8kΩ VREF IREF VI/O IN 100kΩ IN VL VL BATT 0.47µF MAX8808X MAX8808Y MAX8808Z ACOK EN (MAX8808Y) UVLO VI/O IN REF 100kΩ CHG OVP ON EN (MAX8808X/ MAX8808Z) LOGIC REF OK 200kΩ N GND Figure 1. Functional Diagram 6 _______________________________________________________________________________________ 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN AND D N < 7V VIN VBATT A D E > L VIN ENAB IC MAX8808X VBATT < 2.5V VIN > 7V OR VBATT > VIN OR IC DISABLED VBATT < 2.4V MAX8808Y/ MAX8808Z ASYNCHRONOUS FROM ANYWHERE VIN > 7V OR VBATT > VIN OR IC DISABLED V VIN IN < > 7 IC VB V AN EN ATT D AB AN LE D D PREQUAL 10% CHARGE CURRENT CHG = LOW MAX8808X/MAX8808Y/MAX8808Z SHUTDOWN CHARGER = OFF CHG = HIGH VBATT > 2.5V FAST-CHARGE 100% CHARGER CURRENT CHG = LOW ICHARGE < 10% OF ISET ICHARGE > 20% 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 +115°C 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 charger-control circuitry. EN has a 200kΩ 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 (100kΩ typ). ACOK is high impedance during shutdown. _______________________________________________________________________________________ 7 MAX8808X/MAX8808Y/MAX8808Z 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN 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 0.47µF ceramic capacitor. VL is regulated to 3.0V whenever the input voltage is above the battery voltage. 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 µP, a pullup resistor to the logic I/O voltage allows CHG to indicate charge status to the µP instead of driving an LED. 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. Applications Information Charge-Current Selection The maximum charging current is programmed by an external resistor connected from ISET to GND (RISET). 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. Capacitor Selection Connect a ceramic capacitor from BATT to GND for proper stability. Use a 1µF X5R ceramic capacitor for most applications. Connect a 1µF ceramic capacitor from IN to GND. Use a larger input bypass capacitor for high charging currents to reduce supply noise. Connect a 0.47µF ceramic capacitor from VL to GND. 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. Table 1. CHG States EN MAX8808X EN MAX8808Y EN MAX8808Z VIN VBATT IBATT CHG STATE Shutdown X X X ≤VBATT ≥VIN 0 High-Impedance Low — — 4.25V ≤ VIN ≤ 7V <2.4V 10% of IFAST Low Prequal Low High Low 4.25V ≤ VIN ≤ 7V ≥2.5V IFAST* Low Fast-Charge Low High Low 4.25V ≤ VIN ≤ 7V 4.2V <10% of IFAST High-Impedance Top-off Low High Low >7V X 0 High-Impedance Shutdown High Low High X X 0 High-Impedance Disabled X = Don’t care. — = Prequal not applicable to MAX8808Y and MAX8808Z. *IFAST is reduced as necessary to prevent the die temperature from exceeding +115°C. 8 _______________________________________________________________________________________ 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN Application Circuits Stand-Alone Li+ Charger The MAX8808X/MAX8808Y/MAX8808Z provide a complete Li+ charging solution. Figure 3 shows a standalone Li+ battery charger. The 2.8kΩ 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. VI/O IN C1 1µF ENABLE INPUT MAX8808X CHG (MAX8808Y) MAX8808Z ACOK BATT EN (EN) ISET R1 2.8kΩ R3 100kΩ R2 510Ω 4.25V TO 15V AC-INPUT PRESENT INDICATOR C2 1µF 4.2V Li+ Microprocessor-Interfaced Charger Figure 4 shows the MAX8808X as a µP co-operated Li+ battery charger. The MAX8808X begins charging the battery when EN is low. The µP 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. VL C3 0.47µF GND Figure 3. Stand-Alone Li+ Battery Charger AC/DC ADAPTER IN BATT C2 1µF C1 1µF 4.2V Li+ VI/O MAX8808XETA CHG GND VL R3 100kΩ SYSTEM ACOK C3 0.47µF ISET EN R1 2.8kΩ CHARGE-CURRENT MONITOR VI/O R2 10kΩ C4 0.1µF R4 100kΩ LOW: CHARGE, HIGH: FULL OR OFF Figure 4. µP-Interfaced Li+ Battery Charger _______________________________________________________________________________________ 9 MAX8808X/MAX8808Y/MAX8808Z 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. 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 MAX8808X/MAX8808Y/MAX8808Z 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN 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 µP 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. VBUS GND BATT IN C1 1µF C2 1µF 4.2V Li+ VI/O MAX8808XETA CHG GND VL USB PORT 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. R3 100kΩ SYSTEM ACOK C3 0.47µF ISET R2 13kΩ R1 4kΩ EN N HIGH: 425mA, LOW: 100mA VI/O R4 100kΩ D+ D- Figure 5. USB Battery Charger 10 ______________________________________________________________________________________ 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN Chip Information ACOK CHG 8 EN (EN) TOP VIEW BATT PROCESS: BiCMOS 7 6 5 2 3 4 GND ISET IN 1 VL MAX8808 TDFN ( ) INDICATES THE MAX8808Y. ______________________________________________________________________________________ 11 MAX8808X/MAX8808Y/MAX8808Z Pin Configuration 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 MAX8808X/MAX8808Y/MAX8808Z 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN PACKAGE OUTLINE 8L TDFN EXPOSED PAD, 2x2x0.80mm 21-0168 12 ______________________________________________________________________________________ A 1 2 1A Linear Li+ Battery Chargers with Integrated Pass FET and Thermal Regulation in 2mm x 2mm TDFN COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 1.90 2.10 E 1.90 2.10 A1 0.00 0.05 L 0.20 0.40 k 0.25 MIN. A2 0.20 REF. PACKAGE VARIATIONS PKG. CODE N D2 E2 e T822-1 8 0.70±0.10 1.30±0.10 0.50 TYP. JEDEC SPEC b [(N/2)-1] x e DOWNBONDS ALLOWED MO229 0.25±0.05 1.50 REF 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 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. MAX8808X/MAX8808Y/MAX8808Z 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.)