POWER LOSS (mW) LTC4009 LTC4009-1/LTC4009-2 High Efficiency, Multi-Chemistry Battery Charger Fae Tseru Dpircse Tnoi n General Purpose Battery Charger Controller The LTC 4009 is a constant-current/constant-voltage n Efficient 550kHz Synchronous Buck PWM Topology battery charger controller. It uses a synchronous quasi- n 0.5% Output Float Voltage Accuracy constant frequency PWM control architecture that will n Programmable Charge Current: 4% Accuracy not generate audible noise with ceramic bulk capacitors. n Programmable AC Adapter Current Limit: Charge current is set by the combination of external 3% Accuracy sense, input and programming resistors. With no built-in n No Audible Noise with Ceramic Capacitors termination, the LTC4009 family charges a wide range of n Wide Input Voltage Range: 6V to 28V batteries under external control. n Wide Output Voltage Range: 2V to 28V The LTC4009 features a fully adjustable output voltage, while n Indicator Outputs for AC Adapter Present, Charging, the LTC4009-1 and LTC4009-2 can be pin-programmed for C/10 Current Detection and Input Current Limiting lithium-ion/polymer battery packs of 1-, 2-, 3- or 4-series n Analog Charge Current Monitor cells. The LTC4009-1 provides output voltage of 4.1V/cell, n Micropower Shutdown and the LTC4009-2 is a 4.2V/cell version. n Thermally Enhanced 20-Pin 4mm 4mm 0.75mm The device includes AC adapter input current limiting which QFN Package maximizes the charge rate for a fixed input power level. An external sense resistor programs the input current limit, and a acilpp Tsnoi the ICL status pin indicates when the battery charge current n Notebook Computers is being reduced as a result of AC adapter current limiting. n Portable Instruments n The CHRG status pin is active during all charging modes, Battery Backup Systems including special indication for low charge current. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and PowerPath and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5723970. T lacipy a acilpp Tnoi FROM 33m POWER TO ADAPTER SYSTEM 13V TO 20V 0.1F 20F 0.1F Efficiency at DCIN = 20V DCIN CLP 5.1k 14.3k CLN 100 10000 DCDIV BOOST 0.1F LTC4009 1.5k 95 TGATE EFFICIENCY CHRG SW 90 ACP INTV DD TO/FROM POWER LOSS 2F MCU 85 1000 ICL BGATE 6.8H SHDN GND V = 12.3V OUT 80 3.01k R = 33m SENSE ITH CSP R = 3.01k IN 6.04k R = 26.7k 75 PROG 33m D = SSB44 IN 3.01k 0.1F L = IHLP-2525CZ 6.8H CSN 70 100 BAT 0 0.5 1.0 1.5 2.0 2.5 3.0 CHARGE + CHARGE CURRENT (A) CURRENT PROG FBDIV 20F 12.3V MONITOR Li-Ion 301k 4009 TA01b 26.7k 4.7nF BATTERY V FB 4009 TA01a 32.8k 4009fd EFFICIENCY (%)LTC4009 LTC4009-1/LTC4009-2 a ulosb T e Mixa Mu M r a Tsgni (Note 1) DCIN, CLP, CLN or SW to GND ................... 0.3V to 30V ACP, CHRG or ICL to GND .......................... 0.3V to 30V CLP to CLN ............................................................0.3V Operating Temperature Range CSP, CSN or BAT to GND ........................... 0.3V to 28V (Note 2) ............................................. 40C to 125C CSP to CSN ............................................................0.3V Junction Temperature (Note 3) ............................. 125C BOOST to GND ........................................... 0.3V to 36V Storage Temperature Range .................. 65C to 150C BOOST to SW............................................... 0.3V to 7V DCDIV, SHDN, FVS0, FVS1 or V to GND ... 0.3V to 7V FB p ni c no Farugi Tnoi LTC4009 LTC4009-1 LTC4009-2 TOP VIEW TOP VIEW 20 19 18 17 16 20 19 18 17 16 CLN CSP CLN CSP 1 15 1 15 CLP 2 14 CSN CLP 2 14 CSN DCIN 3 21 13 PROG DCIN 3 21 13 PROG ICL 4 12 ITH ICL 4 12 ITH DCDIV 11 BAT DCDIV 11 BAT 5 5 6 7 8 9 10 6 7 8 9 10 UF PACKAGE UF PACKAGE 20-LEAD (4mm 4mm) PLASTIC QFNs 20-LEAD (4mm s 4mm) PLASTIC QFN T = 125C, = 37C/W T = 125C, = 37C/W JMAX JA JMAX JA EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB o r D re i n Fro Ma Tnoi LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC4009CUF PBF LTC4009CUF TRPBF 4009 0C to 85C 20-Lead (4mm 4mm) Plastic QFN LTC4009CUF-1 PBF LTC4009CUF-1 TRPBF 40091 20-Lead (4mm 4mm) Plastic QFN 0C to 85C LTC4009CUF-2 PBF LTC4009CUF-2 TRPBF 40092 20-Lead (4mm 4mm) Plastic QFN 0C to 85C LTC4009IUF PBF LTC4009IUF TRPBF 4009 40C to 125C 20-Lead (4mm 4mm) Plastic QFN LTC4009IUF-1 PBF LTC4009IUF-1 TRPBF 40091 40C to 125C 20-Lead (4mm 4mm) Plastic QFN LTC4009IUF-2 PBF LTC4009IUF-2 TRPBF 40092 40C to 125C 20-Lead (4mm 4mm) Plastic QFN Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: