LTC3567 High Ef ciency USB Power Manager Plus 1A Buck-Boost 2 Converter with I C Control FEATURES DESCRIPTION Power Manager The LTC 3567 is a highly integrated power management n High Ef ciency Switching PowerPath Controller and battery charger IC for Li-Ion/Polymer battery applica- with Bat-Track Adaptive Output Control tions. It includes a high ef ciency current limited switching n Programmable USB or Wall Current Limit PowerPath manager with automatic load prioritization, (100mA/500mA/1A) a battery charger, an ideal diode, and a high ef ciency n Full Featured Li-Ion/Polymer Battery Charger synchronous buck-boost switching regulator. Designed n Instant-On Operation with a Discharged Battery speci cally for USB applications, the LTC3567s switch- n 1.5A Maximum Charge Current ing power manager automatically limits input current to n Internal 180m Ideal Diode Plus External Ideal Diode a maximum of either 100mA or 500mA for USB or 1A for Controller Powers Load in Battery Mode adapter-powered applications. n Low No-Load I When Powered from BAT (<30A) Q The LTC3567s switching input stage transmits nearly all of the 2.5W available from the USB port to the system load 1A Buck-Boost DC/DC with minimal power wasted as heat. This feature allows n High Ef ciency (1A I ) OUT the LTC3567 to provide more power to the application and n 2.25MHz Constant Frequency Operation eases thermal budgeting constraints in small spaces. n Low No-Load Quiescent Current (~13A) n The synchronous buck-boost DC/DC can provide up to Zero Shutdown Current 2 n 1A output current. I C Control of All Functions The LTC3567 is available in a low pro le 24-pin (4mm 4mm 0.75mm) QFN surface mount package. APPLICATIONS L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath n HDD Based MP3 Players, PDA, GPS, PMP Products and Bat-Track are a trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118 and 6404251. n Other USB Based Handheld Products TYPICAL APPLICATION LTC3567 USB Power Manager with a 3.3V/1A Buck-Boost Switching Regulator Ef ciency to FROM AC 3.3H System Load (P /P ) OUT BUS ADAPTER V = OUT FROM USB V SW V 100 BUS OUT BAT + 300mV 4.7F 10F OTHER DC/DCs 90 CLPROG GATE 100k 3.01k 80 PROG OPTIONAL BAT = 4.2V 70 0.1F 2k BAT + 60 Li-Ion BAT = 3.3V 3.3V/20mA 50 NTC LDO3V3 ALWAYS V 1F ON LDO 40 IN1 CHRG 100k LTC3567 T SWAB1 30 CHRGEN DIGITAL 2.2H 1F 20 V = 5V BUS CONTROL EN1 I = 0mA SWCD1 10 BAT 3.3V/1A 10x MODE V SCL OUT1 HDD 0 2 324k 0.01 0.1 1 I C SERIAL SDA INTERFACE I (A) 10F OUT FB1 3567 TA01b DV 1.5nF CC 105k V C1 3567 TA01 3567f 1 EFFICIENCY (%)LTC3567 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V (Transient) t<1ms, Duty Cycle<1% ...... 0.3V to 7V BUS V (Static), V , BAT, NTC, CHRG, DV , SCL, BUS IN1 CC SDA, EN1, CHRGEN ................................. 0.3V to 6V 24 23 22 21 20 19 FB1, V .................0.3V to Lesser of 6V or V + 0.3V C1 IN1 LDO3V3 1 18 GATE I ....................................................................3mA CLPROG CLPROG 2 17 GND I ......................................................................50mA CHRG NTC 3 16 CHRG 25 I ........................................................................2mA PROG FB1 4 15 PROG I ...................................................................30mA LDO3V3 V SDA 5 14 C1 I , I , I ............................................................2A SW BAT VOUT GND 6 13 SCL I , I , I , ............................................2.5A VOUT1 SWAB1 SWCD1 7 8 9 10 11 12 Operating Temperature Range (Note 2).... 40C to 85C Junction Temperature (Note 3) ............................. 125C Storage Temperature Range ................... 65C to 125C UF PACKAGE 24-LEAD (4mm 4mm) PLASTIC QFN T = 125C, = 37C/W JMAX JA EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3567EUF PBF LTC3567EUF TRPBF 3567 24-Lead (4mm 4mm) Plastic QFN 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: