LTC3566/LTC3566-2 High Ef ciency USB Power Manager Plus 1A Buck-Boost Converter FEATURES DESCRIPTION POWER MANAGER The LTC 3566 family are highly integrated power manage- High Ef ciency Switching PowerPath Controller ment and battery charger ICs for Li-Ion/Polymer battery with Bat-Track Adaptive Output Control applications. They include a high ef ciency current lim- Programmable USB or Wall Input Current Limit ited switching PowerPath manager with automatic load (100mA/500mA/1A) prioritization, a battery charger, an ideal diode, and a high Full Featured Li-Ion/Polymer Battery Charger ef ciency synchronous buck-boost switching regulator. Instant-On Operation with Discharged Battery Designed speci cally for USB applications, the LTC3566 1.5A Maximum Charge Current familys switching power manager automatically limits input Internal 180m Ideal Diode Plus External Ideal Diode current to a maximum of either 100mA or 500mA for USB Controller Powers Load in Battery Mode applications or 1A for adapter-powered applications. Low No-Load I when Powered from BAT (<30A) Q The LTC3566 familys switching input stage transmits nearly all of the 2.5W available from the USB port to the system 1A BUCK-BOOST DC/DC load with minimal power wasted as heat. This feature High Ef ciency (1A I ) OUT allows the LTC3566 family to provide more power to the 2.25MHz Constant Frequency Operation application and eases the constraint of thermal budgeting in Low No-Load Quiescent Current (~13A) small spaces. The LTC3566-2 automatically reduces charge Zero Shutdown Current current to maintain a regulated 3.6V V during low bat- OUT Pin Control of All Functions tery conditions the LTC3566 does not. The synchronous buck-boost DC/DC can provide up to 1A. APPLICATIONS The LTC3566 family is available in a low pro le 24-lead HDD Based MP3 Players, PDA, GPS, PMP Products 4mm 4mm QFN surface mount package. Other USB Based Handheld Products L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6522118, 6404251. TYPICAL APPLICATION LTC3566/LTC3566-2 USB Power Manager with 3.3V/1A Buck-Boost Switching Regulator Ef ciency to System Load (P /P ) 3.3H OUT BUS FROM AC ADAPTER 100 V = OUT FROM USB V SW V BUS OUT BAT + 300mV 90 10F TO OTHER 4.7F CLPROG DC/DCs 80 GATE 3.01k 100k OPTIONAL PROG BAT = 4.2V 70 0.1F 2k BAT + 60 Li-Ion 3.3V/25mA BAT = 3.3V NTC LDO3V3 ALWAYS 50 ON LDO V 1F IN1 CHRG 40 T 100k LTC3566/LTC3566-2 SWAB1 CHRGEN 2.2H 30 1F ILIM0 SWCD1 20 3.3V/1A V = 5V V BUS OUT1 ILIM1 DIGITAL CONTROL HDD I = 0mA 10 BAT 324k MODE 10x MODE 10F FB1 0 1.3nF EN1 105k 0.01 0.1 1 GND EXPOSED PAD VC1 I (A) OUT 3566 TA01 3566 TA01b 3566fb 1 EFFICIENCY (%)LTC3566/LTC3566-2 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V (Transient) t < 1ms, BUS Duty Cycle < 1% ...................................... 0.3V to 7V 24 23 22 21 20 19 V (Static), V , BAT, NTC, CHRG, MODE, I , BUS IN1 LIM0 LDO3V3 1 18 GATE I , EN1, CHRGEN ................................ 0.3V to 6V LIM1 CLPROG 2 17 GND NTC CHRG FB1, V ..............0.3V to Lesser of 6V or (V + 0.3V) 3 16 C1 IN1 25 FB1 4 15 PROG I ....................................................................3mA CLPROG V 5 14 I C1 LIM1 I ......................................................................50mA GND 6 13 I CHRG LIM0 7 8 9 10 11 12 I ........................................................................2mA PROG I ...................................................................30mA LDO3V3 I , I , I ............................................................ 2A SW BAT VOUT UF PACKAGE I , I , I .............................................2.5A VOUT1 SWAB1 SWCD1 24-LEAD (4mm 4mm) PLASTIC QFN Operating Temperature Range (Note 2).... 40C to 85C T = 125C, = 37C/W JMAX JA EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB Junction Temperature (Note 3) ............................. 125C Storage Temperature Range ................... 65C to 125C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3566EUF PBF LTC3566EUF TRPBF 3566 24-Lead (4mm 4mm) Plastic QFN 40C to 85C LTC3566EUF-2 PBF LTC3566EUF-2 TRPBF 35662 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: