3.6 V POWER LOSS (mW) IN LTC3458L 1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect FEATURES DESCRIPTIO High Efficiency: Up to 95% The LTC 3458L is a high efficiency, current mode, fixed Inrush Current Limiting and Output Disconnect frequency, step up DC/DC converter with true output Programmable Output Voltages up to 6V disconnect and inrush current limiting. The LTC3458L is 1.5V to 6V Input Range rated for up to 6V output and includes a 0.2 N-channel Programmable/Synchronizable Fixed Frequency MOSFET switch and a 0.3 P-channel MOSFET synchro- Operation up to 1.5MHz nous rectifier. The LTC3458L is well suited for battery Programmable Automatic Burst Mode Operation powered applications and includes programmable output Current Mode Control with Programmable Soft-Start voltage, switching frequency and loop compensation. The Period and Peak Current Limit oscillator frequency can be set up to 1.5MHz or synchro- 0.2 N-Channel and 0.3 P-Channel Switches nized to an external clock. Ultralow Quiescent Currents: 12A Sleep, <1 A in Quiescent current is only 12 A during Burst Mode opera- Shutdown tion maximizing battery life in portable applications. The 12-Pin 4mm 3mm Thermally Enhanced DFN Burst Mode current threshold, peak current limit, and soft- Package start are externally programmable. Other features include U <1A shutdown current, antiringing control, and thermal APPLICATIO S limit. The LTC3458L is available in a low profile (0.75mm), Point-of-Load Regulators 4mm 3mm 12-pin DFN package. USB V Power BUS , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All Portable GPS other trademarks are the property of their respective owners. Burst Mode is a registered MP3 Players trademark of Linear Technology Corporation. Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131. TYPICAL APPLICATIO Li-Ion to 5V at 1MHz 7.4H Li-Ion to 5V OUT 100 1000 SW V IN Li Ion 2.2F LTC3458L 95 4.2V IN 3.1V TO 4.2V V OUT V GND/PGND OUT 5V 90 3.1V 100 IN 750mA 10pF 3.6V 1M IN 85 FB ON OFF SHDN 80 10 COMP SYNC POWER 75 324k LOSS 0.01 F 33k 70 1 SS R T 22F 0.01F 10pF 65 X5R BURST I LIM 60 0.1 560pF 200k 84.5k 133k 0.1 110 100 1000 LOAD CURRENT (mA) 3458L TA01a 3458L TA01b 3458lfa 1 EFFICIENCY (%) U ULTC3458L ABSOLUTE AXI U RATI GS PIN CONFIGURATION (Note 1) TOP VIEW SW 1 12 V V , SS, SYNC Voltages ................................. 0.3 to 7V OUT IN V 2 11 BURST BURST, SHDN, V Voltages ....................... 0.3 to 7V IN OUT SYNC 3 10 SS Operating Temperature Range 13 SHDN 4 9 GND (Notes 2, 3) .........................................40C to 85C I 5 8 COMP LIM Storage Temperature Range ..................65C to 125C R 6 7 FB T SW Voltage DC ........................................................... 0.3V to 7V DE PACKAGE 12-LEAD (4mm 3mm) PLASTIC DFN Pulsed <100ns ........................................ 0.3V to 8V EXPOSED PAD IS PGND (PIN 13), MUST BE SOLDERED TO PCB T = 125C, = 45C/W JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3458LEDE PBF LTC3458LEDE TRPBF 3458L 12-Lead (4mm x 3mm) Plastic DFN 40C to 85C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: