LTC3459 10V Micropower Synchronous Boost Converter FEATURES DESCRIPTION n Small Solution Size The LTC 3459 is a low current, high ef ciency synchronous n >85% Ef ciency over Wide Load Range boost converter intended for low power, size constrained n Internal Synchronous Recti er portable applications. The LTC3459 can be powered from n V Range: 1.5V to 5.5V a single lithium ion battery, a 2- to 3-cell stack of alkaline IN n 5V at 30mA from 3.3V Input or nickel batteries, or any low impedance voltage source n 3.3V at 20mA from 2 AA Cell Input between 1.5V and 5.5V. The output is programmable via n Programmable Output Voltages Up to 10V an external divider between 2.5V and 10V. Although the n Burst Mode Operation part is primarily intended for boost applications, V will OUT n Inrush Current Limiting maintain regulation below V (at reduced ef ciency). IN n Output Disconnect in Shutdown The LTC3459 offers Burst Mode operation with a xed n Ultralow Quiescent (10A) and Shutdown (<1A) peak current, providing high conversion ef ciency over Currents a wide range of load currents. During start-up, inductor n Low Pro le 2mm 2mm DFN, 2mm 3mm DFN or current is controlled preventing the inrush surge current SOT-23 Package found in many boost converters. In shutdown the output is disconnected from the input and quiescent current is reduced to <1A. APPLICATIONS The LTC3459 is offered in low pro le 6-pin 2mm 2mm n General Purpose Micropower Boost TM DFN, 2mm 3mm DFN or SOT-23 (ThinSOT ) packages, n Digital Cameras allowing a tiny footprint for the total solution. n PDAs n LCD Bias , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other n Small OLED Displays trademarks are the property of their respective owners. n Supercap Charging TYPICAL APPLICATION 5V to 8V Converter Ef ciency 100 V = 5V IN V = 8V OUT 22H 90 SW V OUT 5V V V 8V IN OUT 80 30mA 2M 47pF LTC3459 70 1F OFF ON SHDN FB 4.7F GND 365k 60 3459 TA01a 50 0.01 0.1 1 10 100 I (mA) LOAD 3459 TA01b 3459fc 1 EFFICIENCY (%)LTC3459 ABSOLUTE MAXIMUM RATINGS Referred to GND (Note 1) Storage Temperature Range .................. 65C to 150C V , FB Voltage ........................................... 0.3V to 7V IN Re ow Temperature .............................................. 260C V , SHDN Voltage ................................. 0.3V to 10V OUT Lead Temperature, S6 Package SW Voltage .............................................. 0.3V to 12V (Soldering, 10 sec) .......................................... 300C Operating Temperature Range (Notes 2, 3) ......................................... 40C to 85C PIN CONFIGURATION TOP VIEW TOP VIEW TOP VIEW V 1 6 SW 6 IN SHDN 1 V IN SW 1 6V IN V 2 7 5 GND 7 OUT V 2 5 GND OUT GND 2 5V OUT SHDN 3 4 FB FB 3 4 SW FB 3 4SHDN S6 PACKAGE DC PACKAGE DCB PACKAGE 6-LEAD PLASTIC TSOT-23 6-LEAD (2mm s 2mm) PLASTIC DFN 6-LEAD (2mm 3mm) PLASTIC DFN T = 125C, = 192C/W JMAX JA T = 125C, = 102C/W T = 125C, = 64C/W JMAX JA JMAX JA EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3459EDC PBF LTC3459EDC TRPBF LDTG 40C to 85C Low Pro le (2mm 2mm) Plastic DFN LTC3459EDCB PBF LTC3459EDCB TRPBF LDMM 40C to 85C Low Pro le (2mm 3mm) Plastic DFN LTC3459ES6 PBF LTC3459ES6 TRPBF LTAHA Low Pro le SOT-23 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: