POWER LOSS (mW) LTC3525-3/ LTC3525-3.3/LTC3525-5 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect Fea T Descrip T n Up to 95% Efficiency The LTC 3525-3/LTC3525-3.3/LTC3525-5 are high efficiency n Output Disconnect and Inrush Current Limit synchronous step-up DC/DC converters with output discon- n Fixed Output Voltages of 3V, 3.3V or 5V nect that can start up with an input as low as 0.85V. They n Delivers 65mA at 3V from a 1V Input offer a compact, high efficiency alternative to charge pumps n Delivers 60mA at 3.3V from a 1V Input, in single cell or dual cell alkaline or Li-Ion applications. Only or 140mA at 3.3V from a 1.8V Input three small external components are required. The LTC3525 n Delivers 175mA at 5V from a 3V Input is offered in fixed output voltages of 3V, 3.3V or 5V. n Burst Mode Operation: I = 7A Q The device includes a 0.5 N-channel MOSFET switch and n Only Three External Components a 0.8 P-channel synchronous rectifier. Peak switch current n V > V Operation IN OUT ranges from 150mA to 400mA, depending on load, providing n <1A Shutdown Current enhanced efficiency. Quiescent current is an ultralow 7A, n Antiringing Control maximizing battery life in portable applications. n Short-Circuit and Overtemperature Protection n Other features include <1A shutdown current, anti- Very Low Profile of 1mm n ringing control and thermal shutdown. The LTC3525 is Tiny 6-Lead SC70 Package available in a tiny 6-Lead SC70 package. a T List of LTC3525 Options n PART NAME INPUT START-UP OUTPUT V STATUS IN MP3 Players OUT VOLTAGE VOLTAGE SHUTDOWN MODE n Portable Instruments LTC3525-3 0.85V 3V Output Disconnect n Glucose Meters LTC3525-3.3 0.85V 3.3V Output Disconnect n Digital Cameras LTC3525-5 0.85V 5V Output Disconnect L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the LTC3525D-3.3 0.85V 3.3V Pass Through Mode property of their respective owners. Patents pending. LTC3525L-3 0.7V 3V Output Disconnect LTC3525-3.3 Efficiency and Power Typical a T Loss vs Load Current L1* 100 100 10H 90 80 10 LTC3525-3.3 EFFICIENCY V IN V SW IN 70 1V TO 1.6V V OUT 3.3V OFF ON SHDN V 60 1 OUT 60mA POWER LOSS 50 GND GND 1F 10F 40 0.1 V = 3V IN 30 V = 2.4V 3525 TA01 IN V = 1.2V IN 20 0.01 0.01 0.1 1 10 100 1000 *MURATA LQH32CN100K53 LOAD (mA) LT3525 TA02 3525fc 1 For more information www.linear.com/LTC3525 EFFICIENCY (%) ion pplica ions pplica ion uresLTC3525-3/ LTC3525-3.3/LTC3525-5 a Te Maxi Mu M r a T p in c F T (Note 1) TOP VIEW V , V Voltage ........................................ 0.3V to 6V IN OUT SW Voltage ................................................. 0.3V to 6V SHDN 1 6 SW GND 2 5 GND SW Voltage < 100ns .................................... 0.3V to 7V V 3 4 V IN OUT SHDN Voltage ............................................. 0.3V to 6V Operating Junction Temperature Range SC6 PACKAGE 6-LEAD PLASTIC SC70 (Notes 2, 5) ............................................ 40C to 125C T = 125C JMAX Storage Temperature Range .................. 65C to 125C = 256C/W IN FREE AIR, = 150C/W ON BOARD OVER GROUND PLANE JA JA Lead Temperature (Soldering, 10 sec) ...................300C o r Der i n F Ma T LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3525ESC6-3 PBF LTC3525ESC6-3 TRPBF LCDR 6-Lead Plastic SC70 40C to 85C LTC3525ISC6-3 PBF LTC3525ISC6-3 TRPBF LCDR 6-Lead Plastic SC70 40C to 125C LTC3525ESC6-3.3 PBF LTC3525ESC6-3.3 TRPBF LBTG 6-Lead Plastic SC70 40C to 85C LTC3525ISC6-3.3 PBF LTC3525ISC6-3.3 TRPBF LBTG 6-Lead Plastic SC70 40C to 125C LTC3525ESC6-5 PBF LTC3525ESC6-5 TRPBF LBWT 6-Lead Plastic SC70 40C to 85C LTC3525ISC6-5 PBF LTC3525ISC6-5 TRPBF LBWT 6-Lead Plastic SC70 40C to 125C Consult LTC Marketing for parts specified with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based finish parts. For more information on lead free part marking, go to: