POWER LOSS (mW) LTC3525L-3 400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect FEATURES DESCRIPTION n Start-Up at 0.7V Typical, 0.88V Guaranteed The LTC 3525L-3 is a high efficiency synchronous step- n Up to 95% Efficiency up DC/DC converter with output disconnect that can n Output Disconnect and Inrush Current Limit start up with an input as low as 0.7V. It offers a compact, n 3V Fixed Output Voltage high efficiency alternative to charge pumps in single n Delivers 65mA at 3V from a 1V Input or 160mA cell or dual cell alkaline applications. Only three small from a 1.8V Input external components are required. The LTC3525L-3 n Burst Mode Operation: I = 7A generates a fixed 3V output voltage. Q n V : 0.5V to 4.5V IN The device includes a 0.5 N-channel MOSFET switch n Only Three External Components and a 0.85 P-channel synchronous rectifier. Peak switch n V > V Operation IN OUT current ranges from 150mA to 400mA, depending on n <1A Shutdown Current load, providing enhanced efficiency. Quiescent current n Anti-Ringing Control is an ultralow 7A, maximizing battery life in portable n Short-Circuit and Overtemperature Protection applications. n Tiny 6-Pin SC70 Package Other features include <1A shutdown current, anti- ringing control and thermal shutdown. The LTC3525L-3 APPLICATIONS is available in a tiny 6-pin SC70 package. n MP3 Players L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n Portable Instruments and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents pending. n Glucose Meters n Digital Cameras TYPICAL APPLICATION LTC3525L-3 Efficiency and Power Loss vs Load Current 100 100 L1* 10H 90 80 10 LTC3525L-3 EFFICIENCY V IN 70 V SW IN 0.9V TO 1.6V V OUT 60 1 3V OFF ON SHDN V OUT POWER LOSS 65mA 50 GND GND 1F 10F 40 0.1 30 V = 2.4V IN 3525 TA01 V = 1.2V *MURATA LQH32CN100K53 IN 20 0.01 0.01 0.1 1 10 100 1000 LOAD (mA) LT3525 TA02 3525lfa 1 EFFICIENCY (%)LTC3525L-3 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) TOP VIEW V , V Voltage ......................................... 0.3V to 6V IN OUT SHDN 1 6 SW SW Voltage .................................................. 0.3V to 6V GND 2 5 GND SW Voltage < 100ns ..................................... 0.3V to 7V V 3 4 V IN OUT SHDN Voltage .............................................. 0.3V to 6V Operating Temperature Range SC6 PACKAGE 6-LEAD PLASTIC SC70 (Notes 2, 5) ..............................................40C to 85C T = 125C JMAX Storage Temperature Range .................. 65C to 125C = 120C/W ON BOARD OVER GROUND PLANE JA Lead Temperature (Soldering, 10 sec) ...................300C ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3525LESC6-3 PBF LTC3525LESC6-3 TRPBF LCPY 6-Lead Plastic SC70 40C to 85C 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: