POWER LOSS (W) LTC3410 2.25MHz, 300mA Synchronous Step-Down Regulator in SC70 FEATURES DESCRIPTIO High Efficiency: Up to 96% The LTC 3410 is a high efficiency monolithic synchro- Low Ripple (20mV ) Burst Mode Operation: I 26A nous buck regulator using a constant frequency, current P-P Q Low Output Voltage Ripple mode architecture. The device is available in adjustable 300mA Output Current at V = 3V and fixed output voltage versions. Supply current during IN 380mA Minimum Peak Switch Current operation is only 26A, dropping to <1A in shutdown. 2.5V to 5.5V Input Voltage Range The 2.5V to 5.5V input voltage range makes the LTC3410 2.25MHz Constant Frequency Operation ideally suited for single Li-Ion battery-powered applica- No Schottky Diode Required tions. 100% duty cycle provides low dropout operation, Low Dropout Operation: 100% Duty Cycle extending battery life in portable systems. Stable with Ceramic Capacitors Switching frequency is internally set at 2.25MHz, allowing 0.8V Reference Allows Low Output Voltages the use of small surface mount inductors and capacitors. Shutdown Mode Draws < 1A Supply Current The LTC3410 is specifically designed to work well with 2% Output Voltage Accuracy ceramic output capacitors, achieving very low output Current Mode Operation for Excellent Line and voltage ripple and a small PCB footprint. Load Transient Response Overtemperature Protected The internal synchronous switch increases efficiency and Available in Low Profile SC70 Package eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.8V feed- U APPLICATIO S back reference voltage. The LTC3410 is available in a tiny, low profile SC70 package. Cellular Telephones , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All Wireless and DSL Modems other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131, 5994885. Digital Cameras MP3 Players Portable Instruments TYPICAL APPLICATIO Efficiency and Power Loss vs Output Current 100 1 90 4.7H V IN V OUT 80 2.7V V SW IN 0.1 2.5V 10pF EFFICIENCY C TO 5.5V IN 70 C OUT LTC3410 4.7F 4.7F CER 60 RUN CER 50 0.01 V FB 887k POWER LOSS 40 GND 412k 30 0.001 3410 TA01a V = 2.7V IN 20 V = 3.6V IN 10 V = 4.2V IN 0.0001 0 0.1 1 10 100 1000 OUTPUT CURRENT (mA) 3410 TA01b 3410fb 1 EFFICIENCY (%) U ULTC3410 ABSOLUTE AXI U RATI GS (Note 1) Input Supply Voltage .................................. 0.3V to 6V Peak SW Sink and Source Current .................... 630mA RUN, V Voltages ..................................... 0.3V to V Operating Temperature Range (Note 2) .. 40C to 85C FB IN SW Voltage (DC) ......................... 0.3V to (V + 0.3V) Junction Temperature (Notes 3, 5) ...................... 125C IN P-Channel Switch Source Current (DC) ............. 500mA Storage Temperature Range ................ 65C to 150C N-Channel Switch Sink Current (DC) ................. 500mA Lead Temperature (Soldering, 10 sec)................. 300C UUW PACKAGE/ORDER I FOR ATIO TOP VIEW TOP VIEW RUN 1 6 V RUN 1 6 V FB OUT GND 2 5 GND GND 2 5 GND SW 3 4 V SW 3 4 V IN IN SC6 PACKAGE SC6 PACKAGE 6-LEAD PLASTIC SC70 6-LEAD PLASTIC SC70 T = 125C, = 250C/ W T = 125C, = 250C/ W JMAX JA JMAX JA ORDER PART NUMBER SC6 PART MARKING ORDER PART NUMBER SC6 PART MARKING LTC3410ESC6 LBSD LTC3410ESC6-1.2 LCHV LTC3410ESC6-1.5 LCNB LTC3410ESC6-1.65 LCJF LTC3410ESC6-1.8 LCNC LTC3410ESC6-1.875* LCFQ Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: