LTC3113 3A Low Noise Buck-Boost DC/DC Converter FEATURES DESCRIPTION n Regulated Output with Input Voltage Above, Below The LTC 3113 is a wide V range, highly ef cient, xed IN or Equal to the Output Voltage frequency, buck-boost DC/DC converter that operates n 1.8V to 5.5V Input and Output Voltage Range from input voltages above, below or equal to the output n 3A Continuous Output Current V > 3.0V, V = 3.8V voltage. The topology incorporated in the IC provides low IN OUT n 1.5A Continuous Output Current for V 1.8V, noise operation, making it well suited for RF and precision IN V = 3.3V measurement applications. OUT n Single Inductor The LTC3113 can deliver up to 3A of continuous output n Low Noise Buck-Boost Architecture current to satisfy the most demanding applications. n Up to 96% Ef ciency Higher output current is possible in stepdown (buck) n Programmable Frequency from 300kHz to 2MHz mode. Integrated low R power MOSFETs and a DS(ON) n Selectable Burst Mode Operation programmable switching frequency up to 2MHz result n Output Disconnect in Shutdown in a compact solution footprint. Selectable Burst Mode n Shutdown Current: <1A operation improves ef ciency at light loads. n Internal Soft-Start n Other features include <1A shutdown current, integrated Small, Thermally Enhanced 16-Lead soft-start, short-circuit protection, current limit and ther- (4mm 5mm 0.75mm) DFN Package mal overload protection. The LTC3113 is housed in the and 20-Lead TSSOP Package thermally enhanced 16-lead (4mm 5mm 0.75mm) DFN and 20-lead TSSOP packages. APPLICATIONS L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks n Wireless Modems and No R , PowerPath are trademarks of Linear Technology Corporation. All other SENSE trademarks are the property of their respective owners. n Backup Power Systems n Portable Inventory Terminals n Portable Barcode Readers n Portable Instrumentation Ef ciency vs Input Voltage TYPICAL APPLICATION 100 Li-Ion to 3.8V/3A V = 3.8V OUT 95 I = 1A LOAD 2.2H 90 85 I = 3A LOAD SW1 SW2 V OUT 80 V IN V V 3.8V IN OUT 3V TO 4.2V 75 3A 47F 100F LTC3113 845k 6.49k 70 OFF ON RUN FB 47pF 65 PWM BURST BURST VC 49.9k 60 RT 158k 680pF SGND PGND 55 3113 TA01a 90.9k 50 12pF 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) 3113 TA01b 3113f 1 EFFICIENCY (%)LTC3113 ABSOLUTE MAXIMUM RATINGS (Notes 1, 3) V , V , SW1, SW2 Voltage (DC) .............. 0.3V to 6V Operating Junction Temperature Range IN OUT SW1, SW2 Voltage, Pulsed (<100ns) (Note 4) ............7V (Notes 2, 5) ............................................ 40C to 125C VC, RUN, BURST Voltage ............................. 0.3V to 6V Maximum Junction Temperature........................... 125C FB ................................................................0.3V to V Storage Temperature Range ................... 65C to 150C IN RT Voltage.................................................... 0.3V to 1V Lead Temperature (Soldering, 10 sec) TSSOP ..............................................................300C PIN CONFIGURATION TOP VIEW TOP VIEW PGND 1 20 PGND V 1 16 SW2 V 2 19 SW2 OUT OUT V 2 15 SW2 V 3 18 SW2 OUT OUT V 3 14 SW1 V 4 17 SW1 IN IN V 4 13 SW1 V 5 16 SW1 IN 17 IN 21 PGND PGND V 5 12 SW1 V 6 15 SW1 IN IN SGND 6 11 RUN SGND 7 14 RUN BURST 7 10 FB BURST 8 13 FB RT 8 9 VC RT 9 12 VC PGND 10 11 PGND DHD PACKAGE 16-LEAD (5mm s 4mm) PLASTIC DFN FE PACKAGE T = 125C, = 36.5C/W, = 3.6C/W 20-LEAD PLASTIC TSSOP JMAX JA JC EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB T = 125C, = 31.5C/W, = 4.1C/W JMAX JA JC EXPOSED PAD (PIN 21) IS PGND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LTC3113EDHD PBF LTC3113EDHD TRPBF 3113 40C to 125C 16-Lead (5mm 4mm) Plastic DFN LTC3113IDHD PBF LTC3113IDHD TRPBF 3113 16-Lead (5mm 4mm) Plastic DFN 40C to 125C LTC3113EFE PBF LTC3113EFE TRPBF LTC3113FE 20-Lead Plastic TSSOP 40C to 125C LTC3113IFE PBF LTC3113IFE TRPBF LTC3113FE 20-Lead Plastic TSSOP 40C to 125C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. *The temperature grade is identi ed by a label on the shipping container. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: