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LTC3111 Datasheet(PDF) 1 Page - Linear Technology |
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LTC3111 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  LTC3111 1 3111fa For more information www.linear.com/LTC3111 LOAD CURRENT (A) 0.0001 70 80 90 100 0.001 1 10 0.01 0.1 3111 TA01b 60 50 40 30 VIN = 2.7V VIN = 5V VIN = 12V BURST PWM TYPICAL APPLICATION FEATURES DESCRIPTION 15V, 1.5A Synchronous Buck-Boost DC/DC Converter The LTC®3111 is a fixed frequency, synchronous buck- boost DC/DC converter with an extended input and output range. The unique 4-switch, single inductor architecture provides low noise and seamless operation from input voltages above, below or equal to the output voltage. Withaninputandoutputrangeof2.5Vto15V,theLTC3111 is well suited for a wide variety of single or multiple-cell batteries,back-upcapacitororwalladaptersourceapplica- tions. Low RDS(ON) internal N-channel MOSFET switches and selectable PWM or Burst Mode operation produce high efficiency over a wide range of operating conditions. An accurate RUN pin allows the user to program the turn-on threshold voltage of the converter. Other features include: short-circuit protection, internal soft-start and thermal shutdown. The LTC3111 is offered in both thermally enhanced 14-lead (3mm × 4mm × 0.75mm) DFN and 16-lead MSOP packages. 5V, 800kHz Wide Input Voltage Buck-Boost Regulator APPLICATIONS n Regulated Output with VIN Above, Below or Equal to VOUT n 2.5V to 15V Input and Output Voltage Range n 1.5A Continuous Output Current: VIN ≥ 5V, VOUT = 5V, PWM Mode n Single Inductor n Accurate RUN Threshold n Up to 95% Efficiency n 800kHz Switching Frequency, Synchronizable Between 600kHz and 1.5MHz n 49µA No-Load Quiescent Current in Burst Mode® Operation n Output Disconnect in Shutdown n Shutdown Current < 1µA n Internal Soft-Start n Small, Thermally Enhanced 14-Lead (3mm × 4mm × 0.75mm) DFN and 16-Lead MSOP Packages n 3.3V or 5V from 1, 2 or 3 Li-Ion, Multiple-Cell Alkaline/NiMH Batteries n RF Transmitters n Military, Industrial Power Systems L , LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, LTspice are registered trademarks and No RSENSE and PowerPath are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6404251, 6166527, 5481178, 6304066, 6580258. SW1 0.1µF 27pF 1µF 33pF 1M 191k 3111 TA01a 20k 680pF 26.1k 0.1µF VIN 2.5V TO 15V 4.7µH SW2 BST1 BST2 VIN LTC3111 PGND SGND VOUT 22µF VOUT 5V 1.5A (VIN > 5V) 10µF PWM/SYNC BURST PWM RUN FB VCC SNSGND COMP OFF ON Efficiency at 5VOUT |
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Similar Description - LTC3111 |
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