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LT3154AVPBF Datasheet(PDF) 1 Page - Analog Devices |
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LT3154AVPBF Datasheet(HTML) 1 Page - Analog Devices |
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1 / 32 page  LT3154 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION 6A Low Noise, High Performance Buck-Boost DC/DC Converter The LT®3154 is a highly efficient, high current, buck‑boost DC/DC converter that operates from input voltages above, below or equal to the regulated output voltage. The LT3154’s advanced topology provides a continu‑ ous transfer through all operating modes. VIN operation from 1.8V to 5.5V provides flexibility for a wide variety of power sources. The output voltage is adjustable between 1.8V to 5.5V. To minimize external components the LT3154 can be configured to operate from a 2.2MHz internal oscillator. To optimize applications for highest efficiency or small‑ est footprint the oscillator can be programmed between 400kHz to 4MHz, or synchronized to an external clock for noise sensitive circuits. Selectable Burst Mode operation reduces quiescent cur‑ rent to 15μA, ensuring high efficiency across the entire load range. The VIN start‑up threshold (UVLO) can be adjusted for various input sources. An internal or exter‑ nally programmable soft‑start limits inrush current during start‑up. Other features include <1μA shutdown current, short circuit, and thermal overload protection. The LT3154 is housed in the thermally enhanced 16‑lead (3mm × 3mm × 0.75mm) LQFN package. Efficiency vs VIN PWM Mode APPLICATIONS n Single Inductor Buck-Boost Architecture n Low Noise Buck-Boost Architecture n Wide VIN Range 1.8V to 5.5V n Adjustable VOUT Range 1.8V to 5.5V n 5A of Continuous Output Current with VIN > VOUT n Up to 95% Efficiency n Selectable Internal 2.2MHz Fixed Frequency Adjustable and Synchronizable: Up to 4MHz n Burst Mode® IQ 15µA for High Efficiency at Light Loads n Programmable Soft‑Start and VIN UVLO n Simple Solution with Minimal External Components n Portable Inventory Terminals n Handheld Computers n Medical and Industrial Instruments n Wireless RF Transmitter n Backup Power Applications n Battery Powered Systems All registered trademarks and trademarks are the property of their respective owners. 4A 3A 2A 1A 0.5A INPUT VOLTAGE (V) 1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 5.4 5.8 80 82 84 86 88 90 92 94 96 98 3154 TA01b LOAD CURRENT 2.2MHz OPERATION VOUT 3.3V VIN 1.8V TO 5.5V BURST 3154 TA01a PWM 22µF 100µF 1nF 40.2k 100k 232k 0.68µH EN/UVLO LT3154 RT SS FB VC GND SW1 SW2 PGND SYNC/MODE PVOUT VOUT PVIN VIN |
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