Datasheet LT8645S-2 (Analog Devices) - 28

LT8645S-2
TYPICAL APPLICATIONS 1.8V, 8A Step-Down Converter
VIN 3.4V TO 30V (65V TRANSIENT) 4.7µF EN/UV VIN VIN 0.47µF 0.47µF 0805 0805 GND GND BST LT8645S-2 0.1µF 0.82µH VOUT SW 1.8V 10nF EXTERNAL 8A TR/SS BIAS SOURCE >3.1V 1µF 1µF OR GND 4.7pF 866k 47µF X2 INTVCC FB 1210 41.2k X5R/X7R RT GND 1M 8640S-2 TA02 fSW = 1MHz L: XEL6030 PINS NOT USED IN THIS CIRCUIT: CLKOUT, PG, SYNC/MODE
RELATED PARTS PART NUMBER DESCRIPTION COMMENTS
LT8645S/ 65V, 8A, Synchronous Step-Down Silent Switcher 2 with IQ = 2.5μA VIN(MIN) = 3.4V, VIN(MAX) = 65V, VOUT(MIN) = 0.97V, IQ = LT8646S 2.5µA, ISD < 1µA, 6mm × 4mm LQFN-32 LT8640S/ 42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent VIN(MIN) = 3.4V, VOUT(MAX) = 42V, VOUT(MIN) = 0.97V, LT8643S Current IQ = 2.5μA, ISD < 1μA, 4mm × 4mm LQFN-24 LT8640/ 42V, 5A, 96% Efficiency, 3MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, LT8640-1 DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, 3mm × 4mm QFN-18 LT8641 65V, 3.5A, 95% Efficiency, 3MHz Synchronous MicroPower Step-Down VIN(MIN) = 3V, VIN(MAX) = 65V, VOUT(MIN) = 0.81V, DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, 3mm × 4mm QFN-18 LT8609/ 42V, 2A, 94% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3V, VIN(MAX) = 42V, VOUT(MIN) = 0.8V, LT8609A DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, MSOP-10E LT8610A/ 42V, 3.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, LT8610AB DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, MSOP-16E LT8610AC 42V, 3.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3V, VIN(MAX) = 42V, VOUT(MIN) = 0.8V, DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, MSOP-16E LT8610 42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, MSOP-16E LT8611 42V, 2.5A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, DC/DC Converter with IQ = 2.5µA and Input/Output Current Limit/Monitor IQ = 2.5μA, ISD < 1μA, 3mm × 5mm QFN-24 LT8616 42V, Dual 2.5A + 1.5A, 95% Efficiency, 2.2MHz Synchronous MicroPower VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.8V, Step-Down DC/DC Converter with IQ = 5µA IQ = 5μA, ISD < 1μA, TSSOP-28E, 3mm × 6mm QFN-28 LT8620 65V, 2.5A, 94% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 65V, VOUT(MIN) = 0.97V, DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, MSOP-16E, 3mm × 5mm QFN-24 LT8614 42V, 4A, 96% Efficiency, 2.2MHz Synchronous Silent Switcher Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, DC/DC Converter with IQ = 2.5µA IQ = 2.5μA, ISD < 1μA, 3mm × 4mm QFN18 LT8612 42V, 6A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, DC/DC Converter with IQ = 2.5µA IQ = 3.0μA, ISD < 1μA, 3mm × 6mm QFN-28 LT8613 42V, 6A, 96% Efficiency, 2.2MHz Synchronous MicroPower Step-Down VIN(MIN) = 3.4V, VIN(MAX) = 42V, VOUT(MIN) = 0.97V, DC/DC Converter with Current Limiting IQ = 3.0μA, ISD < 1μA, 3mm × 6mm QFN-28 LT8602 42V, Quad Output (2.5A + 1.5A + 1.5A + 1.5A) 95% Efficiency, 2.2MHz VIN(MIN) = 3V, VIN(MAX) = 42V, VOUT(MIN) = 0.8V, Synchronous MicroPower Step-Down DC/DC Converter with IQ = 25µA IQ = 2.5μA, ISD < 1μA, 6mm × 6mm QFN-40 Rev 0 28 08/19 www.analog.com For more information www.analog.com ANALOG DEVICES, INC. 2019 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Applications Related Parts