Datasheet Analog Devices LTC7817EUHF#PBF — Ficha de datos

LTC7817
40V, Low IQ, 3MHz,
Triple Output Buck/Buck/Boost Synchronous Controller
DESCRIPTION FEATURES Dual Buck Plus Single Boost Synchronous Controllers
n Low Operating I :
Q 14μA (14V to 3.3V, Channel 1 On)
n Outputs Remain in Regulation Through Cold Crank
Down to 1V Input Supply Voltage
n Wide Bias Input Voltage Range: 4.5V to 40V
n Buck and Boost Output Voltages up to 40V
n R
SENSE or DCR Current Sensing
n Pass-Thru™ Operation: 100% Duty Cycle for
Boost Synchronous MOSFET
n Programmable Fixed Frequency (100kHz to 3MHz)
n Phase-Lockable Frequency (100kHz to 3MHz)
n Selectable Continuous, Pulse-Skipping, or Low
Ripple Burst Mode Operation at Light Loads
n Very Low Buck Dropout Operation: 99% Duty Cycle
n Low Shutdown I : 1.5μA
Q
n Small 38-Lead 5mm × 7mm QFN Package
n AEC-Q100 Automotive Qualification in Process The LTC®7817 is a high performance triple output (buck/ …