Datasheet Analog Devices LTC7818HUJ#WTRPBF — 数据表

LTC7818
40V, Low IQ, 3MHz,
Triple Output Buck/Buck/Boost Synchronous Controller
DESCRIPTION
FEATURES
The LTC®7818 is a high performance triple output (buck/
buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages.
Its constant-frequency current mode architecture allows
a phase-lockable switching frequency of up to 3MHz.
The LTC7818 operates from a wide 4.5V to 40V input
supply range. When biased from the output of the boost
converter or another auxiliary supply, the LTC7818 can
operate from an input supply as low as 1V after start-up. Dual Buck Plus Single Boost Synchronous Controllers
n Low Operating I :
Q
n 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 Spread Spectrum Operatio R
SENSE or DCR Current Sensing
n Programmable Fixed Frequency (100kHz to 3MHz) …

LTC7818
40V, Low IQ, 3MHz,
Triple Output Buck/Buck/Boost Synchronous Controller
DESCRIPTION
FEATURES The LTC®7818 is a high performance triple output (buck/
buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages.
Its constant frequency current mode architecture allows
a phase-lockable switching frequency of up to 3MHz.
The LTC7818 operates from a wide 4.5V to 40V input
supply range. When biased from the output of the boost
converter or another auxiliary supply, the LTC7818 can
operate from an input supply as low as 1V after start-up. 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 Spread Spectrum Operatio R
SENSE or DCR Current Sensing
n 100% Duty Cycle for Boost Synchronous MOSFET
n Programmable Fixed Frequency (100kHz to 3MHz)
n Phase-Lockable Frequency (100kHz to 3MHz) …