Datasheet Analog Devices LTC3859ALMPUHF#TRPBF — Datenblatt

LTC3859AL
Triple Output,
Buck/Buck/Boost Synchronous
Controller with 28µA Burst Mode IQ
DESCRIPTION FEATURES Low Operating IQ: 28μA (One Channel On)
n Dual Buck Plus Single Boost Synchronous Controllers
n Outputs Remain in Regulation Through Cold Crank
Down to 2.5V
n Wide Bias Input Voltage Range: 4.5V to 38V
n Buck Output Voltage Range: 0.8V ≤ V
OUT ≤ 24V
n Boost Output Voltage Up to 60V
n R
SENSE or DCR Current Sensing
n 100% Duty Cycle for Boost Synchronous MOSFET
Even in Burst Mode® Operatio Phase-Lockable Frequency (75kHz to 850kHz)
n Programmable Fixed Frequency (50kHz to 900kHz)
n Selectable Continuous, Pulse-Skipping or Low Ripple
Burst Mode Operation at Light Loads
n Very Low Buck Dropout Operation: 99% Duty Cycle
n Adjustable Output Voltage Soft-Start or Tracking
n Low Shutdown I : 10μA
Q …

LTC3859AL
Triple Output,
Buck/Buck/Boost Synchronous
Controller with 28ВµA Burst Mode IQ
Description Features Low Operating IQ: 28ОјA (One Channel On)
n Dual Buck Plus Single Boost Synchronous Controllers
n Outputs Remain in Regulation Through Cold Crank
Down to 2.5V
n Wide Bias Input Voltage Range: 4.5V to 38V
n Buck Output Voltage Range: 0.8V ≤ V
OUT ≤ 24V
n Boost Output Voltage Up to 60V
n R
SENSE or DCR Current Sensing
n 100% Duty Cycle for Boost Synchronous MOSFET
Even in Burst ModeВ® Operatio Phase-Lockable Frequency (75kHz to 850kHz)
n Programmable Fixed Frequency (50kHz to 900kHz)
n Selectable Continuous, Pulse-Skipping or Low Ripple
Burst Mode Operation at Light Loads
n Very Low Buck Dropout Operation: 99% Duty Cycle
n Adjustable Output Voltage Soft-Start or Tracking
n Low Shutdown I : 10ОјA
Q …