Datasheet Linear Technology LTC3899HUHF#PBF — Datenblatt

LTC3899
60V Low IQ, Triple
Output, Buck/Buck/Boost
Synchronous Controller
DESCRIPTION FEATURES Dual Buck Plus Single Boost Synchronous Controllers
n Wide Bias Input Voltage Range: 4.5V to 60V
n Outputs Remain in Regulation Through Cold Crank
Down to a 2.2V Input Supply Voltage
n Buck and Boost Output Voltages Up to 60V
n Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
n No External Bootstrap Diodes Required
n Low Operating I : 29μA (One Channel On)
Q
n 100% Duty Cycle for Boost Synchronous MOSFET
n Phase-Lockable Frequency (75kHz to 850kHz)
n Programmable Fixed Frequency (50kHz to 900kHz)
n Very Low Dropout Operation: 99% Duty Cycle (Bucks)
n Low Shutdown I : 3.6μA
Q
n Fixed or Adjustable Boost Output Voltage Saves I
Q
n Small 38-Lead 5mm × 7mm QFN and TSSOP Packages The LTC®3899 is a high performance triple output (buck/
buck/boost) DC/DC switching regulator controller that …