Power by Linear/Analog Devices’ LTC7815EUHFPBF is a triple output (buck/buck/boost) synchronous DC/DC switching regulator controller that drives all N-channel power MOSFET stages. Constant frequency current mode architecture allows a phase-lockable switching frequency of up to 2.25 MHz. This regulator LTC7815EUHFPBF operates from a wide 4.5 V to 38 V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC7815EUHFPBF can operate from an input supply as low as 2.5 V after start-up.
Feature
- Dual Buck Plus Single Boost Synchronous Controllers
- Wide Bias Input Voltage Range: 4.5V to 38V
- Outputs Remain in Regulation Through Cold Crank Down to a 2.5V Input Supply Voltage
- Buck Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
- Boost Output Voltage Up to 60V
- Low Operating IQ: 28μA (One Channel On)
- RSENSE or DCR Current Sensing
- 100% Duty Cycle for Boost Synchronous MOSFET Even in Burst Mode® Operation
- Phase-Lockable Frequency (320kHz to 2.25MHz)
- Programmable Fixed Frequency (320kHz to 2.25MHz)
- Very Low Buck Dropout Operation: 98% Duty Cycle
- Small 38-Lead 5mm × 7mm QFN Package
Applications
- Automotive Always-On and Start-Stop Systems
- Battery Operated Digital Devices
- Distributed DC Power Systems
- Multioutput Buck-Boost Applications
