Analog Devices LTC7815

Description

The LTCR7815 is a high performance 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 2.25MHz. The LTC7815 operates from a wide 4.5V to 38V input supply range. When biased from the output of the boost converter or another auxiliary supply, the LTC7815 can operate from an input supply as low as 2.5V after start-up. The 28μA no-load quiescent current extends operating-runtime in battery powered systems. OPTI-LOOP compensation-allows the transient response to be optimized-over a wide range of output capacitance and ESR values.-The LTC7815 features a precision 0.8V reference for the-bucks, 1.2V reference for the boost and a power good-output indicator. The PLLIN/MODE pin selects among-Burst Mode operation, pulse-skipping mode, or continuous-inductor current mode at light loads.-

Features

• 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)

Typical applications

• Distributed DC Power Systems
• Automotive Always-On and Start-Stop Systems
• Multioutput Buck-Boost Applications
• Battery Operated Digital Devices

More information

• Datasheet
• IC product information