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LTC3857EUH#PBF - 

DC/DC Controller, High Performance, 2-Phase, 4V to 38V, 2 Outputs, Synchronous Buck, 850kHz, QFN-32

LINEAR TECHNOLOGY LTC3857EUH#PBF

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Manufacturer Part No:
LTC3857EUH#PBF
Order Code:
2115877
Technical Datasheet:
(EN)
See all Technical Docs

Product Information

:
QFN
:
-40°C
:
125°C
:
99.4%
:
32Pins
:
-
:
Buck (Step Down)
:
-
:
4V
:
585kHz
:
Cut Tape
:
38V
:
2 Output
:
MSL 1 - Unlimited
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Product Overview

The LTC3857EUH#PBF is a high-performance dual step-down Switching Regulator Controller drives all N-channel synchronous power MOSFET stages. The constant frequency current-mode architecture allows a phase-lockable frequency of up to 850kHz. Power loss and noise due to the ESR of the input capacitor ESR are minimized by operating the two controller output stages out of phase. The 50µA no-load quiescent current extends operating run time in battery-powered systems. It features a precision 0.8V reference and power good output indicators. A wide 4 to 38V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. Independent TRACK/SS pins for each controller ramp the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. The PLLIN/MODE pin selects among burst mode operation, pulse-skipping mode, or continuous inductor current-mode at light loads.
  • Out-of-phase controllers reduce required input capacitance and power supply induced noise
  • OPTI-LOOP® Compensation minimizes COUT
  • Selectable current limit
  • Adjustable output voltage soft-start or tracking
  • Power good output voltage monitors
  • Output overvoltage protection
  • No current foldback during start-up

Applications

Automotive, Power Management