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LINEAR TECHNOLOGY  LTC3857EUH#PBF  DC/DC Controller, High Performance, 2-Phase, 4V to 38V, 2 Outputs, Synchronous Buck, 850kHz, QFN-32

LINEAR TECHNOLOGY LTC3857EUH#PBF
Manufacturer Part No:
LTC3857EUH#PBF
Order Code:
2115877
Technical Datasheet:
See all Technical Docs

Image is for illustrative purposes only. Please refer to product description.

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

Product Information

Supply Voltage Min:
4V
Supply Voltage Max:
38V
No. of Outputs:
2 Output
Duty Cycle (%):
99.4%
Controller IC Case Style:
QFN
No. of Pins:
32Pins
Switching Frequency:
585kHz
Topology:
Buck (Step Down)
Operating Temperature Min:
-40°C
Operating Temperature Max:
125°C
Packaging:
Cut Tape
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (17-Dec-2015)

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Applications

  • Automotive
  • Power Management

Legislation and Environmental

Country of Origin:
United States

Country in which last significant manufacturing process was carried out

RoHS Compliant:
Yes
Tariff No:
85423990
Weight (kg):
.00011