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ANALOG DEVICES LTC3891EUDC#TRPBF
DC/DC Controller, Synchronous Buck, 4V to 60V Supply, 1 Output, 99% Duty Cycle, 835kHz, QFN-EP-20
- Manufacturer:
- ANALOG DEVICES ANALOG DEVICES
- Manufacturer Part No:
- LTC3891EUDC#TRPBF
- Order Code:
- 4026578
-
- Technical Datasheet:
- LTC3891EUDC#TRPBF Datasheet
- ECAD / MCAD
-
Product Overview
LTC®3891 is a high performance step-down switching regulator DC/DC controller that drives an all N-channel synchronous power MOSFET stage. A constant frequency current mode architecture allows a phase-lockable frequency of up to 750KHz. The 50µA no-load quiescent current extends operating run time 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 LTC3891 features a precision 0.8V reference and power good output indicator. A wide 4V to 60V input supply range encompasses a wide range of intermediate bus voltages and battery chemistries. The output voltage of the LTC3891 can be programmed between 0.8V to 24V. The TRACK/SS pin ramps the output voltages during start-up. Current foldback limits MOSFET heat dissipation during short-circuit conditions. Applications include automotive always-on systems, battery powered digital devices, distributed DC power systems.
- Wide VIN range from 4V to 60V (65V abs max)
- Wide output voltage range from 0.8V <= VOUT <= 24V
- RSENSE or DCR current sensing, phase-lockable frequency (75KHz to 750KHz)
- Programmable fixed frequency (50KHz to 900KHz)
- Selectable continuous, pulse-skipping or low ripple, Burst Mode® operation at light load
- Selectable current limit, very low dropout operation of 99% duty cycle
- Adjustable output voltage soft-start or tracking, power good output voltage monitor
- Output overvoltage protection, low shutdown IQ of < 14µA, no current foldback during start-Up
- Internal LDO powers gate drive from VIN or EXTVCC
- 20-lead (3mm × 4mm) plastic QFN package, -40°C to 125°C temperature range
Product Information
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- :
- 4V
- :
- 60V
- :
- 1 Output
- :
- 99%
- :
- QFN-EP
- :
- 20Pins
- :
- 835kHz
- :
- Synchronous Buck (Step Down)
- :
- -40°C
- :
- 125°C
- :
- -
- :
- -
- :
- MSL 1 - Unlimited
Technical Documents (1)
Packaging type
Cut Tape
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Php581.20
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