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ADI LTC3891MPFE#PBF product image
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ADI LTC3891MPFE#PBF

Manufacturer
ADI
MPN
LTC3891MPFE#PBF
LCSC Part #
C687006
Packaging
TSSOP-20-EP
Customer #
Key Attributes
1 Adjustable 800mV~24V Step-down type TSSOP-20-EP DC DC Switching Controllers RoHS
DatasheetADI LTC3891MPFE#PBF
RoHS Compliance1 documents available
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerADI
PackagingTSSOP-20-EP
Operating Temperature-55℃~+150℃@(TJ)
Synchronous RectifierYes
FeaturesAdjustable current limiting;Adjustable soft-start;Operating status indication;Frequency synchronization;Light load efficient mode;Overcurrent Protection;Built-in LDO regulator;Output voltage tracking
Output Current-
Number of Channels1
TopologyBuck
Frequency - Switching835kHz;535kHz
Operating Voltage4V~60V
Output TypeAdjustable
Switch tube (built-in/external)External
Output Voltage800mV~24V
FunctionStep-down type
Quiescent Current50uA
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Introduction

AI Translation

The LTC3891 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. The PLLIN/MODE pin selects among Burst Mode operation, pulse-skipping mode, or continuous conduction mode at light loads.

Features

AI Translation
  • Wide VIN Range: 4V to 60V (65V Abs Max)
  • Low Operating IQ: 50μA
  • Wide Output Voltage Range: 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: 99% Duty Cycle
  • Adjustable Output Voltage Soft-Start or Tracking
  • Power Good Output Voltage Monitor
  • Output Overvoltage Protection
  • Low Shutdown Iq < 14μA
  • Internal LDO Powers Gate Drive from VIN or EXTVCC
  • No Current Foldback During Start-Up
  • Small 20-Pin 3mm × 4mm QFN and TSSOP Packages

Applications

AI Translation
  • Automotive Always-On Systems
  • Battery Powered Digital Devices
  • Distributed DC Power Systems