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ADI LTC3851AIMSE-1#PBF product image
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ADI LTC3851AIMSE-1#PBFRoHS

Manufacturer
ADI
MPN
LTC3851AIMSE-1#PBF
LCSC Part #
C686328
Packaging
MSOP-16-EP
Customer #
Key Attributes
1 800mV~5.5V Adjustable Step-down type MSOP-16-EP DC DC Switching Controllers RoHS
Datasheetpdf iconADI LTC3851AIMSE-1#PBF
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QtyUnit Price(Reference Only)Total Amount
1+$ 3.7931$ 3.79
200+$ 1.4686$ 293.72
500+$ 1.4168$ 708.40
1,000+$ 1.3908$ 1390.80
Standard Packaging37/Full Tube
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Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/DC DC Switching Controllers
ManufacturerADI
PackagingMSOP-16-EP
Synchronous RectifierYes
FeaturesAdjustable soft-start;Output voltage tracking;Light load efficient mode;Frequency synchronization;Operating status indication;Overcurrent Protection;Built-in LDO regulator
Number of Channels1
TopologyBuck
Operating Voltage4V~38V
Switch tube (built-in/external)External
Output Voltage800mV~5.5V
Operating Temperature-40℃~+125℃
Output Current-
Frequency - Switching235kHz;500kHz;750kHz
Output TypeAdjustable
FunctionStep-down type
Quiescent Current20uA
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Introduction

AI Translation

The LTC3851A-1 is a high performance synchronous step-down switching regulator 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. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3851A-1 features a precision 0.8 reference and a power good indicator. A wide 4V to 38V (40V absolute maximum) input supply range encompasses most battery configurations and intermediate bus voltages. The TK/SS pin ramps the output voltage during start‑up and shutdown with coincident or ratiometric tracking. Current foldback limits MOSFET heat dissipation during shortcircuit conditions. The MODE/PLLIN pin selects among Burst Mode operation, pulse-skipping mode or continuous inductor current mode at light loads and allows the IC to be synchronized to an external clock. The LTC3851A-1 contains an improved PLL compared to the LTC3851-1. The LTC3851A-1 is identical to the LTC3851A except that the ILIM pin is replaced by PGOOD.

Features

AI Translation
  • Wide VIN Range: 4V to 38V Operation
  • RSENSE or DCR Current Sensing
  • ±1% Output Voltage Accuracy
  • Power Good Output Voltage Monitor
  • Phase-Lockable Fixed Frequency: 250kHz to 750kHz
  • Dual N-Channel MOSFET Synchronous Drive
  • Very Low Dropout Operation: 99% Duty Cycle
  • Adjustable Output Voltage Soft-Start or Tracking
  • Output Current Foldback Limiting
  • Output Overvoltage Protection
  • OPTI-LOOP Compensation Minimizes COUT
  • Selectable Continuous, Pulse-Skipping or Burst Mode Operation at Light Loads
  • Low Shutdown IQ: 20µA
  • VOUT Range: 0.8V to 5.5V
  • Thermally Enhanced 16-Lead MSOP or 3mm × 3mm QFN Package

Applications

AI Translation
  • Automotive Systems
  • Telecom Systems
  • Industrial Equipment
  • Distributed DC Power Systems