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ADI LTC3890IUH#TRPBF product image
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ADI LTC3890IUH#TRPBF

Manufacturer
ADI
MPN
LTC3890IUH#TRPBF
LCSC Part #
C686985
Packaging
QFN-32-EP(5x5)
Customer #
Key Attributes
60V Low lQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller
DatasheetADI LTC3890IUH#TRPBF
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
PackagingQFN-32-EP(5x5)
Synchronous RectifierYes
FeaturesAdjustable current limiting;Adjustable soft-start;Operating status indication;Built-in LDO regulator;Frequency synchronization;Light load efficient mode;Output voltage tracking
Number of Channels2
TopologyBuck
Operating Voltage4V~60V
Switch tube (built-in/external)External
Output Voltage800mV~24V
Operating Temperature-40℃~+125℃@(TJ)
Output Current-
Frequency - Switching50kHz~900kHz
Output TypeAdjustable
FunctionStep-down type
Quiescent Current50uA
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Introduction

AI Translation

The LTC3890 is a high performance dual step-down switching regulator DC/DC controller that drives all N-channel synchronous power MOSFET stages. A constant frequency current mode architecture allows a phaselockable frequency of up to 850kHz. Power loss and noise due to the ESR of the input capacitor 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. OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. The LTC3890 features a precision 0.8V reference and power good output indicators. A wide 4V to 60V 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 conduction mode at light loads.

Features

AI Translation
  • Wide VIN Range: 4V to 60V (65V Abs Max)
  • Low Operating IQ: 50µA (One Channel On)
  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
  • RSENSE or DCR Current Sensing
  • Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
  • Phase-Lockable Frequency (75kHz to 850kHz)
  • Programmable Fixed Frequency (50kHz to 900kHz)
  • Selectable Continuous, Pulse-Skipping or Low Ripple Burst Mode Operation at Light Loads
  • Selectable Current Limit
  • Very Low Dropout Operation: 99% Duty Cycle
  • Adjustable Output Voltage Soft-Start or Tracking
  • Power Good Output Voltage Monitors
  • Output Overvoltage Protection
  • Low Shutdown IQ < 14µA
  • Internal LDO Powers Gate Drive from VIN or EXTVCC
  • No Current Foldback During Start-Up
  • Small Low Profile (0.75mm) 5mm × 5mm QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Applications

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