LTC3858-2

RECOMMENDED FOR NEW DESIGNS

Low IQ, Dual 2-Phase Synchronous Step-Down Controller

Part Models
4
1ku List Price
Starting From $4.78
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Part Details

  • Low Operating IQ: 170μA (One Channel On)
  • Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 24V
  • Wide VIN Range: 4V to 38V
  • RSENSE or DCR Current Sensing
  • Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
  • OPTI-LOOP® Compensation Minimizes COUT
  • Phase-Lockable Frequency (75kHz-850kHz)
  • Programmable Fixed Frequency (50kHz-900kHz)
  • Selectable Continuous, Pulse-Skipping or Burst Mode® Operation at Light Loads
  • Very Low Dropout Operation: 99% Duty Cycle
  • Adjustable Output Voltage Soft-Start or Tracking
  • Power Good Output Voltage Monitor
  • Low Shutdown IQ: 8μA
  • Internal LDO Powers Gate Drive from VIN or EXTVCC
  • No Current Foldback During Start-Up
  • 5mm × 5mm QFN Package
LTC3858-2
Low IQ, Dual 2-Phase Synchronous Step-Down Controller
High Efficiency Dual 8.5V/3.3V Step-Down Converter Efficiency and Power Loss vs Load Current Product Package 1
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Documentation

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Dual-Supply Monitors 1
LTC2960 RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
Multiple Output Buck Regulators 1
LTC3880 RECOMMENDED FOR NEW DESIGNS Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
Pushbutton Controllers 1
LTC2955 RECOMMENDED FOR NEW DESIGNS Pushbutton On/Off Controller with Automatic Turn-On
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363 RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 1


Models for the following parts are available in LTspice:

  • LTC3858
  • LTC3858-1
  • LTC3858-2

LTpowerCAD 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

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