LTC3856

RECOMMENDED FOR NEW DESIGNS

2-Phase Synchronous Step-Down DC/DC Controller with Diffamp

Part Models
8
1ku List Price
Starting From $3.81
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Part Details

  • PolyPhase® Controller Reduces Input and Output Capacitance and Power Supply Induced Noise
  • Wide VIN Range: 4.5V to 38V Operation
  • ±0.75%, 0.6V Reference Voltage Accuracy
  • High Efficiency: Up to 95%
  • Programmable Burst Mode® Operation or Stage Shedding for Highest Light Load Efficiency
  • Active Voltage Positioning (AVP)
  • RSENSE or DCR Current Sensing
  • Programmable DCR Temperature Compensation
  • Phase-Lockable Fixed Frequency: 250kHz to 770kHz
  • True Remote Sense Differential Amplifier
  • Dual N-Channel MOSFET Synchronous Drive
  • VOUT Range: 0.6V to 5V without Differential Amplifier
  • VOUT Range: 0.6V to 3.3V with Differential Amplifier
  • Adjustable Soft-Start or VOUT Tracking
  • Stackable for Up to 12-Phase Operation
  • 32-Pin (5mm × 5mm) QFN and 38-Pin TSSOP Packages
LTC3856
2-Phase Synchronous Step-Down DC/DC Controller with Diffamp
High Efficiency 1.5V/50A Step-Down Converter Efficiency and Power Loss vs Output Current Product Package 1 Product Package 2
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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
Digital Power System Managers 1
LTC2974 RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
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
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

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.


Evaluation Kits

eval board
DC1580A

LTC3856EUH Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 50A

Product Details

Demonstration circuit 1580A is a high efficiency, polyphase, synchronous buck converter with a 4.5V to 14V input range. It can supply 50A maximum load current at 1.5V output. The demo board uses the LTC3856EUH controller. The LTC3856 is a feature-rich single-output dual-phase synchronous buck controller with on-chip drivers and remote differential output voltage sensing. This board is setup with sense resistor configuration with optional inductor DCR sensing circuit.

DC1580A
LTC3856EUH Demo Board | 4.5V ≤ VIN ≤ 14V, VOUT = 1.5V @ 50A
DC1580A - Schematic

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