LT8631

RECOMMENDED FOR NEW DESIGNS

100V, 1A Synchronous Micropower Step-Down Regulator

Data Sheet (Rev. D) Product Selection Table
Part Models
6
1ku List Price
Starting From $4.31
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Part Details

  • Ultrawide Input Voltage Range: 3V to 100V
  • Output Voltage Range: 0.8V to 60V
  • Internal Synchronous Switches
  • Low Ripple Burst Mode® Operation:
    • 16μA IQ at 12VIN to 5VOUT Output Ripple <10mVP-P
    • 7μA IQ at 48VIN to 5VOUT Output Ripple <10mVP-P
  • Low Dropout: 99% Maximum Duty Cycle
  • Peak Current Mode Control
  • Fixed Frequency Operation: 100kHz to 1MHz
  • Synchronization Input
  • Programmable Undervoltage Lockout
  • Power Good Flag
  • Flexible Output Voltage Tracking
  • Short-Circuit Protection
  • Low Shutdown Current: 5μA
  • Tolerates Pin Open/Short Faults
  • Thermally Enhanced 20-Lead TSSOP with High Voltage Lead Spacing
LT8631
100V, 1A Synchronous Micropower Step-Down Regulator
LT8631 Application Circuit LT8631 Performance Graph LT8631 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 2

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LTC4366
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT8631

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.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC2110A

LT8631EFE Demo Board | Synchronous Buck, 6.5V ≤ VIN ≤ 100V; VOUT = 5V @ 1A

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Product Details

Demonstration circuit 2110A is a monolithic step-down converter featuring LT8631. The demo board is designed for 5V output from a 6.5V to 100V input at 400kHz switching frequency. The wide input range makes it suitable for regulating power from a wide variety of sources, including automotive, industrial systems and telecom supplies. The LT8631 is a compact, high efficiency synchronous monolithic step-down switching regulator. The power switch, compensation and other necessary circuits are inside of the LT8631 to minimize external components and simplify design.
DC2110A
LT8631EFE Demo Board | Synchronous Buck, 6.5V ≤ VIN ≤ 100V; VOUT = 5V @ 1A
DC2110A Demo Board DC2110A Demo Board DC2110A Demo Board DC2110A Demo Board DC2110A - Schematic

Latest Discussions

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LT8631 -EN/UV Input Current at 105C
1 Years Ago
thermal shutdown threshold for LT8631
2 Years Ago
LT8631 has high output voltage ripple
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