LT8697

RECOMMENDED FOR NEW DESIGNS

USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation

Data Sheet Product Selection Table
Part Models
6
1ku List Price
Starting From $4.25
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Part Details

  • Wide Input Range: 5V to 42V
  • Low Dropout Under All Conditions: 450mV at 2.1A
  • Accurate 5V Output: ±1.3% Over Full Temperature Range
  • Programmable Cable Drop Compensation
  • Programmable Output Current Limit
  • Output Current Monitor
  • Dual Input Feedback Permits Regulation on Output of USB Switch
  • Forced Continuous Mode for Fast Load Step Response
  • High Efficiency Synchronous Operation at 2MHz:
    • 93% Efficiency at 2.1A, 5VOUT from 12VIN
    • 95% Efficiency at 0.9A, 5VOUT from 12VIN
  • Fast Minimum Switch-On Time: 45ns
  • Adjustable Output from 5.0V to 5.25V
  • Adjustable and Synchronizable: 300kHz to 2.2MHz
  • Small Thermally Enhanced 3mm × 5mm 24-Lead QFN Package
LT8697
USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation
2MHz 5V Step-Down Converter with Cable Drop Compensation Transient Response Through 3 Meters AWG 20 Twisted-Pair Cable Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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
Low Voltage Hot Swap Controllers 1
LTC4361-1
LTC4361-2
Overvoltage/Overcurrent Protection Controller
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT8697
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.

Evaluation Kits

eval board
schematic 1
DC1973A

LT8697 Demo Board | 6V ≤ VIN ≤ 42V, 5V @ 2.5A USB Supply Output, Cable Drop Compensation

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Product Details

Demonstration circuit 1973A is a USB 5V 2.5A output, 6V to 42V input synchronous buck with cable drop compensation featuring the LT8697. The LT8697 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator designed to power 5V USB applications. A precise output voltage and programmable cable drop compensation maintain accurate 5V regulation at the USB socket at the end of a long cable. The circuit runs at 2MHz to minimize external components size and to avoid AM band.
DC1973A
LT8697 Demo Board | 6V ≤ VIN ≤ 42V, 5V @ 2.5A USB Supply Output, Cable Drop Compensation
DC1973A - Schematic

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