LT8610A
LT8610AB

PRODUCTION

42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Data Sheet (Rev. C)
Part Models
48
1ku List Price
Starting From $4.48
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Part Details

  • LT8610 Feature Set, Plus:
    • 3.5A Maximum Output Current Fast
    • 30ns Minimum Switch-On Time
    • Improved Burst Mode Efficiency (LT8610AB Only)
    • Improved EMI
  • Wide Input Voltage Range: 3.4V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 2.5μA IQ Regulating 12VIN to 3.3VOUT
  • Fixed Output Voltages: 3.3V, 5V
  • Output Ripple < 10mVP-P (LT8610A Only)
  • High Efficiency Synchronous Operation:
    • 95% Efficiency at 1A, 5VOUT from 12VIN
    • 93% Efficiency at 1A, 3.3VOUT from 12VIN
  • Low Dropout Under All Conditions: 200mV at 1A
  • Safely Tolerates Inductor Saturation in Overload
  • Adjustable and Synchronizable Frequency:
    • 200kHz to 2.2MHz
  • Accurate 1V Enable Pin Threshold
  • Output Soft-Start and Tracking
  • Small Thermally Enhanced 16-Lead MSOP Package
  • AEC-Q100 Qualified for Automotive Applications
LT8610A
LT8610AB
42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current
LT8610A/LT8610AB LT8610A/LT8610AB Pin Configuration LT8610A/LT8610AB Pin Configuration LT8610A/LT8610AB Performance Graph
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Technical Articles 1

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Hardware Ecosystem

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Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

  • LT8610
  • LT8610A
  • LT8610AB
  • LT8610AC

LTpowerCAD 2

Design tools for the following parts are available in LTpowerCAD:

  • LT8610
  • LT8610A
  • LT8610AB
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
DC2012A

LT8610AB Demo Board | Micropower Synchronous Buck, High Efficiency Burst Mode, 5.5V ≤ VIN ≤ 42V, VOUT = 5V @ 3.5A

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Product Details

Demonstration circuit 2012A is a 42V, 3.5A micropower synchronous step-down regulator featuring the LT8610AB. The LT8610AB is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current when output is regulated at 5V. The efficiency of the circuit is greater than 90% at light load up to 1.5A. This is a 10% improvement over competing parts. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8610AB to minimize external components and simplify design.

eval board
schematic 6
DC2139A

LT8610A Demo Board | Micropower Sync Buck, 5.5V ≤ VIN ≤ 42V Input, VOUT = 5V @ 3.5A

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Product Details

Demonstration circuit 2139A is a 42V, 3.5A micropower synchronous step-down regulator featuring the LT8610A. The LT8610A is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current when output is regulated at 5V and is unloaded. The 2139A uses two input ceramic capacitors in series to improve reliability in case of an input capacitor short failure. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8610A to minimize external components and simplify design.
DC2012A
LT8610AB Demo Board | Micropower Synchronous Buck, High Efficiency Burst Mode, 5.5V ≤ VIN ≤ 42V, VOUT = 5V @ 3.5A
DC2012A Demo Board DC2012A Demo Board DC2012A Demo Board DC2012A Demo Board DC2012A - Schematic
DC2139A
LT8610A Demo Board | Micropower Sync Buck, 5.5V ≤ VIN ≤ 42V Input, VOUT = 5V @ 3.5A
DC2139A - Schematic

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