LT8601
Info : RECOMMENDED FOR NEW DESIGNS
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LT8601

42V Triple Monolithic Synchronous Step-Down Regulator

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $6.13
Features
  • Flexible Power Supply System Providing Three Outputs Over a Wide Input Voltage Range
  • Two High Voltage Synchronous Buck Regulators
    • 3V to 42V Input Voltage Range
    • Output Currents Up to 2.5A and 1.5A
    • High Efficiency Up to 93%
  • One Low Voltage Synchronous Buck Regulator
    • 2.6V to 5.5V Input Voltage Range
    • Output Current Up to 1.8A and 95% Efficiency
  • Programmable Power-On Reset
  • Resistor Programmable and Synchronizable from 250kHz to 2.2MHz Switching Frequency
  • Low Ripple Burst Mode® Operation
    • 30μA IQ at 12VIN to 3.3VOUT2
    • Output Ripple <15mV
  • Power Good Indicators
  • 2-Phase Clock Reduces Input Current Ripple
  • Available in Thermally Enhanced 40-Lead QFN (6mm × 6mm) Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT8601 is a triple channel, current mode, monolithic buck switching regulator with a programmable power-on reset. All regulators are synchronized to a single oscillator with an adjustable frequency from 250kHz to 2.2MHz. The LT8601 can be configured for micropower Burst Mode or Pulse-Skipping operation at light load. Micropower operation results in quiescent current of 30μA with all three regulators operating as shown in the application below with no load applied.

The high voltage channels are synchronous buck regulators that operate from an input of 3.0V to 42V. The output currents are up to 1.5A (OUT1) and 2.5A (OUT2). The low voltage channel operates from an input of 2.6V to 5.5V. Internal synchronous power switches provide high efficiency with output currents up to 1.8A. The LT8601 uses a 2-phase clock with channel 1 operating 180° from channels 2 and 3 to reduce input ripple current on both HV and LV inputs. All channels have cycle-by-cycle current limit, providing protection against shorted outputs. Thermal shutdown provides additional protection.

The LT8601 is available in a 40-lead 6mm × 6mm QFN package.

APPLICATIONS

  • Automotive Systems
  • Distributed Supply Regulation
  • Industrial Controls and Power Supplies
Part Models 12
1ku List Price Starting From $6.13

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8601EUJ#PBF

PRODUCTION

LT8601EUJ#TRPBF

PRODUCTION

LT8601IUJ#PBF

PRODUCTION

LT8601IUJ#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Apr 11, 2019

- 19_0067

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Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8601EUJ#PBF

PRODUCTION

LT8601EUJ#TRPBF

PRODUCTION

LT8601IUJ#PBF

PRODUCTION

LT8601IUJ#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2346A

LT8601EUJ Demo Board | Triple Sync Buck, 6V ≤ VIN ≤ 24V, 5VOUT1 @ 1.5A, 3.3VOUT2 @ 2.5A and 1.8VOUT3 @ 1.8A, 2MHz FSW

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DC2346A

LT8601EUJ Demo Board | Triple Sync Buck, 6V ≤ VIN ≤ 24V, 5VOUT1 @ 1.5A, 3.3VOUT2 @ 2.5A and 1.8VOUT3 @ 1.8A, 2MHz FSW

LT8601EUJ Demo Board | Triple Sync Buck, 6V ≤ VIN ≤ 24V, 5VOUT1 @ 1.5A, 3.3VOUT2 @ 2.5A and 1.8VOUT3 @ 1.8A, 2MHz FSW

Product Detail

Demonstration circuit 2346A is a triple power supply featuring the LT8601. LT8601 is a 42V triple monolithic synchronous step-down regulator. The demo circuit is designed for 5V, 3.3V, and 1.8V outputs from a nominal 12V input, with switching frequency set at 2MHz to avoid audio band. The 1.8V converter is powered from the 3.3V output, and the 5V, 3.3V are powered from a wide range of 6V to 24V, transient to 42V. The current capability is 2.5A for the 3.3V output, 1.5A for the 5V output, and 1.8A for the 1.8V output when running individually. Up to 1A load current can be applied to all the channels simultaneously without special cooling.

Tools & Simulations

Tools & Simulations 2

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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