LT8614
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LT8614

42V, 4A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

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Info: : PRODUCTION tooltip
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Part Details
Part Models 12
1ku List Price Starting From $5.07
Features
  • Silent Switcher® Architecture
    • Ultralow EMI Emissions
  • High Efficiency at High Frequency
    • Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT
    • Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT
  • Wide Input Voltage Range: 3.4V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 2.5μA IQ Regulating 12VIN to 3.3VOUT
    • Output Ripple < 10mVP-P
  • Fast Minimum Switch On-Time: 30ns
  • Low Dropout Under All Conditions: 125mV at 1A
  • Safely Tolerates Inductor Saturation in Overload
  • Adjustable and Synchronizable: 200kHz to 3MHz
  • Peak Current Mode Operation
  • Accurate 1V Enable Pin Threshold
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Small 18-Lead 3mm × 4mm QFN
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT8614 step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at frequencies up to 3MHz. Assembled in a 3mm × 4mm QFN, the monolithic construction with integrated power switches and inclusion of all necessary circuitry yields a solution with a minimal PCB footprint. An ultralow 2.5μA quiescent current—with the output in full regulation— enables applications requiring highest efficiency at very small load currents. Transient response remains excellent and output voltage ripple is below 10mVP-P at any load, from zero to full current.

The LT8614 allows high VIN to low VOUT conversion at high frequency with a fast minimum top switch on-time of 30ns. Operation is safe in overload even with a saturated inductor.

Essential features are included and easy to use: An open-drain PG pin signals when the output is in regulation. The SYNC pin allows clock synchronization and choice of Burst Mode operation or pulse-skipping mode. Soft-start and tracking functionality is accessed via the TR/SS pin. An accurate enable threshold can be set using the EN/UV pin and a resistor at the RT pin programs switch frequency.

Applications

  • Automotive and Industrial Supplies
  • General Purpose Step-Down
  • GSM Power Supplies
Part Models 12
1ku List Price Starting From $5.07

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Documentation

Documentation

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

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Sep 30, 2020

- 20_0293

Test Site Transfer from Analog Devices Singapore to UTAC Thailand

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Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

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Filter by Model

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Part Models

Product Lifecycle

PCN

Sep 30, 2020

- 20_0293

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Test Site Transfer from Analog Devices Singapore to UTAC Thailand

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PRODUCTION

LT8614EUDC#TRPBF

PRODUCTION

LT8614HUDC#PBF

PRODUCTION

LT8614HUDC#TRPBF

PRODUCTION

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PRODUCTION

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PRODUCTION

Apr 11, 2019

- 19_0067

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Notification of Wafer Fab Location Change for 0.35 BCD Process

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PRODUCTION

LT8614EUDC#TRPBF

PRODUCTION

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2019B

LT8614 Demo Board | 2MHz Buck Silent Switcher, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 4A

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DC2019B

LT8614 Demo Board | 2MHz Buck Silent Switcher, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 4A

LT8614 Demo Board | 2MHz Buck Silent Switcher, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 4A

Product Detail

Demonstration circuit 2019B is a 42V, 4A micropower synchronous step-down Silent Switcher featuring the LT8614. The demo board is designed for 5V output from a 5.8V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8614 is a compact, ultralow emission, high efficiency and high speed synchronous monolithic step-down switching regulator. The integrated power switches and inclusion of all necessary circuitry reduce the components count and solution size. Special Silent Switcher architecture minimizes EMI/EMC emissions. Ultralow 2.5μA quiescent current in Burst Mode® operation achieves high efficiency at very light loads. Fast minimum on-time of 30ns enables high VIN to low VOUT conversion at high frequency.

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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