LT8613
Info : RECOMMENDED FOR NEW DESIGNS
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LT8613

42V, 6A Synchronous Step-Down Regulator with Current Sense and 3μA Quiescent Current

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 4
1ku List Price Starting From $6.20
Features
  • Rail-to-Rail Current Sense Amplifier with Monitor
  • Wide Input Voltage Range: 3.4V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 3μA IQ Regulating 12VIN to 3.3VOUT
    • Output Ripple < 10mVP-P
  • High Efficiency Synchronous Operation:
    • 95% Efficiency at 3A, 5VOUT from 12VIN
    • 94% Efficiency at 3A, 3.3VOUT from 12VIN
  • Fast Minimum Switch-On Time: 40ns
  • Low Dropout Under All Conditions: 250mV at 3A
  • Allows Use of Small Inductors
  • Low EMI
  • Adjustable and Synchronizable: 200kHz to 2.2MHz
  • Current Mode Operation
  • Accurate 1V Enable Pin Threshold
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Small Thermally Enhanced 3mm × 6mm 28-Lead QFN Package
Additional Details
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The LT8613 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 3µA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. The built-in current sense amplifier with monitor and control pins allows accurate input or output current regulation and limiting. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mVP-P. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program VIN undervoltage lockout or to shut down the LT8613 reducing the input supply current to 1µA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8613 is available in a small 28-lead 3mm × 6mm QFN package with exposed pad for low thermal resistance.

Applications

  • Automotive and Industrial Supplies
  • General Purpose Step-Down
  • CCCV Power Supplies
Part Models 4
1ku List Price Starting From $6.20

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT8613EUDE#PBF
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LT8613EUDE#TRPBF
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LT8613IUDE#PBF
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LT8613IUDE#TRPBF
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Product Lifecycle

PCN

Mar 11, 2020

- 20_0013

LT8613 Data Sheet Limit Change

LT8613EUDE#PBF

PRODUCTION

LT8613EUDE#TRPBF

PRODUCTION

LT8613IUDE#PBF

PRODUCTION

LT8613IUDE#TRPBF

PRODUCTION

Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8613EUDE#PBF

PRODUCTION

LT8613EUDE#TRPBF

PRODUCTION

LT8613IUDE#PBF

PRODUCTION

LT8613IUDE#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Mar 11, 2020

- 20_0013

arrow down

LT8613 Data Sheet Limit Change

LT8613EUDE#PBF

PRODUCTION

LT8613EUDE#TRPBF

PRODUCTION

LT8613IUDE#PBF

PRODUCTION

LT8613IUDE#TRPBF

PRODUCTION

Apr 11, 2019

- 19_0067

arrow down

Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8613EUDE#PBF

PRODUCTION

LT8613EUDE#TRPBF

PRODUCTION

LT8613IUDE#PBF

PRODUCTION

LT8613IUDE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2011A

LT8613EUDE Demo Board | Sync Buck, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 6A

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DC2011A

LT8613EUDE Demo Board | Sync Buck, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 6A

LT8613EUDE Demo Board | Sync Buck, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 6A

Product Detail

Demonstration Circuit 2011A is a 42V, 6A micropower synchronous step-down regulator with current sense featuring the LT8613. 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 LT8613 is a compact, 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. Ultralow 3μA quiescent current in Burst Mode® operation achieves high efficiency at very light loads. Fast minimum on-time of 40ns enables high VIN to low VOUT conversion at high frequency.

Tools & Simulations

Tools & Simulations 1

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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