LT8612
Info: : PRODUCTION
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LT8612

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

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $5.90
Features
  • 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
  • Safely Tolerates Inductor Saturation in Overload Conditions
  • 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
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LT8612 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. 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 LT8612 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 LT8612 is available in a small 3mm × 6mm 28-lead QFN package with exposed pad for low thermal resistance.

APPLICATIONS

  • Automotive and Industrial Supplies
  • General Purpose Step-Down
  • GSM Power Supplies
Part Models 8
1ku List Price Starting From $5.90

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT8612EUDE#PBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC2010A

LT8612 Demo Circuit | 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 6A

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DC2010A

LT8612 Demo Circuit | 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 6A

LT8612 Demo Circuit | 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 6A

Product Detail

Demonstration circuit 2010A is a 42V, 6A micropower synchronous step-down regulator featuring the LT8612. 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 LT8612 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.


 


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DC2132A

24V 3A Constant Voltage, Constant Current Bench Supply Featuring LT3081, LT8612, LT3092

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DC2132A

24V 3A Constant Voltage, Constant Current Bench Supply Featuring LT3081, LT8612, LT3092

24V 3A Constant Voltage, Constant Current Bench Supply Featuring LT3081, LT8612, LT3092

Product Detail

DC2132A is a 24V 3A constant voltage, constant current bench supply. It regulates any output voltage from 0V to 24V and any output current from 0A to 3A. It runs from 10V to 40V input although the output voltage should remain 5V or more below the input voltage.

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.

Reference Designs

Reference Designs 3

CN0508 Block Diagram

75 Watt, Single-Output Benchtop Power Supply

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cn0508

75 Watt, Single-Output Benchtop Power Supply

cn0508

Circuits from the lab

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75 Watt, Single-Output Benchtop Power Supply

Features and Benefits

  • 75 Watt Power Supply
  • Constant Current (>3A) and Constant Voltage (>25V) Modes
  • True 0V and 0A operation
  • Manual or Software Controlled
View Detailed Reference Design external link

Design & Integration Tools

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ZIP

4.72 M

T1023RDB Dev Kit

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nxp-freescale-qoriq-t1023rd

nxp-freescale-qoriq-t1023rd

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link
QorIQ LS1088A-RDB Dev Kit

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nxp-freescale-qoriq-ls1088a-rdb

nxp-freescale-qoriq-ls1088a-rdb

Circuits from the lab

tooltip Info:Circuits from the lab

Features and Benefits

  • Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
  • Our reference designs are supported by an intuitive design tool set and IP
  • Our team can provide designs for quick prototypes that can speed time to market in the most complex applications
View Detailed Reference Design external link

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