LT8337
LT8337-1
Info : RECOMMENDED FOR NEW DESIGNS
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LT8337
LT8337-1

28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 5
1ku List Price Starting From $2.77
Features
  • Silent Switcher® Architecture
  • Ultralow EMI Emissions
  • Optional Spread Spectrum Frequency Modulation
  • Integrated 28V, 5A Power Switches
  • Wide Input Voltage Range: 2.7V to 28V
  • Output Voltage Programmable Up to 26V
  • Low VIN Pin Quiescent Current
  • 0.3μA in Shutdown
  • 4μA in Burst Mode® Operation (LT8337)
  • 15μA in PassThru (LT8337)
  • 100% Duty Cycle Capability for Synchronous MOSFET
  • External Compensation: Fast Transient Response (LT8337-1)
  • Power Good Monitor (LT8337)
  • Adjustable and Synchronizable: 300kHz to 3MHz
  • Pulse-Skipping or Burst Mode Operation at Light Load
  • Small 16-Lead (3mm × 3mm) LQFN Package
Additional Details
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The LT8337/LT8337-1 is a low IQ, synchronous step-up DC/DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation (SSFM) to minimize EMI emissions while delivering high efficiencies at high switching frequencies.

The wide input/output voltage range, low VIN pin quiescent current in Burst Mode operation, and 100% duty-cycle capability for the synchronous MOSFET in PassThru operation (VIN > VOUT) makes the LT8337/LT8337-1 ideally suited for battery-powered systems and general purpose step-up applications.

The LT8337/LT8337-1 integrates 28V, 5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8337/LT8337-1 features output soft-start and output overvoltage lockout.

The LT8337-1 allows external compensation via the VC pin for fast transient response. The LT8337 offers an output power good flag via the PG pin.

Applications

  • Battery-Powered Systems
  • General Purpose Step-Up
Part Models 5
1ku List Price Starting From $2.77

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT8337EV#PBF
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LT8337EV#TRPBF
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LT8337EV-1#PBF
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LT8337JV#PBF
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LT8337JV-1#PBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

EVAL-LT8337-AZ

LT8337 |  28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru

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EVAL-LT8337-AZ

LT8337 |  28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru

LT8337 |  28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru

Product Detail

Evaluation circuit EVAL-LT8337-AZ features the LT8337 as a 2MHz low IQ, synchronous boost converter with a 12V output from 4.5V to 12V input. When VIN goes above the 12V output regulation setpoint, the LT8337 smoothly transitions between regulation and PassThru™ mode. This evaluation circuit features Spread Spectrum Frequency Modulation (SSFM), Silent Switcher® technology, and EMI filters to provide optimum EMI performance. The converter can output 1.2A or more depending on input voltage (see Figure 3 for the Maximum Output Current vs VIN curve). When placed in shutdown, the converter has very low quiescent current, ideal in automotive and other battery-powered applications. PULSE SKIP and BURST modes are selectable with jumper JP1. Each user-selectable option enables low quiescent current at light load and can also be combined with SSFM operation using JP1.

The LT8337 boost converter IC operates over an input range of 2.7V to 28V, suitable for automotive, telecom and industrial applications. It exhibits a low quiescent current of 4μA, making it ideal for battery-operated systems. The converter provides adjustable and synchronizable operation from 300kHz to 3MHz with SSFM option. At light load, either PULSE SKIP or low-ripple BURST mode can be selected to improve the efficiency. The LT8337 packs popular features such as soft-start, input undervoltage lockout, adjustable switching frequency and clock synchronization. The Power Good (PG) flag indicates when the output voltage is in regulation.

The LT8337 comes in a small 16-lead plastic LQFN package for optimal size and emissions. The LT8337 data sheet gives a complete description of the part, pins, features, operation, and application information. The data sheet must be read in conjunction with the demo manual for EVAL-LT8337-AZ.

reference details image

EVAL-LT8337-1-AZ

LT8337-1 | 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru and VC Pin

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EVAL-LT8337-1-AZ

LT8337-1 | 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru and VC Pin

LT8337-1 | 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru and VC Pin

Product Detail

Evaluation circuit EVAL-LT8337-1-AZ features the LT8337-1 as a 2MHz low IQ, synchronous boost converter with a 12V output from 4.5V to 12V input. When VIN goes above the 12V output regulation setpoint, the LT8337-1 smoothly transitions between regulation and PassThru mode. This evaluation circuit features Spread Spectrum Frequency Modulation (SSFM), Silent Switcher® technology, and EMI filters to provide optimum EMI performance. The converter can output 1.2A or more depending on input voltage (see Figure 3 in the user guide for the Maximum Output Current vs VIN curve). When placed in shutdown, the converter has very low quiescent current, ideal in automotive and other battery-powered applications. PULSE SKIP and BURST modes are selectable with jumper JP1. Each user-selectable option enables low quiescent current at light load and can also be combined with SSFM operation using JP1.

The LT8337-1 boost converter IC operates over an input range of 2.7V to 28V, suitable for automotive, telecom and industrial applications. It exhibits a low quiescent current of 23μA, making it ideal for battery-operated systems. The converter provides adjustable and synchronizable operation from 300kHz to 3MHz with SSFM option. At light load, either PULSE SKIP or low-ripple BURST mode can be selected to improve the efficiency. The LT8337-1 packs popular features such as soft-start, input undervoltage lockout, adjustable switching frequency and clock synchronization. The VC pin grants easy accessibility to change loop compensation to complement most applications.

The LT8337-1 comes in a small 16-lead plastic LQFN package for optimal size and emissions. The LT8337-1 data sheet gives a complete description of the part, pins, features, operation, and application information. The data sheet must be read in conjunction with this demo manual for EVAL-LT8337-1-AZ.

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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