LTC3703

PRODUCTION

100V Synchronous Switching Regulator Controller

Data Sheet Product Selection Table
Part Models
8
1ku List Price
Starting From $4.15
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Part Details

  • High Voltage Operation: Up to 100V
  • Large 1Ω Gate Drivers
  • No Current Sense Resistor Required
  • Step-Up or Step-Down DC/DC Converter
  • Dual N-Channel MOSFET Synchronous Drive
  • Excellent Line and Load Transient Response
  • Programmable Constant Frequency: 100kHz to 600kHz
  • ±1% Reference Accuracy
  • Synchronizable up to 600kHz
  • Selectable Pulse Skip Mode Operation
  • Low Shutdown Current: 50µA Typ
  • Programmable Current Limit
  • Undervoltage Lockout
  • Programmable Soft-Start
  • 16-Pin Narrow SSOP and 28-Pin SSOP Packages
LTC3703
100V Synchronous Switching Regulator Controller
High Efficiency High Voltage Step-Down Converter Efficiency vs Load Current Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LTC3703
  • LTC3703-5
LTspice

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.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
DC501A

LTC3703EGN Demo board | High Input Voltage, Step-Down 6A Power Supply, 20 to 72VIN, 12VOUT @ 6A

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Product Details

Demonstration circuit 501 is high power, high voltage, and high efficiency DC/DC buck converter featuring the LTC3703. This is a general-purpose high voltage DC to DC with an input voltage range of 20V to 72V. The board is optimized for positive 48V input operation with high voltage surges up to 72VDC allowed. The limiting factor is the LTC3703 GN16 package that will not meet UL/CSA/IEC60950 clearance and creepage distance requirements above the SELV 60VDC maximum due to pin spacing. If the user wishes to support higher continuous input voltages or compliance to 60950, the LTC3703 is offered in a G-28 pin package. See Data Sheet. However, for the purposes of evaluation, the board will work reliably up to 72V. The maximum continuous current in free air is 4A. 6A is permissible with some forced air cooling. The output voltage is programmed with a voltage divider and configured for 12V.
DC501A
LTC3703EGN Demo board | High Input Voltage, Step-Down 6A Power Supply, 20 to 72VIN, 12VOUT @ 6A
DC501A Demo Board DC501A Demo Board DC501A Demo Board DC501A Demo Board DC501A - Schematic

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