LTC3721-1

PRODUCTION

Push-Pull PWM Controller

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Overview

  • High Efficiency Push-Pull PWM
  • 1.5A Sink, 1A Source Output Drivers
  • Adjustable Push-Pull Dead-Time
  • Adjustable System Undervoltage Lockout and Hysteresis
  • Adjustable Leading Edge Blanking
  • Low Start-Up and Quiescent Currents
  • Current Mode Operation
  • Single Resistor Slope Compensation
  • VCC UVLO and 25mA Shunt Regulator
  • Programmable Fixed Frequency Operation to 1MHz
  • Soft-Start, Cycle-by-Cycle Current Limiting and Hiccup Mode Short-Circuit Protection
  • 5V, 15mA Low Dropout Regulator
  • 16-Pin SSOP and (4mm x 4mm) QFN Packages

The LTC3721-1 push-pull PWM controller provides all of the control and protection functions necessary for compact and highly efficient, isolated power converters. High integration minimizes external component count, while preserving design flexibility.

The robust push-pull output stages switch at half the oscillator frequency. Dead-time is independently programmed with an external resistor. A UVLO program input provides precise system turn-on and turn off voltages. The LTC3721-1 features peak current mode control with programmable slope compensation and leading edge blanking.

The LTC3721-1 features extremely low operating and start-up currents and reliable short-circuit and overtemperature protection. The LTC3721-1 is offered in 16-pin SSOP and (4mm × 4mm) QFN packages.

Applications

  • Telecommunications, Infrastructure Power Systems
  • Distributed Power Architectures
  • Server Power Supplies
  • High Density Power Modules
LTC3721-1
Push-Pull PWM Controller
Isolated Push-Pull Converter Product Package 1 Product Package 2
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Switching Regulators & Controllers 2
LTM8047
RECOMMENDED FOR NEW DESIGNS 3.1VIN to 32VIN Isolated μModule (Power Module) DC/DC Converter
LTM8048
RECOMMENDED FOR NEW DESIGNS 3.1VIN to 32VIN Isolated μModule (Power Module) DC/DC Converter with LDO Post Regulator
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3721-1
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