LTC1702

PRODUCTION

Dual 550kHz Synchronous 2-Phase Switching Regulator Controller

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Overview

  • Two Independent Controllers in One Package
  • Two Sides Run Out-of-Phase to Minimize CIN
  • All N-Channel External MOSFET Architecture
  • No External Current Sense Resistors
  • Excellent Output Regulation: 1% Total Output Accuracy
  • 550kHz Switching Frequency Minimizes External Component Size
  • 1A to 25A Output Current per Channel
  • High Efficiency over Wide Load Current Range
  • Quiescent Current Drops Below 100µA in Shutdown
  • Small 24-Pin Narrow SSOP Package

The LTC1702 is a dual switching regulator controller optimized for high efficiency with low input voltages. It includes two complete, on-chip, independent switching regulator controllers each designed to drive a pair of external N-channel MOSFET devices in a voltage mode feedback, synchronous buck configuration. The LTC1702 uses a constant-frequency, true PWM design switching at 550kHz, minimizing external component size and cost and maximizing load transient performance. The synchronous buck architecture automatically shifts to discontinuous and then to Burst Mode™ operation as the output load decreases, ensuring maximum efficiency over a wide range of load currents.

The LTC1702 features an onboard reference trimmed to 0.5% and can provide better than 1% regulation at the converter outputs. Open-drain logic outputs indicate whether either output has risen to within 5% of the final output voltage and an optional latching FAULT mode protects the load if the output rises 15% above the intended voltage. Each channel can be enabled independently; with both channels disabled, the LTC1702 shuts down and supply current drops below 100µA.

Applications

  • Microprocessor Core and I/O Supplies
  • Multiple Logic Supply Generator
  • Distributed Power Applications
  • High Efficiency Power Conversion
LTC1702
Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
Dual Output High Power 3.3V/2.5V Logic Supply Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 5

Technical Articles 4

Data Sheet

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC1702A
PRODUCTION Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC1702
  • LTC1702A
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.

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