LTC1703
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LTC1703

Dual 550kHz Synchronous 2-Phase Switching Regulator Controller with 5-Bit VID

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Part Details
Part Models 4
1ku List Price Starting From $7.51
Features
  • Side 1 Output Is Compliant with Intel Mobile VID Specifications (Includes 5-Bit DAC)
  • 0.9V to 2.0V Output Voltage with 25mV/50mV Steps
  • Two Sides Run Out-of-Phase to Minimize CIN
  • Precision Internal 0.8V ±1% Reference
  • Two Independent PWM Controllers in One Package
  • All N-Channel External MOSFET Architecture
  • No External Current Sense Resistor
  • 550kHz Switching Frequency Minimizes External Component Size
  • Very Fast Transient Response
  • Up to 25A Output Current per Channel
  • Low Shutdown Current: < 100µA
  • Small 28-Pin SSOP Package
Additional Details
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The LTC1703 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 is designed to drive a pair of external N-channel MOSFET devices in a voltage mode feedback, synchronous buck configuration. The LTC1703 includes digital output voltage adjustment on side 1 that conforms to the Intel Mobile VID specification. It uses a constant-frequency, true PWM design switching at 550kHz, minimizing external component size and cost and optimizing 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 LTC1703 features an onboard reference trimmed to 1% and delivers better than 1.5% regulation at the converter outputs. 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 LTC1703 shuts down and supply current drops below 100µA.

Applications

  • Mobile Pentium® III Processor Systems
  • Microprocessor Core and I/O Supplies
  • Multiple Logic Supply Generator
  • High Efficiency Power Conversion
Part Models 4
1ku List Price Starting From $7.51

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

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Aug 6, 2022

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Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC1703CG#PBF

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LTC1703CG#TRPBF

PRODUCTION

LTC1703IG#PBF

PRODUCTION

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PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Tools & Simulations

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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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