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Texas Instruments TPS53317A SWIFT™ Synchronous Step-Down Converter

Texas Instruments TPS53317A SWIFT™ Synchronous Step-Down Converter is a FET-integrated synchronous buck regulator designed mainly for DDR termination. It can provide a regulated output at ½VDDQ with sink and source capability. The device employs D-CAP+ mode operation that provides ease of use, low external component count, and fast transient response. The device can also be used for other point-of-load (POL) regulation applications requiring up to 6A. In addition, the device supports full (6A) output sinking current capability with tight voltage regulation. The Texas Instruments TPS53317A SWIFT™ Synchronous Step-Down Converter supports input voltages up to 6.0V with adjustable output voltages from 0.45V to 2.0V.

Features

  • TI-proprietary integrated MOSFET and packaging technology
  • Supports DDR memory termination with up to 6A continuous output source or sink current
  • External tracking
  • Minimum external component count
  • 0.9V to 6V conversion voltage range
  • D-CAP+ mode architecture
  • Supports all MLCC output capacitors and SP/POSCAP
  • Selectable SKIP mode or forced CCM
  • Optimized efficiency at light and heavy loads
  • Selectable 600kHz or 1MHz switching frequency
  • Selectable overcurrent limit (OCL)
  • Overvoltage, over-Temperature, and hiccup undervoltage protection
  • Adjustable output voltage from 0.45V to 2V
  • 3.5mm × 4mm, 20-pin, VQFN package

Applications

  • Memory termination regulator for DDR, DDR2, DDR3, DDR3L, and DDR4
  • VTT terminations
  • Low-voltage applications for 0.9V to 6V input rails

Simplified Application Circuit

Application Circuit Diagram - Texas Instruments TPS53317A SWIFT™ Synchronous Step-Down Converter

Functional Block Diagram

Block Diagram - Texas Instruments TPS53317A SWIFT™ Synchronous Step-Down Converter
Published: 2016-01-15 | Updated: 2022-03-11