TPS63710 Synchronous Inverting Buck Converter

By Texas Instruments 67

TPS63710 Synchronous Inverting Buck Converter

Texas Instruments' TPS63710 is an inverting step-down DC-DC converter generating a negative output voltage down to -5.5 V. It provides an output current up to 1 A, depending on the input-voltage to output-voltage ratio. Its filtered reference system gives low 1/f noise which is required in high-performance telecommunication systems.

The TPS63710 operates with a fixed-frequency PWM control topology. It has an internal current limit and a thermal shutdown. The input voltage range of 3.1 V to 14 V allows the TPS63710 to be used in a variety of applications where a negative output voltage is generated from a, in absolute value, higher positive input voltage.

Synchronous rectification provides high efficiency, especially for small output voltages like -1.8 V, which are typically used as a negative supply voltage for high-performance DACs and ADCs. A fixed switching frequency of 1.5 MHz allows the use of small external components and enables a small total solution size.

The TPS63710 comes in a 3 mm x 3 mm WSON package that provides good thermal performance in applications running at high ambient temperature.

Features
  • 3.1 V to 14 V input voltage range
  • 1 A output current
  • ±1.5% output voltage accuracy
  • Synchronous rectification
  • Low 1/f-noise reference system
  • Output voltage: -1 V to -5.5 V
  • |VOUT| < 0.7 x VIN
  • Up to 91% efficiency
  • 1.5 MHz fixed frequency PWM mode
  • Thermal shutdown
  • 5 µA shutdown current
  • 3 mm x 3 mm WSON package
Applications
  • Generic negative voltage supply
  • ADC and DAC supply in telecom systems
  • Bias for GaN transistors
  • Optical module laser diode bias
  • Noise sensitive and space limited applications requiring a negative supply voltage

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