TPS54120 1 A Power Supply

By Texas Instruments 135

TPS54120 1 A Power Supply

Texas Instruments' TPS54120 combines the high-efficiency of a step-down switching (DC-DC) converter with a high power-supply rejection (PSR), low-noise, low-dropout regulator (LDO) to provide an ultra low-noise power supply that delivers quiet power rails to noise-sensitive applications.

With a wide input range of 4.5 V to 17 V, the TPS54120 is ideally suited for systems with 12 V power busses, and supports a 1 A continuous output current. The output voltage can be set from 0.8 V to 6.0 V using external resistors. The dc-dc converter and LDO are completely configurable, allowing the TPS54120 to be used in a wide range of low-noise applications.

  • Low-noise output: 17 µVRMS at 100 Hz to 1 MHz
  • Wide input voltage range: 4.5 V to 17 V
  • High efficiency: 72% at 1 A, 12 V input
  • Excellent load/line transient response
  • Synchronizable to external clock: 200 kHz to 1.2 MHz
  • Small package: 3.5 mm × 5.5 mm QFN-24
  • Telecom infrastructure
  • Pico and Femto base stations
  • Powering sensitive clocking distribution circuits
  • Test and measurement
  • Powering RF components: VCOs, receivers, ADCs
  • Professional audio