Texas Instruments TPS7A89 LDO Voltage Regulator

Texas Instruments TPS7A89 LDO Voltage Regulator is a dual, low-noise, low-dropout (LDO) voltage regulator capable of sourcing 2A per channel with only 400mV of maximum dropout. The TPS7A89 provides the flexibility of two independent LDOs and an approximately 60% smaller solution size than two single-channel LDOs. Each output is adjustable with external resistors from 0.8V to 5.2V. The wide input-voltage range of the TPS7A89 supports operation as low as 1.4V and up to 6.5V. With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A89 is ideal for powering sensitive analog low-voltage devices. The Texas Instruments TPS7A89 is designed to power noise-sensitive components such as those found in high-speed communication, video, medical, or test and measurement applications.

Features

  • Two independent LDO channels
  • 4mm×4mm, 20-pin WQFN package
  • 3.8µVRMS (10Hz to 100kHz) low output noise 
  • 180mV (typ) at 2A low dropout 
  • 1.4V to 6.5V wide input voltage range 
  • 0.8V to 5.2V wide output voltage range 
  • High Power-Supply Rejection Ratio (PSRR)
    • 75dB at DC
    • 40dB at 100kHz
    • 40dB at 1MHz
  • 1.0% accuracy over line, load, and temperature
  • Excellent load transient response
  • Adjustable start-up in-rush control
  • Selectable soft-start charging current
  • Independent open-drain Power-Good (PGx) outputs
  • Stable with a 10µF or larger ceramic output capacitor

Applications

  • High-speed analog circuits
    • VCOs, ADCs, DACs, LVDSs
  • Imaging (CMOS sensors, video ASICs)
  • Test and measurement
  • Instrumentation, medical, and audio
  • Digital loads auxiliary rails
    • SerDes, FPGAs, DSPs

Functional Block Diagram

Block Diagram - Texas Instruments TPS7A89 LDO Voltage Regulator
Publié le: 2017-01-24 | Mis à jour le: 2022-03-21