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4-A high-accuracy low-noise low-dropout (LDO) voltage regulator

Availability: 74


Package | PIN: VQFN-HR (RPS) | 12
Temp: Q (-40 to 125)
Package qty | Carrier: 250 | LARGE T&R
Qty Price
1-99 $2.75
100-249 $2.47
250-999 $1.76
1,000+ $1.50


  • Input voltage range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • Adjustable output voltage range: 0.8 V to 5.1 V
  • Low dropout: 200 mV (max) at 4 A with BIAS
  • Output voltage noise: 4.4 µVRMS
  • 1% (max) accuracy over line, load, and temperature with BIAS
  • Power-supply rejection ratio:
    • 40 dB at 500 kHz
  • Adjustable soft-start inrush control
  • Open-drain, power-good (PG) output
  • 2.2-mm × 2.5-mm, 12-pin VQFN package

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Texas Instruments  PTPS7A5401RPSR

The TPS7A54 is a low-noise (4.4 µVRMS), low-dropout linearregulator (LDO) capable of sourcing 4 A with only 200 mV of maximum dropout. Thedevice output voltage is adjustable from 0.8 V to 5.1 V using an external resistor divider.

The combination of low-noise (4.4 µVRMS), high PSRR, and highoutput current capability makes the TPS7A54 an excellent choice to power noise-sensitive componentssuch as those found in radar power and infotainment applications. The high performance of thisdevice limits power-supply-generated phase noise and clock jitter, making this device ideal forpowering RF amplifiers, radar sensors, and chipsets. Specifically, RF amplifiers benefit from thehigh performance and 5.0-V output capability of the device.

For digital loads [such as application-specific integrated circuits (ASICs),field-programmable gate arrays (FPGAs), and digital signal processors (DSPs)] requiring low-inputvoltage, low-output (LILO) voltage operation, the exceptional accuracy (1% over load andtemperature), remote sensing, excellent transient performance, and soft-start capabilities of theTPS7A54 provides optimal system performance.

As an adjustable voltage regulator, there is versatility in design of the TPS7A54 thatmakes the device a component of choice for analog loads such as voltage-controlled oscillator(VCO), analog-to-digital converter (ADC), digital-to-analog converter (DAC), and imaging sensorsand for digital loads such as serializer/deserializer (SerDes), field-programmable gate arrays(FPGAs), and digital signal processors (DSPs).