TPS7A53

• 0.5% (max) accuracy over line, load, and temperature with BIAS
• Output voltage noise: 4.4 µV_RMS
• Low dropout: 110 mV (max) at 3 A with BIAS
• Power-supply rejection ratio:
  • 40 dB at 500 kHz
• 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 5.2 V
• 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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The TPS7A53 is a low-noise (4.4 µV_RMS), ultra-low dropout linear-regulator (LDO) capable of sourcing 3 A with only 110 mV of maximum dropout. The device output voltage is adjustable from 0.8 V to 5.2 V using an external resistor divider.

The combination of low noise (4.4 µV_RMS), high PSRR, and high output current capability makes the TPS7A53 an excellent choice to power noise-sensitive components such as those found in high-speed communications, video, medical, or test-and-measurement applications. The high performance of this device limits power-supply-generated phase noise and clock jitter, making this device ideal for powering high-performance serializer and deserializer (SerDes), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs). Specifically, RF amplifiers benefit from the high performance and
5.2-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-input voltage, low-output (LILO) voltage operation, the exceptional accuracy (0.5% over load and temperature), remote sensing, excellent transient performance, and soft-start capabilities of the TPS7A53 provides optimal system performance.

As an adjustable voltage regulator, there is versatility in the design of the TPS7A53 that makes the device a component of choice for analog loads such as VCO, ADC, DAC, and imaging sensors and for digital loads such as SerDes, FPGAs, and DSPs.