The TPS7A85 is a low-noise (4.4 µVRMS), low-dropout linear
regulator (LDO) capable of sourcing 4 A with only 240 mV of maximum dropout. The device output
voltage is pin-programmable from 0.8 V to 3.95 V and adjustable from 0.8 V to 5.0 V using an
external resistor divider.
The combination of low-noise (4.4 µVRMS), high-PSRR, and high
output current capability makes the TPS7A85 ideal to power noise-sensitive components such as those
found in high-speed communications, video, medical, or test and measurement applications. The high
performance of the TPS7A85 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), digital-to-analog converters (DACs), and RF components. Specifically, RF
amplifiers benefit from the high-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-input
voltage, low-output (LILO) voltage operation, the exceptional accuracy (0.75% over load and
temperature), remote sensing, excellent transient performance, and soft-start capabilities of the
TPS7A85 ensure optimal system performance.
The versatility of the TPS7A85 makes the device a component of choice for many demanding