1 Features
• Low dropout: 180 mV (maximum) at 3 A with BIAS
• 0.75% (maximum) accuracy over line, load, and
temperature with BIAS
• Output voltage noise: 4.4 μVRMS
• Input voltage range:
– Without BIAS: 1.4 V to 6.5 V
– With BIAS: 1.1 V to 6.5 V
• TPS7A8400A output voltage range:
– Adjustable operation: 0.8 V to 5.15 V
– ANY-OUT™ operation: 0.8 V to 3.95 V
• TPS7A8401A output voltage range:
– Adjustable operation: 0.5 V to 5.15 V
– ANY-OUT™ operation: 0.5 V to 2.075 V
• Power-supply ripple rejection:
– 40 dB at 500 kHz
• Excellent load transient response
• Adjustable soft-start in-rush control
• Open-drain power-good (PG) output

2 Applications
• Macro remote radio units (RRU)
• Outdoor backhaul units
• Active antenna system mMIMO (AAS)
• Ultrasound scanners
• Lab and field instrumentation
• Sensor, imaging, and radar

3 Description
The TPS7A84A is a low-noise, low-dropout linear
regulator (LDO) capable of sourcing 3 A with only
180-mV of maximum dropout. The device is offered in
two output voltage ranges. The TPS7A8400A output
voltage is pin-programmable from 0.8 V to 3.95 V, with
a 50-mV resolution, and adjustable from 0.8 V to 5.15
V using an external resistor divider. The TPS7A8401A
output voltage is pin-programmable from 0.5 V to
2.075 V, with a 25-mV resolution, and adjustable from
0.5 V to 5.15 V using an external resistor divider.
The combination of low-noise, high-PSRR, and high
output-current capability makes the TPS7A84A 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 TPS7A84A limits power-supplygenerated
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-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 line,
load, and temperature), remote sensing, excellent
transient performance, and soft-start capabilities of
the TPS7A84A ensure optimal system performance.
The versatility of the TPS7A84A makes the device a
component of choice for many demanding
applications.