1 Features
1• 1.0% accuracy over line, load, and temperature
• Low output noise: 4.7 μVRMS (10 Hz–100 kHz)
• Low dropout: 100 mV (max) at 0.5 A
• Wide input voltage range: 1.4 V to 6.5 V
• Wide output voltage range: 0.8 V to 5.7 V
• High power-supply rejection ratio (PSRR):
– 60 dB at DC
– 50 dB at 100 kHz
– 30 dB at 1 MHz
• Fast transient response
• Adjustable start-up in-rush control with selectable
soft-start charging current
• Open-drain power-good (PG) output
• RθJC = 3.2ºC/W
• 2.5-mm × 2.5-mm, 10-pin WSON package

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 TPS7A90 is a low-noise (4.7 μVRMS), low-dropout
(LDO) voltage regulator capable of sourcing 500 mA
with only 100 mV of maximum dropout to 5 V and
200 mV to 5.7 V.
The TPS7A90 output is adjustable with external
resistors from 0.8 V to 5.7 V. The TPS7A90 wide
input voltage range supports operation as low as
1.4 V and up to 6.5 V.
With 1% output voltage accuracy (over line, load, and
temperature) and soft-start capabilities to reduce inrush
current, the TPS7A90 is ideal for powering
sensitive analog low-voltage devices [such as
voltage-controlled oscillators (VCOs), analog-to-digital
converters (ADCs), and digital-to-analog converters
(DACs)].
The TPS7A90 is designed to power noise-sensitive
components such as those found in high-speed
communication, video, medical, or test and
measurement applications. The very low 4.7-μVRMS
output noise and wideband PSRR (30 dB at 1 MHz)
minimizes phase noise and clock jitter. These
features maximize performance of clocking devices,
ADCs, and DACs.