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.