1 Features

• Input voltage range:

– Without BIAS: 1.1 V to 6.0 V

– With BIAS: 0.7 V to 6.0 V

• Output voltage noise: 2.45 μVRMS

• 1 (max) accuracy over line, load, and

temperature

• Low dropout: 75 mV at 5 A

• Power-supply rejection ratio (5 A):

– 100 dB at 1 kHz

– 78 dB at 10 kHz

– 60 dB at 100 kHz

– 36 dB at 1 MHz

• Superior load transient response:

– ±2 mV with a 100-mA to 5-A load step

• Adjustable output voltage range: 0.5 V to 5.2 V

• Adjustable soft-start inrush control

• BIAS rail:

– Internal charge pump or 3-V to 11-V external

rail

– Internal charge pump can be disabled

• Open-drain, power-good (PG) output

• Package: 3-mm × 3-mm, 16-pin WQFN

– EVM RθJA: 21.9°C/W

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 TPS7A57 is a low-noise (2.45 μVRMS), ultra-lowdropout

linear regulator (LDO) capable of sourcing

5 A with only 75 mV of dropout, independently

of the output voltage. The device output voltage

is adjustable from 0.5 V to 5.2 V using a single

external resistor. The combination of low noise,

high PSRR (36 dB at 1 MHz), and high outputcurrent

capability makes the TPS7A57 designed

for powering noise-sensitive components (such as

RF amplifiers, radar sensors, SERDES and analog

chipsets) found in radar power, communication, and

imaging applications.

Digital loads [such as application-specific integrated

circuits (ASICs), field-programmable gate arrays

(FPGAs), and digital signal processors (DSPs)]

requiring low-input, low-output (LILO) voltage

operation also benefit from the exceptional accuracy

(1 over load, line, and temperature), remote

sensing, excellent transient performance, and

soft-start capabilities to provide optimal system

performance. The versatility, performance, and small

footprint solution make this LDO an excellent choice

for high-current analog loads such as analog-todigital

converters (ADCs), digital-to-analog converters

(DACs), and imaging sensors as well as digital loads

such as serializer/deserializers (SerDes), FPGAs, and

DSPs.