1 Features

• Input voltage range:

– 1.1V to 2.2V

• Output voltage noise: 2.2μVRMS

• 1.5% (max) accuracy over line, load, and

temperature

• Low dropout: 95mV(typ) at 3A

• Power-supply rejection ratio (3A):

– 80dB at 1kHz

– 63dB at 10kHz

– 51dB at 100kHz

– 25dB at 1MHz

• Adjustable output voltage range: 0.5V to 1.5V

• Adjustable soft-start inrush control

• Open-drain, power-good (PG) output

• Package: 3mm × 3mm, 16-pin WQFN

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 TPS7N53 is a low-noise (2.2μVRMS), ultra-lowdropout

linear regulator (LDO) capable of sourcing

3A with only 95mV of dropout (typ), independently

of the output voltage. The device output voltage

is adjustable from 0.5V to 1.5V using a single

external resistor. The combination of low noise, high

PSRR, and high output-current capability makes

the TPS7N53 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

(1.5% 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 serializers/deserializers (SerDes), FPGAs,

and DSPs.