1 Features

• Ultra-low output noise:

– 0.46 μVRMS (typ, 10 Hz to 100 kHz)

• High power-supply ripple rejection (PSRR):

– 102 dB at 100Hz

– 110 dB at 1 kHz

– 95 dB at 10 kHz

– 78 dB at 100 kHz

– 50 dB at 1 MHz

• Accuracy over line, load, and temperature: 1

• Low dropout: 150 mV at 1 A

• Wide input voltage range: 1.7 V to 5.7 V

• Wide output voltage range: 0 V to 5.5 V

• Parallelable for lower noise and higher current

• Fast transient response

• Precision enable and UVLO

• Programmable current limit

• Programmable PG threshold

• Adjustable start-up inrush control

• Open-drain, power-good (PG) output

• Package: 3.00-mm × 3.00-mm, 10-pin WSON:

– JEDEC RθJA: 46.1°C/W

– EVM RθJA: 25.6°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 TPS7A94 is an ultra-low-noise (0.46 μVRMS), lowdropout

(LDO) voltage regulator capable of sourcing

1 A with only 150 mV of dropout. The low dropout,

in conjunction with a wide bandwidth error amplifier,

allows for very high PSRR (110 dB at 1 kHz and

50 dB at 1 MHz) under low operating headroom

(500 mV) and high output current (750 mA).

The device output is adjustable from 0 V to 5.5 V with

an external resistor. With its wide input voltage range,

the device supports operation as low as 1.7 V and up

to 5.7 V. The device includes programmable current

limit, programmable PG threshold, and precision

enable, allowing better control in the application.

With its high-accuracy reference and wide-bandwidth

topology, the device can be easily paralleled to

achieve lower noise and higher current.

With 1 output voltage accuracy (over line, load,

and temperature) and soft-start capabilities to reduce

inrush current, the device is an excellent choice for

powering sensitive analog low-voltage devices.