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 the 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 the 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.