TPS7A9401DSCR

The TPS7A94 is an ultra-low-noise (0.46 μV_RMS), 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.

Applications

• Macro remote radio units (RRU)
• Outdoor backhaul units
• Active antenna system mMIMO (AAS)
• Ultrasound scanners
• Lab and field instrumentation
• Sensor, imaging, and radar

Key features

• Ultra-low output noise: – 0.46 μV_RMS (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