TPS7A8101 Low-Dropout Linear Regulator 1A Adjustable – Texas Instruments

Texas Instruments TPS7A8101 – Ultra-Low-Noise, 1A LDO Regulator for Analog Precision

The TPS7A8101 from Texas Instruments is a high-performance, low-noise low-dropout (LDO) regulator capable of sourcing up to 1A of output current. Designed to meet the stringent noise and PSRR requirements of analog and RF circuitry, this device delivers an impressive power supply ripple rejection of 70 dB at 1 kHz, helping maintain signal integrity in sensitive applications.

Its wide input voltage range of 1.4V to 6.5V and adjustable output voltage from 0.8V to 5.0V allow flexible power rail configurations across mixed-signal, industrial, and communication designs. With an ultra-low dropout voltage of just 200 mV at 1A, the TPS7A8101 enables efficient regulation even under low VIN-VOUT conditions.

Key Electrical Specifications

Parameter	Value	Unit
Output Current	1.0	A
Dropout Voltage @ 1A	200	mV
Input Voltage Range	1.4 to 6.5	V
Output Voltage Range	0.8 to 5.0	V
Power Supply Rejection (1 kHz)	70	dB
Operating Temperature	-40 to +125	°C
Package	WSON-6, SOT-23-5	–

Advantages Over Typical LDO Alternatives

The TPS7A8101 offers industry-leading performance in terms of noise, PSRR, and dropout efficiency. Unlike traditional LDOs that sacrifice thermal performance for small form factors, this device maintains both power density and thermal robustness. Trusted by IC Manufacturer engineers worldwide, it is a go-to solution for powering precision analog sensors and high-frequency signal paths.

Functional Highlights and System Benefits

• Low Dropout Performance: Ideal for post-regulation in low-voltage SoCs and DSP systems.
• Excellent PSRR: Suppresses input noise from switching regulators, ensuring clean analog outputs.
• Adjustable Soft Start: Protects against inrush current and allows controlled power sequencing.
• Thermal Shutdown and OCP: Enhances system reliability in industrial and portable environments.
• Small Footprint: Available in compact WSON-6 and SOT-23-5 packages for space-constrained PCBs.

Typical Applications

• Analog and Mixed-Signal Circuits
• RF Power Supply Rails
• Precision Instrumentation
• Post-Regulation for DC-DC Converters
• Low-Noise Clocking Systems

Frequently Asked Questions (FAQ)

What makes TPS7A8101 suitable for low-noise analog applications?

It delivers 70 dB PSRR at 1 kHz and features ultra-low output noise, enabling optimal performance in precision and RF signal paths.

Can TPS7A8101 power sensitive devices directly?

Yes, the low dropout and clean output make it suitable for direct powering of sensitive analog ICs like ADCs, DACs, and clocks.

Does TPS7A8101 support soft-start configuration?

Yes, the regulator supports adjustable soft-start via external capacitor, allowing smooth power-up and reduced inrush current.

What are the packaging options for this regulator?

It comes in small WSON-6 and SOT-23-5 packages, ideal for compact PCB designs without compromising heat dissipation.

Is the device suitable for portable or battery-powered equipment?

Absolutely. With its low dropout, low quiescent current, and compact packaging, TPS7A8101 is optimized for portable designs.