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TPS79301DBVRM3Q1

TITPS79301DBVRM3Q1

Texas Instruments
Linear Voltage Regulator IC Positive Adjustable 1 Output 200mA SOT-23-6
Active2,990 in stock
Datasheet Digi-Key Compare Prices

Overview

The TPS79301DBVRM3Q1 is an AEC-Q100 qualified low-dropout (LDO) linear regulator designed for sensitive automotive and RF applications. It provides a highly stable adjustable output from 1.225V up to 5V with a maximum current of 200mA and high Power Supply Rejection Ratio (PSRR) to minimize ripple. This specific variant is optimized for low noise and features a fast start-up time of approximately 50 microseconds.

Why Choose This Part

This regulator features an exceptionally high PSRR of 70dB at 100Hz, making it ideal for removing power supply ripple. It is automotive qualified (AEC-Q100) and includes an internal soft-start to reduce inrush current, while maintaining stability with small 2.2uF ceramic capacitors.

Applications

Automotive ADAS Sensors
Providing clean power to radar and camera modules where low noise and high PSRR are critical for signal integrity.
RF Low-Noise Amplifiers
Regulating voltage for sensitive RF stages to ensure minimal phase noise and high performance in communication circuits.
Infotainment Systems
Stable power regulation for high-speed digital processors and analog audio stages within vehicle cockpits.
VCO and PLL Power
Filtering power supply noise for voltage-controlled oscillators and phase-locked loops in automotive networking.

Key Specifications

PSRR 70dB ~ 39dB (100Hz ~ 100kHz)
Output Type Adjustable
Mounting Type Surface Mount
Package / Case SOT-23-6
Control Features Enable
Current - Output 200mA
Protection Features Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Number of Regulators 1
Output Configuration Positive
Operating Temperature -40degC ~ 125degC (TA)
Voltage - Input (Max) 5.5V
Current - Supply (Max) 1 mA
Voltage - Output (Max) 5V
Supplier Device Package SOT-23-6
Current - Quiescent (Iq) 1 mA
Voltage - Output (Min/Fixed) 1.225V

Getting Started

To implement this LDO, ensure the EN pin is properly driven for sequencing and place a 2.2uF ceramic capacitor close to the output pin for stability. Thermal design should account for the SOT-23 package power dissipation limits when operating at the full 200mA output near the 5.5V input maximum.

TPS79301 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Protection Features Temp Range Voltage - Output (Max) Output V Stock
TPS79301DBVRM3Q1 (this part) Over Current, Over.. -40degC ~ 125degC .. 5V 1.225V 2,990
TPS79301DBVRM3 Over Current, Over.. -40degC ~ 125degC .. 5.5V 1.22V 2,966