Chinese chips

RUNIC launches the first voltage-following LDO RS3011-Q1

May 09, 2025

RUNIC launches the first voltage-following LDO RS3011-Q1

 

 

The voltage-following low-dropout linear regulator chip (LDO) is a special type of LDO regulator whose output voltage (VOUT) directly tracks or "follows" its reference input voltage (VREF), that is, VOUT=VREF.

 

This type of LDO is usually used to power off-board sensors or other off-board modules in automobiles to ensure the accuracy and stability of the sensor's operating voltage, and to prevent damage to on-board components due to short circuits to the ground or battery short circuits caused by cable breakage.

 

RS3011-Q1 adopts automotive-grade technology and maximizes safety margin design. It has an input withstand voltage of -40V to 45V and provides a maximum output current of 300mA, meeting the high reliability requirements of automotive electronic application scenarios.

 

Its main features are as follows:

Ø Input limit voltage supports -40V~45V;

Ø Adjustable output voltage range 1.5V to 40V;

Ø Self-consumption current 80μA under light load;

Ø Provides maximum output current capability of 300mA;

Ø Maximum 4mV tracking error output;

Ø High power supply ripple suppression capability, PSRR reaches 78dB@100Hz;

Ø Low Dropout voltage, 280mV@200mA;

Ø Reverse polarity protection;

Ø Output short circuit to ground protection, output short circuit to power supply protection;

Ø Output foot inductive load clamp protection;

Ø With over-temperature protection and over-current protection;

 

Typical application circuit Voltage follower LDO is mainly designed for special circuit protection in the field of automotive electronics applications. Of course, it can also be used in other power supply systems that require real-time adjustable power supply. For example, by controlling the DAC to directly give the required output voltage to the ADJ foot, a high-precision real-time adjustable power supply can be achieved. RS3011-Q1 has an internal back-to-back PMOS topology, which can achieve reverse polarity protection without the use of external diodes. It is particularly suitable for circuits that require reverse connection and backflow protection. RS3011-Q1 provides a standard ESOP8 package, which is fully compatible with commonly used models in the market, and provides two versions with and without enable to meet the design requirements of different product systems. RS3011-Q1 automotive-grade certification is in progress, and samples have been put into storage. You are welcome to request samples for comparison testing.

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