Automotive, 50mA 85V ultra-low-IQ low-dropout (LDO) regulator with power good and precision enable

The TPS7A43-Q1 is a

wide input, low-dropout (LDO) linear voltage regulator with 4V to 85V input voltage range and very-low quiescent current. This device can

support a wide range of input voltages and withstand line transient voltages up to

90V (200ms), making the device a good fit for direct connection to 48V, 24V, or 12V

automotive battery. Ultra-low IQ of 5.5µA typical, 9µA maximum helps meet

stringent system requirements and extends battery life in battery-connected

applications.

The TPS7A43-Q1 output

(OUT) is available in both fixed and adjustable output versions, with regulation from 1.24V

to 14.5V and ±0.85% accuracy across temperature. The device is intended for use in an array

of automotive applications, including supply for always-on loads like microcontrollers and

wake-up functionality for various ICs (for example, CAN). The device is an efficient option

to provide power to critical components during system sleep conditions. The TPS7A43-Q1 also features an intermediate output (MIDOUT) that can

be set to 10V, 12V, or 15V using the MVSEL pins. MIDOUT can supply power for LIN or be used

to bias amplifiers, minimizing system complexity by eliminating the need for additional

regulators.

The TPS7A43-Q1 features a precision enable input that enables or disables the LDO at a fixed and accurate threshold voltage using a resistor divider from the input.

The power-good (PG) output is used to monitor the

voltage at the feedback pin to indicate the status of the output voltage. Use the EN

input and PG output for sequencing multiple power sources in the system.