The TPS7A43 low-dropout (LDO) linear voltage regulator introduces a combination of a 4-V to 85-V input voltage range with very-low quiescent current (IQ).
This device can support a wide range of input voltages (for example, a 15s battery and 24-V to 48-V line power) and withstand line transient voltages up to 85 V. These features help modern appliances meet increasingly stringent energy requirements, and help extend battery life in portable-power solutions.
The TPS7A43 is available in both fixed and adjustable output versions. Fixed output options are available in standard voltage options and the adjustable output version uses external feedback resistors to set the output voltage from 1.24 V to 14.5 V. The main output (OUT) has a 1% output regulation accuracy that provides precision regulation for most microcontroller (MCU) references. The device also provides a second intermediate output (MID_OUT) that can be used to bias gate drivers in place of a discrete regulator. The MID_OUT uses two logic pins (MVSEL1 and MVSEL2) to adjust the intermediate output rail between 10 V, 12 V, or 15 V.
The TPS7A43 features a precision enable input that helps enable or disable 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. The EN input and PG output can be used for sequencing multiple power sources in the system. The built-in current limit and thermal shutdown help protect the regulator in the event of a load short or fault.