50-mA, 85-V, ultra-low IQ, dual low-dropout voltage regulator with power good and precision enable

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.

This device can support a

wide range of input voltages (for example, a 15-s battery and 24-V

to 48-V line power) and withstand line

transient voltages up to 85 V. These features help modern

applications meet increasingly stringent energy requirements, and

help extend battery life in portable-power solutions.

The TPS7A43 output (OUT) is available

in both fixed and adjustable output versions, which can regulate

from 1.24 V to 14.5 V at 1% accuracy. The device also provides a

second intermediate output (MIDOUT) that can be set to 10 V, 12 V,

and 15 V using the MVSEL pins and can be used to bias gate drivers

in place of a discrete regulator.

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.