1 Features
• AEC-Q100 qualified for automotive applications:
– Temperature Grade 1: −40°C to +125°C, TA
– Junction temperature: −40°C to +150°C, TJ
• Wide input voltage range: 4V to 85V
– Supports direct connection to 48V, 24V, or 12V
automotive battery
• Wide output voltage range (VOUT):
– Adjustable: 1.24V to 14.5V
– Fixed: 3.3V, 5.0V
• Selectable intermediate output (VMID_OUT):
– 10V, 12V, 15V
• Output current:
– 50mA (shared between OUT and MID_OUT)
• ±0.8% VOUT accuracy over full temperature range
• Ultra-low IQ: 5.5μA (typical)
• Precision enable
• Power-good (PG) output
• High PSRR at 100kHz:
– 73dB (OUT)
– 47dB (MID_OUT)
• Thermal shutdown and overcurrent protection
• Package:
– 10-pin HVSSOP (DGQ) [RθJA = 51.5°C/W]

2 Applications
• Automotive body motors
• Zone and body domain controller
• Thermal management
• Car access and security systems
• HEV/EV battery-management system (BMS)

3 Description
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 designed 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 ±0.8% 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 a second intermediate
output (MID_OUT) that can be set to 10V, 12V,
or 15V using the MVSEL pins. MID_OUT 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. The EN input and PG output can
be used for sequencing multiple power sources in the
system.