1 Features

• AEC-Q100 qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

– Temperature grade 1: –40°C to +150°C, TJ

• 3V to 40V wide VIN input voltage range with up to

45V transient

• Maximum output current: 150mA

• Low quiescent current IQ:

– 300nA typical when EN = low (shutdown mode)

– 2.7μA typical at light loads

– 4.5μA maximum at light loads

• 1.5% output-voltage accuracy over line, load and

temperature

• Maximum dropout voltage: 540mV at 150mA load

current for fixed 5V output version

• Stable with low-ESR (0.001Ω to 5Ω) ceramic

output-stability capacitor (1μF to 200μF)

• Fixed output voltage: 5V, 3.3V, and 2.5V

• Integrated fault protection:

– Thermal shutdown

– Short-circuit and overcurrent protection

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Packages:

– DGN (8-pin HVSSOP), RθJA = 63.9°C/W

– DRV (6-pin WSON), RθJA = 72.8°C/W

– DRV (6-pin WSON wettable flank), RθJA =

72.8°C/W

– KVU (5-pin TO-252), RθJA = 38.8°C/W

2 Applications

• Automotive head units

• Headlights

• Battery management systems (BMS)

• Inverter and motor controls

3 Description

In automotive battery-connected applications, low

quiescent current (IQ) is important to conserve energy

and to extend battery lifetime. Always-on systems

must have ultra-low IQ over an extended temperature

range to enable sustained operation when the vehicle

ignition is off.

The TPS7B81-Q1 is a low-dropout (LDO) linear

regulator designed for up to 40V VIN applications.

With only a 2.7μA typical quiescent current at light

load, the device is an optimum design for powering

microcontrollers and controller area network and

local interconnect network (CAN/LIN) transceivers in

standby systems.

The device features integrated short-circuit and

overcurrent protection. This device operates in

ambient temperatures from –40°C to +125°C and

with junction temperatures from –40°C to +150°C.

Additionally, this device is available in several

packages of varying size and thermal conductivity.

The compact WSON package comes in a wettable

flank option. The TO-252 package enables sustained

operation despite significant dissipation across the

device. These features make the device well suited

as a power supply for various battery-connected

automotive applications.