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:

– Absolute maximum range: –40V to 45V

– Operating range: 3.3V to 40V

• Wide output voltage range: 2V to 40V

• Maximum output current: 300mA

• Very tight output-tracking tolerance: 6mV (max)

• Low dropout voltage: 330mV at 200mA

• Independent enable pin functionality

• Power-good functionality detects under- and

overvoltage conditions

• Low quiescent current at light load: 55μA

• Stable over a wide range of ceramic output

capacitor values:

– COUT range: 1μF to 100μF

– ESR range: 1mΩ to 2Ω

• Integrated protection features:

– Reverse current protection

– Reverse polarity protection

– Overtemperature protection

– Protection against output short circuit to ground

and supply

• Available in a low thermal resistance, 8-pin

package:

– HSOIC (DDA), RθJA = 48℃/W

2 Applications

• Powertrain pressure sensors

• Powertrain temperature sensors

• Powertrain exhaust sensors

• Powertrain fluid concentration sensors

• Body control modules (BCM)

• Zone control modules (ZCM)

• HVAC control modules

3 Description

The TPS7B4261-Q1 is a monolithic, integrated lowdropout

voltage tracker. The device is available

in an 8-pin HSOIC package. The TPS7B4261-

Q1 is designed to reliably provide power to offboard

sensors with a wire harness, even in harsh

automotive environments. In such severe operating

conditions, the cables in the harness are potentially

exposed to various fault conditions, increasing risk of

failure. Such conditions include short to ground, short

to battery, and overtemperature. The TPS7B4261-Q1

comes with integrated protection features against

each of these fault conditions, as well as protection

against reverse polarity. The device incorporates

a topology containing two back-to-back P-channel

metal-oxide semiconductor field-effect transistors

(MOSFETs). This PMOS topology eliminates the need

for an external diode that is otherwise required to

prevent the flow of reverse current. The high 300mA

current rating of the device potentially allows a

single tracker to power multiple off-board sensors

simultaneously. The device is designed to handle a

45V (absolute maximum) input voltage and survive

the automotive load dump transient conditions.

The TPS7B4261-Q1 features an independent enable

pin (EN) and power-good functionality that detects

both under- and overvoltage fault conditions. By

setting the EN input pin low, the TPS7B4261-Q1

switches to standby mode. In this mode the quiescent

current consumption of the LDO is less than 3.8μA

(max).