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

• Output voltage:

– Wide operating range: 2V to 40V

– Output voltage flexibility: Scale VOUT to values

that are higher or lower than the reference

using external resistors in a voltage divider

configuration

• Maximum output current: 150mA

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

• Low dropout voltage: 250mV at 150mA

• Combined enable and reference functionalities

• 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 the HSOIC (DDA) low thermal

resistance (RθJA = 48°C/W) 8-pin package

2 Applications

• Powertrain pressure sensors

• Powertrain temperature sensors

• Powertrain exhaust sensors

• Powertrain fluid concentration sensors

• Body control modules (BCM)

• Zone control modules

• HVAC control modules

3 Description

The TPS7B4258-Q1 is a monolithic, integrated, lowdropout

(LDO) voltage tracker. The device is available

in an 8-pin HSOIC package. The TPS7B4258-Q1

is designed to reliably provide power to off-board

sensors via 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 TPS7B4258-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 150mA

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.