TPS7B4261-Q1中文资料德州仪器数据手册PDF规格书

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 supply off-board sensors in an automotive

environment. The high 300mA current rating of the

device potentially allows a single TPS7B4261-Q1

to power multiple off-board sensors simulataneously.

Because the risk of failure in cables that deliver

off-board power is high, the device comes with

integrated protection features against fault conditions

such as short to battery, reverse polarity, output

short to ground (current limit), and overtemperature

(thermal shutdown). The device incorporates a backto-

back P-channel metal-oxide semiconductor fieldeffect

transistor (PMOS) topology. This topology

eliminates the need for an otherwise required external

diode that helps protect against fault conditions

that result in flow of reverse current. The device

is designed to handle a 45V (absolute maximum)

input voltage and survive the automotive load dump

transient conditions.

A reference voltage applied at the adjustable input

pin (ADJ) is tracked with a very tight 6mV (max)

tolerance across line, load, and temperature at the

OUT pin. This tight tracking tolerance enables the

TPS7B4261-Q1 to deliver a power-supply voltage

with high precision for loads up to 300mA. 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 which the quiescent

current consumption of the low-dropout regulator

(LDO) reduces to less than 3.8μA (max).