Specification	TPS7B4255QDBVRQ1

Control Features	Tracking, Current Limit
Current - Output	70 mA
Current - Quiescent (Iq)	50 çA
Current - Supply (Max) [Max]	550 µA
Grade	Automotive
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	SC-74A, SOT-753
Protection Features	Under Voltage Lockout (UVLO), Over Temperature, Over Current, Reverse Current, Reverse Polarity, Short Circuit
PSRR	80 dB
Qualification	AEC-Q100
Supplier Device Package	SOT-23-5
Voltage - Output (Max) [Max]	40 V
Voltage - Output (Min/Fixed) [Min]	2 V
Voltage Dropout (Max) [Max]	0.5 V

TPS7B4255-Q1 Series

Automotive, 70-mA 40-V voltage-tracking low-dropout (LDO) regulator with 5-mV tracking tolerance

Part	Protection Features	Output Type	Current - Quiescent (Iq)	Mounting Type	Voltage Dropout (Max) [Max]	Voltage - Output (Max) [Max]	Output Configuration	Current - Output	Package / Case	Qualification	PSRR	Current - Supply (Max) [Max]	Supplier Device Package	Grade	Number of Regulators	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Output (Min/Fixed) [Min]	Control Features
Texas Instruments TPS7B4255QDBVRQ1	Over Current Over Temperature Reverse Current Reverse Polarity Short Circuit Under Voltage Lockout (UVLO)	Adjustable	50 çA	Surface Mount	0.5 V	40 V	Positive	70 mA	SC-74A SOT-753	AEC-Q100	80 dB	550 µA	SOT-23-5	Automotive	1	-40 °C	125 °C	2 V	Current Limit Tracking
Texas Instruments TPS7B4255QDYBRQ1	Over Current Over Temperature Reverse Current Reverse Polarity Short Circuit Under Voltage Lockout (UVLO)	Adjustable	50 çA	Surface Mount	0.5 V	40 V	Positive	70 mA	SC-74A SOT-753	AEC-Q100	80 dB	550 µA	SOT-23-5	Automotive	1	-40 °C	125 °C	2 V	Current Limit Enable

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 1.49
		10	$ 1.33
		25	$ 1.27
		100	$ 1.04
		250	$ 0.97
		500	$ 0.86
		1000	$ 0.68
	Digi-Reel®	1	$ 1.49
		10	$ 1.33
		25	$ 1.27
		100	$ 1.04
		250	$ 0.97
		500	$ 0.86
		1000	$ 0.68
	Tape & Reel (TR)	3000	$ 0.48
		6000	$ 0.46
		15000	$ 0.44
Texas Instruments	LARGE T&R	1	$ 0.84
		100	$ 0.64
		250	$ 0.47
		1000	$ 0.34

Description

General part information

TPS7B4255-Q1 Series

The TPS7B4255-Q1 is a low-dropout (LDO) voltage-tracking regulator, with high tracking accuracy and excellent load and line transient response. The device is available in two 5-pin, SOT-23 packages (DBV and DYB). The TPS7B4255-Q1 is designed to supply off-board sensors in automotive applications such as powertrain systems. 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 reverse current (short to battery), reverse polarity, output short to ground (current limit), and overtemperature (thermal shutdown). The device is designed to handle a 45-V (absolute maximum) input voltage and survive the automotive load dump transient conditions.

A reference voltage applied at the ADJ/EN pin is effectively tracked at the OUT pin with very tight tolerance for loads up to 70 mA. The TPS7B4255-Q1 can therefore deliver the power-supply voltage to the off-board sensors with high precision, which can help improve the reliability and accuracy of measurements made using ratiometric sensors.

By setting the ADJ/EN input pin low, the TPS7B4255-Q1 switches to standby mode and reduces the quiescent current of the LDO to less than 3.25 µA.