TPS7B4255-Q1 Series

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

Catalog

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

Catalog

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

Key Features

• AEC-Q100 qualified for automotive applications:Temperature grade 1: –40°C to +125°C, TAJunction temperature: –40°C to +150°C, TJWide input operating voltage range (3 V to 40 V):Absolute maximum input voltage range: –40 V to +45 VWide output voltage range: 2 V to 40 VMaximum output current: 70 mAVery-tight, output-tracking tolerance: 5 mV (max)Low dropout voltage: 500 mV (max) at 70 mACombined reference and enable functionalitiesLow quiescent current at light load: 35 µAWide COUT and ESR range:Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESRIntegrated protection features:Reverse current protectionReverse polarity protectionOvertemperature protectionProtection against output short-circuit to ground and supplyAvailable in two 5-pin SOT-23 packages:Standard SOT-23 (DBV)Thermally enhanced SOT-23 (DYB)AEC-Q100 qualified for automotive applications:Temperature grade 1: –40°C to +125°C, TAJunction temperature: –40°C to +150°C, TJWide input operating voltage range (3 V to 40 V):Absolute maximum input voltage range: –40 V to +45 VWide output voltage range: 2 V to 40 VMaximum output current: 70 mAVery-tight, output-tracking tolerance: 5 mV (max)Low dropout voltage: 500 mV (max) at 70 mACombined reference and enable functionalitiesLow quiescent current at light load: 35 µAWide COUT and ESR range:Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESRIntegrated protection features:Reverse current protectionReverse polarity protectionOvertemperature protectionProtection against output short-circuit to ground and supplyAvailable in two 5-pin SOT-23 packages:Standard SOT-23 (DBV)Thermally enhanced SOT-23 (DYB)

Description

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. 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.