TPS7B4256-Q1 Series

Automotive, 70-mA 40-V voltage-tracking low-dropout regulator with FB and 6-mV tracking tolerance

Catalog

Automotive, 70-mA 40-V voltage-tracking low-dropout regulator with FB and 6-mV tracking tolerance

Part	Voltage - Output (Min/Fixed) [Min]	Current - Supply (Max) [Max]	Output Type	Current - Quiescent (Iq)	Qualification	Operating Temperature [Min]	Operating Temperature [Max]	Control Features	Voltage - Output (Max) [Max]	Output Configuration	PSRR	Number of Regulators	Voltage Dropout (Max) [Max]	Supplier Device Package	Current - Output	Mounting Type	Protection Features	Grade	Package / Case [y]	Package / Case [x]	Package / Case
Texas Instruments TPS7B4256QDDARQ1	2 V	1 mA	Adjustable	70 µA	AEC-Q100	-40 °C	125 °C	Current Limit Enable	40 V	Positive	80 dB	1	0.225 V	8-SO PowerPad	70 mA	Surface Mount	Over Current Over Temperature Reverse Current Reverse Polarity Short Circuit Under Voltage Lockout (UVLO)	Automotive	3.9 mm	0.154 in	8-PowerSOIC
Texas Instruments TPS7B4256QDRQ1	2 V		Adjustable	70 µA		-40 °C	125 °C		40 V	Positive		1	0.225 V	8-SOIC	70 mA	Surface Mount	Over Current Over Temperature Reverse Current Reverse Polarity Short Circuit Under Voltage Lockout (UVLO)		3.9 mm	0.154 in	8-SOIC

Catalog

Automotive, 70-mA 40-V voltage-tracking low-dropout regulator with FB and 6-mV tracking tolerance

Key Features

• AEC-Q100 qualified for automotive applications:Temperature grade 1: –40°C to +125°C, T AJunction temperature: –40°C to +150°C, T JWide input voltage range:Absolute maximum range: –40 V to +45 VOperating range: 3 V to 40 VOutput voltage:Wide operating range: 2 V to 40 VOutput voltage flexibility: V OUT can be scaled to values that are higher or lower than the reference using external resistors in a voltage divider configurationMaximum output current: 70 mAVery tight output-tracking tolerance: 6 mV (max)Low dropout voltage: 225 mV (max) at 70 mACombined enable and reference functionalitiesLow quiescent current at light load: 60 µAStable over a wide range of ceramic output capacitor values:C OUT range: 1 µF to 100 µFESR range: 1 mΩ to 2 ΩIntegrated protection features:Reverse current protectionReverse polarity protectionOvertemperature protectionProtection against output short circuit to ground and supplyAvailable in the following low thermal resistance 8-pin packages :HSOIC (DDA), R θJA = 53.3°C/WSOIC (D), R θJA = 101°C/WAEC-Q100 qualified for automotive applications:Temperature grade 1: –40°C to +125°C, T AJunction temperature: –40°C to +150°C, T JWide input voltage range:Absolute maximum range: –40 V to +45 VOperating range: 3 V to 40 VOutput voltage:Wide operating range: 2 V to 40 VOutput voltage flexibility: V OUT can be scaled to values that are higher or lower than the reference using external resistors in a voltage divider configurationMaximum output current: 70 mAVery tight output-tracking tolerance: 6 mV (max)Low dropout voltage: 225 mV (max) at 70 mACombined enable and reference functionalitiesLow quiescent current at light load: 60 µAStable over a wide range of ceramic output capacitor values:C OUT range: 1 µF to 100 µFESR range: 1 mΩ to 2 ΩIntegrated protection features:Reverse current protectionReverse polarity protectionOvertemperature protectionProtection against output short circuit to ground and supplyAvailable in the following low thermal resistance 8-pin packages :HSOIC (DDA), R θJA = 53.3°C/WSOIC (D), R θJA = 101°C/W

Description

The TPS7B4256-Q1 is a monolithic, integrated, low-dropout (LDO) voltage tracker. The device is available in 8-pin SOIC and HSOIC packages. The TPS7B4256-Q1 is designed to provide power supply to off-board sensors in an automotive environment. 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 back-to-back PMOS topology that eliminates the need for an external diode that is otherwise required to help protect against fault conditions that result in flow of reverse current. 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 adjustable input pin (ADJ/EN) is tracked with a very tight 6 mV (max) tolerance at the FB pin across temperature. This tracking enables the TPS7B4256-Q1 to deliver a power-supply voltage with high precision for loads up to 70 mA. The reference voltage can be directly connected to the ADJ/EN pin or scaled down to lower values with the help of an external resistor divider at the ADJ/EN pin to a minimum of 2 V. The output voltage can be made equal to the voltage at the ADJ/EN pin (± the tracking tolerance) by tying the FB pin directly to the OUT pin or scaled to higher values with the help of a resistive voltage divider between the FB and the OUT pin. The TPS7B4256-Q1 provides an effective buffer to the reference voltage of an ADC and securely transmits this voltage (or a scaled version thereof) over a long cable to power off-board sensors. If the sensor is ratiometric and the output is sampled by the ADC, the described features of the TPS7B4256-Q1 help significantly improve the reliability and accuracy of the sensor measurements. By setting the ADJ/EN input pin low, the TPS7B4256-Q1 switches to standby mode and reduces the quiescent current consumption of the LDO to less than 3.5 µA. The TPS7B4256-Q1 is a monolithic, integrated, low-dropout (LDO) voltage tracker. The device is available in 8-pin SOIC and HSOIC packages. The TPS7B4256-Q1 is designed to provide power supply to off-board sensors in an automotive environment. 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 back-to-back PMOS topology that eliminates the need for an external diode that is otherwise required to help protect against fault conditions that result in flow of reverse current. 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 adjustable input pin (ADJ/EN) is tracked with a very tight 6 mV (max) tolerance at the FB pin across temperature. This tracking enables the TPS7B4256-Q1 to deliver a power-supply voltage with high precision for loads up to 70 mA. The reference voltage can be directly connected to the ADJ/EN pin or scaled down to lower values with the help of an external resistor divider at the ADJ/EN pin to a minimum of 2 V. The output voltage can be made equal to the voltage at the ADJ/EN pin (± the tracking tolerance) by tying the FB pin directly to the OUT pin or scaled to higher values with the help of a resistive voltage divider between the FB and the OUT pin. The TPS7B4256-Q1 provides an effective buffer to the reference voltage of an ADC and securely transmits this voltage (or a scaled version thereof) over a long cable to power off-board sensors. If the sensor is ratiometric and the output is sampled by the ADC, the described features of the TPS7B4256-Q1 help significantly improve the reliability and accuracy of the sensor measurements. By setting the ADJ/EN input pin low, the TPS7B4256-Q1 switches to standby mode and reduces the quiescent current consumption of the LDO to less than 3.5 µA.