TPS7B4256QDDARQ1
ActiveAUTOMOTIVE, 70-MA 40-V VOLTAGE-TRACKING LOW-DROPOUT REGULATOR WITH FB AND 6-MV TRACKING TOLERANCE
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TPS7B4256QDDARQ1
ActiveAUTOMOTIVE, 70-MA 40-V VOLTAGE-TRACKING LOW-DROPOUT REGULATOR WITH FB AND 6-MV TRACKING TOLERANCE
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Technical Specifications
Parameters and characteristics for this part
| Specification | TPS7B4256QDDARQ1 |
|---|---|
| Control Features | Enable, Current Limit |
| Current - Output | 70 mA |
| Current - Quiescent (Iq) | 70 µA |
| Current - Supply (Max) [Max] | 1 mA |
| 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 | 8-PowerSOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| 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 | 8-SO PowerPad |
| Voltage - Output (Max) [Max] | 40 V |
| Voltage - Output (Min/Fixed) [Min] | 2 V |
| Voltage Dropout (Max) [Max] | 0.225 V |
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 | $ 1.64 | |
| 10 | $ 1.47 | |||
| 25 | $ 1.39 | |||
| 100 | $ 1.15 | |||
| 250 | $ 1.07 | |||
| 500 | $ 0.95 | |||
| 1000 | $ 0.75 | |||
| Digi-Reel® | 1 | $ 1.64 | ||
| 10 | $ 1.47 | |||
| 25 | $ 1.39 | |||
| 100 | $ 1.15 | |||
| 250 | $ 1.07 | |||
| 500 | $ 0.95 | |||
| 1000 | $ 0.75 | |||
| Tape & Reel (TR) | 2500 | $ 0.70 | ||
| 5000 | $ 0.66 | |||
| 12500 | $ 0.64 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.22 | |
| 100 | $ 0.94 | |||
| 250 | $ 0.69 | |||
| 1000 | $ 0.49 | |||
Description
General part information
TPS7B4256-Q1 Series
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.
Documents
Technical documentation and resources
