The TPS7B8601QDDARQ1 from Texas Instruments is an automotive-grade, ultra-low-quiescent-current low-dropout linear regulator from the TPS7B86-Q1 family. It is designed for direct connection to automotive battery rails and supports a 3V to 40V input range, with a 42V absolute maximum input rating for automotive transient environments.
The “01” output code identifies the adjustable-output version, providing an output-voltage range of 1.2V to 18V through an external feedback-divider network. Maximum output current is 500mA, while output accuracy is specified at up to ±0.85% across line, load, and temperature.
Typical quiescent current is only 17µA at light loads, making the regulator particularly useful for always-on automotive systems. Maximum current in the disabled state is 5µA, helping reduce battery drain during long standby periods.
Maximum dropout voltage is 475mV at 450mA for VOUT ≥3.3V, while TI lists approximately 370mV as a typical dropout parameter. The regulator is stable with an output capacitor of 2.2µF or greater.
The TPS7B86-Q1 architecture provides strong line-transient performance for automotive cold-crank and fast input-voltage transitions. TI specifies approximately ±2% output deviation during cold-crank and during a 1V/µs VIN slew condition, while the architecture also minimizes overshoot when recovering from dropout.
Protection and control functions include an active-high enable input, undervoltage lockout, internal current limiting, and thermal shutdown. The specified current-limit range is approximately 540mA to 780mA under the defined test conditions.
A key ordering detail is that TPS7B8601QDDARQ1 does not include Power-Good. TI’s official nomenclature states that no letter between the output-voltage code and “Q” indicates the version without power-good; B and D variants provide Power-Good functionality. This distinction is important when selecting or listing the exact device.
The device is AEC-Q100 Grade 1 qualified, with an automotive ambient-temperature grade of −40°C to +125°C and junction-temperature operation from −40°C to +150°C. It is also classified by TI as Functional Safety-Capable.
The exact TPS7B8601QDDARQ1 uses an 8-pin HSOIC / SO PowerPAD DDA package measuring approximately 4.9mm × 6.0mm. It is supplied on large tape and reel with 2,500 devices per reel, carries an MSL 2 rating, and is RoHS compliant. TI currently lists the exact orderable device as Active / Production.
Key Specifications
- Manufacturer: Texas Instruments
- Manufacturer Part Number: TPS7B8601QDDARQ1
- Product Family: TPS7B86-Q1
- Device Type: Low-Dropout Linear Regulator
- Grade: Automotive
- Qualification: AEC-Q100 Grade 1
- Output Type: Adjustable
- Output Code: 01
- Input Voltage Range: 3V to 40V
- Absolute Maximum Input: 42V
- Output Voltage Range: 1.2V to 18V
- Maximum Output Current: 500mA
- Maximum Output Accuracy: ±0.85%
- Typical Dropout Voltage: Approximately 370mV
- Maximum Dropout Voltage: 475mV at 450mA
- Typical Quiescent Current: 17µA
- Maximum Disabled Current: 5µA
- Minimum Output Capacitance: 2.2µF
- Enable: Yes
- Power-Good: No on this exact Q version
- UVLO: Yes
- Current Limit: Yes
- Current-Limit Range: 540mA to 780mA
- Thermal Shutdown: Yes
- Functional Safety-Capable: Yes
- AEC-Q100 Ambient Grade: −40°C to +125°C
- Junction Temperature Range: −40°C to +150°C
- Package: HSOIC-8 / SO PowerPAD
- TI Package Code: DDA
- Pin Count: 8
- Package Size: Approximately 4.9 × 6.0mm
- Exposed Thermal Pad: Yes
- RθJA: Approximately 41.8°C/W
- Mounting Type: Surface Mount
- Packaging: Large Tape and Reel
- Standard Reel Quantity: 2,500
- MSL Rating: Level 2
- Peak Reflow Temperature: 260°C
- RoHS: Compliant
- Product Status: Active / Production
Typical Applications
Suitable for automotive instrument clusters, body-control modules, automotive gateways, remote keyless-entry systems, always-on MCU supplies, CAN-transceiver standby power, automotive sensors, and other battery-connected systems requiring a 40V-capable, low-IQ regulator.
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