Texas Instruments TPS76301QDBVRQ1

Overview

TPS76301QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade low-dropout linear regulator delivering up to 150mA output current with ±1.5% output voltage accuracy, 175mV typical dropout at 150mA, and 65μA quiescent current at zero load. It operates across 2.7V–10V input and supports fixed 1.0V output-designed for power management in vehicle instrument clusters and traction inverters.

For engineers reviewing the TPS76301QDBVRQ1 datasheet, TPS76301QDBVRQ1 pinout, TPS76301QDBVRQ1 application, or TPS76301QDBVRQ1 equivalent, key selection criteria include its 150°C junction temperature rating, active overshoot pulldown protection, SOT-23 (DBV) 5-pin package, and compatibility with low-ESR ceramic capacitors down to 0Ω.

Technical Context

The TPS76301QDBVRQ1 implements a bandgap-referenced control loop with internal 1.2V reference and UVLO circuitry. Its architecture integrates thermal shutdown, overcurrent limiting, and active output pulldown during disable-critical for automotive fault resilience.

Unlike legacy variants, this "new chip" version features internal soft-start to limit inrush current, supports 0Ω–1Ω output capacitor ESR, and achieves tighter line regulation (0.01%/V) and lower noise (165µV_RMS) under 1kHz conditions.

Key Specifications

Pinout & Package

TPS76301QDBVRQ1 is housed in a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, with R_θJA = 178.6°C/W - optimized for compact, thermally constrained automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS76318QDBVRQ1 and TLV70710PDQNR, the TPS76301QDBVRQ1 uniquely delivers AEC-Q100 Grade 1 compliance at 1.0V with industry-leading 175mV dropout and active pulldown - making it the only qualified option for under-hood 1.0V point-of-load regulation.

Availability

TPS76301QDBVRQ1 is available at Aetrix Electronics and suitable for vehicle instrument cluster, traction inverter, and high-voltage battery system applications requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.

Supply support for TPS76301QDBVRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with deep expertise in automotive power management and functional safety design.

The TPS763-Q1 product line was engineered specifically for automotive subsystems demanding AEC-Q100 qualification, extended temperature operation, and robust transient response - targeting instrument clusters, body control modules, and electrified powertrain controls.

FAQ

What is the output voltage tolerance of the TPS76301QDBVRQ1 over temperature and load?

The TPS76301QDBVRQ1 maintains ±1.5% output voltage accuracy across –40°C to +150°C junction temperature and 0–150mA load range, verified per TI's electrical characteristics table for the "new chip" variant. This specification applies under recommended operating conditions including VIN ≥ VOUT + 1.0V and proper capacitor selection.

Does the TPS76301QDBVRQ1 require an external feedback resistor network?

No, the TPS76301QDBVRQ1 is a fixed-output 1.0V regulator with Pin 4 designated NC (no connection); it does not use an external feedback divider. The adjustable variants (e.g., TPS76333QDBVRQ1) use Pin 4 as FB, but TPS76301QDBVRQ1 internally sets the output without external resistors.

What is the minimum output capacitance required for stability with the TPS76301QDBVRQ1?

The TPS76301QDBVRQ1 requires a minimum 1µF ceramic output capacitor with ESR ≤1Ω for stable operation. The datasheet specifies nominal COUT ≥1µF (derated by 50%), meaning effective capacitance at the pin must remain >1µF across temperature and bias - typically achieved with 2.2µF X7R 0603 or larger.

How does the enable functionality work on the TPS76301QDBVRQ1?

The EN pin (Pin 3) is active-high: device enables when voltage exceeds 0.85V (min) and disables when below 0.15V (max). When disabled, an internal pulldown actively discharges the OUT pin. If unused, EN must be tied to IN - not left floating - to ensure predictable startup behavior.

Is the TPS76301QDBVRQ1 pin-compatible with earlier TPS763xx-Q1 variants?

Yes, all TPS763xx-Q1 devices share identical 5-pin SOT-23 (DBV) pinout and mechanical footprint. However, electrical differences exist: the TPS76301QDBVRQ1 uses the "new chip" silicon revision with improved dropout (175mV), lower IQ (65μA), and active pulldown - legacy variants lack these enhancements and have different ESR and accuracy specs.