Texas Instruments TPS7B92033DBVR

Overview

TPS7B92033DBVR from Texas Instruments is a 300mA, 40V-input, ultra-low-quiescent-current (1.8μA) LDO linear regulator in a 5-pin SOT-23 (DBV) package. It delivers stable 3.3V output across –40°C to +125°C, supports ≥1.0μF ceramic output capacitors, and achieves 70dB PSRR at 1kHz - enabling reliable power for always-on battery systems and automotive body electronics.

For engineers reviewing the TPS7B92033DBVR datasheet, TPS7B92033DBVR pinout, TPS7B92033DBVR application, or TPS7B92033DBVR equivalent, key selection criteria include dropout voltage at 150mA (typically 900mV), thermal shutdown threshold (160°C), foldback current limiting, soft-start behavior, and compatibility with wide VIN (2.5V–40V) and VOUT = 3.3V configurations.

Technical Context

The TPS7B92033DBVR implements a CMOS pass transistor architecture with leakage-null control circuitry to maintain output accuracy under high-temperature, low-load, and high-headroom conditions. Its functional block includes bandgap reference, error amplifier, soft-start timer, foldback current limit, and thermal shutdown comparator.

It operates in two distinct modes: normal regulation (VIN ≥ VOUT + VDO) and dropout (VIN < VOUT + VDO), where VDO scales with load current - e.g., 700mV typical at 50mA, 1.8V typical at 150mA. UVLO activates below 1.72V (rising) to prevent unstable startup.

Key Specifications

Pinout & Package

TPS7B92033DBVR uses a 5-pin SOT-23 (DBV) package measuring 2.9mm × 2.8mm, optimized for space-constrained automotive and industrial PCBs. Thermal performance is enhanced when NC pins are tied to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7B92033DBVR, the TPS7B8733QKVURQ1 adds automotive qualification and system monitoring but increases cost and complexity, while the MCP1703T-3302E/MB offers lower cost at the expense of input voltage range, protection features, and thermal robustness - making TPS7B92033DBVR optimal for unqualified 40V industrial and extended-temperature embedded systems.

Availability

TPS7B92033DBVR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart building controllers, and medical auxiliary power rails requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS7B92033DBVR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TPS7B92 product line targets high-reliability, wide-input-voltage LDO regulation for battery-powered and always-on systems - specifically engineered for automotive body electronics, industrial IoT sensors, and medical auxiliary rails where ultra-low IQ and 40V tolerance are critical.

FAQ

What is the maximum input voltage rating for the TPS7B92033DBVR?

The TPS7B92033DBVR has an absolute maximum input voltage rating of 42V, with recommended continuous operation up to 40V. This 40V rating enables direct connection to 24V industrial buses and 36V automotive batteries, including tolerance for load-dump transients. Exceeding 42V risks permanent damage per Absolute Maximum Ratings.

Does the TPS7B92033DBVR require an external output capacitor, and what value is recommended?

Yes, the TPS7B92033DBVR requires an external output capacitor for stability. It is stable with ceramic capacitors ranging from 1.0μF to 47μF - 1.0μF is the minimum effective capacitance (derated 50% from nominal). A 2.2μF X7R ceramic placed within 5mm of the OUT and GND pins is recommended for optimal transient response and PSRR performance.

What is the dropout voltage of the TPS7B92033DBVR at 150mA output current?

The TPS7B92033DBVR has a typical dropout voltage of 900mV at 150mA output current and 25°C. At full 300mA load, dropout rises to 2.175V (typical), meaning VIN must be ≥5.475V to sustain 3.3V output. Dropout increases with temperature and decreases slightly at lighter loads - e.g., 700mV typical at 50mA.

How does the foldback current limiting function in the TPS7B92033DBVR during a short-circuit event?

During a short-circuit, the TPS7B92033DBVR transitions from brick-wall current limiting (320–740mA) to foldback mode when VOUT falls below 1.65V (50% of 3.3V). In foldback, output current reduces to ~75–290mA (short-circuit current limit), lowering power dissipation and preventing thermal runaway. If junction temperature reaches 160°C, thermal shutdown activates, cycling the device until fault removal.

Is the TPS7B92033DBVR qualified for automotive applications?

No, the TPS7B92033DBVR is not AEC-Q100 qualified. It is rated for industrial temperature range (–40°C to +125°C) and intended for non-safety-critical automotive body electronics (e.g., lighting, comfort systems) where qualification is not mandated. For ASIL-compliant designs, TI recommends the pin-compatible TPS7B8733QKVURQ1, which carries AEC-Q100 Grade 1 qualification and integrated diagnostics.