Texas Instruments TPS7B92018DBVR

Overview

TPS7B92018DBVR 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 1.8V output across –40°C to +125°C, supports ≥1.0μF ceramic output capacitors, and achieves 70dB PSRR at 1kHz-designed for always-on battery-powered microcontroller power rails in industrial sensing nodes.

For engineers reviewing the TPS7B92018DBVR datasheet, TPS7B92018DBVR pinout, TPS7B92018DBVR application, or TPS7B92018DBVR equivalent, key selection criteria include dropout voltage at 150mA (typically 900mV), thermal shutdown threshold (160°C), foldback current limiting, leakage-null control for high-temperature accuracy, and compatibility with 0.47μF–47μF output capacitance.

Technical Context

The TPS7B92018DBVR implements a CMOS pass transistor architecture with integrated leakage-null control circuitry to maintain output accuracy under high VIN–VOUT headroom and elevated temperature (up to +125°C junction). Its functional block includes bandgap reference, ULVO detection, thermal shutdown comparator, and hybrid brick-wall/foldback current limit with VFOLDBACK = 50% × VOUT(nom).

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 at 150mA, and 3.7V at 300mA. Soft-start limits inrush current during power-up, and PSRR remains ≥43dB up to 100kHz with 1μF COUT.

Key Specifications

Pinout & Package

The TPS7B92018DBVR is housed in a 2.9mm × 2.8mm, 5-pin SOT-23 (DBV) package with exposed pad for thermal enhancement. Pins 3 and 4 are NC (not internally connected); tying them to GND improves thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7B8118QDCYRQ1 and NCP1117ST18T3G, the TPS7B92018DBVR uniquely balances ultra-low IQ (1.8μA), wide 40V input, and high-accuracy regulation across automotive temperature range-making it optimal for space-constrained, long-life industrial and medical edge devices where efficiency and reliability are co-prioritized.

Availability

TPS7B92018DBVR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, and automotive body control units requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for TPS7B92018DBVR 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TPS7B92 product line targets ultra-low-power, high-voltage LDO regulation for battery-backed and always-on systems-emphasizing longevity, thermal robustness, and precision under wide input/output conditions.

FAQ

What is the maximum input voltage rating for the TPS7B92018DBVR?

The TPS7B92018DBVR has an absolute maximum input voltage of 42V, with recommended continuous operation up to 40V. Exceeding 42V risks permanent damage. The device maintains regulation across its full 2.5V–40V input range, making it suitable for 24V industrial buses and automotive battery systems with load-dump transients.

Does the TPS7B92018DBVR require an external capacitor on the IN pin?

The TPS7B92018DBVR does not require an input capacitor for stability, but Texas Instruments recommends ≥0.47μF ceramic capacitance at the IN pin to suppress source impedance-induced ringing during load transients. This improves system-level immunity without affecting LDO loop stability, which depends solely on the 1.0μF–47μF output capacitor.

How does the leakage-null control circuit improve performance in the TPS7B92018DBVR?

The leakage-null control circuit in the TPS7B92018DBVR actively detects and shunts pass-transistor leakage current at high temperatures and high VIN–VOUT differentials. This preserves output voltage accuracy-limiting total error to ±4.5% across –40°C to +125°C-where conventional LDOs typically degrade by >10% under identical conditions.

What is the typical dropout voltage of the TPS7B92018DBVR at 150mA load?

The TPS7B92018DBVR exhibits a typical dropout voltage of 900mV at 150mA load and 25°C. At full 300mA load, dropout rises to 2.175V (typical). Dropout increases with temperature and load; Figure 5-17 confirms 2.5V at 150mA and +125°C. Designers must ensure VIN ≥ VOUT + VDO under worst-case conditions.

Can the TPS7B92018DBVR be used with a 0.47μF output capacitor?

Yes-the TPS7B92018DBVR is stable with output capacitors as low as 0.47μF, though the datasheet specifies ≥1.0μF for guaranteed performance across temperature and process variation. Using 0.47μF may reduce PSRR margin at high frequencies and slightly increase output noise; 1.0μF–10μF is the recommended range for optimal transient response and noise suppression.