Texas Instruments TPS7150QP

Overview

TPS7150QP from Texas Instruments is a 5-V fixed-output micropower low-dropout (LDO) voltage regulator featuring a maximum dropout voltage of 32 mV at 100 mA, 285 µA typical quiescent current independent of load, 0.5 µA max sleep-state current, ±2% output voltage tolerance over line/load/temperature, and integrated power-good (PG) status output. It serves as a primary post-regulation supply in battery-powered portable instrumentation requiring ultra-low quiescent current and tight voltage stability.

For engineers reviewing the TPS7150QP datasheet, TPS7150QP pinout, TPS7150QP application, or TPS7150QP equivalent, this page delivers verified electrical specifications, validated package mapping to the PDIP-8 (P package), confirmed functional role in low-power system rails, and real-world alternative selection guidance for space-constrained industrial and medical devices.

Technical Context

The TPS7150QP uses a PMOS pass element instead of a conventional PNP transistor, enabling dropout voltage directly proportional to output current (V_DO = I_O × r_DS(on)) and eliminating load-dependent quiescent current drift. Its internal 1.178-V reference feeds a precision error amplifier that controls the gate of the PMOS device to maintain regulation.

Power-good (PG) functionality monitors output voltage via an internal comparator with 4.55–4.75 V trip threshold and 53 mV hysteresis; PG asserts low when V_OUT falls below threshold and remains latched until recovery. Enable (EN) input accepts TTL-compatible logic with 2 V min high-level threshold and 0.5 V max low-level threshold across –40°C to 125°C.

Key Specifications

Pinout & Package

TPS7150QP is packaged in an 8-pin plastic DIP (PDIP-8, package code 'P'), with 0.3-inch body width and through-hole mounting. The package supports standard wave soldering and offers robust thermal performance (R_θJA = 106°C/W, R_θJC = 46°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7150QP, TPS76350QDR offers lower quiescent current but sacrifices 500-mA output capacity and PG monitoring, while LP2951ACN/NOPB provides pin-compatible SOIC packaging but requires redesign for enable polarity and lacks remote sensing-making TPS7150QP optimal for high-reliability, medium-current, battery-critical systems.

Availability

TPS7150QP is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and handheld test equipment requiring stable component supply with long-term lifecycle support and traceable sourcing.

Supply support for TPS7150QP 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, embedded processing, and connectivity technologies, with decades of expertise in power management ICs.

The TPS71xx family was designed specifically for ultra-low-power, high-precision regulation in battery-operated instrumentation, offering industry-leading dropout and quiescent current performance for extended runtime.

FAQ

What is the minimum input voltage required for stable operation of the TPS7150QP?

The minimum input voltage for TPS7150QP is 5.33 V under maximum load (500 mA), calculated as V_OUT(max) + V_DO(max) = 5.1 V + 230 mV. At lighter loads, input can be reduced-for example, 5.027 V suffices at 100 mA (5.0 V + 27 mV). This ensures compatibility with aging Li-ion cells delivering ~5.3 V nominal.

How does the SENSE pin function in the TPS7150QP, and when should it be used?

The SENSE pin in TPS7150QP enables remote voltage sensing by connecting directly to the load side of output traces. When used, it compensates for IR drop between the regulator and load, maintaining ±2% regulation at the point-of-load. It is recommended for applications with >100 mA current or >50 mm trace length where voltage drop exceeds 10 mV.

Can the TPS7150QP be used in automotive applications, and what temperature range does it support?

Yes, the TPS7150QP is qualified for operation from –40°C to 125°C virtual junction temperature, meeting extended industrial requirements. While not AEC-Q100 qualified, its thermal shutdown (165°C) and robust 125°C ambient rating make it suitable for under-hood auxiliary modules, infotainment power sequencing, and ADAS sensor sub-rails where full automotive qualification is not mandated.

What is the purpose of the dual IN and dual OUT pins on the TPS7150QP PDIP package?

The dual IN (Pins 3 & 4) and dual OUT (Pins 7 & 8) on the TPS7150QP reduce effective trace resistance and voltage drop in high-current paths. Paralleling these pins lowers conduction loss by ~30% at 500 mA, improves thermal dissipation, and enhances reliability in sustained high-load operation-critical for portable instruments with burst-mode workloads.

Does the TPS7150QP require external compensation components, and what output capacitor is recommended?

No external compensation is needed for the TPS7150QP. A minimum 10 µF tantalum or aluminum electrolytic capacitor with ≤1 Ω ESR is required at the OUT pin for stability. Ceramic capacitors may be used if ≥10 µF and series resistance (ESR + PCB trace) is ≥0.1 Ω; adding a 0.1 µF ceramic in parallel improves high-frequency PSRR.