Texas Instruments TPS7250QDR

Overview

TPS7250QDR from Texas Instruments is a 5-V fixed-output micropower low-dropout (LDO) voltage regulator in an 8-pin SOIC (D) package with PMOS pass element, 85 mV max dropout at 100 mA, ±2% output tolerance over line/load/temperature, and power-good (PG) status output. It delivers up to 250 mA with 180 µA typical quiescent current and supports battery-powered portable systems requiring stable low-voltage rail generation.

For engineers reviewing the TPS7250QDR datasheet, TPS7250QDR pinout, TPS7250QDR application, or TPS7250QDR equivalent, key selection criteria include its 5-V fixed output, ultra-low sleep-state current (0.5 µA max), EN-controlled shutdown, PG reporting for power sequencing, and compatibility with small ceramic output capacitors (≥4.7 µF).

Technical Context

The TPS7250QDR uses a PMOS pass transistor architecture-replacing conventional PNP elements-to achieve dropout voltage directly proportional to load current (e.g., 76–85 mV at 100 mA). Its internal reference is trimmed to 1.188 V, enabling precise 5-V regulation via feedback through the SENSE pin tied to OUT.

It integrates logic-enabled sleep mode (EN pin active-low), power-good monitoring with 50-mV hysteresis and 0.95×VO trip threshold, and thermal shutdown at 165°C. The device operates across –40°C to +125°C junction temperature with input voltage range 5.41–10 V and requires no external compensation beyond standard input/output capacitance.

Key Specifications

Pinout & Package

TPS7250QDR is housed in an 8-pin SOIC (D) package per JEDEC MS-012AC, with 1.27 mm pitch and exposed pad not present. Pin assignments are validated per Figure 1 (top view) in SLVS102G.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7250QD and MCP1700T-5002E/MB, the TPS7250QDR uniquely combines tape-and-reel manufacturability, integrated PG signaling, and sub-100 mV dropout in a standard SOIC footprint - making it optimal for volume production of battery-sensitive systems requiring robust power monitoring.

Availability

TPS7250QDR is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, laptop subsystem rails, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for TPS7250QDR 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 TPS72xx family was designed specifically for micropower, low-dropout regulation in space-constrained portable systems - emphasizing battery longevity, thermal efficiency, and integration of power-monitoring features like PG and EN.

FAQ

What is the minimum input voltage required for stable 5-V output from the TPS7250QDR?

The TPS7250QDR requires a minimum input voltage of 5.41 V at maximum 250 mA load to maintain regulation, based on its 206 mV max dropout at that condition. At lighter loads (e.g., 100 mA), 5.08 V suffices due to lower dropout (85 mV). Input must remain ≥5.41 V across all operating temperatures and line conditions to guarantee ±2% output accuracy.

How does the SENSE pin function on the TPS7250QDR, and must it be used?

The SENSE pin on the TPS7250QDR is mandatory for accurate 5-V regulation and must be externally tied to the OUT pin as close as possible to the device package. It provides Kelvin sensing to compensate for PCB trace IR drop, ensuring load-side voltage remains within ±2% tolerance. Leaving SENSE unconnected or routing it separately invalidates output accuracy specifications.

Can the TPS7250QDR be used with ceramic output capacitors, and what value is recommended?

Yes, the TPS7250QDR is fully stable with ceramic output capacitors. Texas Instruments specifies a minimum of 4.7 µF with ≤1 Ω effective series resistance (ESR), such as X5R or X7R dielectrics in 0805 or larger case sizes. Larger values (e.g., 10 µF) further reduce output noise (300 µVrms vs. 175 µVrms at 100 µF) and improve transient response.

What is the purpose of the dual IN and OUT pins on the TPS7250QDR?

The dual IN and OUT pins on the TPS7250QDR reduce conduction losses and thermal resistance by splitting current paths - each pin carries ~50% of total load current. This design lowers junction temperature rise by ~10°C at 250 mA versus single-pin equivalents and improves reliability in thermally constrained layouts. Both IN pins must be connected to the same input net; both OUT pins to the same output net.

Does the TPS7250QDR support reverse current protection, and how is it implemented?

Yes, the TPS7250QDR inherently blocks reverse current flow from OUT to IN due to its PMOS pass transistor architecture - the body diode is oriented cathode-to-IN, preventing backfeed when input is absent or lower than output. This eliminates need for external blocking diodes in battery backup or OR-ing configurations, preserving efficiency and board space.