Texas Instruments TPS7248QDR

Overview

TPS7248QDR from Texas Instruments is a micropower low-dropout (LDO) voltage regulator delivering a fixed 4.85 V output with ±2% tolerance over line, load, and temperature. It features a PMOS pass element enabling 90–100 mV max dropout at 100 mA, 180 µA typical quiescent current independent of load, and a logic-enabled sleep mode reducing current to 0.5 µA max. Designed for portable systems like cellular handsets and battery-powered instrumentation, it supports stable regulation under light-to-moderate loads up to 250 mA.

For engineers reviewing the TPS7248QDR datasheet, TPS7248QDR pinout, TPS7248QDR application, or TPS7248QDR equivalent, key selection criteria include its 4.85 V fixed output, 90–100 mV dropout at 100 mA, 8-pin SOIC (D) package with exposed pad variant, power-good (PG) status reporting, and EN-controlled shutdown capability - all critical for space-constrained, battery-sensitive designs requiring precise rail integrity.

Technical Context

The TPS7248QDR uses a PMOS pass transistor architecture instead of conventional PNP, resulting in dropout voltage directly proportional to load current and eliminating load-dependent quiescent current variation. Its internal 1.188 V reference feeds an error amplifier that regulates SENSE (tied to OUT in fixed versions) against feedback, enabling tight output accuracy.

It integrates a dedicated power-good (PG) comparator monitoring regulated output voltage with 0.95×VO(nom) trip threshold and 50 mV hysteresis, plus an enable input with 0.5 V logic-low threshold and 50 mV hysteresis to ensure clean state transitions during power sequencing.

Key Specifications

Pinout & Package

TPS7248QDR is packaged in an 8-pin SOIC (D) package with gull-wing leads and no thermal pad. Pin assignments are validated per TI SLVS102G datasheet Figure 1 (D/P/PW top view).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7248QDR, TPS76348QDBVR offers lower quiescent current but cannot support 250 mA loads with equivalent dropout performance, while MCP1703T-4802E/MB trades 4.85 V precision and 100 mV dropout for nanoscale IQ - making TPS7248QDR optimal for balanced battery-life, accuracy, and load-capability requirements.

Availability

TPS7248QDR is available at Aetrix Electronics and suitable for cellular handset power management, industrial sensor node regulation, portable medical instrumentation, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS7248QDR 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and portable applications.

The TPS72xx family was designed specifically for micropower, low-dropout regulation in space-constrained, battery-operated systems - emphasizing minimal IQ, precise fixed outputs, and integrated power-good signaling without external components.

FAQ

What is the minimum input voltage required for TPS7248QDR to maintain regulation at full 250 mA load?

The minimum input voltage for TPS7248QDR at 250 mA is 4.75 V + 250 mV = 5.0 V (per datasheet Figure 1 and electrical characteristics table). However, the recommended operating condition specifies 5.24 V minimum to guarantee 4.75–4.95 V output tolerance across temperature and line variations. Below 5.24 V, regulation remains functional but output accuracy degrades beyond ±2%.

Does TPS7248QDR require external compensation components for stability?

No, TPS7248QDR is internally compensated and stable with a minimum 4.7 µF ceramic output capacitor (X5R/X7R) having ≤1 Ω total series resistance (CSR). The datasheet explicitly states no external compensation is needed, and Figure 2 shows a standard configuration using only CO and optional input bypass - simplifying layout and reducing BOM count.

How does the SENSE pin function on TPS7248QDR, and must it be used?

On TPS7248QDR, the SENSE pin is internally connected to the error amplifier's feedback node and must be tied directly to the OUT pin (Pins 5 and 6) as close as possible to the device. This configuration enables accurate local regulation. Remote sensing is not supported in fixed-output variants - SENSE is not a separate feedback input like in adjustable regulators (e.g., TPS7201Q).

Can TPS7248QDR be used in parallel to increase output current capacity?

No, TPS7248QDR is not designed for parallel operation. Its PMOS pass element lacks inherent current-sharing capability, and the datasheet contains no guidance or characterization for paralleling. Attempting parallel use risks thermal imbalance, oscillation, or premature failure. For >250 mA, select a higher-current LDO or switcher solution.

What is the purpose of the dual IN and dual OUT pins on TPS7248QDR?

The dual IN (Pins 1 & 2) and dual OUT (Pins 5 & 6) pins reduce effective leadframe resistance and improve thermal dissipation by distributing current across two parallel paths. This lowers voltage drop and junction temperature rise - especially beneficial at 250 mA load in the SOIC package. Both IN pins must be connected to the same input net; both OUT pins must be shorted together externally.