Texas Instruments TPS7201QD

Overview

TPS7201QD from Texas Instruments is an adjustable micropower low-dropout (LDO) voltage regulator featuring a 1.188 V internal reference, PMOS pass element, 180 µA typical quiescent current independent of load, power-good (PG) output, and enable (EN) control. It delivers up to 250 mA with dropout as low as 76 mV at 100 mA (calculated via r_DS(on) × I_O) and supports output programming from 1.2 V to 9.75 V using external resistors - ideal for battery-powered portable systems requiring stable, low-noise biasing of analog or mixed-signal circuitry.

For engineers reviewing the TPS7201QD datasheet, TPS7201QD pinout, TPS7201QD application, or TPS7201QD equivalent, key selection criteria include its adjustable output architecture, 0.5 µA max sleep-state current, ±2% output tolerance over line/load/temperature (±3% for adjustable), PG reporting threshold at 0.95×V_FB, and SOIC-8 package compatibility with space-constrained PCB layouts.

Technical Context

The TPS7201QD employs a PMOS pass transistor replacing conventional PNP elements, enabling dropout voltage directly proportional to load current (V_DO = I_O × r_DS(on)). Its feedback (FB) pin connects to an internal 1.188 V reference, allowing precise external resistor-divider programming of output voltage across 1.2 V–9.75 V.

It integrates logic-controlled enable (EN) with hysteresis (50 mV), a dedicated open-drain power-good (PG) output that asserts low when V_OUT drops below 0.95×V_FB, and thermal shutdown at 165°C. Quiescent current remains stable from 0 to 250 mA load, and sleep-mode current is limited to 0.5 µA max at T_J = 25°C.

Key Specifications

Pinout & Package

TPS7201QD is housed in an 8-pin SOIC (D) package with standard 1.27 mm pitch, compatible with automated assembly and reflow processes. Thermal resistance θ_JA = 172°C/W enables operation up to 125°C junction temperature under typical board conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV70718 and TPS7A2033, the TPS7201QD uniquely supports wide-range output adjustment (1.2–9.75 V) while maintaining micropower operation and integrated PG/EN - making it the only option among the three for designs requiring flexible rail generation with system supervision.

Availability

TPS7201QD is available at Aetrix Electronics and suitable for portable medical devices, industrial IoT edge nodes, test equipment, and automotive body control modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TPS7201QD 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 IC design.

The TPS72xx family was engineered for portable and battery-operated systems demanding micropower efficiency, ultra-low dropout, and small-footprint packaging - targeting laptops, cellular handsets, and handheld instrumentation where runtime and board area are critical.

FAQ

What output voltage range does the TPS7201QD support?

The TPS7201QD supports an output voltage range of 1.2 V to 9.75 V, set by an external resistor divider connected to the FB pin. The internal 1.188 V reference ensures accuracy, and output tolerance is specified as ±3% over line, load, and temperature for the adjustable configuration. This flexibility eliminates the need for multiple fixed-output variants in multi-rail designs.

How is dropout voltage calculated for the TPS7201QD?

Dropout voltage for the TPS7201QD is calculated as V_DO = I_O × r_DS(on), where r_DS(on) varies with input voltage and load current. For example, at V_I = 3.9 V and I_O = 100 mA, r_DS(on) = 1.0 Ω yields V_DO = 100 mV. The datasheet provides r_DS(on) values at four input voltages (2.4 V, 2.9 V, 3.9 V, 5.9 V) corresponding to common output settings - enabling accurate dropout estimation across the TPS7201QD's full operating range.

Does the TPS7201QD include power-good functionality?

Yes, the TPS7201QD includes a dedicated open-drain power-good (PG) output that asserts low when the regulated output falls below 0.95 × V_FB. It features 12 mV hysteresis and a maximum low-level voltage of 0.4 V at 400 µA sink current. This allows direct interfacing with microcontroller reset inputs or FPGA configuration logic, enabling reliable power sequencing and fault detection without external comparators.

What is the quiescent current behavior of the TPS7201QD across load conditions?

The TPS7201QD maintains a constant 180 µA typical quiescent current from 0 mA to 250 mA load - independent of output current - due to its PMOS pass element architecture. In standby mode (EN high), input current drops to 0.5 µA max at 25°C. This stable, load-independent IQ ensures predictable battery drain in portable applications, unlike bipolar-based LDOs whose ground current rises with load.

Which package options are available for the TPS7201QD?

The TPS7201QD is offered exclusively in the 8-pin SOIC (D) package, with dimensions of 4.9 mm × 3.91 mm × 1.75 mm and 1.27 mm lead pitch. It is available tape-and-reel (suffix R) for automated assembly. Unlike other members of the TPS72xx family, the QD suffix denotes this specific SOIC-8 variant - not to be confused with TSSOP (PW) or PDIP (P) versions used for fixed-output derivatives like TPS7250QPWR.