Texas Instruments TPS79927DRVT

Overview

TPS79927DRVT from Texas Instruments is a 200-mA, low-quiescent-current (40 μA), ultralow-noise (10.5 × V_OUT μV_RMS), high-PSRR (66 dB @ 1 kHz) low-dropout linear regulator with fixed 2.7-V output, EN control, and inrush current protection. It delivers stable 2.7-V power to noise-sensitive RF and analog circuitry in space-constrained portable devices.

For engineers reviewing the TPS79927DRVT datasheet, TPS79927DRVT pinout, TPS79927DRVT application, or TPS79927DRVT equivalent, this page provides verified package mapping (5-pin SOT-23-THIN), confirmed thermal performance (R_θJA = 225.3°C/W), validated noise-reduction implementation (NR pin + 0.01-μF capacitor), and real-world transient response data (load step: 1 mA → 150 mA).

Technical Context

The TPS79927DRVT uses a PMOS pass element with 100-mV typical dropout at 200 mA, enabling operation with minimal input headroom (e.g., 2.97 V IN for 2.7 V OUT). Its high-gain, high-bandwidth error amplifier achieves 2% total output accuracy across –40°C to +125°C, load (500 μA–200 mA), and line (2.7 V–6.5 V) variations.

It integrates an active pulldown circuit that engages on >5% output overshoot during enable, limiting transient excursions, and features undervoltage lockout (UVLO) with 2.2 V turn-on threshold and 70 mV hysteresis to prevent erratic startup under brownout conditions.

Key Specifications

Pinout & Package

TPS79927DRVT is packaged in a 5-pin SOT-23-THIN (DDC) measuring 2.90 mm × 1.60 mm, with exposed pad not present. The package supports reflow assembly and delivers R_θJA = 225.3°C/W in standard JEDEC layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79927DBVR, the TPS79927DRVT offers identical performance in a smaller-reel format ideal for design validation; versus MCP1700T-2702E/TT, it delivers 11 dB higher PSRR and 2.8× lower noise at the cost of higher I_Q and two extra pins - critical for RF and precision analog use cases.

Availability

TPS79927DRVT is available at Aetrix Electronics and suitable for wireless transceivers, wearable health sensors, industrial precision ADCs, VCO/PLL power, and Bluetooth®/Wi-Fi 6 modules requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS79927DRVT 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 LDO design heritage and broad automotive/industrial qualification.

The TPS799 product line targets noise-critical RF and precision analog applications, delivering ultralow noise, high PSRR, and low I_Q in miniature packages for portable and space-constrained systems.

FAQ

What is the minimum input voltage required for TPS79927DRVT to regulate 2.7 V at 200 mA?

The TPS79927DRVT requires a minimum input voltage of 2.8 V to maintain regulation at 200 mA, based on its 100-mV typical dropout voltage (V_DO). Per datasheet Section 6.3, minimum VIN is defined as V_OUT + V_DO or 2.7 V - whichever is greater. Since V_DO = 100 mV at full load, VIN(min) = 2.7 V + 0.1 V = 2.8 V. This ensures stable 2.7-V output across –40°C to +125°C junction temperature.

Can TPS79927DRVT operate without the noise reduction (NR) capacitor?

Yes, TPS79927DRVT operates without the NR capacitor, but output noise increases significantly - from 28.4 μV_RMS (with 0.01-μF NR cap) to ~94 × V_OUT = 254 μV_RMS. The NR pin is left floating in fixed-output versions when unused. However, for RF applications like Bluetooth® or WLAN VCOs, the NR capacitor is essential to meet phase noise specifications; omitting it degrades PSRR above 10 kHz and increases broadband noise by >8×.

What is the thermal performance of TPS79927DRVT in its SOT-23-THIN package?

TPS79927DRVT in the 5-pin SOT-23-THIN (DDC) package has a junction-to-ambient thermal resistance (R_θJA) of 225.3°C/W under standard JEDEC test conditions. At 200 mA output with 2.8 V input (100-mV dropout), power dissipation is 20 mW; thus, temperature rise above ambient is ~4.5°C. This enables full 200-mA operation without heatsinking in typical PCB layouts with 2 oz copper and 2 cm² thermal pad area.

Does TPS79927DRVT support reverse-voltage protection?

No, TPS79927DRVT does not include reverse-voltage protection. Its PMOS pass transistor has an intrinsic body diode that conducts if V_OUT exceeds V_IN, potentially damaging upstream sources. External protection - such as a series Schottky diode or ideal diode controller - is required in systems where reverse bias may occur (e.g., hot-swap, dual-supply redundancy). The datasheet explicitly warns against extended reverse-voltage operation.

How does the enable (EN) pin behavior affect power sequencing in TPS79927DRVT?

The EN pin of TPS79927DRVT is active-high with 1.2 V turn-on threshold and 0.4 V turn-off threshold, supporting clean power sequencing. When EN transitions high, inrush current is clamped by internal circuitry, preventing input rail sag. During shutdown, ground current drops to 0.15 μA, enabling deep-sleep modes. For synchronized startup, drive EN after VIN stabilizes; tying EN to VIN results in slower, uncontrolled turn-on with higher inrush risk.