Texas Instruments TPS72216DBVT

Overview

TPS72216DBVT from Texas Instruments is a 1.6-V fixed-output, 50-mA low-dropout linear regulator in a 5-pin SOT-23 (DBV) package. It operates from 1.8 V to 5.5 V input, delivers 50 mV typical dropout at full load, supports 0.1-µF ceramic output capacitance, and features <1 µA shutdown current. It powers microcontroller core rails in dual-supply battery systems using two AAA cells.

For engineers reviewing the TPS72216DBVT datasheet, TPS72216DBVT pinout, TPS72216DBVT application, or TPS72216DBVT equivalent, key selection criteria include ultra-low input voltage support (1.8 V min), minimal external capacitance requirement (0.1 µF), thermal/overcurrent protection, and compatibility with portable, space-constrained, battery-powered designs requiring stable 1.6-V regulation.

Technical Context

The TPS72216DBVT uses a PMOS pass element enabling operation down to 1.8 V input-well below conventional LDO limits-making it suitable for direct two-AAA-battery operation. Its internal compensation eliminates need for ≥1-µF output capacitors, stabilizing across 0–50 mA load and 1.8–5.5 V input range.

Enable (EN) logic control allows system-level power sequencing; a low EN signal disables output and reduces ground current to <1 µA. Integrated thermal shutdown (170°C trip, 20°C hysteresis) and current limiting (~350 mA) protect against fault conditions without external circuitry.

Key Specifications

Pinout & Package

TPS72216DBVT is housed in a 5-pin SOT-23 (DBV) package measuring 3.0 mm × 3.0 mm × 1.45 mm max height, optimized for high-density portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS72215DBVT and TPS72218DBVT, the TPS72216DBVT provides a mid-range 1.6-V output ideal for newer ultra-low-voltage microcontrollers that balance power efficiency and noise immunity - offering identical footprint, thermal performance, and enable functionality while targeting a distinct voltage node.

Availability

TPS72216DBVT is available at Aetrix Electronics and suitable for portable communication devices, battery-powered medical instruments, and PCMCIA peripheral designs requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for TPS72216DBVT 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer applications.

The TPS722xx family was engineered specifically for space-constrained, battery-operated systems needing ultra-low-input-voltage LDOs with minimal external components - targeting portable computing, communications, and handheld instrumentation.

FAQ

What is the minimum input voltage required for stable operation of the TPS72216DBVT?

The TPS72216DBVT requires a minimum input voltage of 1.65 V to maintain regulation at full 50-mA load (1.6 V + 50 mV dropout). However, its absolute minimum specified operating input is 1.8 V per datasheet - this accounts for line/load regulation, temperature drift, and margin. Below 1.8 V, output may deviate from specification even if dropout condition appears met.

Can the TPS72216DBVT be used with a 0.1-µF output capacitor only, or is additional capacitance recommended?

Yes, the TPS72216DBVT is fully stable with only a 0.1-µF ceramic capacitor on the OUT pin - this is its minimum specified value and sufficient for most applications. Larger capacitors (e.g., 1–4.7 µF) improve transient response and PSRR but are not required for stability. The 0.1-µF value enables ultra-compact designs where board space is critical.

Is the NC/FB pin on the TPS72216DBVT required to be connected or left floating?

The NC/FB pin (Pin 4) on the TPS72216DBVT must be left unconnected and floating - it is not internally bonded and has no electrical function. Connecting it to GND, V_OUT, or any other node may cause unpredictable behavior or damage. This differs from the adjustable TPS72201, where Pin 4 serves as FB.

Does the TPS72216DBVT support reverse current protection, and how does it behave during input collapse?

Yes, the TPS72216DBVT incorporates a PMOS pass element with an intrinsic back diode that safely conducts reverse current from OUT to IN when input voltage falls below output voltage (e.g., during power-down). This prevents output bus collapse but does not limit reverse current - external series FETs or diodes are needed if reverse current must be blocked.

What is the thermal shutdown behavior of the TPS72216DBVT, and does it auto-recover?

The TPS72216DBVT activates thermal shutdown at 170°C junction temperature and remains off until junction temperature cools to approximately 150°C (20°C hysteresis). Recovery is fully automatic - no reset signal or power cycle is required. Once cooled, regulation resumes immediately, provided input voltage and enable conditions remain valid.