Texas Instruments TPS7A0515PDBVT

Overview

TPS7A0515PDBVT from Texas Instruments is a 1.5-V fixed-output, ultralow-quiescent-current (1 µA typ) low-dropout regulator in a 5-pin SOT-23 package, delivering up to 200 mA with 235 mV max dropout at full load and ±1% output accuracy over temperature - deployed in wearable electronics and always-on battery-powered subsystems.

For engineers reviewing the TPS7A0515PDBVT datasheet, TPS7A0515PDBVT pinout, TPS7A0515PDBVT application, or TPS7A0515PDBVT equivalent, key selection criteria include quiescent current under light load, dropout voltage at 200 mA, thermal performance in SOT-23, active output discharge capability, and compatibility with 0.47-µF ceramic output capacitors.

Technical Context

The TPS7A0515PDBVT employs a PMOS pass transistor architecture enabling near-zero dropout behavior at low currents and stable regulation down to 1.4 V input. Its internal reference and error amplifier maintain tight output accuracy across –40°C to +125°C junction temperature.

It integrates an enable pin with logic-level thresholds (VEN(HI) = 0.9 V, VEN(LO) = 0.4 V), active pulldown circuitry for rapid output discharge on disable, and foldback current limiting for short-circuit protection - all while consuming only 1 µA typical ground current at no load.

Key Specifications

Pinout & Package

TPS7A0515PDBVT uses the DBV (5-pin SOT-23) package: 2.90 mm × 1.60 mm body, 0.95 mm height, surface-mount with gull-wing leads. Thermal resistance R_θJA = 185.6°C/W enables >150 mA continuous operation at +85°C ambient with minimal copper pour.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0515PDBVT, the PDQNR offers superior thermal efficiency in ultra-compact layouts, while the MCP1700 trades enable functionality and low dropout for lower unit cost - making TPS7A0515PDBVT optimal for battery longevity and system-level power sequencing.

Availability

TPS7A0515PDBVT is available at Aetrix Electronics and suitable for wearable electronics, always-on sensor nodes, and wireless remote controls requiring stable component supply with guaranteed long-term manufacturability and lifecycle support.

Supply support for TPS7A0515PDBVT 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies for industrial, automotive, and consumer markets.

The TPS7A05 product line delivers ultralow-IQ LDOs optimized for battery-powered edge devices - designed to maximize runtime in applications where microamp-level standby current and small form factor are mandatory.

FAQ

What is the maximum output current capability of the TPS7A0515PDBVT?

The TPS7A0515PDBVT is rated for a maximum continuous output current of 200 mA under recommended operating conditions (T_J ≤ +125°C, adequate PCB copper). Its foldback current limit activates at 210–700 mA depending on temperature and input conditions, protecting the device during overload or short-circuit events. Actual usable current depends on thermal design and input-to-output voltage differential.

Does the TPS7A0515PDBVT require an external pull-up resistor on the EN pin?

No, the TPS7A0515PDBVT does not require an external pull-up on the EN pin. When enable functionality is not needed, the EN pin must be directly connected to IN per the datasheet. The internal EN threshold is defined as V_EN(HI) = 0.9 V (min) and V_EN(LO) = 0.4 V (max), allowing direct interfacing with 1.8-V or higher GPIOs without external components.

Can the TPS7A0515PDBVT operate from a single 1.5-V alkaline cell?

No - the TPS7A0515PDBVT requires a minimum input voltage of 1.4 V, but its dropout voltage at 1.5 V output is 235 mV (max) at 200 mA. A fresh 1.5-V alkaline cell starts at ~1.6 V and drops rapidly under load; operation below ~1.75 V risks dropout and regulation loss. It is suitable for two-cell alkaline (2.0–3.2 V) or Li-MnO₂ (2.8–3.6 V) sources.

What is the purpose of the NC pin on the TPS7A0515PDBVT (DBV package)?

The NC (no-connect) pin on the TPS7A0515PDBVT's 5-pin SOT-23 (DBV) package is internally unconnected and serves no electrical function. It may be left floating or tied to GND for mechanical reinforcement during assembly - TI confirms it has no impact on regulation, thermal performance, or reliability. Do not route signals or power to this pin.

How does the active output discharge feature work in the TPS7A0515PDBVT?

When the EN pin is driven low (<0.4 V), the TPS7A0515PDBVT activates an internal 120-Ω pulldown resistor between OUT and GND, discharging external output capacitance rapidly. This prevents floating or slowly decaying output voltages that could cause latch-up or undefined states in downstream logic - critical for clean power sequencing in multi-rail systems.