Texas Instruments TPS7A05285PDBVR

Overview

TPS7A05285PDBVR from Texas Instruments is a 2.85-V fixed-output, ultralow-quiescent-current (1 µA typ) low-dropout regulator capable of delivering 200 mA with 235 mV max dropout at full load and ±3% output accuracy over –40°C to +125°C. It operates from 1.4 V to 5.5 V input and features active output discharge, foldback current limiting, and stability with ≥0.47-µF ceramic output capacitance - ideal for battery-powered wearables and always-on subsystems.

For engineers reviewing the TPS7A05285PDBVR datasheet, TPS7A05285PDBVR pinout, TPS7A05285PDBVR application, or TPS7A05285PDBVR equivalent, key selection criteria include its 1-µA IQ performance at light load, 2.85-V precision output, X2SON-4 (1.0 mm × 1.0 mm) package footprint, and compatibility with Li-ion, Li-primary, and multi-cell alkaline batteries in space-constrained portable designs.

Technical Context

The TPS7A05285PDBVR employs a PMOS pass transistor architecture enabling ultra-low quiescent current and near-zero dropout behavior at microamp loads. Its internal reference and error amplifier maintain regulation across wide input voltage (1.4–5.5 V) and temperature (–40°C to +125°C) ranges while supporting fast transient response via optimized loop compensation.

It integrates an enable pin (EN) with logic-level thresholds (VEN(HI) = 0.9 V, VEN(LO) = 0.4 V), thermal shutdown (160°C trip), UVLO (1.3 V threshold with 40-mV hysteresis), and an active pulldown circuit for controlled output discharge during disable - all implemented in a monolithic CMOS process suitable for high-reliability embedded power rails.

Key Specifications

Pinout & Package

TPS7A05285PDBVR is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with wettable flanks and exposed thermal pad. The package supports automated optical inspection (AOI) and offers low thermal resistance (RθJA = 144.1°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A05285PDBVR, the YKAR variant delivers identical regulation performance in a smaller package at the cost of more demanding assembly, while the MCP1700 trades ultra-low dropout and IQ for broader vendor availability and simpler packaging - making PDBVR optimal for next-gen compact, long-life battery systems.

Availability

TPS7A05285PDBVR is available at Aetrix Electronics and suitable for wearable electronics, always-on power supplies, and portable medical diagnostics requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TPS7A05285PDBVR 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 expertise and automotive-grade reliability validation.

The TPS7A05 product line targets ultra-low-power, space-constrained applications such as wearables, IoT edge nodes, and portable medical devices - emphasizing nanoscale packaging, sub-µA quiescent operation, and robust thermal performance.

FAQ

What is the maximum dropout voltage of the TPS7A05285PDBVR at 200 mA output current?

The TPS7A05285PDBVR has a maximum dropout voltage of 222 mV at 200 mA output current when operating at VOUT = 2.85 V and TJ = –40°C to +85°C in the DBZ package configuration. This value is confirmed in Section 6.5 of the SBVS254D datasheet under Dropout Voltage specifications and reflects worst-case performance across temperature and process variation.

Does the TPS7A05285PDBVR require an external pull-up resistor on the EN pin?

No, the TPS7A05285PDBVR does not require an external pull-up resistor on the EN pin. When enable functionality is not needed, the EN pin must be directly connected to the IN supply rail per datasheet guidance. Its input leakage is only 10 nA at VIN = 5.5 V, ensuring reliable high-state assertion without external components.

Can the TPS7A05285PDBVR operate with a 0.47-µF output capacitor?

Yes, the TPS7A05285PDBVR is explicitly characterized and guaranteed stable with a minimum 0.47-µF ceramic output capacitor (X5R/X7R dielectric), as stated in Section 6.3 Recommended Operating Conditions and Section 8.2 Typical Application. Larger values improve transient response but are not required for stability.

What is the thermal shutdown threshold for the TPS7A05285PDBVR?

The TPS7A05285PDBVR activates thermal shutdown at a junction temperature of 160°C and resets at 140°C, providing 20°C hysteresis. This behavior is specified in Section 6.5 Electrical Characteristics under Thermal Shutdown Temperature and ensures safe recovery after transient overload conditions without latch-up.

Is the TPS7A05285PDBVR compatible with lithium thionyl chloride (Li-SOCl₂) primary batteries?

Yes, the TPS7A05285PDBVR is compatible with Li-SOCl₂ primary batteries. Its 1.4-V minimum input voltage and 1-µA quiescent current align with the high open-circuit voltage (~3.6 V) and ultra-low self-discharge characteristics of Li-SOCl₂ cells, enabling decade-long operation in metering and asset-tracking applications.