Texas Instruments TLV75728PDBVR

Overview

TLV75728PDBVR from Texas Instruments is a 1A, low-quiescent-current (25μA typical), fixed 2.8V output LDO regulator in SOT-23-5 (DBV) package. It operates from 1.45V to 5.5V input, delivers ±1% output accuracy, supports 1µF ceramic output capacitance, and features built-in soft-start, active output discharge, and foldback current limiting - optimized for powering MCU core rails in portable and battery-powered systems.

For engineers reviewing the TLV75728PDBVR datasheet, TLV75728PDBVR pinout, TLV75728PDBVR application, or TLV75728PDBVR equivalent, key selection criteria include dropout voltage at 1A (max 425mV @ 3.3VOUT), thermal resistance (RθJA = 100.8°C/W for DBV), EN pin logic thresholds (VHI = 1V, VLO = 0.3V), and stability with minimal 1µF COUT.

Technical Context

The TLV75728PDBVR uses a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR (46dB @ 100kHz). Its internal bandgap reference and error amplifier deliver 1% output accuracy across –40°C to +125°C, while integrated UVLO (1.21–1.44V) and thermal shutdown (165°C trip) ensure robust operation under brownout and overload conditions.

Functional modes include normal regulation (VIN ≥ VOUT + VDO), dropout (VIN < VOUT + VDO, output tracks input), and disabled state (EN < VLO, active pulldown via 120Ω resistor). The device enters foldback current limit when VOUT drops below 0.4×VOUT(NOM), reducing dissipation during short-circuit events.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint, no thermal pad. Requires standard SOT-23 reflow profile; GND pin (Pin 2) serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV75728PDBVR, TLS850F0TESA1 adds functional safety features at the cost of current capability and package size, while MCP1826T-2802E/DB trades lower quiescent current and tighter dropout for reduced PSRR and higher thermal dissipation - making TLV75728PDBVR optimal for space-constrained, battery-sensitive designs needing high accuracy and fast transient response.

Availability

TLV75728PDBVR is available at Aetrix Electronics and suitable for portable medical sensors, industrial IoT edge nodes, smart home hub controllers, and automotive body control modules requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV75728PDBVR 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 and embedded processing technologies, with decades of LDO design expertise and broad automotive, industrial, and consumer qualification.

The TLV757P family was engineered to replace legacy 1A LDOs in space- and power-constrained applications, delivering ultra-low IQ, small-footprint packaging (SOT-23-5, WSON-6), and robust protection features for next-generation portable and embedded systems.

FAQ

What is the maximum input voltage rating for TLV75728PDBVR?

The absolute maximum input voltage for TLV75728PDBVR is 6.0V, but the recommended operating range is 1.45V to 5.5V. Exceeding 5.5V may trigger internal protection circuits or degrade reliability; sustained operation above 6.0V risks permanent damage per the Absolute Maximum Ratings table in the SBVS322C datasheet.

Does TLV75728PDBVR require an input capacitor?

Yes, TLV75728PDBVR requires a minimum 1µF ceramic capacitor between IN and GND. This capacitor stabilizes the input rail during load transients and reduces noise coupling into the LDO control loop. TI recommends X5R or X7R dielectrics with appropriate DC bias derating to maintain effective capacitance above 0.47µF at rated voltage.

Can TLV75728PDBVR be used without connecting the EN pin?

Yes - TLV75728PDBVR can operate without external EN control by tying EN directly to IN. In this configuration, the device powers up whenever VIN exceeds 1.45V and remains enabled until VIN falls below the UVLO threshold (~1.21V). No pull-up resistor is needed due to the internal 120Ω pulldown, but connecting EN to IN ensures deterministic startup.

What is the thermal resistance (RθJA) of TLV75728PDBVR in its SOT-23-5 package?

The junction-to-ambient thermal resistance (RθJA) for TLV75728PDBVR in the DBV (SOT-23-5) package is 100.8°C/W under JEDEC-standard PCB conditions (2s2p, no vias), and 100.8°C/W on the LP087A evaluation module per Section 5.4 of SBVS322C. Real-world performance depends on PCB copper area and airflow; adding thermal vias under Pin 2 (GND) significantly improves heat dissipation.

Is TLV75728PDBVR stable with a 22µF output capacitor?

Yes, TLV75728PDBVR is stable with output capacitors up to 200µF, including 22µF ceramic or polymer types. However, TI specifies optimal performance with 1µF to 22µF X5R/X7R ceramics. Larger values may increase startup time and reduce phase margin marginally; always verify transient response in final layout using the recommended 1µF minimum.