Texas Instruments TLV75519PDBVR

Overview

TLV75519PDBVR from Texas Instruments is a 500mA, low-quiescent-current (25μA typical), fixed 1.9V output LDO regulator in SOT-23-5 (DBV) package, supporting 1.45V–5.5V input range and delivering 1% output accuracy at 85°C. It features active output discharge, built-in soft-start, foldback current limiting, and stable operation with only 1µF ceramic output capacitor - ideal for powering microcontroller core rails in space-constrained portable electronics.

For engineers reviewing the TLV75519PDBVR datasheet, TLV75519PDBVR pinout, TLV75519PDBVR application, or TLV75519PDBVR equivalent, key selection considerations include its 238mV max dropout at 500mA (for 3.3VOUT), 46dB PSRR at 100kHz, thermal shutdown at 165°C, and compatibility with low-ESR ceramic capacitors without external compensation.

Technical Context

The TLV75519PDBVR implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR across 1kHz–1MHz. Its internal bandgap reference and error amplifier deliver 1% output accuracy over temperature, while integrated UVLO (1.21–1.44V threshold) prevents erratic startup under marginal input conditions.

Functional modes include normal regulation (VIN ≥ VOUT + VDO), dropout (VIN < VOUT + VDO, output tracks input), and disabled state (EN < 0.3V), where an internal 120Ω pulldown actively discharges the output. Thermal shutdown (165°C trip, 155°C reset) and foldback current limit protect against sustained overload or short-circuit faults.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.9mm × 2.8mm footprint with exposed pad option (DYD) not applicable to TLV75519PDBVR; thermal resistance RθJA = 100.8°C/W (JEDEC standard PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC75519DBVR and MCP1755-1902E/DB, TLV75519PDBVR provides tighter output accuracy (±1%), lower dropout, active discharge, and integrated soft-start - making it optimal for sequenced, battery-powered, or noise-sensitive systems where reliability and compactness are prioritized.

Availability

TLV75519PDBVR is available at Aetrix Electronics and suitable for wearable electronics, industrial edge controllers, smart home audio systems, and medical point-of-care devices requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TLV75519PDBVR 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 broad automotive, industrial, and consumer qualification.

The TLV755P family was engineered for ultra-small, low-IQ power management in battery-operated and space-constrained applications - targeting modern MCUs, sensors, and portable human-interface devices needing precise, efficient, and robust local regulation.

FAQ

What is the maximum input voltage rating for TLV75519PDBVR?

The absolute maximum input voltage for TLV75519PDBVR is 6.0V, but the recommended operating range is 1.45V to 5.5V. Exceeding 6.0V risks permanent damage per the Absolute Maximum Ratings table. For reliable operation, maintain VIN ≤ 5.5V and ensure sufficient margin above the 1.9V output to sustain regulation - e.g., minimum VIN = 1.9V + VDO (238mV max) = 2.138V at full load.

Does TLV75519PDBVR require an external pull-up resistor on the EN pin?

No, TLV75519PDBVR includes an internal pulldown resistor on the EN pin (120Ω to GND), so no external pull-up is required for default-off behavior. If active-high enable is needed, drive EN directly from a GPIO or logic signal ≥1V. Leaving EN unconnected results in guaranteed shutdown due to the internal pulldown - ensuring safe power-up sequencing without external components.

Can TLV75519PDBVR operate stably with less than 1µF output capacitance?

No - the TLV75519PDBVR is specified and characterized for stability with ≥1µF ceramic output capacitance (X5R/X7R). Using smaller values (e.g., 0.47µF) may cause oscillation or degraded transient response. The datasheet explicitly states "nominal derating on these capacitors is 50%" and requires effective capacitance ≥0.47µF at the pin; thus, a 1µF rated capacitor (derated to ~0.5µF at bias) meets this requirement.

What is the thermal performance of TLV75519PDBVR in the SOT-23-5 (DBV) package?

In JEDEC-standard PCB conditions, TLV75519PDBVR (DBV) has RθJA = 231.1°C/W. On the LP087A evaluation module, RθJA = 100.8°C/W. With 500mA load and 3.3V input (1.4V drop), power dissipation is 0.7W - resulting in ~71°C junction rise above ambient on the EVM. For continuous operation, keep ambient ≤54°C to stay below the 125°C max operating junction temperature.

How does the foldback current limit behave during a short-circuit event on TLV75519PDBVR?

During output short-circuit, TLV75519PDBVR initially delivers ~355mA (ISC), then folds back current as VOUT drops below 0.4×1.9V = 0.76V. This reduces power dissipation in the PMOS pass element, delaying thermal shutdown. Once TJ reaches 165°C, the device shuts down; it auto-restarts at 155°C if the fault persists - cycling until fault removal. This protects both the IC and PCB traces during sustained overloads.