Texas Instruments TLV751120280PDSQR

Overview

TLV751120280PDSQR from Texas Instruments is a dual-channel, 500-mA, high-accuracy low-dropout (LDO) regulator in a 2-mm × 2-mm WSON-10 package. It delivers fixed 1.2 V and 2.8 V outputs with ±1.5% accuracy over –40°C to +125°C, 130 mV max dropout at 500 mA (3.3 VOUT), 25 µA typical quiescent current, and active output discharge - enabling reliable power sequencing in space-constrained portable electronics.

For engineers reviewing the TLV751120280PDSQR datasheet, TLV751120280PDSQR pinout, TLV751120280PDSQR application, or TLV751120280PDSQR equivalent, this page provides verified electrical specs, validated dual-rail pin functions, confirmed thermal and transient performance data, and real-world implementation guidance for wearable sensors, EPOS terminals, and Wi-Fi modules.

Technical Context

The TLV751120280PDSQR integrates two independent LDO channels sharing a common ground and thermal pad, each with dedicated EN, IN, and OUT pins plus internal feedback networks for fixed 1.2 V and 2.8 V outputs. Its architecture includes foldback current limiting, undervoltage lockout (1.21–1.47 V rising threshold), and thermal shutdown (170°C trip).

Each channel operates independently: EN1 controls OUT1 (1.2 V), EN2 controls OUT2 (2.8 V); both support monotonic startup, active discharge during disable, and stability with ≥1 µF ceramic output capacitors. The device achieves 50 dB PSRR at 1 kHz and 53 µVRMS output noise (10 Hz–100 kHz, 0.9 VOUT).

Key Specifications

Pinout & Package

Package: WSON-10 (DSQ), 2.00 mm × 2.00 mm, exposed thermal pad (must be connected to GND plane for thermal performance).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV751120280PDSQR, neither alternative provides dual fixed outputs in one package: TPL7407LPG is a driver IC, not a regulator; TPS7A2028PDQNR lacks the 1.2 V channel and 500-mA per-rail capability - making TLV751120280PDSQR uniquely suited for space-constrained dual-rail designs.

Availability

TLV751120280PDSQR is available at Aetrix Electronics and suitable for wearable fitness monitors, portable point-of-sale terminals, and Wi-Fi client devices requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for TLV751120280PDSQR 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 product portfolios.

The TLV751 series was engineered for ultra-low-power, dual-rail applications in portable and battery-operated systems - prioritizing small footprint, high accuracy, and robust protection features without sacrificing transient performance.

FAQ

What are the exact output voltages of the TLV751120280PDSQR?

The TLV751120280PDSQR provides two fixed, factory-set output voltages: Channel 1 delivers 1.2 V ±1.5%, and Channel 2 delivers 2.8 V ±1.5%, both specified over –40°C to +125°C junction temperature. These values are trimmed during production and require no external feedback components - simplifying design and reducing BOM count.

Does the TLV751120280PDSQR support independent enable control for each output?

Yes, the TLV751120280PDSQR features fully independent enable inputs: EN1 (Pin 3) controls the 1.2 V output (OUT1), and EN2 (Pin 5) controls the 2.8 V output (OUT2). Each has defined thresholds (VEN(HI) = 1.0 V min, VEN(LO) = 0.3 V max), enabling precise power sequencing - for example, bringing up the 1.2 V core before enabling the 2.8 V I/O rail.

What is the minimum input voltage required for the TLV751120280PDSQR to regulate both outputs?

The TLV751120280PDSQR requires VIN ≥ 1.5 V minimum to operate, but regulation depends on dropout: for the 2.8 V output, VIN must be ≥ 2.93 V (2.8 V + 130 mV max dropout) at 500 mA load. For light loads, VIN can be as low as 2.85 V. The 1.2 V rail regulates down to VIN = 1.33 V under full load. Always verify margin using worst-case dropout data from the Electrical Characteristics table.

How does the active output discharge function work in the TLV751120280PDSQR?

When either EN pin is driven low, the TLV751120280PDSQR activates an internal pulldown transistor (RPULLDOWN ≈ 95 Ω) between the corresponding OUT pin and GND. This discharges output capacitance rapidly - time constant τ ≈ (95 Ω × RL) / (95 Ω + RL), where RL is parallel load resistance. For a 10-µF capacitor and 1-MΩ load, discharge completes in <1 ms, ensuring deterministic power-down behavior.

Can the TLV751120280PDSQR be used with ceramic capacitors smaller than 1 µF?

No - the TLV751120280PDSQR requires ≥1 µF ceramic output capacitance (X5R/X7R) on each channel for guaranteed stability, per Section 6.3 Recommended Operating Conditions. Using smaller values risks oscillation or degraded transient response. Input capacitance also requires ≥1 µF ceramic; both must be placed as close as possible to their respective IN/OUT pins to minimize parasitic inductance.