Texas Instruments TLV76133KVUR

Overview

TLV76133KVUR from Texas Instruments is a fixed-output 3.3 V, 1 A linear voltage regulator in TO-252 (KVU) package, designed for high-current, low-quiescent-power applications requiring ±1% output accuracy, 60 dB PSRR at 1 kHz, and stable operation with 1 µF ceramic output capacitors. It serves as a precision post-regulator in systems powered by DC/DC converters.

For engineers reviewing the TLV76133KVUR datasheet, TLV76133KVUR pinout, TLV76133KVUR application, or TLV76133KVUR equivalent, key selection criteria include dropout voltage (0.9–1.6 V at 1 A), thermal shutdown (180°C), UVLO thresholds (2.2–2.4 V rising), foldback current limiting, and compatibility with 2.5–18 V input rails in industrial and appliance power domains.

Technical Context

The TLV76133KVUR implements a CMOS-based LDO architecture with internal bandgap reference (0.8 V), integrated undervoltage lockout (UVLO) with 130 mV hysteresis, and hybrid brick-wall/foldback current limiting triggered at 50% of nominal output voltage. Its pass transistor operates in ohmic region during dropout, enabling tight regulation down to VIN = VOUT + VDO.

It delivers high PSRR (>60 dB @ 1 kHz, >40 dB @ 1 MHz) to suppress switching noise from upstream DC/DC stages, supports soft-start (500 µs typical) to limit inrush, and features internal output pulldown (0.7–1.1 mA) for controlled discharge during disable.

Key Specifications

Pinout & Package

TLV76133KVUR uses the 3-pin TO-252 (KVU) package (6.6 mm × 10.11 mm), with exposed thermal pad soldered to PCB for enhanced heat dissipation. The package is optimized for high-power density and industrial thermal environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1117-33KVUR and LM1117MPX-3.3/NOPB, the TLV76133KVUR provides tighter accuracy, lower quiescent current, integrated protection features, and superior PSRR-making it optimal for next-generation energy-efficient and safety-critical embedded systems where reliability and power integrity are prioritized.

Availability

TLV76133KVUR is available at Aetrix Electronics and suitable for appliance control boards, smart meter designs, and HVAC system power management requiring stable component supply, long-term lifecycle support, and traceable industrial-grade sourcing.

Supply support for TLV76133KVUR 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 expertise in power management ICs and industrial-grade reliability.

The TLV761 family was engineered to replace legacy x1117 regulators with improved accuracy, lower standby power, and integrated protection-targeting high-reliability applications in home automation, energy infrastructure, and industrial control.

FAQ

What is the maximum input voltage rating for TLV76133KVUR?

The absolute maximum input voltage for TLV76133KVUR is 20 V, with recommended operating range from 2.5 V to 18 V. Exceeding 20 V risks permanent damage. Operation above 18 V may degrade long-term reliability even if within absolute max ratings, as specified in Section 5.1 of the SBVS349D datasheet. Always maintain ≥0.3 V margin below 20 V in production designs using TLV76133KVUR.

Does TLV76133KVUR require an input capacitor for stability?

No, TLV76133KVUR does not require an input capacitor for loop stability, but TI recommends ≥1 µF ceramic capacitor between IN and GND to counteract source inductance/resistance and improve transient response and PSRR. This is especially critical when source impedance exceeds 0.5 Ω or when the device is located >2 inches from the power source-common in TLV76133KVUR deployments in motor drive PCBs.

Can TLV76133KVUR be used with ceramic output capacitors smaller than 1 µF?

No-TLV76133KVUR requires a minimum effective output capacitance of 0.47 µF for stability, and the recommended value is ≥1 µF ceramic (X7R/X5R/C0G dielectric). Using <1 µF increases risk of oscillation under load transients, particularly in TLV76133KVUR applications with fast-switching loads like motor gate drivers. The 1 µF minimum accounts for up to 50% capacitance loss due to DC bias and temperature effects.

How does the foldback current limit function in TLV76133KVUR during a short circuit?

In TLV76133KVUR, foldback current limiting activates when output voltage drops below 50% of nominal (i.e., <1.65 V for 3.3 V output), reducing output current from 1.1–1.6 A (brick-wall) to 150–350 mA (ISC). This lowers power dissipation [(VIN − VOUT) × ISC] during sustained shorts, delaying thermal shutdown and enabling safer fault recovery-critical in TLV76133KVUR use cases like HVAC fan control where intermittent overloads occur.

Is TLV76133KVUR pin-compatible with standard LM1117-3.3 in TO-252 packages?

Yes-TLV76133KVUR is explicitly pin-to-pin compatible with LM1117-3.3 and TLV1117-33 in the TO-252 (KVU) package, sharing identical pin 1 (IN), pin 2 (OUT/tab), and pin 3 (GND) assignments and mechanical footprint. This allows direct substitution in existing LM1117-3.3 layouts without PCB revision, while delivering improved accuracy, lower I_Q, and added protection features in TLV76133KVUR.