Texas Instruments TLV76112DCYR

Overview

TLV76112DCYR from Texas Instruments is a fixed-output, 1.2V, 1A linear voltage regulator in SOT-223-4 package, designed for high-current, low-quiescent-power applications requiring ±1% output accuracy, 60dB PSRR at 1kHz, and stable operation with 1µF ceramic output capacitors. It serves as a precision replacement for LM1117/TLV1117 in industrial power rails, motor drive bias supplies, and smart meter AVDD domains.

For engineers reviewing the TLV76112DCYR datasheet, TLV76112DCYR pinout, TLV76112DCYR application, or TLV76112DCYR equivalent, key selection criteria include dropout voltage (0.9–1.6V at 1A), thermal shutdown threshold (180°C), UVLO hysteresis (130mV), foldback current limiting, and compatibility with 2.5–18V input sources feeding 1.2V logic or analog subsystems.

Technical Context

The TLV76112DCYR implements a CMOS-based LDO architecture with internal bandgap reference (0.8V), integrated UVLO (2.2–2.4V rising threshold), and hybrid brick-wall/foldback current limiting-activating foldback at 50% of nominal output (0.6V). Its pass transistor operates in ohmic region during dropout, enabling regulated output down to VIN = VOUT + VDO but degrading transient response.

Thermal protection includes 180°C shutdown with 20°C hysteresis (reset at 160°C), while quiescent current remains at 65–100µA across –40°C to +125°C ambient. PSRR exceeds 60dB at 1kHz and maintains 40dB at 1MHz, directly suppressing switching noise from upstream DC/DC converters without additional filtering.

Key Specifications

Pinout & Package

SOT-223-4 package (6.5mm × 7mm) with exposed thermal pad; pin 1 = GND, pin 2 = OUT (and thermal tab), pin 3 = IN, pin 4 = OUT (redundant output connection).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV1117-1.2DCYR and LM1117DT-1.2/NOPB, the TLV76112DCYR delivers tighter accuracy, lower IQ, integrated protections, and higher PSRR-justifying its use where system reliability, standby power, and noise immunity are critical, despite slightly higher BOM cost.

Availability

TLV76112DCYR is available at Aetrix Electronics and suitable for industrial motor drives, smart energy meters, and HVAC control systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for TLV76112DCYR 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 power management technologies, with decades of LDO design expertise and broad industrial qualification.

The TLV761 product line targets high-current, low-quiescent-power applications in appliances, building automation, and energy infrastructure-designed to replace legacy x1117 regulators with enhanced accuracy, efficiency, and protection.

FAQ

What is the maximum input voltage rating for TLV76112DCYR?

The absolute maximum input voltage for TLV76112DCYR is 20V, with recommended operating range from 2.5V to 18V. Exceeding 20V risks permanent damage per TI's Absolute Maximum Ratings. Operation above 18V is not characterized and may violate thermal or electrical specifications; TLV76112DCYR must be used within its 2.5–18V operational window for guaranteed performance.

Does TLV76112DCYR require an input capacitor for stability?

No, TLV76112DCYR does not require an input capacitor for stability, but TI recommends ≥1µF ceramic capacitor between IN and GND to counteract source impedance and improve transient response. This capacitor mitigates ringing caused by PCB trace inductance and enhances PSRR-especially important when TLV76112DCYR is fed from a remote or high-impedance DC/DC converter output.

Can TLV76112DCYR operate with a 1µF ceramic output capacitor?

Yes, TLV76112DCYR is explicitly characterized and guaranteed stable with ≥1µF ceramic output capacitor (effective capacitance ≥0.47µF after derating). This eliminates reliance on higher-ESR tantalum or aluminum electrolytics, reducing board area and improving reliability. The 1µF value satisfies both stability and transient response requirements per TI's Recommended Operating Conditions.

What thermal protection features does TLV76112DCYR include?

TLV76112DCYR integrates thermal shutdown at 180°C (typical) with 20°C hysteresis (reset at 160°C), plus foldback current limiting to reduce power dissipation during overload. Unlike basic thermal shutdown, this hysteresis prevents cycling during marginal overheating. The device also specifies RθJA = 95.4°C/W for SOT-223, enabling accurate junction temperature estimation using TJ = TA + (RθJA × PD).

Is TLV76112DCYR pin-compatible with standard x1117 regulators?

Yes, TLV76112DCYR is pin-to-pin compatible with LM1117-1.2 and TLV1117-1.2 in the SOT-223-4 (DCY) package. Pin 1 = GND, pins 2 & 4 = OUT (shared), pin 3 = IN-matching x1117 pinout exactly. This allows direct replacement without PCB modification, retaining existing layout while upgrading to tighter accuracy, lower IQ, and enhanced protection features of TLV76112DCYR.