Texas Instruments TL751L12CDRG4

Overview

TL751L12CDRG4 from Texas Instruments is a 12-V fixed-output, low-dropout linear voltage regulator in SOIC-8 package with TTL/CMOS-compatible enable input, 0.6 V dropout at 150 mA, ±1% output voltage accuracy over 0°C to 125°C, and integrated reverse-transient (–50 V), load-dump (60 V), and thermal-overload protection. It serves as a primary power rail regulator in automotive body control modules requiring stable 12-V supply under harsh battery conditions.

For engineers reviewing the TL751L12CDRG4 datasheet, TL751L12CDRG4 pinout, TL751L12CDRG4 application, or TL751L12CDRG4 equivalent, key selection criteria include enable-controlled sequencing, ultra-low quiescent current (<500 µA in disable), dropout performance below 0.6 V, reverse-battery tolerance, and SOIC-8 thermal resistance (θ_JA = 97°C/W).

Technical Context

The TL751L12CDRG4 implements a PNP pass transistor architecture enabling low dropout operation while maintaining stability with 10-µF tantalum output capacitance. Its internal enable logic drives the output to high-impedance when ENABLE is low, supporting controlled power-up/down in multi-rail systems.

Protection circuitry includes reverse-battery protection down to –15 V continuous and –50 V transient, 60-V load-dump immunity, internal current limiting, and thermal shutdown - all operating across the full 0°C to 125°C junction temperature range without external components.

Key Specifications

Pinout & Package

TL751L12CDRG4 is housed in an 8-pin SOIC (D) package per JEDEC MS-012AA, with 1.27-mm pitch, 1.75-mm max height, and exposed thermal pad not connected internally. Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout regulator applications.

Compared with TL750L12CDR and TPS7B6750QDDARQ1, TL751L12CDRG4 uniquely delivers 12-V regulation with active enable control in a cost-effective SOIC-8 package - essential for legacy and new 12-V automotive modules requiring programmable power management without board redesign.

Availability

TL751L12CDRG4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and telematics control units requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for TL751L12CDRG4 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 ICs, with decades of automotive qualification expertise and broad manufacturing scale.

The TL751L series was designed specifically for battery-powered automotive and industrial systems demanding robustness against reverse battery, load dump, and thermal stress - delivering reliable 12-V regulation without external protection components.

FAQ

What is the minimum input voltage required for TL751L12CDRG4 to maintain regulation at full load?

The TL751L12CDRG4 requires a minimum input voltage of 12.6 V to sustain 12-V output at 150 mA load, based on its 0.6 V dropout specification. Below this threshold, output voltage drops linearly with input; operation below 13 V is supported only at reduced current or elevated temperature per the recommended operating conditions table.

Does TL751L12CDRG4 require an external capacitor on the ENABLE pin for noise immunity?

No, TL751L12CDRG4 does not require an external capacitor on the ENABLE pin. Its ENABLE input has built-in hysteresis and noise filtering; TI's datasheet specifies no external components are needed. However, a 0.1-µF bypass capacitor near the pin is recommended if routed near noisy traces to prevent false triggering.

Can TL751L12CDRG4 be used in parallel to increase output current beyond 150 mA?

No, TL751L12CDRG4 is not designed for parallel operation. Its internal pass element lacks current-sharing features, and mismatched dropout voltages would cause uneven current distribution and potential thermal runaway. For >150 mA, select a higher-current regulator such as TL751L12CKTTR (TO-263, 500 mA capable).

What is the thermal performance of TL751L12CDRG4 in SOIC-8 under continuous 150 mA load at 85°C ambient?

At 85°C ambient and 150 mA load, TL751L12CDRG4 junction temperature reaches approximately 124°C using θ_JA = 97°C/W: T_J = 85 + (12.6 V − 12 V) × 0.15 A × 97 ≈ 124°C. This remains within the 125°C upper limit for the C-grade version, confirming safe operation with standard PCB copper.

Is TL751L12CDRG4 pin-compatible with other TL751L variants in SOIC-8 package?

Yes, all TL751LxxyCDR/G4 variants in SOIC-8 (e.g., TL751L05CDRG4, TL751L10CDRG4) share identical pinout, footprint, and enable logic. Only the output voltage differs; no PCB changes are required when substituting between 5-V, 8-V, 10-V, or 12-V versions in the same SOIC-8 package.