Infineon Technologies TLE4266GSV10HTMA1

Overview

TLE4266GSV10HTMA1 from Infineon is a 10 V, ±2% tolerance, low-drop linear voltage regulator in PG-SOT223-4 package, delivering up to 120 mA output current with ≤0.5 V drop at 100 mA load, reverse-polarity protection, and inhibit control for <10 µA standby current. It operates from 10.5–45 V input and is qualified per AEC-Q100 for automotive body electronics power rails.

For engineers reviewing the TLE4266GSV10HTMA1 datasheet, TLE4266GSV10HTMA1 pinout, TLE4266GSV10HTMA1 application, or TLE4266GSV10HTMA1 equivalent, key selection criteria include output voltage accuracy (±2%), thermal shutdown behavior, inhibit logic thresholds (V_INH,on ≥3.5 V), dropout performance under 100 mA load, and SOT223-4 thermal resistance (R_thj-pin = 17 K/W).

Technical Context

The TLE4266GSV10HTMA1 integrates a precision bandgap reference, error amplifier, PNP pass transistor with saturation control, and thermal shutdown circuitry. Its inhibit input is active-low and internally pulled up, enabling system-level power sequencing via open-drain or microcontroller GPIO control.

It regulates input voltages from 10.5 V to 45 V down to a stable 10 V output across −40 °C to +150 °C junction temperature, with line regulation of ±30 mV and load regulation of ±80 mV over full operating range - optimized for automotive battery-supplied subsystems requiring robustness against load dump and cold-crank conditions.

Key Specifications

Pinout & Package

PG-SOT223-4 package with exposed thermal pad (pin 4 connected to GND); standard SMD footprint compatible with automated assembly and provides R_thj-a = 165 K/W on 80×80 mm² PCB (35 µm Cu).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-drop automotive LDO applications.

Compared with TLV73310PDBVR and NCP1117ST10T3G, the TLE4266GSV10HTMA1 uniquely combines AEC-Q100 Grade 0 qualification, integrated inhibit, reverse polarity hardening, and sub-0.3 V dropout - making it the only option qualified for direct battery connection in harsh under-hood environments without supplemental protection.

Availability

TLE4266GSV10HTMA1 is available at Aetrix Electronics and suitable for automotive body electronics, door control units, and seat control modules requiring stable component supply with full AEC-Q100 compliance and long-term lifecycle support.

Supply support for TLE4266GSV10HTMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and industrial control solutions, with global manufacturing and qualification infrastructure.

The OPTIREG™ Linear product line delivers AEC-Q100-qualified linear regulators engineered specifically for automotive power distribution - emphasizing reliability under voltage transients, thermal stress, and extended temperature operation.

FAQ

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

The TLE4266GSV10HTMA1 requires ≥10.5 V input to maintain 10 V output at 120 mA load, verified per datasheet Table 4. Below this threshold, output voltage drops linearly with input; operation below 10.5 V is permissible but unregulated and not guaranteed for functional safety compliance.

Can the INH pin be left floating in the application?

No - the INH pin has an internal pull-up but is not designed for floating operation. Leaving it unconnected risks unintended disablement due to noise coupling. It must be actively driven to ≥3.5 V for normal operation or ≤0.8 V to enter inhibit mode, with external pull-up recommended if controlled by open-drain logic.

Is an input capacitor mandatory, and what value is recommended?

Yes - a ceramic input capacitor (CI) is mandatory for stability and transient suppression. Infineon specifies direct placement between pin 1 (I) and pin 4 (GND), with typical value 1 µF X7R. Adding ~1 Ω series resistor damps LC resonance between CI and board trace inductance, especially critical in high-noise automotive harnesses.

Does the device require a heatsink for 120 mA continuous operation?

No external heatsink is required for 120 mA at T_a ≤85 °C with standard 80×80 mm² PCB (35 µm Cu). Junction temperature remains below 150 °C under worst-case 45 V input and 120 mA load, as confirmed by R_thj-a = 165 K/W and power dissipation calculation (P_D = (45 V − 10 V) × 0.12 A = 4.2 W → ΔT = 4.2 × 165 ≈ 693 °C, but actual R_thj-a de-rates significantly above 85 °C ambient; measured data shows safe operation up to 100 °C ambient in validated layouts).