Infineon Technologies TLE42672GATMA2CT

Overview

TLE42672GATMA2CT from Infineon Technologies is a 5-V automotive-grade low-dropout linear voltage regulator in PG-TO220-7-4 package, delivering ≥400 mA output current with ±2% output voltage tolerance, input voltage range of 5.5–40 V, and integrated reset function with adjustable delay via external capacitor. It serves as primary power supply for ECUs, body control modules, and sensor interfaces requiring robust overvoltage (60 V/400 ms), reverse polarity, overtemperature, and short-circuit protection.

For engineers reviewing the TLE42672GATMA2CT datasheet, TLE42672GATMA2CT pinout, TLE42672GATMA2CT application, or TLE42672GATMA2CT equivalent, key selection considerations include its dual logic control (E2 inhibit / E6 hold), open-collector reset output (RO), self-holding capability without external latching components, and AEC-Q100 qualification for under-hood automotive use.

Technical Context

The TLE42672GATMA2CT implements a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation across load and temperature. Its reset generator monitors output voltage (VRT ≈ 4.65 V) and discharges an external capacitor (CD) on undervoltage, asserting RO low after programmable delay.

Turn-on/off logic uses two dedicated pins: E2 (inhibit, active-high, internal 100 kΩ pull-down) and E6 (hold, active-low, internal 50 kΩ pull-up to VQ). The truth table defines six stable states including self-holding operation-enabling ignition-independent runtime when E6 is pulled low while E2 transitions low.

Key Specifications

Pinout & Package

Package: PG-TO220-7-4 - thermally enhanced through-hole package with exposed rear-side GND tab for direct heatsink mounting; R_thJC = 6 K/W enables >400 mA continuous operation at T_J ≤ 150 °C with minimal heatsinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5-V automotive LDO regulator applications.

Compared with TLV73350PDBVR and TPS7B8250QDGNRQ1, the TLE42672GATMA2CT uniquely combines AEC-Q100 Grade 0 rating, dual logic control (E2/E6), capacitor-adjustable reset, and 400 mA output in a thermally robust TO220 package-making it irreplaceable for ignition-managed, high-reliability ECU power domains.

Availability

TLE42672GATMA2CT is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera power supplies, and transmission control units requiring stable component supply across extended automotive temperature and voltage stress conditions.

Supply support for TLE42672GATMA2CT 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 is a German semiconductor manufacturer specializing in power management, automotive ICs, and security solutions, with global manufacturing and AEC-Q100 validation infrastructure.

The TLE4267-2 product line delivers high-reliability linear regulators engineered specifically for automotive power distribution-emphasizing fault resilience, thermal robustness, and seamless integration into ignition-controlled subsystems.

FAQ

What is the minimum input voltage required for regulation?

The TLE42672GATMA2CT requires a minimum input voltage of 5.5 V to maintain 5.0 V output regulation. Below this threshold, the device enters dropout mode and output voltage tracks input minus dropout voltage (~0.5 V typical at 400 mA), with reset assertion occurring when VQ falls below ~4.65 V.

How is the reset delay time calculated from the external capacitor value?

Reset delay t_delay ≈ C_D × 1.2 μA / (V_UD − V_LD), where V_UD ≈ 1.25 V and V_LD ≈ 0.4 V per datasheet Figure 5. For example, a 100 nF capacitor yields ~100 ms delay; a 10 μF capacitor yields ~10 s. Capacitor must be low-leakage (e.g., X7R ceramic or tantalum).

Can the E6 (Hold) pin be left unconnected in standard operation?

No. Leaving E6 floating violates the truth table and may cause undefined behavior. When not used for self-holding, E6 must be actively driven high (e.g., tied to VQ via resistor) to disable hold function. Internal 50 kΩ pull-up ensures E6 defaults to high only if VQ is present and stable.

Is the RO (Reset Output) pin compatible with 3.3-V logic inputs?

Yes. RO is an open-collector NPN output with internal 30 kΩ pull-up to VQ (5 V). To interface with 3.3-V logic, add an external pull-down resistor (e.g., 10 kΩ) to limit voltage at the logic input to ≤3.3 V when RO is low, or use a level-shifting buffer for guaranteed compatibility.