Infineon Technologies TLE4284DV18NTMA1

Overview

TLE4284DV18NTMA1 from Infineon Technologies is a monolithic NPN-type fixed-output 1.8 V automotive voltage regulator in PG-TO252-3-11 (DPAK) package, delivering up to 1.0 A output current with typical dropout voltage of 1.2 V at 500 mA, short-circuit and overtemperature protection, and operation from −40 °C to 150 °C junction temperature - deployed in engine control units and body electronics.

For engineers reviewing the TLE4284DV18NTMA1 datasheet, TLE4284DV18NTMA1 pinout, TLE4284DV18NTMA1 application, or TLE4284DV18NTMA1 equivalent, key selection criteria include guaranteed 1.8 V ±2.8% output accuracy across load (10–1000 mA) and input (3.2–40 V), thermal resistance of 78 K/W with 300 mm² heatsink, and AEC-Q100 qualification for under-hood use.

Technical Context

The TLE4284DV18NTMA1 integrates an internal reference, error amplifier, and NPN pass transistor in a single die, regulating input voltages from (V_Q + V_DR) up to 40 V to a stable 1.8 V output. Its protection logic triggers thermal shutdown at ~170 °C junction temperature and limits current to ≥1000 mA under normal conditions and ≥50 mA at 40 V input.

Unlike LDOs using PMOS pass devices, this NPN-based regulator requires minimum headroom of 1.0 V at light load and up to 1.4 V at full 1.0 A, with line regulation of ≤27 mV and load regulation of ≤9 mV - enabling robust supply to low-voltage microcontrollers in start-stop automotive systems.

Key Specifications

Pinout & Package

PG-TO252-3-11 (DPAK) surface-mount package with exposed thermal pad (Pin 2/Tab). Pin 1 is GND, Pin 2/Tab is Q (output), Pin 3 is I (input). The tab must be soldered to PCB copper area ≥300 mm² for thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73318PDBVR and NCP1117DT18T5G, the TLE4284DV18NTMA1 uniquely combines 1.0 A capability, Grade 0 AEC-Q100 qualification, and 150 °C junction rating - making it the only option validated for direct integration into engine, transmission, and ADAS control modules.

Availability

TLE4284DV18NTMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera systems requiring stable component supply under automotive qualification and long-term lifecycle support.

Supply support for TLE4284DV18NTMA1 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 industrial control solutions, with global manufacturing and qualification infrastructure.

The TLE4284 series belongs to Infineon's automotive linear regulator product line, engineered specifically for harsh-environment power delivery to microcontrollers, sensors, and communication interfaces in powertrain and chassis systems.

FAQ

Is TLE4284DV18NTMA1 pin-compatible with other TLE4284 variants like DV15 or DV33?

Yes - all TLE4284 fixed-output versions (DV15, DV18, DV26, DV33, DV50) share identical PG-TO252-3-11 pinout: Pin 1 = GND, Pin 2/Tab = Q, Pin 3 = I. Output voltage is set internally; no external components are required, enabling direct substitution where voltage rails match system requirements.

What is the minimum input voltage needed to maintain 1.8 V output at 1.0 A load?

The minimum input voltage is 3.2 V, derived from the maximum dropout voltage of 1.4 V at 1.0 A (1.8 V + 1.4 V = 3.2 V). Below this, regulation fails and output collapses. This allows operation during cold-crank when battery voltage dips to ~6 V, but not below 3.2 V.

Does TLE4284DV18NTMA1 require an external capacitor on the output pin?

Yes - a minimum 10 µF ceramic capacitor with ESR ≤10 Ω must be placed between Pin 2 (Q) and Pin 1 (GND), directly at the regulator output. This stabilizes the control loop, suppresses high-frequency noise, and ensures transient response meets automotive test standards (e.g., ISO 7637-2 pulse 5a).

Can TLE4284DV18NTMA1 be used without a heatsink in a 2-layer PCB?

No - without a heatsink (≥300 mm² copper area), thermal resistance rises to 144 K/W. At 1.0 A and 25 °C ambient, junction temperature would exceed 150 °C (T_j ≈ 25 + 144 × (1.8 × 1.0) ≈ 167 °C), triggering thermal shutdown. A dedicated thermal pad and inner-layer copper pour are mandatory for full-load operation.