Infineon Technologies TLE4284DV15ATMA1

Overview

TLE4284DV15ATMA1 from Infineon Technologies is a monolithic NPN-type fixed-output 1.5 V low-dropout linear 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 qualified for automotive applications per AEC-Q100.

For engineers reviewing the TLE4284DV15ATMA1 datasheet, TLE4284DV15ATMA1 pinout, TLE4284DV15ATMA1 application, or TLE4284DV15ATMA1 equivalent, key selection criteria include guaranteed 1.5 V ±50 mV output accuracy across 10 mA–1.0 A load, operation up to 40 V input, junction temperature range of −40 °C to +150 °C, and thermal resistance of 78 K/W with 300 mm² heatsink.

Technical Context

The TLE4284DV15ATMA1 implements a fixed-output NPN pass transistor architecture with internal reference and feedback control, enabling stable regulation without external resistors. Its dropout behavior is defined by V_DR = 1.0–1.4 V depending on load current, and it maintains regulation down to 2.9 V input for 1.5 V output.

Protection circuitry includes foldback current limiting (1000–2200 mA trip), thermal shutdown at ~170 °C junction, and short-circuit safe operating area. It operates with no minimum load requirement above 1 mA, and supports RMS output noise of 30 ppm of V_Q (10 Hz–10 kHz).

Key Specifications

Pinout & Package

Package: PG-TO252-3-11 (DPAK), surface-mount, thermally enhanced with exposed tab connected to Pin 2 (Q). Tab must be soldered to PCB copper pour for thermal conduction and electrical connection to output.

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP1117ST15T3G and TLV73315PDBVR, the TLE4284DV15ATMA1 uniquely delivers AEC-Q100 Grade 0 compliance, integrated foldback current limiting, and validated 150 °C junction operation-making it the only option for primary power in high-temperature engine compartment ECUs.

Availability

TLE4284DV15ATMA1 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS camera modules, body control modules, and infotainment systems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for TLE4284DV15ATMA1 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 belongs to Infineon's TLE automotive linear regulator family, designed specifically for demanding under-hood and safety-critical power delivery where high temperature resilience, integrated protection, and AEC-Q100 compliance are mandatory.

FAQ

What is the maximum allowable input voltage for TLE4284DV15ATMA1?

The absolute maximum input voltage is 40 V, and the device operates reliably across the full range of 2.9 V to 40 V input. At 40 V input, the internal current limit reduces to 50–200 mA to prevent thermal runaway, so sustained operation above 24 V requires careful thermal design and derating per the datasheet's VI–VQ curves.

Does TLE4284DV15ATMA1 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 adjacent to the device. This capacitor stabilizes regulation, suppresses high-frequency noise, and supports transient response during load steps; omitting it risks oscillation or loss of regulation under dynamic loads.

Can TLE4284DV15ATMA1 be used without a heatsink in a 1.0 A application?

No - at 1.0 A continuous load with 12 V input, power dissipation exceeds 10 W. With R_thJA = 144 K/W (no heatsink), junction temperature would exceed 150 °C even at 25 °C ambient. A minimum 300 mm² copper heatsink (R_thJA = 78 K/W) is required to maintain T_j ≤ 150 °C at full load and 85 °C ambient.

Is the output voltage adjustable on TLE4284DV15ATMA1?

No - the "DV15" suffix denotes the fixed 1.5 V output version. Adjustable versions (e.g., TLE4284DV) use Pin 1 as ADJ and require external resistor dividers. This part has internal feedback network tied to GND, so Pin 1 is permanently configured as GND and cannot be repurposed.