Infineon Technologies TLE4295GV33

Overview

TLE4295GV33 from Infineon is a monolithic low-dropout linear voltage regulator in PG-SCT595-5 package, delivering 3.3 V ±4% output at up to 30 mA with dropout voltage as low as 0.25 V at 20 mA. It features power-fail detection (open-collector PF pin), reverse-polarity protection, short-circuit and overtemperature shutdown, and operates across -40°C to +150°C junction temperature for automotive microcontroller supply rails.

For engineers reviewing the TLE4295GV33 datasheet, TLE4295GV33 pinout, TLE4295GV33 application, or TLE4295GV33 equivalent, key selection criteria include its AEC-Q100 qualification, 45 V max input, 2.2 µF/≤5 Ω ESR output capacitor requirement, and integrated PF flag for undervoltage monitoring in safety-critical subsystems.

Technical Context

The TLE4295GV33 integrates bandgap reference, error amplifier, pass transistor control, thermal shutdown, and saturation-detection circuitry to generate stable 3.3 V output under wide input (4.3–45 V) and load (1–30 mA) variations. Its PF output asserts low during input undervoltage, output saturation, or overload-enabling host MCU reset or fault logging.

Designed for automotive environments, it uses internal current limiting and thermal foldback to survive reverse-battery conditions and sustained short circuits without external components. The PG-SCT595-5 package enables compact PCB layout with dual GND pins for improved thermal conduction and noise immunity.

Key Specifications

Pinout & Package

Package: PG-SCT595-5 - 5-pin surface-mount package with exposed thermal pad, 1.6 mm × 1.6 mm footprint, 0.5 mm pitch, and dual GND pins (pins 2 and 5) for low-inductance grounding and thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73333PDBVR and NCP1117ST33T3G, the TLE4295GV33 uniquely combines AEC-Q100 Grade 0, integrated PF flag, reverse-polarity survival, and sub-0.3 V dropout-making it the only choice for space-constrained, fault-aware 30 mA automotive rails.

Availability

TLE4295GV33 is available at Aetrix Electronics and suitable for body control modules, instrument clusters, engine sensor interfaces, and ADAS camera modules requiring stable component supply across automotive production lifecycles.

Supply support for TLE4295GV33 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 security solutions, with global R&D and manufacturing infrastructure.

The OPTIREG™ linear family delivers robust, AEC-Q100-qualified voltage regulators optimized for harsh automotive environments-including start-stop, load dump, and extended temperature operation.

FAQ

What is the minimum input voltage required for regulation at full 30 mA load?

The TLE4295GV33 maintains regulation down to an input voltage of 3.55 V at 20 mA load (0.25 V dropout). At 30 mA, typical dropout rises to 0.40 V, requiring ≥3.70 V input. Below this threshold, the PF pin asserts low and output collapses-ensuring predictable fault behavior.

Can the PF pin drive an LED directly without a current-limiting resistor?

No. The PF pin is an open-collector NPN output rated for ≤500 µA sink current. Driving even a low-current LED (typically 2–5 mA) would exceed its capability and cause malfunction. A pull-up resistor to 3.3 V or 5 V and optional buffer transistor is required for indicator use.

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

Yes-an input capacitor is mandatory for stability and transient suppression. Infineon recommends ≥10 µF X7R ceramic capacitor placed within 2 mm of pin 3 (I), with low ESL. This mitigates high-frequency noise from alternators or DC-DC converters upstream and prevents oscillation during load steps.

Does the TLE4295GV33 require a heatsink in a 30 mA, 12 V-to-3.3 V application?

No. With 8.7 V drop × 30 mA = 261 mW dissipation and R_thJA = 179 K/W, junction temperature rise is ~47°C above ambient. At 85°C ambient, T_j ≈ 132°C-within the 150°C limit. The exposed thermal pad soldered to PCB copper suffices; no external heatsink is needed.