Infineon Technologies TLE4263GXUMA1

Overview

TLE4263GXUMA1 from Infineon Technologies is a monolithic 5.0 V low-dropout linear voltage regulator in PG-DSO-8 exposed pad package, designed for automotive power supply and microcontroller supervision. It delivers up to 180 mA output current with ≤±2% output voltage tolerance, integrated watchdog timer, programmable power-on/undervoltage reset, and reverse polarity protection. It operates across -40°C to +150°C and supports input voltages up to 45 V.

For engineers reviewing the TLE4263GXUMA1 datasheet, TLE4263GXUMA1 pinout, TLE4263GXUMA1 application, or TLE4263GXUMA1 equivalent, this device serves as a system-level power supervisor and reset manager in engine control units, body electronics, and ADAS modules where high reliability, thermal robustness, and functional safety features are required.

Technical Context

The TLE4263GXUMA1 integrates a precision bandgap reference, error amplifier, series pass transistor with saturation control, overtemperature shutdown, short-circuit current limiting, and reverse-polarity protection circuitry. Its reset generator responds to output voltage drops below an adjustable threshold (down to 3.5 V) and provides programmable delay via external capacitor CD.

The watchdog function monitors rising-edge pulses on the W input with timing set by the same CD capacitor; missing pulses trigger RO low. The inhibit input (INH) disables regulation, reducing quiescent current to ≤0.9 µA at TJ ≤ 115°C. All protections operate within AEC-Q100 Grade 0 qualification limits.

Key Specifications

Pinout & Package

Package: PG-DSO-8 exposed pad (RoHS-compliant, thermally enhanced SMD). Exposed pad must be soldered to PCB copper area for thermal and electrical grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive LDO supervisor applications.

Compared with TLV70733PDRVR and MAX6326US31D3+, the TLE4263GXUMA1 uniquely combines 5 V regulation, AEC-Q100 Grade 0 qualification, watchdog, programmable reset, and exposed-pad thermal performance - making it irreplaceable for integrated automotive power supervision where space, reliability, and functional safety converge.

Availability

TLE4263GXUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS camera modules requiring stable component supply, long-term automotive lifecycle support, and RoHS-compliant sourcing.

Supply support for TLE4263GXUMA1 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 quality certification aligned to ISO/TS 16949.

The TLE4263GXUMA1 belongs to Infineon's OPTIREG™ Linear family - engineered specifically for automotive power supply and system supervision, emphasizing thermal resilience, functional safety, and integration of reset/watchdog functions in a single package.

FAQ

What is the minimum input voltage required for regulation at full 180 mA load?

The dropout voltage is 0.35 V typical at 150 mA, and the output is regulated at 5.00 V ±2%. Therefore, the minimum input voltage is 5.10 V + 0.35 V = 5.45 V to maintain regulation at full load and maximum output tolerance. At cold-crank conditions down to 4.5 V input, the device enters dropout but continues supplying reduced voltage with current limiting.

Can the watchdog and reset delay share the same external capacitor?

Yes - the D pin serves both functions. The same ceramic capacitor CD connected between D and GND sets both the power-on reset delay time and the watchdog timeout period. The internal circuitry uses the same RC time constant for both timing functions, simplifying design and reducing component count.

Is the RO output compatible with 3.3 V logic systems?

Yes - RO is an open-collector output with internal 30 kΩ pull-up to Q (5 V). When interfacing with 3.3 V logic, connect an external pull-up resistor to 3.3 V and ensure the logic input's high-level threshold is ≤0.7 × 3.3 V = 2.31 V. RO sinking capability exceeds 4 mA, supporting direct drive of most 3.3 V inputs.

How does the RADJ pin adjust the reset threshold, and what is the lowest achievable value?

RADJ accepts a divided version of V_Q. When a resistor divider scales V_Q to ≤1.35 V at RADJ, the reset generator triggers. With V_Q = 5.0 V, a 2.78:1 divider yields 1.35 V at RADJ, corresponding to a reset threshold of 3.5 V at Q. The datasheet confirms 3.5 V is the minimum achievable threshold using external resistors.