Infineon Technologies TLE4305GXUMA1

Overview

TLE4305GXUMA1 from Infineon Technologies is a dual-loop voltage- and current-regulator IC for secondary-side control in isolated switch-mode power supplies (SMPS), featuring ±0.5% reference voltage accuracy (2.5 V ±25 mV), 8–42 V supply range, and integrated temperature-compensated OTAs for independent voltage/current loop compensation. It drives opto-isolators to regulate primary-side PWM duty cycle in automotive and industrial SMPS.

For engineers reviewing the TLE4305GXUMA1 datasheet, TLE4305GXUMA1 pinout, TLE4305GXUMA1 application, or TLE4305GXUMA1 equivalent, key selection criteria include its dual OTA architecture, 1 kΩ internal output series resistors on VCO/CCO/OUT pins, ±50 ppm/K reference drift, and PG-DSO-8 package compatibility with high-voltage isolation requirements.

Technical Context

The TLE4305GXUMA1 implements two fully temperature-compensated operational transconductance amplifiers (OTAs): one for voltage regulation (VSE→VCO) and one for current regulation (CSE/CRE→CCO), each with internal 1 kΩ series output resistors and gain-bandwidth product of 500 kHz. Its bandgap reference (2.5 V ±25 mV) feeds both loops and exhibits ±50 ppm/K drift over −40 °C to +150 °C.

It operates within an 8–42 V supply range and delivers up to 3 mA output current at OUT pin, with clamped 3–5.5 V output voltage range. The device uses Infineon's DOPL (double isolated power line) technology enabling 45 V breakdown tolerance and integration of high-voltage bias circuitry alongside low-noise analog control functions.

Key Specifications

Pinout & Package

Package: PG-DSO-8 (RoHS-compliant, surface-mount, 8-pin exposed pad SOIC variant with enhanced thermal performance).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage/current regulator applications.

Compared with UC3845BD1R2G and TL431ACDBVR, the TLE4305GXUMA1 uniquely integrates dual independent OTAs, a precision bandgap, and an opto-driver in one PG-DSO-8 package-enabling compact, high-accuracy secondary-side regulation without external active components.

Availability

TLE4305GXUMA1 is available at Aetrix Electronics and suitable for automotive on-board chargers, industrial isolated DC-DC converters, and medical power supply monitoring requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for TLE4305GXUMA1 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 electronics, and industrial control ICs, with leadership in high-voltage analog and mixed-signal integration.

The TLE4305GXUMA1 belongs to Infineon's TLE family of secondary-side SMPS regulators, designed specifically for opto-isolated feedback in automotive and industrial power supplies where precision, temperature stability, and functional safety are critical.

FAQ

What is the function of the CRE pin on the TLE4305GXUMA1?

The CRE (Current-OTA Reference Input) pin serves as the non-inverting input to the internal current-sense operational transconductance amplifier. It establishes the reference threshold for current regulation-typically biased at 2.5 V-and works with CSE to detect load current via a sense resistor. Its input current is specified at −1.0 to 0 µA, minimizing loading on external bias networks.

Can the TLE4305GXUMA1 regulate both voltage and current simultaneously?

Yes-the TLE4305GXUMA1 implements two independent control loops: a voltage loop (VSE→VCO) and a current loop (CSE/CRE→CCO), each with dedicated OTAs, internal compensation resistors, and temperature compensation. During overload, the current loop dominates and forces the OUT pin to limit output current while maintaining voltage regulation integrity.

Is external compensation required for stable operation?

Yes-external RC networks must be connected from VCO and CCO to GND to stabilize both control loops. The internal 1 kΩ series resistors on VCO and CCO set the base impedance; typical compensation uses 1–10 nF capacitors and optional series resistors to shape loop gain and phase margin per application requirements.

Does the TLE4305GXUMA1 support 48 V input systems?

No-the absolute maximum supply voltage is 45 V, and the recommended operating range is 8–42 V. While 48 V nominal systems may briefly exceed 42 V during transients, sustained operation above 42 V violates the operating range and risks reliability degradation; a pre-regulator or clamp circuit is required for true 48 V input compatibility.