Infineon Technologies TLS810D1LDV33XUMA1

Overview

TLS810D1LDV33XUMA1 from Infineon Technologies is an AEC-Q100 qualified ultra-low-quiescent-current linear voltage regulator delivering fixed 3.3 V output at up to 100 mA, with 9 µA quiescent current, 2.75–42 V input range, and 250 mV typical dropout at full load. It serves as a primary power supply for automotive ECUs, sensor modules, and infotainment subsystems requiring permanent battery connection and cranking operation.

For engineers reviewing the TLS810D1LDV33XUMA1 datasheet, TLS810D1LDV33XUMA1 pinout, TLS810D1LDV33XUMA1 application, or TLS810D1LDV33XUMA1 equivalent, key selection criteria include ultra-low I_Q, integrated reset with adjustable delay, enable-controlled off-mode (<1 µA), thermal shutdown, and output current limiting - all validated for automotive-grade reliability under AEC-Q100.

Technical Context

The TLS810D1LDV33XUMA1 implements a bandgap-referenced linear regulation architecture with fast transient response enabled by minimal 1 µF ceramic output capacitance. Its tracking region begins at 2.75 V input, supporting stable 3.3 V output during engine cranking when battery voltage dips below 6 V.

It integrates dual protection logic: overtemperature shutdown triggered at T_j ≥ 150 °C and foldback current limiting activated during output short-to-ground. The open-collector reset output (RO) and capacitor-programmable delay pin (D) provide configurable power-on reset timing with undervoltage detection.

Key Specifications

Pinout & Package

Package: PG-TSON-10 (3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad). Designed for high-power-density automotive PCB layouts with enhanced thermal dissipation via soldered exposed pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear regulator applications.

Compared with TLV73333PDBVR and MAX1725EUK33+T, TLS810D1LDV33XUMA1 uniquely combines ultra-low 9 µA quiescent current, AEC-Q100 Grade 1 qualification, integrated reset with capacitor-programmable delay, and 2.75 V cranking capability - making it the only drop-in solution for safety-critical, battery-permanent automotive power rails.

Availability

TLS810D1LDV33XUMA1 is available at Aetrix Electronics and suitable for automotive body control modules, on-board diagnostic sensor hubs, and RKE transmitter modules requiring stable component supply across extended temperature and voltage stress conditions.

Supply support for TLS810D1LDV33XUMA1 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 global manufacturing and quality certification to IATF 16949.

TLS810D1LDV33XUMA1 belongs to the OPTIREG™ linear regulator product line, engineered specifically for automotive systems requiring ultra-low quiescent current, cranking resilience, and integrated functional safety features like reset and thermal protection.

FAQ

What is the minimum input voltage required for regulation at full 100 mA load?

The TLS810D1LDV33XUMA1 maintains regulation down to 2.75 V input - verified across temperature and process corners. At 100 mA load, this corresponds to a 250 mV dropout, meaning output remains stable at 3.3 V as long as input stays ≥3.55 V. Below 2.75 V, output tracks input linearly, supporting cranking operation.

How is the reset delay time configured, and what capacitor value yields a 50 ms delay?

Reset delay is set by connecting a capacitor between pin D and GND. Per datasheet Figure 21, a 47 nF capacitor provides approximately 50 ms delay at T_j = 25 °C. The relationship is linear: 100 nF ≈ 100 ms, 10 nF ≈ 10 ms. No external resistor is needed - timing relies solely on internal current source and capacitor value.

Can the exposed thermal pad be left unconnected in the PG-TSON-10 package?

No - the exposed pad must be soldered to a PCB copper area connected to GND. It serves as both thermal conduction path (R_thJC = 13 K/W) and electrical ground reference. Leaving it floating degrades thermal performance by >100 K/W and may cause instability or premature thermal shutdown under load.

Is the reset output (RO) compatible with 5 V logic systems?

Yes - RO is an open-collector output with internal 100 kΩ pull-up to V_Q (3.3 V), but it can safely sink current from external 5 V logic lines when pulled low. To interface with 5 V microcontrollers, add a 10 kΩ external pull-up to 5 V and confirm sink current remains within RO's 5 mA absolute maximum rating.