Infineon Technologies TLS805D1LDV50XUMA1

Overview

TLS805D1LDV50XUMA1 from Infineon Technologies is an AEC-Q100 qualified ultra-low-quiescent-current linear voltage regulator delivering a fixed 5.0 V ±2% output at up to 50 mA, with 9 µA quiescent current, 100 mV typical dropout at full load, and operation across 2.75 V–42 V input range-designed for always-on automotive battery-connected systems such as body control modules and telematics.

For engineers reviewing the TLS805D1LDV50XUMA1 datasheet, TLS805D1LDV50XUMA1 pinout, TLS805D1LDV50XUMA1 application, or TLS805D1LDV50XUMA1 equivalent, key selection criteria include cranking-mode support (2.75 V start), integrated reset with adjustable delay, enable-controlled <1 µA off-state current, and PG-TSON-10 thermal performance with exposed pad grounding.

Technical Context

The TLS805D1LDV50XUMA1 implements a bandgap-referenced linear regulation architecture with fast transient response enabled by internal compensation requiring only 1 µF ceramic output capacitance (ESR ≤100 Ω). Its tracking region begins at 2.75 V input, enabling stable 5 V output during cold-cranking events where battery voltage dips below 6 V.

Integrated protection includes foldback current limiting (not fixed trip), thermal shutdown at ~150 °C junction temperature, and open-collector reset output with undervoltage detection and programmable delay via external capacitor on pin D. Enable logic features internal pull-down for default-off operation.

Key Specifications

Pinout & Package

Package: PG-TSON-10 (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad (must be connected to GND for thermal and electrical integrity).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and MAX16910ATA/V+T, TLS805D1LDV50XUMA1 uniquely balances ultra-low IQ (9 µA), full battery-range operation (2.75–42 V), and user-configurable reset timing-making it optimal for cost-sensitive, cranking-resilient automotive modules where discrete reset timing adds complexity.

Availability

TLS805D1LDV50XUMA1 is available at Aetrix Electronics and suitable for body control modules, telematics units, ADAS camera ECUs, and electronic parking brake controllers requiring stable component supply under automotive qualification and long-term lifecycle assurance.

Supply support for TLS805D1LDV50XUMA1 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 security solutions, with global manufacturing and automotive qualification infrastructure.

The TLS805D1 series belongs to Infineon's automotive-grade linear regulator product line, engineered specifically for permanent-battery-connected systems demanding ultra-low quiescent current, cranking resilience, and integrated system supervision functions.

FAQ

What is the minimum input voltage required for regulation during engine cranking?

The TLS805D1LDV50XUMA1 maintains regulation down to 2.75 V input-well below typical cranking voltages (4–6 V)-ensuring continuous 5 V output to critical microcontrollers and CAN interfaces without brownout or reset assertion during engine start.

How is the reset delay time configured, and what capacitor value yields a 200 ms delay?

Reset delay is set by connecting a ceramic capacitor between pin D and GND. For a 200 ms delay, a 220 nF capacitor is recommended per the datasheet's delay vs. capacitance curve (Figure 12), with tolerance and temperature drift affecting accuracy by ±15%.

Can the exposed thermal pad be left unconnected in low-power applications?

No-the exposed pad must be soldered to a GND plane regardless of power level. It serves both thermal conduction (reducing R_θJA by ~30 °C/W) and electrical grounding for internal ESD protection structures; leaving it floating violates AEC-Q100 layout requirements and risks latch-up.

Does the device support reverse-polarity protection, and what happens if input is connected backwards?

The TLS805D1LDV50XUMA1 has no built-in reverse-polarity protection. Applying negative voltage to pin I exceeds absolute maximum rating (–0.3 V), risking immediate ESD diode conduction, junction damage, or catastrophic failure-external protection (e.g., series Schottky diode) is mandatory in reverse-voltage-prone installations.