Infineon Technologies TLS810B1LDV50XUMA1

Overview

TLS810B1LDV50XUMA1 from Infineon Technologies is an AEC-Q100 qualified ultra-low-quiescent-current linear voltage regulator in PG-TSON-10 package, delivering fixed 5.0 V ±2% output at up to 100 mA with 5.5 µA quiescent current, 200 mV dropout at full load, and operation down to 2.75 V input-enabling reliable battery-connected automotive ECU and sensor supply during cranking.

For engineers reviewing the TLS810B1LDV50XUMA1 datasheet, TLS810B1LDV50XUMA1 pinout, TLS810B1LDV50XUMA1 application, or TLS810B1LDV50XUMA1 equivalent, key selection criteria include ultra-low I_Q for always-on systems, wide 2.75–42 V input range for direct battery tie-in, enable-controlled <1 µA off-mode current, thermal shutdown, and output current limiting for robustness in harsh automotive environments.

Technical Context

The TLS810B1LDV50XUMA1 implements a bandgap-referenced linear regulation architecture with fast transient response enabled by a single 1 µF ceramic output capacitor. Its tracking region begins at 2.75 V input, allowing stable 5 V output even during engine cranking when battery voltage dips below 6 V.

Internal protection includes foldback current limiting (typ. 120 mA trip), thermal shutdown at ~160 °C junction temperature, and integrated pull-down on EN pin for default-off behavior. The device operates across –40 °C to +150 °C ambient, validated per AEC-Q100 Grade 1 requirements.

Key Specifications

Pinout & Package

Package: PG-TSON-10 (3 mm × 3 mm, 0.5 mm pitch, exposed thermal pad). Pin 1 = Input (I), Pin 3 = Enable (EN), Pin 5 = Ground (GND), Pin 9 = Output (Q); all other pins are not connected (N.C.). Exposed pad must be soldered to PCB GND plane for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV73350PDBVR and MAX1725EUT+T, TLS810B1LDV50XUMA1 uniquely combines AEC-Q100 Grade 1 qualification, 2.75 V cranking support, integrated protection, and ultra-low I_Q in a thermally enhanced PG-TSON-10 package-making it the only drop-in solution for demanding under-hood and always-on automotive nodes.

Availability

TLS810B1LDV50XUMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine sensor supplies, RKE/immobilizer systems, and infotainment gateways requiring stable component supply across long production lifecycles and extreme temperature conditions.

Supply support for TLS810B1LDV50XUMA1 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 TLS810B1 belongs to Infineon's OPTIREG™ linear regulator product line, designed specifically for automotive power supply applications requiring ultra-low quiescent current, cranking resilience, and AEC-Q100 compliance.

FAQ

What is the minimum input voltage required for regulation under cranking conditions?

The TLS810B1LDV50XUMA1 begins regulation at 2.75 V input-verified across temperature and load-and maintains 5.0 V ±2% output down to this threshold. This extended tracking region enables continuous operation during engine cranking, where battery voltage can dip to 3–4 V, unlike standard LDOs that require ≥6 V input.

Does this device require an external output capacitor, and what are its specifications?

Yes: a 1 µF ceramic capacitor with ESR ≤100 Ω is mandatory at the Q pin for stability. The datasheet confirms stable operation with this minimal capacitance-no additional bulk or bypass caps needed. Placement must be within 3 mm of the Q and GND pins, directly adjacent to the exposed thermal pad.

How does the enable function behave during power-up and system reset?

The EN pin has an internal pull-down resistor (~1 MΩ), ensuring default OFF state at power-up. A logic-high signal ≥2.0 V activates regulation; transition time from enable to full output is <50 µs. During disable, output discharges through internal circuitry, and total current draw drops to <1 µA-verified across –40 °C to +125 °C.

Is thermal derating required when operating at maximum output current?

At 100 mA continuous load in still air on a 1s0p board, junction temperature rise is ~11°C/W × 100 mA = 11°C above ambient-well within the 150 °C max rating. However, with 600 mm² copper heatsink area, R_thJA drops to 64 K/W, allowing full 100 mA at +125 °C ambient without derating.