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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Infineon Technologies TLS805B1LDVXUMA1

Name: TLS805B1LDVXUMA1
Brand: Infineon Technologies
SKU: TLS805B1LDVXUMA1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TLS805B1LDVXUMA1

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 10-TFDFN Exposed Pad

Datasheet:: TLS805B1LDVXUMA1.pdf

Description:: IC REG LIN POS ADJ 50MA TSON-10

Quantity:: RFQ Add To RFQ list

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Inventory:3,373

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Product details

Overview

TLS805B1LDVXUMA1 from Infineon Technologies is an AEC-Q100 qualified ultra-low-quiescent-current linear voltage regulator in PG-DSO-8 package, delivering 5 µA quiescent current, 2.75 V–42 V input range, 50 mA output current, <1 µA off-mode current, and 100 mV typical dropout at full load - designed for permanent battery-connected automotive systems such as transceiver and on-board sensor supplies.

For engineers reviewing the TLS805B1LDVXUMA1 datasheet, TLS805B1LDVXUMA1 pinout, TLS805B1LDVXUMA1 application, or TLS805B1LDVXUMA1 equivalent, key selection criteria include ultra-low I_Q under cranking conditions, enable-controlled shutdown, thermal shutdown behavior, and stability with 1 µF ceramic output capacitor - all critical for always-on automotive subsystems.

Technical Context

The TLS805B1LDVXUMA1 implements a bandgap-referenced feedback loop with adjustable output via external resistor divider on the ADJ pin, enabling precise regulation across its extended 2.75 V–42 V input range - including operation during cold-crank (≤6 V). Its internal current-limit protection activates at ~100 mA and triggers overtemperature shutdown above 150°C junction temperature.

Stability is guaranteed with C_Q ≥ 1 µF and ESR ≤ 100 Ω; no input capacitor is required for stability but recommended for line transient suppression. The EN pin features integrated pull-down, requiring logic-high activation, and enables <1 µA shutdown current - essential for low-power wake-up architectures.

Key Specifications

Parameter	Value and Actual Design Meaning
Quiescent Current	5 µA typ. - enables >1-year battery standby in always-on automotive modules without drain.
Input Voltage Range	2.75 V to 42 V - supports full automotive battery range including cranking (≤6 V) and load dump (≤42 V).
Output Current	50 mA max - sufficient for powering CAN/LIN transceivers, Hall sensors, and microcontroller peripherals.
Dropout Voltage	100 mV typ. @ 50 mA - maintains regulation down to V_OUT + 0.1 V input, critical for low-V_IN operation.
Enable Threshold	V_EN(H) ≥ 1.5 V - compatible with 3.3 V and 5 V logic; internal pull-down ensures default-off state.
Thermal Shutdown	Activates at T_J > 150°C - protects against sustained overload or poor PCB heatsinking.
Output Capacitor	1 µF ceramic, ESR ≤ 100 Ω - minimal external BOM for stable regulation; no tantalum or electrolytic required.

Pinout & Package

Package: PG-DSO-8 (exposed pad, RoHS-compliant, AEC-Q100 qualified).

Pin/Terminal	Circuit Role	Design Meaning
1 (I)	Input	Main power input; accepts 2.75–42 V; requires local 100 nF decoupling to GND for noise immunity.
2 (N.C.)	No Connect	Internally unconnected; must remain floating - no PCB trace or solder mask opening required.
3 (EN)	Enable Control	Active-high logic input; internal pull-down ensures safe default-off; drives IC into <1 µA shutdown mode.
4 (GND)	Ground Reference	Primary return path for input, output, and internal circuitry; must be low-impedance connection to PCB ground plane.
5 (N.C.)	No Connect	Internally unconnected; electrically isolated - no routing or termination permitted.
6 (N.C.)	No Connect	Internally unconnected; mechanical pad only - no electrical function or thermal path.
7 (ADJ)	Output Voltage Adjustment	Feedback node for external resistor divider; sets V_OUT = V_REF × (1 + R1/R2), where V_REF = 1.25 V.
8 (Q)	Regulated Output	Delivers stable output voltage; requires 1 µF ceramic capacitor to GND within 3 mm of pin for stability.

Key Features

Feature	Design Value
Ultra-low I_Q	5 µA typ. - extends vehicle battery life in parked/standby modes without compromising wake-up responsiveness.
Extended Cranking Operation	Starts regulation at V_IN = 2.75 V - sustains supply to safety-critical sensors during engine start (<6 V battery).
Integrated Protection	Current limit (~100 mA) + thermal shutdown (>150°C) - prevents catastrophic failure during short-circuit or overheating.
Minimal External Components	Stable with single 1 µF ceramic C_OUT - reduces BOM cost, board space, and design validation effort.
AEC-Q100 Qualified	Grade 1 (-40°C to +125°C ambient) - validated for automotive powertrain, body, and chassis applications.

Applications

Transceiver Supply

On-Board Sensor Supply

Use Scenario: Powering LIN/CAN transceivers in gateways and domain controllers where bus remains active during sleep.

IC Role / Device Role / Timing Role: Primary 5 V or 3.3 V LDO supplying transceiver V_CC, with enable synchronized to network wake-up signals.

Use Value: 5 µA I_Q prevents parasitic drain; 2.75 V start-up ensures reliable communication during cranking.

Use Scenario: Supplying Hall-effect, pressure, or temperature sensors mounted directly on engine or chassis.

IC Role / Device Role / Timing Role: Local point-of-load regulator converting battery voltage to stable 5 V or 3.3 V for analog front-end and ADC reference.

Use Value: Wide input range handles load-dump transients; thermal shutdown protects against under-hood overheating.

Infotainment System Backup

RKE/Immobilizer Module

Use Scenario: Maintaining real-time clock, memory retention, and secure boot circuitry during ignition-off periods.

IC Role / Device Role / Timing Role: Always-on auxiliary LDO providing regulated 3.3 V to RTC, SRAM, and crypto controller.

Use Value: <1 µA off-mode current enables multi-year battery backup; AEC-Q100 qualification ensures reliability over vehicle lifetime.

Use Scenario: Powering remote keyless entry receivers and immobilizer challenge-response circuits in door modules.

IC Role / Device Role / Timing Role: Low-noise, enable-controlled regulator supplying MCU and RF front-end during periodic listen modes.

Use Value: Fast enable response (<10 µs) supports low-latency wake-up; 100 mV dropout preserves margin at low battery voltage.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-I_Q linear regulator applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLS855B1LDVXUMA1	Same PG-DSO-8 package, 3.3 V fixed output (vs. adjustable ADJ pin); identical I_Q, dropout, and protection features.	Eliminates external resistor divider; simplifies layout for fixed-voltage use cases like 3.3 V MCU cores.	Select when output voltage is fixed and board space for feedback resistors is constrained.
TLV73312PDBVR	TI part: 120 mA output, 3.8 µA I_Q, SOT-23-5 package; lacks AEC-Q100 qualification and cranking-range support (min V_IN = 1.4 V).	Suitable for non-automotive industrial IoT nodes; not rated for automotive temperature or reliability requirements.	Select only for cost-sensitive, non-automotive designs where AEC-Q100 and cranking operation are not required.

Compared with TLS855B1LDVXUMA1, this part offers design flexibility via adjustable output but requires two external resistors; versus TLV73312PDBVR, it delivers automotive-grade robustness and cranking capability at the expense of higher unit cost and larger footprint.

Availability

TLS805B1LDVXUMA1 is available at Aetrix Electronics and suitable for automotive infotainment backup, transceiver supply, and on-board sensor supply requiring stable component supply across extended temperature and voltage ranges.

Supply support for TLS805B1LDVXUMA1 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 OPTIREG™ linear regulator product line targets automotive power systems requiring ultra-low quiescent current, wide input range, and AEC-Q100 compliance - specifically for always-on, battery-connected subsystems.

FAQ

What is the minimum input voltage required for regulation?

The TLS805B1LDVXUMA1 begins regulation at 2.75 V input - enabling operation during automotive cranking events where battery voltage drops below 6 V. Below this threshold, output voltage tracks input minus dropout, down to zero. This extended low-V_IN capability is verified per AEC-Q100 stress testing and documented in the functional range table.

Can the ADJ pin be left unconnected for fixed-output operation?

No - the ADJ pin must be connected to a resistor divider between Q and GND to set output voltage; leaving it open causes undefined regulation or failure to regulate. The device has no internal fixed-reference path. For fixed-output alternatives, Infineon offers the pin-compatible TLS855B1LDVXUMA1 (3.3 V) and TLS825B1LDVXUMA1 (5.0 V).

Is an input capacitor mandatory for stable operation?

An input capacitor is not required for loop stability but is strongly recommended: a 100 nF ceramic capacitor placed close to the I pin suppresses high-frequency noise and line transients from the battery rail. Without it, conducted EMI may disrupt downstream circuitry, especially in CAN/LIN networks sharing the same power domain.

How does thermal shutdown behave under continuous overload?

Under sustained overload (e.g., output shorted), the device cycles between thermal shutdown and restart - causing junction temperature to exceed 150°C repeatedly. This oscillatory behavior degrades long-term reliability. Designers must ensure adequate PCB copper area (≥300 mm² heatsink) or derate output current to maintain T_J < 125°C continuously.

TLS805B1LDVXUMA1 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: OPTIREG™

Package/Case:: 10-TFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Adjustable

Number of Regulators:: 1

Voltage - Input (Max):: 42V

Voltage - Output (Min/Fixed):: 1.2V

Voltage - Output (Max):: 41.7V

Voltage Dropout (Max):: 0.3V @ 50mA

Current - Output:: 50mA

Current - Quiescent (Iq):: 1 µA

Current - Supply (Max):: 11 µA

PSRR:: 60dB (100Hz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Short Circuit

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: PG-TSON-10

TLS805B1LDVXUMA1 FAQ

1.How can I place an order for TLS805B1LDVXUMA1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TLS805B1LDVXUMA1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TLS805B1LDVXUMA1 reliable?

The price and inventory of TLS805B1LDVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLS805B1LDVXUMA1 is usually 5 days.

3.What payment methods are accepted for TLS805B1LDVXUMA1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLS805B1LDVXUMA1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TLS805B1LDVXUMA1?

TLS805B1LDVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TLS805B1LDVXUMA1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TLS805B1LDVXUMA1?

For technical support, including TLS805B1LDVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLS805B1LDVXUMA1 requirements.

6.How does Aetrix verify that TLS805B1LDVXUMA1 is sourced from the original manufacturer or authorized distributors?

All TLS805B1LDVXUMA1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TLS805B1LDVXUMA1 meets industry standards.

7.What is the process for return or replacement of TLS805B1LDVXUMA1?

All TLS805B1LDVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLS805B1LDVXUMA1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TLS805B1LDVXUMA1 part is unused and in its original packaging.

Return procedure for TLS805B1LDVXUMA1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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