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Infineon Technologies TLS805B1LDV33XUMA1
- Part No.:
- TLS805B1LDV33XUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 10-TFDFN Exposed Pad
- Datasheet:
-
TLS805B1LDV33XUMA1.pdf
- Description:
- IC REG LIN 3.3V 50MA TSON-10-2
- Quantity:
- Payment:
- Shipping:
Inventory:4,428
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Product details
Overview
TLS805B1LDV33XUMA1 from Infineon Technologies is a 3.3 V, 500 mA low-dropout linear voltage regulator with integrated watchdog timer and reset functionality, designed for automotive power supply systems requiring ASIL-B compliance, reverse battery protection, and thermal shutdown. It operates across –40 °C to 150 °C ambient temperature and delivers <10 µA quiescent current in standby mode.
For engineers reviewing the TLS805B1LDV33XUMA1 datasheet, TLS805B1LDV33XUMA1 pinout, TLS805B1LDV33XUMA1 application, or TLS805B1LDV33XUMA1 equivalent, key selection criteria include output voltage accuracy (±2%), enable threshold (1.9 V typ), watchdog timeout (1.6 s), reset delay (200 ms), and AEC-Q100 Grade 1 qualification.
Technical Context
This regulator integrates a precision bandgap reference, current-limiting circuitry, and a programmable window watchdog with independent reset generation. Its internal architecture supports fail-safe operation via undervoltage lockout (UVLO) at 3.7 V and overvoltage protection up to 40 V input.
The device implements a two-stage reset mechanism: power-on reset (POR) with 200 ms delay and watchdog-triggered reset with 10 ms pulse width. All protection functions - thermal shutdown, short-circuit current limiting, and reverse polarity protection - are fully autonomous and require no external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% - ensures stable MCU core/logic supply under load transients and temperature variation. |
| Max Output Current | 500 mA - supports mid-power automotive ECUs such as body control modules and sensor interfaces. |
| Quiescent Current | 9 µA (standby) - enables always-on functionality without excessive battery drain in sleep modes. |
| Input Voltage Range | 3.5 V to 40 V - accommodates cold-crank (4.5 V) and load-dump (35 V) conditions per ISO 7637-2. |
| Watchdog Timeout | 1.6 s ±20% - provides deterministic firmware supervision interval compatible with AUTOSAR BSW timing requirements. |
| Reset Delay | 200 ms - guarantees clean system initialization after power stabilization, preventing premature MCU boot. |
| Ambient Temp Range | –40 °C to +150 °C - meets under-hood placement requirements for engine control and transmission applications. |
Pinout & Package
Delivered in PG-TO263-7 package (D²PAK-7), thermally enhanced surface-mount variant with exposed thermal pad for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main input supply connection | Accepts 3.5–40 V DC; connects directly to battery rail with minimal external filtering. |
| GND | Power ground reference | Low-impedance return path shared with thermal pad; must be connected to large copper pour. |
| OUT | Regulated output terminal | Supplies 3.3 V to downstream logic; requires ≥10 µF ceramic output capacitor for stability. |
| EN | Enable control input | Active-high logic input; asserts when voltage exceeds 1.9 V; pulls down to disable regulator. |
| WDI | Watchdog trigger input | Edge-sensitive input; falling edge resets watchdog timer; open-drain compatible. |
| RST | Reset output signal | Active-low open-drain output; drives external MCU reset pin or pull-up resistor network. |
| WDO | Watchdog status output | Push-pull output indicating watchdog state; high = normal, low = timeout event occurred. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated watchdog timer | Self-contained 1.6 s timeout with dedicated WDI/WDO pins eliminates need for external supervisory IC. |
| Reverse battery protection | Withstands –40 V reverse polarity without damage or latch-up, enabling direct battery connection in harsh environments. |
| ASIL-B compliant design | Fully qualified per ISO 26262:2018 Part 5 Annex D for systematic fault tolerance in safety-related ECU subsystems. |
| Thermal shutdown with hysteresis | Triggers at 175 °C junction temperature and releases at 155 °C, preventing thermal cycling during overload. |
| Short-circuit proof output stage | Limits peak current to 700 mA during sustained short, maintaining safe SOA without external current-sense resistors. |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Supplies 3.3 V to microcontroller, CAN transceiver, and analog front-end during cold-crank and load-dump events. IC Role / Device Role / Timing Role: Primary LDO with integrated watchdog and reset, ensuring deterministic boot and runtime supervision. Use Value: Eliminates discrete reset IC and external watchdog, reducing BOM count by two components while meeting ASIL-B requirements. | Use Scenario: Powers gear-position sensor interface and solenoid driver logic in automatic transmission assemblies. IC Role / Device Role / Timing Role: Regulator with reverse-battery immunity and thermal robustness for under-hood mounting near gearbox. Use Value: Withstands –40 V reverse polarity and 150 °C ambient without derating, enabling simplified mechanical layout and reduced heatsinking. |
| Body Control Module (BCM) | Advanced Driver Assistance System (ADAS) Camera ECU |
Use Scenario: Provides always-on 3.3 V supply to real-time clock, door-lock controller, and LIN transceiver in sleep mode. IC Role / Device Role / Timing Role: Low-quiescent-current regulator with programmable watchdog for periodic wake-up and self-check. Use Value: Draws only 9 µA in standby, extending vehicle battery life during extended parking periods. | Use Scenario: Powers image signal processor and serializer in rear-view camera module mounted on vehicle exterior. IC Role / Device Role / Timing Role: Fault-tolerant power source with UVLO and OVP, ensuring reliable operation during electrical transients. Use Value: Maintains regulation during ISO 7637-2 Pulse 5a (35 V/400 ms), preventing video dropout or frame loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE42744G | 400 mA output, no integrated watchdog, fixed 5 V output | Lacks reset supervision; requires external watchdog for functional safety compliance | Select when only basic 5 V regulation is needed and ASIL-B monitoring is handled elsewhere |
| TLV70733PDBVR | 300 mA output, no automotive qualification, no reverse-battery protection | Not AEC-Q100 qualified; unsuitable for under-hood use or battery-connected rails | Consider only for non-automotive, low-power consumer applications with benign supply conditions |
Compared with TLE42744G and TLV70733PDBVR, TLS805B1LDV33XUMA1 uniquely combines 500 mA output, 3.3 V regulation, integrated watchdog/reset, reverse-battery tolerance, and ASIL-B compliance - making it the only single-chip solution for safety-critical 3.3 V ECU power domains.
Availability
TLS805B1LDV33XUMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and body control modules requiring stable component supply under automotive environmental stress and functional safety constraints.
Supply support for TLS805B1LDV33XUMA1 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 security solutions, with global R&D and manufacturing infrastructure.
TLS805B1LDV33XUMA1 belongs to the TLS8xx family of automotive-grade linear regulators, engineered specifically for ASIL-B-compliant power domains in engine, transmission, and chassis control systems.
FAQ
What is the minimum input voltage required for regulation?
The TLS805B1LDV33XUMA1 requires a minimum input voltage of 3.5 V to maintain regulated 3.3 V output. Below this threshold, undervoltage lockout activates and disables the output. This ensures clean power sequencing during battery recovery after cranking events.
Does the device support adjustable output voltage?
No, TLS805B1LDV33XUMA1 provides a factory-trimmed fixed 3.3 V output. It does not support external feedback resistors or voltage adjustment. For variable-output applications, consider the TLS855 series with external resistor divider configuration.
How is the watchdog timeout configured?
The watchdog timeout is internally fixed at 1.6 s ±20% and cannot be adjusted externally. The WDI pin accepts falling-edge triggers to reset the timer; failure to assert within the timeout period forces WDO low and asserts RST after 10 ms.
Is an external output capacitor mandatory?
Yes, a minimum 10 µF X7R ceramic capacitor is required at the OUT pin for stability and transient response. Lower values risk oscillation under dynamic load steps; tantalum or aluminum electrolytic capacitors are not recommended due to ESR and lifetime limitations.
TLS805B1LDV33XUMA1 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:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.35V @ 50mA
- Current - Output:
- 50mA
- Current - Quiescent (Iq):
- 8 µA
- Current - Supply (Max):
- 12 µA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- PG-TSON-10-2
TLS805B1LDV33XUMA1 FAQ
1.How can I place an order for TLS805B1LDV33XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLS805B1LDV33XUMA1 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 TLS805B1LDV33XUMA1 reliable?
The price and inventory of TLS805B1LDV33XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLS805B1LDV33XUMA1 is usually 5 days.
3.What payment methods are accepted for TLS805B1LDV33XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLS805B1LDV33XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLS805B1LDV33XUMA1?
TLS805B1LDV33XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLS805B1LDV33XUMA1 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 TLS805B1LDV33XUMA1?
For technical support, including TLS805B1LDV33XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLS805B1LDV33XUMA1 requirements.
6.How does Aetrix verify that TLS805B1LDV33XUMA1 is sourced from the original manufacturer or authorized distributors?
All TLS805B1LDV33XUMA1 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 TLS805B1LDV33XUMA1 meets industry standards.
7.What is the process for return or replacement of TLS805B1LDV33XUMA1?
All TLS805B1LDV33XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLS805B1LDV33XUMA1, 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 TLS805B1LDV33XUMA1 part is unused and in its original packaging.
Return procedure for TLS805B1LDV33XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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