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Infineon Technologies TLS203B0LDVXUMA1
- Part No.:
- TLS203B0LDVXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 10-TFDFN Exposed Pad
- Datasheet:
-
TLS203B0LDVXUMA1.pdf
- Description:
- IC REG LIN POS ADJ 300MA TSON-10
- Quantity:
- Payment:
- Shipping:
Inventory:1,708
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Product details
Overview
TLS203B0LDVXUMA1 from Infineon Technologies is a low-dropout, low-noise linear voltage post-regulator delivering 300 mA output current with 270 mV dropout at full load, ±2.5% output voltage accuracy over temperature and load, and 24 µVRMS noise (10 Hz–100 kHz) when used with a 10 nF bypass capacitor. It is qualified to AEC-Q100 Grade 0 (−40 °C to +125 °C) and designed for automotive battery-powered systems requiring stable 3.3 V supply after primary DC/DC conversion.
For engineers reviewing the TLS203B0LDVXUMA1 datasheet, TLS203B0LDVXUMA1 pinout, TLS203B0LDVXUMA1 application, or TLS203B0LDVXUMA1 equivalent, key selection criteria include ultra-low quiescent current (30 µA), reverse polarity protection, no external diode requirement, stability with ≥3.3 µF ceramic output capacitors, and PG-DSO-8 exposed-pad thermal performance.
Technical Context
The TLS203B0LDVXUMA1 implements a micropower bandgap reference with error amplifier feedback control, saturation-limited pass transistor drive, and integrated thermal shutdown and foldback current limiting. Its architecture supports Kelvin sense connection via SENSE pin for improved load regulation under PCB trace resistance.
It features internal reverse-battery protection that blocks reverse current flow from output to input during −20 V input faults, and includes EN-controlled shutdown with <1 µA leakage. The BYP pin enables reference bypassing to reduce noise without requiring external op-amps or complex filtering networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 3.3 V ±2.5% over −40 °C to +125 °C and full load range - ensures stable MCU/Sensor rail without external resistor network. |
| Dropout voltage | 270 mV at 300 mA - enables operation down to 3.57 V input while maintaining regulated 3.3 V output in cold-crank automotive conditions. |
| Output noise | 24 µVRMS (10 Hz–100 kHz) with 10 nF BYP capacitor - meets stringent analog sensor and ADC reference supply requirements. |
| Quiescent current | 30 µA typical - extends battery life in always-on automotive modules such as body control units and telematics. |
| Input voltage range | 3.8 V to 20 V - compatible with 12 V automotive battery systems including load-dump transients up to 20 V. |
| Shutdown current | <1 µA - enables deep-sleep mode in infotainment and ADAS subsystems without significant standby drain. |
| Thermal resistance (J-A) | 66 K/W with 300 mm² PCB copper heatsink - allows 300 mA continuous operation at +85 °C ambient without forced air. |
Pinout & Package
Package: PG-DSO-8 exposed-pad (RoHS-compliant, green product). Exposed pad (Pin 9) must be soldered to PCB ground plane and electrically tied to Pin 6 (GND) for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Q | Regulated output | Supplies 3.3 V to load; requires ≥3.3 µF output capacitor for stability; connects directly to SENSE in standard configuration. |
| 2 SENSE | Output voltage sense input | Enables Kelvin sensing to compensate for PCB trace IR drop; improves load regulation accuracy when routed to remote load point. |
| 3,7 NC | No connect | Internally unconnected; may be left floating or tied to GND per layout best practice - no functional impact. |
| 4 BYP | Bypass reference node | Accepts 10 nF capacitor to Q to reduce output noise; clamped to ±0.6 V internally; must remain unconnected if unused. |
| 5 EN | Enable control input | Active-high logic input; accepts 3.3 V/5 V TTL; pulls output off when low; requires pull-up if driven by open-collector gate. |
| 6 GND | Power ground reference | Primary ground return path; bottom of output divider (for adjustable variants) must connect here for optimal load regulation. |
| 8 I | Input supply | Accepts 3.8–20 V; reverse-polarity protected - blocks current flow during −20 V fault, protecting downstream circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Reverse polarity protection | Integrated MOSFET-based blocking prevents reverse current flow from Q to I during battery reversal - eliminates need for external series diode. |
| Low-noise architecture | Reference bypass capability reduces output noise to 24 µVRMS; enables clean power for precision analog circuits without LDO+LDO cascading. |
| Stability with ceramic capacitors | Operates stably with ≥3.3 µF X7R/X5R ceramic output caps - avoids ESR dependency and simplifies BOM vs. tantalum/aluminum alternatives. |
| Automotive qualification | AEC-Q100 Grade 0 qualified (−40 °C to +125 °C junction); validated for 15-year automotive service life under thermal cycling and humidity stress. |
| Thermal protection | Internal foldback current limiting and thermal shutdown activate at Tj >150 °C - prevents latch-up and permanent damage during overload or poor heatsinking. |
Applications
| Advanced Driver Assistance Systems (ADAS) | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: Powering radar sensor signal chain (LNA, ADC, clock buffer) in 77 GHz front-end module. IC Role / Device Role / Timing Role: Post-regulator supplying ultra-low-noise 3.3 V rail after buck converter, decoupling high-frequency switching noise. Use Value: 24 µVRMS noise ensures SNR preservation in RF receiver path; 300 mA headroom supports burst-mode radar transmission peaks. |
Use Scenario: Providing regulated 3.3 V to microcontroller, CAN transceiver, and door-lock actuator drivers in centralized BCM. IC Role / Device Role / Timing Role: Always-on LDO maintaining real-time clock and wake-up logic during vehicle sleep mode. Use Value: 30 µA quiescent current minimizes parasitic drain on 12 V battery; reverse polarity protection safeguards against jump-start faults. |
| Infotainment Head Unit | Electric Power Steering (EPS) ECU |
|
Use Scenario: Supplying audio codec and touch controller in center-stack display unit with strict EMC and noise limits. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating sensitive analog audio paths from noisy digital SoC rails. Use Value: BYP pin bypassing suppresses broadband noise coupling into audio DAC reference; fixed 3.3 V eliminates resistor tolerance drift. |
Use Scenario: Delivering fault-tolerant 3.3 V to torque sensor interface and motor control MCU in EPS safety-critical domain. IC Role / Device Role / Timing Role: Safety-relevant power supervisor with overtemperature and overcurrent protection enabled by internal monitoring. Use Value: AEC-Q100 qualification and thermal shutdown ensure compliance with ISO 26262 ASIL-B requirements; no external protection components needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE42744G | Higher quiescent current (70 µA), higher dropout (350 mV), same 3.3 V fixed output and AEC-Q100 Grade 0 rating. | Lacks BYP pin and Kelvin sense; less suitable for ultra-low-noise sensor rails but more robust under high-ESR capacitor conditions. | Select when cost sensitivity outweighs noise performance and board space permits larger output caps. |
| TLV73333PDBVR | Lower IQ (45 µA), lower max current (300 mA), no reverse polarity protection, not AEC-Q100 qualified. | Intended for industrial/commercial use only; lacks automotive transient immunity and long-term reliability validation. | Select only for non-automotive prototypes or secondary non-safety rails where qualification is not required. |
Compared with TLE42744G and TLV73333PDBVR, TLS203B0LDVXUMA1 uniquely combines AEC-Q100 Grade 0, 24 µVRMS noise, reverse polarity protection, and Kelvin sense in a single PG-DSO-8 package - making it the only choice for noise-sensitive, safety-relevant automotive post-regulation.
Availability
TLS203B0LDVXUMA1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), automotive body control modules (BCM), and electric power steering (EPS) ECUs requiring stable component supply across extended automotive lifecycles.
Supply support for TLS203B0LDVXUMA1 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 R&D infrastructure.
This device belongs to the OPTIREG™ linear regulator product line, engineered specifically for automotive post-regulation tasks where low noise, reverse protection, and AEC-Q100 reliability are mandatory - not general-purpose LDO use.
FAQ
Can TLS203B0LDVXUMA1 operate with input voltage below 3.8 V?
No. The datasheet specifies a minimum functional input voltage of 3.8 V for the fixed 3.3 V variant (TLS203B0EJ V33). Below this, regulation cannot be guaranteed due to insufficient headroom for the internal reference and error amplifier biasing. Operation at 3.5 V may result in unregulated output or dropout behavior.
Is an input capacitor required for TLS203B0LDVXUMA1?
Yes - an input capacitor (1–10 µF ceramic) is required if the device is placed >15 cm from the main battery filter capacitor or if input trace inductance is non-negligible. This prevents instability and voltage spikes during load transients, especially in automotive wiring harness environments.
What is the maximum allowable PCB copper area for the exposed pad?
The exposed pad (Pin 9) should be connected to a minimum 300 mm² copper pour on the top layer, thermally coupled to inner ground planes via ≥4 thermal vias (0.3 mm diameter). Larger areas (600 mm²) further reduce RthJA to 52 K/W, enabling higher ambient temperature operation at full 300 mA load.
Does TLS203B0LDVXUMA1 support adjustable output voltage?
No. TLS203B0LDVXUMA1 is the fixed 3.3 V version (TLS203B0EJ V33). The adjustable variant is TLS203B0EJV (marking 203B0V), which uses the ADJ pin and external resistor divider. Pin 2 on TLS203B0LDVXUMA1 is SENSE, not ADJ - swapping variants requires PCB redesign.
TLS203B0LDVXUMA1 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):
- 20V
- Voltage - Output (Min/Fixed):
- 1.22V
- Voltage - Output (Max):
- 20V
- Voltage Dropout (Max):
- 0.4 @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 12 mA
- PSRR:
- 65dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TSON-10
TLS203B0LDVXUMA1 FAQ
1.How can I place an order for TLS203B0LDVXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLS203B0LDVXUMA1 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 TLS203B0LDVXUMA1 reliable?
The price and inventory of TLS203B0LDVXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLS203B0LDVXUMA1 is usually 5 days.
3.What payment methods are accepted for TLS203B0LDVXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLS203B0LDVXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLS203B0LDVXUMA1?
TLS203B0LDVXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLS203B0LDVXUMA1 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 TLS203B0LDVXUMA1?
For technical support, including TLS203B0LDVXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLS203B0LDVXUMA1 requirements.
6.How does Aetrix verify that TLS203B0LDVXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLS203B0LDVXUMA1 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 TLS203B0LDVXUMA1 meets industry standards.
7.What is the process for return or replacement of TLS203B0LDVXUMA1?
All TLS203B0LDVXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLS203B0LDVXUMA1, 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 TLS203B0LDVXUMA1 part is unused and in its original packaging.
Return procedure for TLS203B0LDVXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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