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Infineon Technologies TLS208D1EJV33XUMA1
- Part No.:
- TLS208D1EJV33XUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLS208D1EJV33XUMA1.pdf
- Description:
- IC REG LIN 3.3V 800MA 8DSO E-PAD
- Quantity:
- Payment:
- Shipping:
Inventory:1,251
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Product details
Overview
TLS208D1EJV33XUMA1 from Infineon Technologies is a fixed-output (3.3 V), AEC-Q100 qualified linear voltage post regulator for automotive DC-DC cascaded power systems. It delivers up to 800 mA output current with ±2 % output accuracy, 400 mV typical dropout at 400 mA, and operates across 2.7–18 V input range. Designed as a secondary regulator after buck converters in engine control units and ADAS domain controllers.
For engineers reviewing the TLS208D1EJV33XUMA1 datasheet, TLS208D1EJV33XUMA1 pinout, TLS208D1EJV33XUMA1 application, or TLS208D1EJV33XUMA1 equivalent, key selection criteria include its integrated undervoltage reset with adjustable threshold, 62 dB PSRR at 10 kHz, -40 °C to +150 °C junction temperature rating, and PG-DSO-8 (exposed pad) package thermal performance.
Technical Context
The TLS208D1EJV33XUMA1 implements a bandgap-referenced LDO architecture with internal current limiting and thermal shutdown. Its feedback (FB) pin is internally tied to a precision 3.3 V reference, eliminating external resistor dividers required in adjustable versions.
It integrates an open-collector reset output (RO) with programmable threshold via RADJ pin and an active-high enable (EN) input. The device requires only two external capacitors - 220 nF at input (I) and ≥1 µF low-ESR ceramic at output (Q) - for stable operation across its full -40 °C to +150 °C temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2 % - eliminates need for external feedback resistors and ensures compliance with MCU I/O supply requirements. |
| Max Output Current | 800 mA - supports dual-core automotive microcontrollers and CAN transceivers without derating at 125 °C ambient. |
| Dropout Voltage | 400 mV typ. at 400 mA - enables regulation from 3.7 V input (e.g., post-buck 5 V rail) down to 3.3 V under full load. |
| PSRR | 62 dB typ. at 10 kHz - suppresses switching noise from upstream DC-DC converters feeding safety-critical sensors. |
| Quiescent Current | 90 µA typ. - minimizes standby power loss in always-on vehicle networks (e.g., LIN gateway wake-up circuits). |
| Reset Threshold | Adjustable via external resistor divider on RADJ - allows precise brown-out detection aligned to downstream logic voltage thresholds. |
| Operating Temp | -40 °C to +150 °C junction - validated for under-hood placement in transmission control modules and battery management systems. |
Pinout & Package
Package: PG-DSO-8 (Exposed Pad), RoHS-compliant, thermally enhanced surface-mount package with exposed die pad soldered to PCB ground plane for RthJC = 9.5 K/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 I | Input Supply | Accepts 2.7–18 V; requires 220 nF decoupling capacitor placed adjacent to pin for line transient immunity. |
| 2 N.C. | No Connect | Internally unconnected; must remain floating or grounded per layout guidelines - no routing or vias allowed. |
| 3 GND | Ground Reference | Main return path; must be low-impedance connection to system ground plane and exposed pad thermal slug. |
| 4 EN | Enable Input | Active-high logic; drives internal pass transistor - tie to I for always-on operation or control via microcontroller GPIO. |
| 5 RO | Reset Output | Open-drain output; requires external pull-up to monitored logic rail (e.g., 3.3 V) to signal MCU reset condition. |
| 6 RADJ | Reset Threshold Adjust | Connects to resistor divider between Q and GND; sets reset assertion point (e.g., 2.97 V for 3.3 V ±10 % tolerance). |
| 7 FB | Feedback Input | Internally connected to 3.3 V reference; must be shorted directly to Q pin - no external components permitted. |
| 8 Q | Regulated Output | Delivers 3.3 V @ up to 800 mA; requires ≥1 µF ceramic capacitor with ESR ≤10 Ω at 10 kHz for loop stability. |
| EP | Exposed Pad | Thermal and electrical connection to GND; must be soldered to ≥300 mm² copper area with ≥6 thermal vias for RthJA ≤66 K/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Undervoltage Reset | Programmable reset threshold (via RADJ) with 100 µs delay - enables deterministic system boot sequencing in ECU power-up routines. |
| High PSRR at Switching Frequencies | 62 dB at 10 kHz - rejects ripple from 100–500 kHz buck converters used in automotive body control modules. |
| Automotive Thermal Robustness | Guaranteed operation up to +150 °C junction - supports placement near power MOSFETs in motor drive inverters. |
| Low Quiescent Current | 90 µA typical - extends battery life in parked vehicle scenarios where microcontrollers remain in low-power sleep mode. |
| Output Short-Circuit Protection | Current-limited foldback with auto-recovery - sustains indefinite short-circuit without latch-up or damage during assembly testing. |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
|
Use Scenario: Supplies 3.3 V to 32-bit TriCore™ microcontroller and analog front-end ADCs in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Post-regulator providing clean, low-noise power after primary 5 V buck converter; synchronizes reset assertion with crank-to-run transition. Use Value: ±2 % output accuracy ensures ADC reference stability; 62 dB PSRR prevents switching noise from corrupting knock sensor measurements. |
Use Scenario: Powers image signal processor (ISP) and radar transceiver SoCs in forward-facing camera and 77 GHz radar modules. IC Role / Device Role / Timing Role: Secondary LDO delivering regulated 3.3 V from 5 V domain; RO pin triggers SoC reset upon detected brown-out during cold cranking. Use Value: -40 °C to +150 °C operation enables under-hood mounting; adjustable RADJ allows reset alignment to ISP core voltage tolerance. |
| Electric Power Steering (EPS) | Body Control Module (BCM) |
|
Use Scenario: Provides 3.3 V bias to torque sensor interface and motor gate driver logic in column-assist EPS systems. IC Role / Device Role / Timing Role: Safety-critical post-regulator with overtemperature shutdown; EN pin controlled by main MCU to disable power during fault conditions. Use Value: 800 mA output supports dual gate drivers; thermal shutdown at 165 °C prevents thermal runaway during sustained assist events. |
Use Scenario: Supplies 3.3 V to LIN transceivers, door lock actuators, and ambient light sensors in centralized body electronics. IC Role / Device Role / Timing Role: Always-on LDO with 90 µA quiescent current; RO pin signals BCM microcontroller when battery voltage drops below 9 V during start-stop cycles. Use Value: Low IQ extends parasitic drain below 100 µA; PG-DSO-8 footprint enables compact layout in space-constrained door modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear post-regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73333PDBVR | 300 mA max output, 250 mV dropout, no reset function, SOT-23-5 package | Lacks integrated reset and thermal shutdown; limited to non-safety applications like infotainment USB ports | Select only for cost-sensitive, non-AEC-Q100 designs with <300 mA load and no brown-out monitoring requirement |
| TPS7B8733QKVURQ1 | 500 mA max output, 300 mV dropout, fixed 3.3 V, AEC-Q100, no adjustable reset | Includes watchdog timer but no user-adjustable reset threshold; smaller 3 mm × 3 mm VSON package | Prefer when board space is constrained and fixed-reset threshold (e.g., 2.97 V) suffices for all target MCUs |
Compared with TLV73333PDBVR and TPS7B8733QKVURQ1, TLS208D1EJV33XUMA1 uniquely combines 800 mA output, programmable reset, and PG-DSO-8 thermal performance - making it optimal for high-current, safety-critical automotive domains requiring field-configurable brown-out response.
Availability
TLS208D1EJV33XUMA1 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, electric power steering systems, and body control modules requiring stable component supply across extended automotive lifecycles.
Supply support for TLS208D1EJV33XUMA1 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 industrial control solutions, with global manufacturing and AEC-Q100 validation infrastructure.
This device belongs to the TLS208D1 linear post-regulator product line, engineered specifically for automotive power architectures where cascaded regulation, functional safety, and extreme temperature resilience are mandatory.
FAQ
What is the minimum input voltage required for regulation at full 800 mA load?
The TLS208D1EJV33XUMA1 requires a minimum input voltage of 3.7 V to maintain 3.3 V output at 800 mA, based on its maximum dropout specification of 400 mV at 400 mA and confirmed derating curve showing ~500 mV dropout at 800 mA. Below 3.7 V, output voltage will drop proportionally.
Can the RO pin drive a 5 V logic input directly?
No - the RO pin is an open-collector output rated for max 5.5 V but designed to sink current into a pull-up resistor tied to the target logic rail. To interface with a 5 V MCU input, connect a 10 kΩ pull-up resistor from RO to 5 V and verify the MCU's input high threshold is ≤4.0 V, as RO's saturation voltage is ≤0.4 V at 1 mA sink current.
Is the FB pin accessible for external feedback modification?
No - the TLS208D1EJV33XUMA1 is the fixed 3.3 V version; its FB pin is internally connected to the precision voltage reference and must be shorted directly to the Q (output) pin. External resistor dividers or compensation networks on FB are not supported and will cause regulation failure.
How does thermal performance change if the exposed pad is not soldered?
Without soldering the exposed pad to a thermal copper area, RthJA degrades from 42 K/W (2s2p board) to 150 K/W (footprint-only), reducing maximum continuous output current from 800 mA to ~220 mA at 85 °C ambient. Full thermal performance requires ≥6 thermal vias connecting EP to inner ground plane.
TLS208D1EJV33XUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1V @ 800mA
- Current - Output:
- 800mA
- Current - Quiescent (Iq):
- 170 µA
- Current - Supply (Max):
- 250 µA
- PSRR:
- 62dB (10kHz)
- Control Features:
- Enable, Reset
- 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-DSO-8
TLS208D1EJV33XUMA1 FAQ
1.How can I place an order for TLS208D1EJV33XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLS208D1EJV33XUMA1 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 TLS208D1EJV33XUMA1 reliable?
The price and inventory of TLS208D1EJV33XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLS208D1EJV33XUMA1 is usually 5 days.
3.What payment methods are accepted for TLS208D1EJV33XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLS208D1EJV33XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLS208D1EJV33XUMA1?
TLS208D1EJV33XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLS208D1EJV33XUMA1 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 TLS208D1EJV33XUMA1?
For technical support, including TLS208D1EJV33XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLS208D1EJV33XUMA1 requirements.
6.How does Aetrix verify that TLS208D1EJV33XUMA1 is sourced from the original manufacturer or authorized distributors?
All TLS208D1EJV33XUMA1 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 TLS208D1EJV33XUMA1 meets industry standards.
7.What is the process for return or replacement of TLS208D1EJV33XUMA1?
All TLS208D1EJV33XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLS208D1EJV33XUMA1, 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 TLS208D1EJV33XUMA1 part is unused and in its original packaging.
Return procedure for TLS208D1EJV33XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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