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Infineon Technologies TLE4254EJSXUMA1
- Part No.:
- TLE4254EJSXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLE4254EJSXUMA1.pdf
- Description:
- IC REG LINEAR POS ADJ 70MA 8DSO
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
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Product details
Overview
TLE4254EJSXUMA1 from Infineon Technologies is a high-accuracy, low-dropout voltage tracking regulator in PG-DSO-8 exposed pad package, delivering 70 mA output current with ±1.5% output tracking tolerance to reference, 0.2 V typical dropout at full load, and operation across -40 °C to 150 °C junction temperature. It serves as a precision auxiliary supply for automotive sensors in powertrain systems, tracking a main regulator's output (e.g., 5 V) under harsh battery-supplied conditions.
For engineers reviewing the TLE4254EJSXUMA1 datasheet, TLE4254EJSXUMA1 pinout, TLE4254EJSXUMA1 application, or TLE4254EJSXUMA1 equivalent, key selection criteria include its open-collector status output for fault indication, adjustable tracking ratio down to 2.0 V reference, reverse-polarity input protection, short-circuit protection to GND/battery, and AEC-Q100 qualification for automotive use.
Technical Context
The TLE4254EJSXUMA1 implements a precision tracking architecture where the output voltage Q follows an external reference applied to EN/ADJ with high fidelity-typical tracking error ±1.5% over temperature and line/load variations. Its internal error amplifier compares the reference against feedback (via ST pin logic or direct connection), enabling proportional scaling of output relative to reference.
This version integrates an open-collector status (ST) output that asserts low during overvoltage, undervoltage, or short-circuit faults at Q. Protection circuitry includes thermal shutdown, reverse-polarity input clamping, and short-circuit current limiting to GND and battery rails-enabling robust operation in 12 V/24 V automotive electrical systems with transients up to ±45 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 70 mA maximum-sufficient to power off-board Hall-effect or pressure sensors without external buffering. |
| Tracking accuracy | ±1.5% typical over -40 °C to 150 °C-ensures stable sensor biasing even under engine bay thermal stress. |
| Dropout voltage | 0.2 V typ. @ 70 mA-enables regulation from 5.2 V input when tracking a 5.0 V reference, minimizing power loss. |
| Input voltage range | -20 V to +45 V-covers automotive load-dump (ISO 7637-2 Pulse 5a) and reverse-battery (-14 V) fault conditions. |
| Status output | Open-collector ST pin-drives low during output fault; requires external pull-up for microcontroller interrupt or diagnostic flag. |
| Reference input range | 2.0 V to 45 V on EN/ADJ-supports direct connection to main LDO outputs or resistor-divided battery monitoring signals. |
| Output capacitor | Stable with ≥1 µF ceramic-reduces BOM cost and PCB area vs. electrolytic or tantalum alternatives. |
Pinout & Package
Package: PG-DSO-8 exposed pad (RoHS-compliant, thermally enhanced). Exposed pad must be soldered to PCB ground plane for thermal performance (RthJC = 15 K/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 Q | Tracker output | Regulated output node; connect 1 µF ceramic capacitor directly to GND with low-ESR layout. |
| 2, 3, 7 n.c. | No-connect | Internally unused; recommended to tie to GND for mechanical stability and EMI control. |
| 4 ST | Status output | Open-collector fault indicator-pulls low during output over/undervoltage or short-circuit; requires external pull-up resistor. |
| 5 EN/ADJ | Adjust/enable input | Reference voltage input; high >2.0 V enables regulation; low disables IC and reduces quiescent current to <10 µA. |
| 6 GND | Ground reference | Main signal and thermal return; interconnect all GND pins and expose pad to large copper pour. |
| 8 I | Input supply | Battery-connected input; decouple with local ceramic capacitor to suppress line transients. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified per Grade 0 (-40 °C to +150 °C), enabling use in engine control units and transmission modules without derating. |
| Reverse-polarity protection | Withstands -20 V input indefinitely-eliminates need for external series diode in battery-reversal-prone installations. |
| Short-circuit protection | Self-limiting current to ~120 mA during Q-to-GND or Q-to-battery shorts-prevents thermal runaway and system latch-up. |
| Low OFF-mode current | <10 µA typical at EN/ADJ < 0.5 V-extends battery life in always-on vehicle subsystems like body controllers. |
| Thermal shutdown | Activates at Tj ≈ 165 °C with hysteresis-protects die during sustained overload while allowing automatic recovery after cooling. |
Applications
| Engine Coolant Temperature Sensor Supply | Transmission Oil Pressure Sensor Bias |
|---|---|
|
Use Scenario: Powers analog-output NTC-based coolant temperature sensor in close proximity to engine block under cyclic thermal stress. IC Role / Device Role / Timing Role: Precision tracking regulator-mirrors main ECU 5 V rail with ±1.5% accuracy to maintain sensor bridge excitation stability. Use Value: Eliminates calibration drift caused by reference voltage variation; enables <±1 °C temperature measurement accuracy over full operating range. |
Use Scenario: Supplies piezoresistive oil pressure sensor in automatic transmission control module exposed to vibration and wide ambient swings. IC Role / Device Role / Timing Role: Fault-monitored auxiliary regulator-ST pin alerts MCU to sensor short/open faults before hydraulic failure occurs. Use Value: Reduces diagnostic latency by 100 ms vs. software-only monitoring; supports ISO 26262 ASIL-B functional safety requirements. |
| Brake-by-Wire Wheel Speed Sensor Interface | Exhaust Gas Recirculation (EGR) Valve Position Feedback |
|
Use Scenario: Provides clean, regulated bias to active wheel speed sensor ICs in ABS/ESC modules subject to severe EMI and battery ripple. IC Role / Device Role / Timing Role: Low-noise tracking LDO-rejects input ripple via high PSRR (>60 dB @ 100 Hz) and tight output regulation. Use Value: Prevents false zero-crossing detection in magnetic sensors; maintains <0.1% speed measurement linearity at 0–200 km/h. |
Use Scenario: Supplies potentiometric position sensor in EGR valve actuator assembly operating continuously at elevated under-hood temperatures. IC Role / Device Role / Timing Role: High-temp-stable regulator-maintains 5.0 V output within ±20 mV from -40 °C to 150 °C junction temperature. Use Value: Enables closed-loop EGR control accuracy of ±1.5% valve opening-critical for NOx emissions compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive tracking regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV71718PDRVR | Fixed 1.8 V output; no tracking capability; 150 mA output; no status pin; not AEC-Q100 qualified. | Limited to fixed-voltage biasing of low-power MCUs-not suitable for reference-tracking sensor supplies. | Select only for non-automotive, fixed-VOUT applications where tracking and fault reporting are unnecessary. |
| MAX1725EUT+T | Fixed 3.3 V output; 250 mA; no tracking; no status output; AEC-Q100 Grade 2 (–40°C to +105°C) only. | Insufficient temperature rating for under-hood placement; lacks ST pin for diagnostics. | Acceptable only for cabin or chassis modules with lower thermal demands and no fault-reporting requirement. |
Compared with TLV71718PDRVR and MAX1725EUT+T, TLE4254EJSXUMA1 uniquely combines adjustable tracking, integrated fault signaling, AEC-Q100 Grade 0 qualification, and reverse-polarity resilience-making it the sole choice for safety-critical, high-temperature automotive sensor biasing where reference fidelity and diagnostics are mandatory.
Availability
TLE4254EJSXUMA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and brake-by-wire systems requiring stable component supply with full automotive qualification and traceable sourcing.
Supply support for TLE4254EJSXUMA1 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 quality certification to IATF 16949.
The TLE4254 belongs to Infineon's OPTIREG™ linear family-designed specifically for high-reliability automotive power supply applications demanding precision tracking, extended temperature operation, and integrated fault protection.
FAQ
What is the function of the ST pin on TLE4254EJSXUMA1?
The ST (Status) pin is an open-collector output that pulls low during output overvoltage, undervoltage, or short-circuit conditions. It requires an external pull-up resistor to a positive rail (e.g., 5 V or 3.3 V) and provides real-time hardware-level fault indication to a microcontroller GPIO or interrupt pin-enabling immediate diagnostic response without software polling.
Can TLE4254EJSXUMA1 track a reference voltage below 2.0 V?
No. The EN/ADJ input has a minimum functional reference voltage of 2.0 V per the datasheet's functional range (Table 4, P_4.2.5). Applying less than 2.0 V disables regulation and forces the device into shutdown mode with <10 µA quiescent current-intended for low-power sleep states, not sub-2 V tracking.
Is the exposed pad on the PG-DSO-8 package electrically connected?
Yes-the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. It serves as both a thermal path (RthJC = 15 K/W) and an electrical ground terminal. Leaving it unconnected degrades thermal performance by >3× and risks exceeding junction temperature limits under 70 mA load.
How does TLE4254EJSXUMA1 handle reverse battery connection?
The device incorporates integrated reverse-polarity protection on the I pin, allowing it to withstand -20 V input indefinitely without damage or latch-up. This eliminates the need for an external series diode or MOSFET reverse-protection circuit-reducing BOM count, forward voltage drop, and board space in automotive battery-connected designs.
TLE4254EJSXUMA1 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:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- Tracking
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 70mA
- Current - Output:
- 70mA
- Current - Quiescent (Iq):
- 80 µA
- Current - Supply (Max):
- 15 mA
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-8
TLE4254EJSXUMA1 FAQ
1.How can I place an order for TLE4254EJSXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4254EJSXUMA1 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 TLE4254EJSXUMA1 reliable?
The price and inventory of TLE4254EJSXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4254EJSXUMA1 is usually 5 days.
3.What payment methods are accepted for TLE4254EJSXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4254EJSXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4254EJSXUMA1?
TLE4254EJSXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4254EJSXUMA1 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 TLE4254EJSXUMA1?
For technical support, including TLE4254EJSXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4254EJSXUMA1 requirements.
6.How does Aetrix verify that TLE4254EJSXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLE4254EJSXUMA1 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 TLE4254EJSXUMA1 meets industry standards.
7.What is the process for return or replacement of TLE4254EJSXUMA1?
All TLE4254EJSXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4254EJSXUMA1, 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 TLE4254EJSXUMA1 part is unused and in its original packaging.
Return procedure for TLE4254EJSXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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