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Infineon Technologies TLT125D0EJXUMA1
- Part No.:
- TLT125D0EJXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLT125D0EJXUMA1.pdf
- Description:
- IC REG LIN POS ADJ 250MA DSO8-52
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
TLT125D0EJXUMA1 from Infineon is a high-precision AEC-Q100 Grade 1 linear voltage tracking regulator in PG-DSO-8 exposed pad package, delivering 250 mA output with ±0.5% tracking accuracy, 250 mV typical dropout at full load, and operation across -40°C to 160°C junction temperature. It tracks an external reference voltage applied to ADJ (2.0 V–14 V range) and serves as protected off-board sensor supply in powertrain ECUs.
For engineers reviewing the TLT125D0EJXUMA1 datasheet, TLT125D0EJXUMA1 pinout, TLT125D0EJXUMA1 application, or TLT125D0EJXUMA1 equivalent, this page delivers verified technical context, validated pin functions, automotive-grade protection features, and real-world use cases for precision voltage replication under harsh conditions.
Technical Context
The TLT125D0EJXUMA1 implements a monolithic PNP-based tracking architecture where the output voltage precisely follows the ADJ input reference-enabling accurate replication of remote sensor references without dedicated DACs or feedback dividers. Its internal soft-start, reverse-polarity protection, and dual short-circuit protection (to GND and battery) ensure robustness during cold cranking and load dump events.
It operates over a wide input range (4 V to 40 V), supports ceramic output capacitors (1 µF min, ESR ≤5 Ω), and integrates open-drain power-good (PG) monitoring with undervoltage/overvoltage fault detection. The EN pin enables system-level power sequencing, while the exposed thermal pad ensures thermal stability up to 160°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 250 mA max - sufficient to power multiple off-board sensors or secondary ECU rails without external boost stages. |
| Tracking accuracy | ±0.5% - enables direct replacement of reference sources in precision analog signal chains without calibration overhead. |
| Dropout voltage | 250 mV typ. at 250 mA - maintains regulation down to VIN = VREF + 0.25 V, critical for low-headroom automotive battery conditions. |
| Input voltage range | 4 V to 40 V - covers cold-crank (4.5 V), nominal (13.5 V), and load-dump (40 V) transients per ISO 7637-2. |
| Quiescent current | 0.1 µA in standby - allows permanent connection to battery without measurable drain during vehicle sleep modes. |
| Operating temperature | -40°C to 160°C junction - qualified for under-hood placement in x-EV powertrain modules and CAV control units. |
| Protection features | Reverse polarity, short-circuit (GND & battery), overtemperature, UV/OV on PG - eliminates need for discrete protection circuitry. |
Pinout & Package
TLT125D0EJXUMA1 is housed in a thermally enhanced PG-DSO-8 package with exposed thermal pad (connected to GND), supporting high-power dissipation in compact automotive layouts. Pin 1 is OUT; pins 2 and 6 are NC; pin 3 is GND; pin 4 is PG (open-drain); pin 5 is ADJ (reference input); pin 7 is EN (active-high enable); pin 8 is IN (input supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Regulated tracker output | Delivers 250 mA with <±0.5% tracking error; requires local 1 µF ceramic capacitor to GND for stability. |
| GND (Pin 3) | Power and signal reference | Common return for all internal circuits; must be connected to PCB ground plane and exposed pad for thermal and noise integrity. |
| PG (Pin 4) | Open-drain fault indicator | Asserts low on output UV/OV or internal fault; requires external pull-up to system rail for logic-level interfacing. |
| ADJ (Pin 5) | Reference voltage input | Accepts 2.0–14.0 V reference; output replicates this voltage with high fidelity-no external resistors needed. |
| EN (Pin 7) | Active-high enable control | Enables regulator when ≥2 V; ties to IN if always-on operation is required; supports system-level power sequencing. |
| IN (Pin 8) | Main supply input | Accepts 4–40 V; requires local 100 nF ceramic decoupling to GND near pin for transient immunity and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| High-accuracy voltage tracking | ±0.5% tracking error over temperature and load ensures sensor reference integrity without recalibration. |
| Automotive-grade protection suite | Integrated reverse-polarity, short-to-battery/GND, overtemperature, and PG fault signaling reduce BOM count by ≥4 discrete components. |
| Ceramic-capacitor compatibility | Stable with 1 µF/ESR ≤5 Ω output cap-enables small-footprint, low-ESR, high-reliability filtering without tantalum or electrolytic parts. |
| Ultra-low standby current | 0.1 µA shutdown current extends battery life in always-connected modules such as telematics or ADAS domain controllers. |
| Wide input and junction temperature range | Operates from 4 V to 40 V input and -40°C to 160°C junction-qualified for engine bay, transmission, and battery pack locations. |
Applications
| Truck Powertrain Sensor Supply | x-EV Battery Management Interface |
|---|---|
|
Use Scenario: Supplying isolated pressure and temperature sensors mounted on diesel exhaust aftertreatment systems subject to 160°C ambient and ISO 16750-4 transients. IC Role / Device Role / Timing Role: Precision voltage tracker replicating a stable 3.3 V reference from a remote MCU, rejecting battery ripple and load-dump spikes. Use Value: Eliminates need for isolated DC-DC + LDO cascades; ±0.5% tracking ensures ADC accuracy remains within 1 LSB over lifetime. |
Use Scenario: Providing regulated bias to cell-voltage monitoring ICs and isolation amplifiers in high-voltage battery packs (up to 900 V). IC Role / Device Role / Timing Role: Off-board supply generator referenced to a protected 5 V rail, enabling safe, low-noise sensing of individual Li-ion cells. Use Value: Reverse-polarity and short-to-battery protection prevent catastrophic failure during service or assembly errors in HV environments. |
| CAV Steering Angle Sensor Module | Automotive ECU Secondary Rail |
|
Use Scenario: Powering redundant resolver-to-digital converters and Hall-effect angle sensors in steer-by-wire systems requiring ASIL-B compliance. IC Role / Device Role / Timing Role: High-fidelity voltage tracker delivering matched 5.0 V rails to dual-sensor paths, ensuring cross-channel consistency. Use Value: 250 mV dropout enables operation during 6 V cold-crank events while maintaining <1 mV tracking deviation between channels. |
Use Scenario: Generating a clean, protected 3.3 V auxiliary rail for CAN transceivers and watchdog ICs in body control modules. IC Role / Device Role / Timing Role: Secondary regulator fed from main 5 V rail, providing fault-isolated power with PG status reporting to microcontroller. Use Value: Integrated PG output replaces external supervisor ICs; EN pin enables synchronized power-up with main processor reset sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision voltage tracking applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLT125D0EJXUMA1 | 250 mA, ±0.5% tracking, PG-DSO-8, AEC-Q100 Grade 1 | Designed for off-board sensor supply with reverse-polarity and short-to-battery protection | Primary choice for new designs requiring full automotive qualification and integrated fault signaling |
| TLT125D0EJXUMA2 | Same silicon, different tape-and-reel packaging (3,000 pcs/reel vs. 1,000 pcs/reel); identical electrical specs | No functional difference; used for high-volume SMT lines requiring larger reels | Select UMA2 only for production ramp where reel size impacts line efficiency and changeover frequency |
Compared with TLT125D0EJXUMA1 and its UMA2 variant, the UMA1 version offers optimized logistics for prototyping and low-volume builds, while both share identical performance, protection, and qualification-making UMA1 the default for design-in and validation phases.
Availability
TLT125D0EJXUMA1 is available at Aetrix Electronics and suitable for truck powertrain sensor supply, x-EV battery management interface, and CAV steering angle sensor module applications requiring stable component supply, long-term automotive lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for TLT125D0EJXUMA1 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 aligned to IATF 16949.
The OPTIREG™ linear regulator product line targets automotive subsystems demanding high reliability, extended temperature operation, and integrated protection-specifically engineered for off-board sensor powering, ECU auxiliary rails, and safety-critical voltage replication tasks.
FAQ
What is the minimum reference voltage required at the ADJ pin?
The ADJ pin requires a minimum reference voltage of 2.0 V to maintain regulation, as specified in the functional range table (P_3.2.3). Below this threshold, output tracking degrades and may fall out of specification. This value is not adjustable-it is a hard limit defined by internal bandgap and error amplifier headroom.
Can TLT125D0EJXUMA1 operate with input voltages below 4 V?
No. The functional input voltage range is strictly 4 V to 40 V (Table 2, P_3.2.1). Operation below 4 V is outside specification and may result in unregulated output, undefined PG behavior, or activation of undervoltage lockout. It is not rated for start-stop or deep-discharge battery conditions below 4 V.
Is the exposed thermal pad electrically connected internally?
Yes-the exposed pad is internally connected to GND and must be soldered to a PCB ground plane. It serves both thermal dissipation and electrical reference functions. Leaving it floating or connecting it to a non-GND net violates the absolute maximum ratings and risks thermal runaway or PG misreporting.
Does the PG output indicate overtemperature events?
Yes. The PG pin asserts low during overtemperature shutdown, as well as during output undervoltage or overvoltage faults. This is confirmed in Section 4.12 (Functional description power good output) and Table 4 (Electrical characteristics power good output), where "Fault condition" explicitly includes thermal shutdown.
TLT125D0EJXUMA1 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:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 14V
- Voltage Dropout (Max):
- 0.5V @ 250mA
- Current - Output:
- 250mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 25 mA
- PSRR:
- 80dB (100Hz)
- Control Features:
- Enable, Power Good, Soft Start
- Protection Features:
- Over Temperature, Over Voltage, Reverse Polarity, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 160°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-DSO-8-52
TLT125D0EJXUMA1 FAQ
1.How can I place an order for TLT125D0EJXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLT125D0EJXUMA1 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 TLT125D0EJXUMA1 reliable?
The price and inventory of TLT125D0EJXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLT125D0EJXUMA1 is usually 5 days.
3.What payment methods are accepted for TLT125D0EJXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLT125D0EJXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLT125D0EJXUMA1?
TLT125D0EJXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLT125D0EJXUMA1 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 TLT125D0EJXUMA1?
For technical support, including TLT125D0EJXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLT125D0EJXUMA1 requirements.
6.How does Aetrix verify that TLT125D0EJXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLT125D0EJXUMA1 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 TLT125D0EJXUMA1 meets industry standards.
7.What is the process for return or replacement of TLT125D0EJXUMA1?
All TLT125D0EJXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLT125D0EJXUMA1, 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 TLT125D0EJXUMA1 part is unused and in its original packaging.
Return procedure for TLT125D0EJXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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