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Infineon Technologies TLE42712AKSA1
- Part No.:
- TLE42712AKSA1
- Manufacturer:
- Infineon Technologies
- Package:
- TO-220-7 Formed Leads
- Datasheet:
-
TLE42712AKSA1.pdf
- Description:
- IC REG LIN 5V 550MA TO220-7-11
- Quantity:
- Payment:
- Shipping:
Inventory:2,192
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Product details
Overview
TLE42712AKSA1 from Infineon Technologies is a 5-V fixed-output, low-dropout linear voltage regulator with integrated watchdog and reset generator, reverse polarity protection, overvoltage protection (65 V/400 ms), and overtemperature shutdown. It delivers ±2% output accuracy at up to 550 mA load across 6–26 V input, supports inhibit control, and is AEC-Q100 qualified for automotive power rail conditioning in engine control units.
For engineers reviewing the TLE42712AKSA1 datasheet, TLE42712AKSA1 pinout, TLE42712AKSA1 application, or TLE42712AKSA1 equivalent, key selection criteria include dropout voltage (≤700 mV @ 550 mA), watchdog timing (40–80 ms period), reset delay adjustability (via external capacitor), and 42 V continuous / 65 V transient input capability.
Technical Context
The TLE42712AKSA1 integrates a bandgap reference, error amplifier, pass transistor, and protection circuitry into a single monolithic IC. Its architecture includes an open-collector reset output (RO) pulled internally to Q via 30 kΩ, a programmable reset delay (D pin with external capacitor), and a watchdog input (WI) that monitors controller activity using dual-threshold hysteresis (0.2–2.3 V).
It implements thermal shutdown at junction temperatures exceeding 150 °C, reverse-polarity blocking down to −42 V, and overvoltage cutoff triggered at 40–46 V. The inhibit (INH) input enables full device shutdown with <25 µA standby current, while output current limiting activates at 650–800 mA under short-circuit conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 5.00 V ±2% (4.90–5.10 V); stable across 5–550 mA load and 6–26 V input |
| Dropout voltage | ≤700 mV @ 550 mA; enables regulation from 5.7 V input in low-voltage battery scenarios |
| Input voltage range | −42 V to +42 V continuous; +65 V survivable for ≤400 ms (load dump protection) |
| Reset delay timing | 8–18 ms with 100 nF capacitor on D pin; configurable for power-on sequencing |
| Watchdog period | 40–80 ms with 100 nF capacitor; detects microcontroller lockup in safety-critical systems |
| Thermal shutdown | Activates at Tj ≥ 150 °C; protects against sustained overload or poor heatsinking |
| Quiescent current | ≤6 µA in inhibit-off state; minimizes battery drain during vehicle sleep mode |
Pinout & Package
Package: PG-TO263-7 (TO-263-7), surface-mount, thermally enhanced with exposed die pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input bypass connection | Direct ceramic capacitor tie to GND; stabilizes input impedance and suppresses transients |
| 2 (INH) | Inhibit control input | Logic-level enable/disable; <1.3 V disables regulator, >2.0 V enables operation |
| 3 (RO) | Open-collector reset output | Pulled to Q via 30 kΩ internally; drives external reset line when VQ drops below 4.5 V |
| 4 (GND) | Power ground reference | Main return path for load, bias, and protection currents; must be low-impedance |
| 5 (D) | Reset delay capacitor terminal | Connects external capacitor to set power-on reset timeout (e.g., 100 nF → 13 ms typical) |
| 6 (WI) | Watchdog input | Accepts periodic pulses; missing edge triggers reset after watchdog period expires |
| 7 (Q) | 5-V regulated output | Delivers up to 550 mA; requires 22 µF low-ESR capacitor (ESR < 3 Ω) for stability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated watchdog timer | Programmable 40–80 ms period with 30–66 ms trigger window; eliminates need for external supervision IC |
| Adjustable power-on reset | Capacitor-programmable delay (8–18 ms); ensures MCU initialization completes before release |
| Reverse polarity protection | Withstands −42 V input without damage; prevents field failures from battery misconnection |
| Load dump survival | 65 V transient tolerance for ≤400 ms per ISO 7637-2 Pulse 5a; meets automotive surge requirements |
| AEC-Q100 Grade 1 qualification | Validated for −40 °C to +125 °C ambient operation; suitable for under-hood ECU deployment |
Applications
| Engine Control Unit (ECU) Power Supply | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Regulates 5 V rail for microcontroller, CAN transceivers, and sensor interfaces in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Primary LDO with integrated reset and watchdog; provides fault-aware power sequencing and fail-safe shutdown. Use Value: Eliminates discrete reset supervisor and watchdog ICs; reduces BOM count and PCB area by 30% vs. discrete solution. | Use Scenario: Powers 5 V logic in automatic transmission controllers exposed to high-temperature, high-vibration environments. IC Role / Device Role / Timing Role: High-reliability voltage regulator with thermal shutdown and load-dump immunity for ASIL-B subsystems. Use Value: Maintains regulation during cold-crank (down to 6 V) and load dump (65 V/400 ms), ensuring uninterrupted gear-shift logic. |
| Body Control Module (BCM) | Advanced Driver Assistance Systems (ADAS) Camera ECU |
Use Scenario: Supplies 5 V to door module MCUs, LIN transceivers, and LED drivers in centralized body electronics. IC Role / Device Role / Timing Role: Inhibit-controlled LDO enabling deep-sleep mode; RO output synchronizes MCU wake-up sequence. Use Value: Achieves <6 µA quiescent current in inhibit-off state, meeting OEM 100 µA total module sleep budget. | Use Scenario: Powers image signal processor and serializer in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Safety-monitored regulator; WI input verifies ISP firmware liveness; RO asserts system reset on anomaly detection. Use Value: Enables ASIL-B compliance via hardware-based fault detection-no software polling required for watchdog monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5-V automotive LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV73350PDBVR | Lower IQ (2.5 µA), no watchdog/reset, max 300 mA output, 5.5 V max input | Lacks automotive qualification, no overvoltage or thermal protection beyond basic limits | Only suitable for non-safety, low-power infotainment peripherals-not for ECU/TCM primary rails |
| MAX16910ATA+T | 5 V output, 250 mA, integrated watchdog & reset, but no inhibit pin and only 28 V abs max input | No reverse polarity protection; not qualified to AEC-Q100 Grade 1 | Acceptable for interior modules with limited voltage stress; insufficient for engine bay deployment |
Compared with TLV73350PDBVR and MAX16910ATA+T, TLE42712AKSA1 uniquely combines 550 mA output, 65 V transient survival, AEC-Q100 Grade 1 rating, and full inhibit/watchdog/reset integration-making it the only drop-in solution for demanding under-hood power domains.
Availability
TLE42712AKSA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and body control modules requiring stable component supply, long-term automotive lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for TLE42712AKSA1 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, and industrial control ICs, with global manufacturing and qualification infrastructure.
The OPTIREG™ Linear product line delivers AEC-Q100-qualified voltage regulators engineered specifically for automotive power distribution-emphasizing robustness, functional safety, and integration of supervision features.
FAQ
What is the maximum allowable input voltage for continuous operation?
The TLE42712AKSA1 supports continuous input voltages from −42 V to +42 V. It tolerates up to +65 V for durations ≤400 ms, complying with ISO 7637-2 Pulse 5a load dump requirements. Operation outside these limits risks permanent damage, even briefly.
How does the watchdog function interact with the reset generator?
The watchdog (WI pin) and reset generator (D/RO pins) operate independently but share the same internal state machine. A missed watchdog pulse triggers a reset after the programmed watchdog period, asserting RO low. Power-on reset delay (set by D pin capacitor) occurs first; watchdog monitoring begins only after reset deassertion.
Can the reset output (RO) drive a microcontroller's external reset pin directly?
Yes-RO is an open-collector output with internal 30 kΩ pull-up to Q. It sinks up to 3 mA and can directly assert standard CMOS or TTL reset inputs. For longer traces or noise-sensitive designs, add a 10 kΩ external pull-up to 5 V and series RC filter per MCU datasheet recommendations.
Is thermal derating required when operating above 100 °C ambient?
Yes-junction temperature must remain ≤150 °C. With RthJA = 65 K/W (PG-TO263-7), output current must be reduced above 100 °C ambient. At 125 °C ambient, max continuous load drops to ~350 mA with standard PCB copper; forced airflow or heatsinking restores full 550 mA capability.
TLE42712AKSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- TO-220-7 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.7V @ 550mA
- Current - Output:
- 550mA
- Current - Quiescent (Iq):
- 6 µA
- Current - Supply (Max):
- 90 mA
- PSRR:
- 54dB (100Hz)
- Control Features:
- Reset, Watchdog
- Protection Features:
- Over Current, Over Temperature, Over Voltage, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- P-TO220-7-11
TLE42712AKSA1 FAQ
1.How can I place an order for TLE42712AKSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE42712AKSA1 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 TLE42712AKSA1 reliable?
The price and inventory of TLE42712AKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE42712AKSA1 is usually 5 days.
3.What payment methods are accepted for TLE42712AKSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE42712AKSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE42712AKSA1?
TLE42712AKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE42712AKSA1 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 TLE42712AKSA1?
For technical support, including TLE42712AKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE42712AKSA1 requirements.
6.How does Aetrix verify that TLE42712AKSA1 is sourced from the original manufacturer or authorized distributors?
All TLE42712AKSA1 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 TLE42712AKSA1 meets industry standards.
7.What is the process for return or replacement of TLE42712AKSA1?
All TLE42712AKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE42712AKSA1, 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 TLE42712AKSA1 part is unused and in its original packaging.
Return procedure for TLE42712AKSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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