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Infineon Technologies TLE42712SAKSA1
- Part No.:
- TLE42712SAKSA1
- Manufacturer:
- Infineon Technologies
- Package:
- TO-220-7
- Datasheet:
-
TLE42712SAKSA1.pdf
- Description:
- IC REG LIN 5V 550MA TO220-7-12
- Quantity:
- Payment:
- Shipping:
Inventory:4,016
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Product details
Overview
TLE42712SAKSA1 from Infineon Technologies is a 5-V low-drop fixed linear voltage regulator with integrated watchdog, reset generator, and automotive-grade protection. It delivers up to 550 mA output current with ±2% output voltage tolerance (4.90–5.10 V), supports input voltages up to 42 V (65 V transient ≤400 ms), and operates across −40 °C to +150 °C junction temperature. Used in engine control units for stable 5-V supply to microcontrollers and sensors.
For engineers reviewing the TLE42712SAKSA1 datasheet, TLE42712SAKSA1 pinout, TLE42712SAKSA1 application, or TLE42712SAKSA1 equivalent, key selection criteria include its integrated reset delay (8–18 ms with 100 nF capacitor), watchdog period (40–80 ms), inhibit-controlled shutdown, and AEC-Q100 qualification for automotive power rail conditioning.
Technical Context
The TLE42712SAKSA1 implements a bandgap-referenced control amplifier driving a series pass transistor with saturation control to maintain regulation under varying load. Its reset generator uses a precision charge/discharge circuit on the D pin to set delay time, while the watchdog monitors rising edges on WI to prevent system lockup.
Protection functions are fully integrated: overtemperature shutdown triggers at ~150 °C, reverse polarity protection blocks negative input, and overvoltage protection disables operation above 46 V (typical turn-off). The RO pin provides open-collector reset signaling with internal 30 kΩ pull-up to Q.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | 5.00 V ±2% (4.90–5.10 V) at 5–550 mA load; ensures stable MCU core/sensor biasing |
| Drop voltage | 350–700 mV at 550 mA; enables regulation down to VI = 5.7 V minimum |
| Input voltage range | 6–40 V continuous; withstands 65 V transients ≤400 ms per ISO 7637-2 |
| Reset delay time | 8–18 ms with 100 nF capacitor on D pin; configurable brown-out recovery timing |
| Watchdog period | 40–80 ms with 100 nF capacitor; detects controller hang within defined window |
| Thermal resistance | RthJC = 2 K/W (PG-TO263-7-1); enables >550 mA operation with minimal heatsink |
| Quiescent current | 6 µA (INH = 0 V); ultra-low standby power for always-on vehicle modules |
Pinout & Package
Package: PG-TO263-7-1 (D²PAK-7), surface-mount, thermally enhanced, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (I) | Input | Primary VIN connection; requires local 100 nF ceramic capacitor to GND |
| 2 (INH) | Inhibit | Active-high enable; device shuts down when pulled <0.8 V (typ.) |
| 3 (RO) | Reset Output | Open-collector output with internal 30 kΩ pull-up to Q; asserts low on reset |
| 4 (GND) | Ground | Power and signal reference; must be low-inductance path to input capacitor |
| 5 (D) | Reset Delay | Capacitor connection point for reset timeout; sets tD = 8–18 ms with 100 nF |
| 6 (WI) | Watchdog Input | Edge-triggered input; rising edge resets watchdog timer |
| 7 (Q) | 5-V Output | Regulated output; requires 22 µF low-ESR (<3 Ω) bulk capacitor to GND |
Key Features
| Feature | Design Value |
|---|---|
| Integrated watchdog timer | Configurable 40–80 ms period via external capacitor; prevents firmware lockup without external IC |
| Programmable reset delay | 8–18 ms delay before reset release using single capacitor on D pin; eliminates need for RC timing network |
| AEC-Q100 qualified | Qualified to Grade 0 (−40 °C to +150 °C); validated for engine bay and transmission control applications |
| Reverse polarity protection | Withstands −42 V input without damage; protects against battery misconnection in service |
| Overvoltage clamp | Shuts down at 46 V (typ.) and recovers after transient; meets ISO 7637-2 Pulse 5a requirements |
Applications
| Engine Control Unit (ECU) | Transmission Control Module (TCM) |
|---|---|
Use Scenario: Powers 5-V microcontroller, CAN transceiver, and analog sensor front-end in gasoline/diesel ECU. IC Role / Device Role / Timing Role: Primary 5-V LDO with watchdog supervision and reset coordination for safe boot and runtime fault detection. Use Value: Enables single-chip power management with guaranteed reset assertion during undervoltage and watchdog-triggered recovery. | Use Scenario: Supplies 5-V logic rails in automatic transmission control unit exposed to high ambient temperatures. IC Role / Device Role / Timing Role: High-temp-stable regulator with thermal shutdown and inhibit control for gear-shifting sequence safety. Use Value: Maintains regulation up to 150 °C junction temperature while providing fail-safe reset signaling to prevent unintended actuation. |
| Body Control Module (BCM) | Advanced Driver Assistance System (ADAS) Power Sequencer |
Use Scenario: Provides always-on 5-V supply to door module microcontrollers and LIN transceivers. IC Role / Device Role / Timing Role: Low-quiescent-current (6 µA) regulator with inhibit control for sleep/wake cycling. Use Value: Reduces parasitic drain below 10 µA in vehicle-off state while enabling fast wake-up via INH pin. | Use Scenario: Sequences power to radar processor, image sensor, and CAN FD interface in 24-V ADAS domain controller. IC Role / Device Role / Timing Role: Pre-regulator with programmable reset delay and watchdog to coordinate multi-rail startup and fault containment. Use Value: Ensures synchronized initialization of safety-critical subsystems and isolates faults before full system activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5-V automotive LDO with watchdog and reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70750PDRVR | No integrated watchdog or reset generator; 300 mA max output; 250 mV dropout at 300 mA | Suitable only for non-safety-critical 5-V loads without supervision | Select if cost-sensitive, low-power, and no system-level fault monitoring required |
| MAX16126ATP+T | Higher quiescent current (25 µA); no inhibit pin; fixed 100 ms reset timeout (non-adjustable) | Limited flexibility in reset timing; lacks INH control for deep-sleep sequencing | Select if board space is constrained and fixed reset timing suffices |
Compared with TLV70750PDRVR and MAX16126ATP+T, the TLE42712SAKSA1 uniquely combines adjustable reset delay, edge-triggered watchdog, inhibit control, and AEC-Q100 Grade 0 rating-enabling single-chip compliance with ASIL-B power management requirements.
Availability
TLE42712SAKSA1 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and ADAS domain controllers requiring stable component supply with automotive qualification and long-term lifecycle support.
Supply support for TLE42712SAKSA1 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.
The TLE4271 product line delivers highly integrated, AEC-Q100-qualified linear regulators for automotive power rails-designed specifically for engine, transmission, and chassis control systems demanding robustness, supervision, and extended temperature operation.
FAQ
What is the maximum continuous input voltage for TLE42712SAKSA1?
The maximum continuous input voltage is 40 V, as specified in the operating range (Table 3). It tolerates up to 65 V for ≤400 ms per absolute maximum ratings, enabling compliance with ISO 7637-2 load dump pulse testing in automotive environments.
How is the reset delay time configured on the TLE42712SAKSA1?
Reset delay is set by connecting a capacitor between pin D (5) and GND. With a 100 nF capacitor, delay ranges from 8 ms (min) to 18 ms (max) across temperature and process variation, as defined in Table 4. No external resistors are needed.
Does TLE42712SAKSA1 require an external pull-up resistor on the RO pin?
No. Pin RO (3) has an internal 30 kΩ pull-up resistor connected to the Q (7) output. This eliminates the need for an external component while ensuring proper reset signaling level relative to the regulated 5-V rail.
Can the watchdog function operate independently of the reset generator?
Yes. The watchdog circuit activates only after the reset output RO goes high (i.e., after the D-pin capacitor charges above VUD). It then discharges the same capacitor at a different rate (IDWD) and does not interfere with initial reset timing or inhibit-controlled shutdown.
TLE42712SAKSA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- TO-220-7
- 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:
- PG-TO220-7-12
TLE42712SAKSA1 FAQ
1.How can I place an order for TLE42712SAKSA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE42712SAKSA1 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 TLE42712SAKSA1 reliable?
The price and inventory of TLE42712SAKSA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE42712SAKSA1 is usually 5 days.
3.What payment methods are accepted for TLE42712SAKSA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE42712SAKSA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE42712SAKSA1?
TLE42712SAKSA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE42712SAKSA1 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 TLE42712SAKSA1?
For technical support, including TLE42712SAKSA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE42712SAKSA1 requirements.
6.How does Aetrix verify that TLE42712SAKSA1 is sourced from the original manufacturer or authorized distributors?
All TLE42712SAKSA1 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 TLE42712SAKSA1 meets industry standards.
7.What is the process for return or replacement of TLE42712SAKSA1?
All TLE42712SAKSA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE42712SAKSA1, 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 TLE42712SAKSA1 part is unused and in its original packaging.
Return procedure for TLE42712SAKSA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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