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Infineon Technologies TLE72782EV50XUMA1
- Part No.:
- TLE72782EV50XUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLE72782EV50XUMA1.pdf
- Description:
- IC REG LIN 5V 180MA SSOP-14-EP
- Quantity:
- Payment:
- Shipping:
Inventory:2,847
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Product details
Overview
TLE72782EV50XUMA1 from Infineon Technologies is an automotive-grade monolithic low-dropout voltage regulator with integrated watchdog and reset generator, designed for microcontroller power supply in harsh environments. It delivers a fixed 5 V output (±2% tolerance), supports up to 180 mA load current, features ultra-low quiescent current (<36 µA), and operates across -40 °C to +150 °C junction temperature. Used in engine control units and body electronics where battery-constant operation and fail-safe reset are required.
For engineers reviewing the TLE72782EV50XUMA1 datasheet, TLE72782EV50XUMA1 pinout, TLE72782EV50XUMA1 application, or TLE72782EV50XUMA1 equivalent, key selection criteria include its PG-SSOP-14 exposed pad package, enable-controlled shutdown (<3 µA), adjustable power-on reset delay, current-dependent watchdog deactivation, and AEC-Q100 qualification for automotive use.
Technical Context
The TLE72782EV50XUMA1 integrates a bandgap reference, charge pump, reset generator, and standard watchdog with mode-selectable behavior via WM1/WM2 pins. Its watchdog deactivates automatically under light load (e.g., MCU standby) to minimize current draw, and reactivates upon load increase.
Reset generation is voltage-monitored (VRT threshold) with glitch immunity (tRR), programmable delay (tRD), and open-drain RO output with internal 20 kΩ pull-up - eliminating external components for 5 V systems. The EN pin enables full shutdown, and overtemperature shutdown plus current limiting provide fault protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2% - stable MCU core supply tolerant of battery voltage transients up to 45 V input |
| Max Output Current | 180 mA - sufficient for 32-bit automotive MCUs and peripheral logic in ECU sub-systems |
| Quiescent Current | <36 µA - enables always-on battery-connected applications without excessive parasitic drain |
| Dropout Voltage | Typ. 300 mV @ 180 mA - maintains regulation down to VI = 5.3 V, critical during cold-crank conditions |
| Operating Input Range | 5.5 V to 45 V - covers full automotive battery range including load dump (40 V transient) |
| Junction Temp Range | −40 °C to +150 °C - qualified for under-hood placement per AEC-Q100 Grade 0 |
| Watchdog Behavior | Current-dependent deactivation - disables watchdog during MCU sleep, reducing system current autonomously |
| Reset Output | Open-drain with internal 20 kΩ pull-up - simplifies interface to 5 V logic without external resistor |
Pinout & Package
Package: PG-SSOP-14 with exposed thermal pad (connected to GND on PCB for heatsinking).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RO | Reset output with internal 20 kΩ pull-up; asserts low during power-up/down or fault |
| 2,5 | GND | Ground reference and primary return path; must be low-impedance connection |
| 3,4,10,11,12 | n.c. | No-connect pins; leave floating or tie to GND for mechanical stability |
| 6 | WM2 | Watchdog mode bit 2 - selects watchdog/reset configuration with WM1 |
| 7 | WM1 | Watchdog mode bit 1 - pairs with WM2 to define timeout, reset polarity, and activation logic |
| 8 | WDI | Watchdog trigger input - requires periodic pulse; pull to GND to disable watchdog |
| 9 | Q | Regulated 5 V output - requires local 470 nF ceramic capacitor with ≤3 Ω ESR |
| 13 | I | Input voltage - bypassed with 100 nF ceramic capacitor directly at pin |
| 14 | EN | Enable input - active-high; internal pull-down ensures default disable on power-up |
| Pad | Exposed Pad | Thermal interface - must be soldered to GND plane for RthJA = 47 K/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Watchdog + Reset Generator | Eliminates need for discrete supervisory ICs; reduces BOM count and board space in ECU designs |
| Current-Dependent Watchdog Deactivation | Automatically disables watchdog during MCU standby, cutting system current without software intervention |
| Adjustable Power-On Reset Delay (tRD) | Configurable via external capacitor on RO pin - ensures reliable MCU boot after supply stabilization |
| AEC-Q100 Qualified (Grade 0) | Validated for operation up to +150 °C junction temperature - suitable for direct engine compartment mounting |
| Overtemperature & Overcurrent Protection | Self-protecting under short-circuit, overload, or thermal runaway - no external circuitry required |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 32-bit microcontroller and CAN transceivers in gasoline/diesel engine management systems. IC Role / Device Role / Timing Role: Primary 5 V LDO with integrated reset and watchdog - provides fail-safe MCU supervision during cranking and load dump. Use Value: Maintains regulation down to 5.3 V input and survives 45 V transients, ensuring uninterrupted operation across full vehicle battery profile. | Use Scenario: Supplies gateway MCU and LIN transceivers in centralized body electronics architecture. IC Role / Device Role / Timing Role: Always-on 5 V regulator with ultra-low quiescent current and enable-controlled shutdown. Use Value: Draws <36 µA in active mode and <3 µA in EN-disabled state - meets OEM requirements for <100 µA total sleep current. |
| Transmission Control Unit (TCU) | Advanced Driver Assistance Systems (ADAS) Sensor Hub |
Use Scenario: Provides clean 5 V rail to transmission MCU and solenoid drivers in automatic gearbox control. IC Role / Device Role / Timing Role: Regulator with overtemperature shutdown and current limiting - protects against solenoid short-circuit faults. Use Value: Withstands 150 °C junction temperature and shuts down before damage occurs, enabling robust field operation. | Use Scenario: Powers image signal processor and radar interface logic in compact ADAS domain controller. IC Role / Device Role / Timing Role: Compact PG-SSOP-14 exposed pad regulator - delivers thermal performance equivalent to larger packages. Use Value: RthJA = 47 K/W with PCB heatsink enables >150 mA continuous output in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator with watchdog applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70733PDRVR | 3.3 V fixed output, no watchdog/reset, 200 mA max, SOT-563 package | Lacks integrated supervision functions; requires external reset IC for MCU safety compliance | Select only if system already implements discrete watchdog and reset, and 3.3 V output suffices |
| MAX16922ATP/V+T | 5 V output, integrated watchdog & reset, but rated only to +125 °C junction, TQFN-20 package | Not AEC-Q100 Grade 0 qualified; unsuitable for under-hood high-temp locations | Acceptable for cabin-mounted modules where ambient temperature remains below 85 °C |
Compared with TLV70733PDRVR and MAX16922ATP/V+T, the TLE72782EV50XUMA1 uniquely combines AEC-Q100 Grade 0 qualification, current-dependent watchdog deactivation, and 5 V output with internal pull-up reset - making it the only drop-in solution for high-reliability engine bay applications requiring autonomous low-power supervision.
Availability
TLE72782EV50XUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply under automotive qualification and thermal stress.
Supply support for TLE72782EV50XUMA1 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.
The TLE7278 series belongs to Infineon's automotive power management portfolio, engineered specifically for microcontroller power supply and functional safety supervision in engine, transmission, and chassis control systems.
FAQ
What is the function of the WM1 and WM2 pins on the TLE72782EV50XUMA1?
WM1 and WM2 are watchdog mode configuration pins that select reset polarity, watchdog timeout, and activation behavior in combination. They determine whether the watchdog resets on timeout, generates a warning pulse, or remains disabled - all without firmware involvement. Their states (high/low) map directly to modes defined in Figure 5 of the datasheet, enabling hardware-only safety configuration.
Does the TLE72782EV50XUMA1 require an external pull-up resistor on the RO pin?
No. Unlike the TLE7278-2GV33/GV26 variants, the TLE72782EV50XUMA1 integrates a 20 kΩ pull-up resistor on the RO pin. This eliminates the need for an external resistor when interfacing with 5 V logic, simplifying layout and reducing component count while maintaining guaranteed VOH ≥ 4.5 V under load.
How does the current-dependent watchdog deactivation work?
The watchdog circuit monitors output load current internally. When Q-pin current drops below ~10 mA - indicating MCU entry into deep sleep - the watchdog automatically disables to reduce quiescent current. It re-enables when load current rises above threshold, ensuring supervision resumes immediately upon wake-up without software polling or timer restart.
Can the TLE72782EV50XUMA1 be used outside automotive applications?
Yes, but its design priorities - AEC-Q100 qualification, 150 °C operation, and load-dump tolerance - make it over-specified for non-automotive use. In industrial settings, it offers robustness against voltage transients and thermal stress, though cost and package size may favor alternatives unless those specific features are required.
TLE72782EV50XUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 180mA
- Current - Output:
- 180mA
- Current - Quiescent (Iq):
- 36 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB (100Hz)
- Control Features:
- Enable, Reset, Watchdog
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-SSOP-14-EP
TLE72782EV50XUMA1 FAQ
1.How can I place an order for TLE72782EV50XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE72782EV50XUMA1 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 TLE72782EV50XUMA1 reliable?
The price and inventory of TLE72782EV50XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE72782EV50XUMA1 is usually 5 days.
3.What payment methods are accepted for TLE72782EV50XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE72782EV50XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE72782EV50XUMA1?
TLE72782EV50XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE72782EV50XUMA1 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 TLE72782EV50XUMA1?
For technical support, including TLE72782EV50XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE72782EV50XUMA1 requirements.
6.How does Aetrix verify that TLE72782EV50XUMA1 is sourced from the original manufacturer or authorized distributors?
All TLE72782EV50XUMA1 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 TLE72782EV50XUMA1 meets industry standards.
7.What is the process for return or replacement of TLE72782EV50XUMA1?
All TLE72782EV50XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE72782EV50XUMA1, 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 TLE72782EV50XUMA1 part is unused and in its original packaging.
Return procedure for TLE72782EV50XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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