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Infineon Technologies TLE42794EXUMA1
- Part No.:
- TLE42794EXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-LSSOP (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
TLE42794EXUMA1.pdf
- Description:
- IC REG LINEAR 5V 150MA SSOP-14-2
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
TLE42794EXUMA1 from Infineon is a monolithic low-dropout linear voltage regulator delivering a precise 5.0 V ±2% output at up to 150 mA, featuring integrated power-on/undervoltage reset with programmable delay, early warning sense comparator, and reverse polarity protection. It operates across -40 °C to +150 °C and supports input voltages from -42 V to +45 V, making it suitable for automotive body control modules requiring robust, AEC-Q100-qualified power management.
For engineers reviewing the TLE42794EXUMA1 datasheet, TLE42794EXUMA1 pinout, TLE42794EXUMA1 application, or TLE42794EXUMA1 equivalent, key selection criteria include its adjustable reset threshold (down to 4.65 V typical), reset output low down to VQ = 1 V, dropout voltage under 600 mV at 150 mA, early warning function for external voltage monitoring, and PG-SSOP-14 exposed pad thermal performance.
Technical Context
The TLE42794EXUMA1 implements a precision bandgap reference and error amplifier driving a series pass transistor with saturation control to maintain regulation under varying load and input conditions. Its reset circuitry includes an internal comparator with externally adjustable threshold via RADJ and programmable delay via capacitor on D pin.
The device integrates dual open-collector outputs: RO for reset signaling and SO for early warning indication-both require external pull-up resistors to VQ. The SI pin enables monitoring of any external voltage (e.g., battery or MCU supply), while I pin accepts input decoupling for line transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2% - stable rail for microcontrollers and sensors in harsh automotive environments |
| Max Output Current | 150 mA - sufficient for small ECUs, LIN transceivers, or sensor signal conditioning stages |
| Input Voltage Range | -42 V to +45 V - supports load dump, reverse battery, and cold-crank conditions per ISO 7637-2 |
| Dropout Voltage | ≤600 mV @ 150 mA - enables operation with minimal headroom during low-battery cranking |
| Reset Threshold | Typ. 4.65 V, adjustable down to 1 V - allows system-level brown-out detection with external resistor divider |
| Operating Temp | -40 °C to +150 °C - qualified for under-hood applications including engine control units |
| Reset Delay | Programmable via external capacitor on D pin - enables configurable power-up sequencing timing |
Pinout & Package
Package: PG-SSOP-14 with exposed thermal pad (RoHS-compliant, lead-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 RADJ | Reset threshold adjust | Connect external resistor divider to set custom reset voltage; tie to GND for internal 4.65 V default |
| 2, 5, 6 n.c. | No connection | Not internally bonded; must remain unconnected on PCB |
| 3 D | Reset delay timing | Connect ceramic capacitor to GND to set power-on reset delay; open if unused |
| 4 GND | Ground reference | Main ground return path; connect directly to PCB thermal pad and low-impedance plane |
| 7 RO | Reset output | Open-collector active-low reset signal; requires external pull-up to VQ (not VCC) |
| 8 SO | Sense output | Open-collector early warning flag; requires external pull-up to VQ |
| 9, 10, 12 n.c. | No connection | Not internally bonded; must remain unconnected on PCB |
| 11 Q | Regulated output | 5 V regulated supply output; bypass with low-ESR capacitor close to pin |
| 13 I | Input compensation | Input decoupling node; connect capacitor to GND near IC for line transient immunity |
| 14 SI | Sense input | Monitor external voltage (e.g., battery); connect to Q if unused |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable reset threshold | Enables system-specific brown-out detection without redesigning power architecture |
| Early warning sense comparator | Provides pre-failure alert by monitoring auxiliary rails (e.g., battery or CAN transceiver supply) |
| Reverse polarity protection | Withstands -42 V input without damage-eliminates need for external series diode |
| Overtemperature shutdown | Thermal foldback prevents latch-up during sustained overload or poor heatsinking |
| Low quiescent current | Typ. 120 µA - minimizes standby drain in always-on vehicle networks (e.g., alarm, telematics) |
Applications
| Body Control Module (BCM) | Engine Control Unit (ECU) Subsystem |
|---|---|
Use Scenario: Powering LIN transceivers and door lock actuators in centralized body electronics. IC Role / Device Role / Timing Role: Primary 5 V LDO supplying logic-level peripherals with integrated reset coordination. Use Value: Enables single-chip reset supervision and early warning for battery voltage sag before critical brown-out. | Use Scenario: Regulating supply for crankshaft position sensor interface circuitry in engine bay. IC Role / Device Role / Timing Role: Local 5 V regulator with high-temp operation and load-dump tolerance. Use Value: Maintains sensor bias stability during cranking (≥6 V input) and survives 45 V load dump pulses. |
| Advanced Driver Assistance Systems (ADAS) Camera ECU | Automotive Telematics Control Unit (TCU) |
Use Scenario: Providing clean 5 V rail to image signal processor and CMOS sensor interface. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO with early warning for camera power integrity monitoring. Use Value: Prevents image corruption by triggering SO alert before VQ drops below 4.75 V during transient dips. | Use Scenario: Supplying GPS/GNSS receiver and cellular modem logic sections in always-on connectivity modules. IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO with programmable reset delay for controlled boot sequence. Use Value: Ensures modem firmware initializes only after stable 5 V rail is confirmed, avoiding UART lockup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLE42694G | Integrated 10 kΩ pull-up resistors on RO/SO pins; otherwise identical electrical specs | Eliminates need for external pull-ups; slightly higher quiescent current (140 µA vs. 120 µA) | Select when board space is constrained and external resistor count must be minimized |
| TLV73350PDBVR | Lower max current (300 mA), no reset/sense functions, smaller SOT-23-5 package, non-automotive grade | Lacks AEC-Q100 qualification, reset, early warning, and reverse polarity protection | Select only for non-safety-critical consumer-grade designs where cost and size outweigh functional safety needs |
Compared with TLE42694G, the TLE42794EXUMA1 offers lower quiescent current and greater flexibility in pull-up configuration; compared with TLV73350PDBVR, it delivers full automotive fault resilience-including reverse polarity survival and programmable reset-but in a larger SSOP package.
Availability
TLE42794EXUMA1 is available at Aetrix Electronics and suitable for automotive body control modules, engine control subsystems, ADAS camera ECUs, and telematics control units requiring stable component supply, AEC-Q100 compliance, and extended temperature operation.
Supply support for TLE42794EXUMA1 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 AG 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 linear regulators engineered specifically for automotive power domains-emphasizing fault resilience, wide input range, and integrated supervision features.
FAQ
What is the minimum input voltage required for regulation?
The TLE42794EXUMA1 maintains regulation down to an input voltage of VQ + dropout voltage. With a typical dropout of 600 mV at 150 mA, regulation is sustained as low as 5.6 V input. Below this, output follows input (dropout mode), but the device remains functional and protected.
Can the early warning function monitor voltages other than the input supply?
Yes-the SI pin accepts any external DC voltage (e.g., battery, CAN transceiver VCC, or MCU core rail). The internal comparator triggers SO low when SI falls below the same threshold used for RO, enabling flexible system-level voltage supervision beyond the regulator's own input.
Is the exposed pad on the PG-SSOP-14 package electrically connected?
Yes-the exposed thermal pad is internally connected to GND and must be soldered to a large PCB copper area for thermal dissipation and EMI reduction. Electrical connection to GND improves thermal resistance by up to 25 °C/W and stabilizes noise performance.
How does reverse polarity protection operate without external components?
The TLE42794EXUMA1 integrates a back-to-back MOSFET structure at the input stage that blocks current flow when VIN is negative relative to GND. This allows safe operation down to -42 V without external diodes or fuses, preserving efficiency and board space while meeting ISO 16750-2 requirements.
TLE42794EXUMA1 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:
- Active
- 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 @ 100mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 280 µA
- Current - Supply (Max):
- 8 mA
- PSRR:
- 70dB (100Hz)
- Control Features:
- Reset
- Protection Features:
- Over Current, 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-SSOP-14-2
TLE42794EXUMA1 FAQ
1.How can I place an order for TLE42794EXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE42794EXUMA1 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 TLE42794EXUMA1 reliable?
The price and inventory of TLE42794EXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE42794EXUMA1 is usually 5 days.
3.What payment methods are accepted for TLE42794EXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE42794EXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE42794EXUMA1?
TLE42794EXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE42794EXUMA1 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 TLE42794EXUMA1?
For technical support, including TLE42794EXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE42794EXUMA1 requirements.
6.How does Aetrix verify that TLE42794EXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLE42794EXUMA1 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 TLE42794EXUMA1 meets industry standards.
7.What is the process for return or replacement of TLE42794EXUMA1?
All TLE42794EXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE42794EXUMA1, 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 TLE42794EXUMA1 part is unused and in its original packaging.
Return procedure for TLE42794EXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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