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Infineon Technologies TLE4278GXUMA1
- Part No.:
- TLE4278GXUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLE4278GXUMA1.pdf
- Description:
- IC REG LINEAR 5V 200MA DSO14-30
- Quantity:
- Payment:
- Shipping:
Inventory:1,254
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Product details
Overview
TLE4278GXUMA1 from Infineon is a monolithic 5 V low-drop fixed-output linear voltage regulator delivering up to 200 mA, featuring integrated watchdog and reset functions with adjustable thresholds, ±2% output voltage tolerance, and AEC-Q100 qualification for automotive microprocessor supply under harsh conditions.
For engineers reviewing the TLE4278GXUMA1 datasheet, TLE4278GXUMA1 pinout, TLE4278GXUMA1 application, or TLE4278GXUMA1 equivalent, this device supports critical power sequencing, fault monitoring, and safe MCU startup in engine control units, body electronics, and ADAS domain controllers where precise reset timing and watchdog supervision are mandatory.
Technical Context
The TLE4278GXUMA1 implements a bandgap-referenced control amplifier with thermal shutdown, reverse polarity protection, and short-circuit proof operation. Its dual open-collector outputs (RO and WO) operate independently-RO provides under-voltage and power-on reset signals, while WO delivers watchdog timeout interrupts triggered by missing rising edges at WI.
Reset delay is set via external capacitor on pin D (12–28 ms typical with 47 nF), and both reset threshold (via RADJ voltage divider) and watchdog activation time (via WADJ resistor) are user-adjustable. The IC maintains regulation across VI = 5.5–45 V and junction temperature −40°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.00 V ±2% - stable supply for 5 V MCUs and peripherals across load (0–200 mA) and input (6–45 V). |
| Drop Voltage | 0.25 V max at 150 mA - enables operation with minimal headroom, e.g., from 5.75 V battery during cranking. |
| Quiescent Current | 200 µA typ at 25°C - preserves battery life in always-on automotive modules. |
| Reset Threshold | 4.65 V typ (adjustable 4.5–4.8 V) - ensures reliable MCU reset before brownout-induced corruption. |
| Watchdog Timeout | User-adjustable via WADJ resistor - allows flexible pulse-interval supervision of MCU activity without firmware changes. |
| Operating Temp | −40°C to +150°C - qualified per AEC-Q100 Grade 0 for under-hood ECU deployment. |
| Package | PG-DSO-14 (RoHS-compliant, green product) - surface-mount package with thermal pad for PCB heat dissipation. |
Pinout & Package
Package: PG-DSO-14 (14-pin exposed-pad SOIC variant, thermally enhanced for automotive ambient conditions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 WO | Watchdog output | Open-collector interrupt signal pulled internally to VQ (5 V) via 30 kΩ; asserts low on watchdog timeout. |
| 2 WADJ | Watchdog threshold adjust | Resistor-to-GND sets watchdog activation time; also enables load-current-dependent disable. |
| 3,4,5,10,11,12 GND | Ground reference | Six dedicated ground pins minimize impedance and improve noise immunity in noisy automotive environments. |
| 6 D | Reset delay capacitor | External capacitor sets reset delay time (12–28 ms with 47 nF); defines power-on reset hold duration. |
| 7 RADJ | Reset threshold adjust | Voltage divider input to set custom reset switching point below internal 4.65 V threshold. |
| 8 WI | Watchdog input | Rising-edge-triggered monitor input; detects MCU heartbeat pulses to prevent false timeouts. |
| 9 Q | 5 V regulated output | Must be decoupled with ≥10 µF ceramic capacitor (ESR ≤5 Ω) directly at pin for stability. |
| 13 I | Input voltage | Accepts 5.5–45 V; requires local ceramic decoupling directly at pin to suppress transients. |
| 14 RO | Reset output | Open-collector reset signal pulled internally to VQ (5 V) via 30 kΩ; active-low during reset. |
Key Features
| Feature | Design Value |
|---|---|
| Separated reset and watchdog outputs | Enables independent handling of power-fail recovery (RO) and software hang detection (WO) without signal contention. |
| Adjustable reset threshold (RADJ) | Supports legacy or low-VDD MCUs requiring reset assertion below 4.65 V, e.g., at 4.2 V for extended brownout margin. |
| Load-dependent watchdog disable | Automatically suspends watchdog supervision during MCU sleep mode when current drops below WADJ-set threshold - eliminates spurious wakeups. |
| Reverse polarity & overtemperature protection | Prevents damage from battery misconnection or thermal runaway; no external components required for basic fault coverage. |
| Green Product (RoHS compliant) | Meets automotive environmental compliance requirements without lead or hazardous substance exemptions. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Powers 5 V microcontroller and CAN transceivers in gasoline/diesel engine management systems exposed to wide battery voltage swings and high ambient temperatures. IC Role / Device Role / Timing Role: Primary 5 V regulator with synchronized power-on reset and watchdog supervision of main MCU execution loop. Use Value: Ensures deterministic boot sequence and runtime fault detection even during cold cranking (5.5 V) or load dump (45 V) events. | Use Scenario: Supplies door module MCU, LIN transceivers, and sensor interfaces in vehicle body electronics with intermittent power states. IC Role / Device Role / Timing Role: Provides stable 5 V rail and programmable reset delay to coordinate multi-peripheral initialization after ignition-on. Use Value: Adjustable RADJ and D pins allow tailored reset behavior for mixed-voltage subsystems and low-power sleep/wake transitions. |
| Advanced Driver Assistance Systems (ADAS) | Infotainment Power Management |
Use Scenario: Regulates vision processor and radar SoC auxiliary rails in front camera or parking assist ECUs operating near engine bay heat sources. IC Role / Device Role / Timing Role: High-temp-stable 5 V source with watchdog input monitoring real-time image processing firmware liveness. Use Value: Independent WO output feeds interrupt line to host processor, enabling immediate response to algorithm stalls without affecting system reset state. | Use Scenario: Supplies audio DSP, display controller, and USB interface ICs in head unit designs requiring clean, sequenced power-up. IC Role / Device Role / Timing Role: Delivers regulated 5 V with precise reset timing to ensure memory initialization completes before firmware execution begins. Use Value: ±2% output tolerance and low drift over temperature guarantee consistent analog biasing and ADC reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70733PDBVR | 3.3 V fixed output, 200 mA, no watchdog/reset features, SOT-23-5 package | Lacks integrated reset/watchdog; requires external supervisor IC for safety-critical functions | Select only for non-safety 3.3 V applications where cost and footprint are prioritized over functional integration |
| MAX16126ATP+T | 5 V output, 250 mA, integrated watchdog and reset, but requires external MOSFET for reverse polarity protection | Higher current capability but adds BOM complexity and board area for discrete protection | Choose when higher load current is needed and design can accommodate external protection circuitry |
Compared with TLV70733PDBVR and MAX16126ATP+T, the TLE4278GXUMA1 uniquely integrates AEC-Q100-qualified watchdog, reset, reverse polarity, and overtemperature protection in a single PG-DSO-14 package-reducing component count, validation effort, and failure modes in ASIL-B–capable systems.
Availability
TLE4278GXUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS domain controllers, and infotainment power supplies requiring stable component supply, long-term automotive lifecycle support, and full traceability.
Supply support for TLE4278GXUMA1 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 security solutions, with global manufacturing and automotive qualification infrastructure.
The OPTIREG™ Linear product line delivers AEC-Q100-qualified voltage regulators engineered specifically for automotive power domains-emphasizing robustness, functional safety readiness, and seamless integration into ECU power architectures.
FAQ
What is the maximum input voltage the TLE4278GXUMA1 can withstand?
The absolute maximum input voltage is 45 V, with functional operation guaranteed from 5.5 V to 45 V. It is designed to survive automotive load-dump transients per ISO 7637-2 Pulse 5a (up to 60 V for <100 ms), though sustained operation above 45 V risks permanent damage per datasheet limits.
Can the watchdog and reset outputs be used simultaneously without conflict?
Yes - RO and WO are fully independent open-collector outputs, each internally pulled to VQ via separate 30 kΩ resistors. They may drive different logic inputs or be externally wired together if system-level reset-and-interrupt consolidation is required, with no electrical interference.
How does the load-dependent watchdog disable function work?
When the total load current drops below a threshold set by the resistor on WADJ, the internal watchdog circuit disables automatically. This prevents false timeouts during MCU sleep modes where WI pulses cease, eliminating unnecessary wakeups while preserving supervision during active operation.
Is an external capacitor required on the Q (output) pin, and what are its specifications?
Yes - a minimum 10 µF ceramic capacitor with ESR ≤5 Ω must be placed directly at the Q pin. This stabilizes regulation, suppresses high-frequency noise, and ensures transient response meets automotive EMC requirements; tantalum or electrolytic capacitors are not recommended due to ESR and reliability limitations.
TLE4278GXUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- 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 @ 150mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- 12 mA
- PSRR:
- -
- Control Features:
- Reset, Watchdog
- 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-DSO-14-30
TLE4278GXUMA1 FAQ
1.How can I place an order for TLE4278GXUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4278GXUMA1 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 TLE4278GXUMA1 reliable?
The price and inventory of TLE4278GXUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4278GXUMA1 is usually 5 days.
3.What payment methods are accepted for TLE4278GXUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4278GXUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4278GXUMA1?
TLE4278GXUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4278GXUMA1 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 TLE4278GXUMA1?
For technical support, including TLE4278GXUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4278GXUMA1 requirements.
6.How does Aetrix verify that TLE4278GXUMA1 is sourced from the original manufacturer or authorized distributors?
All TLE4278GXUMA1 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 TLE4278GXUMA1 meets industry standards.
7.What is the process for return or replacement of TLE4278GXUMA1?
All TLE4278GXUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4278GXUMA1, 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 TLE4278GXUMA1 part is unused and in its original packaging.
Return procedure for TLE4278GXUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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