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Infineon Technologies TLE4473GV55AUMA1
- Part No.:
- TLE4473GV55AUMA1
- Manufacturer:
- Infineon Technologies
- Package:
- 12-BSOP (0.295", 7.50mm Width) Exposed Pad
- Datasheet:
-
TLE4473GV55AUMA1.pdf
- Description:
- IC REG LIN 5V/TRACKING DSO12-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,781
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Product details
Overview
TLE4473GV55AUMA1 from Infineon Technologies is a dual low-dropout voltage regulator IC for automotive microcontroller and sensor power supply, featuring two independent 5 V ±2% outputs (Q1: 300 mA tracked to Q2; Q2: 190 mA), integrated watchdog and dual reset circuits, wide 5.6–42 V input range, and operation from −40 °C to +150 °C.
For engineers reviewing the TLE4473GV55AUMA1 datasheet, TLE4473GV55AUMA1 pinout, TLE4473GV55AUMA1 application, or TLE4473GV55AUMA1 equivalent, this device supports critical automotive subsystems requiring fault-tolerant dual-rail regulation, programmable reset timing, and watchdog supervision under harsh thermal and electrical conditions.
Technical Context
The TLE4473GV55AUMA1 implements a tracking architecture where the main output Q1 is regulated to precisely follow the stand-by output Q2 voltage, ensuring tight inter-rail stability. It integrates two independent reset generators with externally adjustable delay capacitors (D1, D2) and a positive-edge-triggered watchdog input (WI) tied to RO2 behavior.
Protection includes short-circuit current limiting on both outputs, overtemperature shutdown, overload detection, and separate inhibit control (INH1/INH2) enabling three power states: Q1-only, Q2-only, or full disable (<1 µA quiescent). The P-DSO-12-6 package features an exposed heat slug connected to GND for thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 5.6 V to 42 V - supports direct battery connection in 12 V/24 V automotive systems including load dump transients. |
| Stand-by Output (Q2) | 190 mA at 5.0 V ±2% - powers always-on circuits (e.g., CAN transceivers, real-time clocks) with stable low-power rail. |
| Main Output (Q1) | 300 mA at 5.0 V tracked to Q2 - supplies microcontrollers with rail-to-rail voltage correlation for deterministic reset sequencing. |
| Quiescent Current | <1 µA in full inhibit mode - enables ultra-low-power sleep states required for ECU battery drain compliance. |
| Reset Threshold (Q1) | Typ. 4.65 V - triggers RO1 when Q1 drops below specification, allowing precise brown-out detection before MCU malfunction. |
| Watchdog Timeout | Adjustable via D2 capacitor (e.g., 100 nF → ~34 ms) - provides configurable supervision window for MCU firmware health checks. |
| Operating Temperature | −40 °C to +150 °C junction - qualified for under-hood engine control module placement without derating. |
Pinout & Package
P-DSO-12-6 package with exposed heat slug (Pin 6 and slug must be connected to GND for thermal and electrical integrity).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 WI | Watchdog input | Positive-edge-triggered signal from MCU; resets watchdog timer discharge cycle to maintain RO2 high. |
| 2 RO1 | Reset output for Q1 | Open-collector output asserting low during Q1 undervoltage or power-on delay; drives external reset line. |
| 3 RO2 | Reset output for Q2 | Open-collector output asserting low during Q2 undervoltage or watchdog timeout; used for system-level reset coordination. |
| 4 Q2 | Stand-by output | 190 mA regulated 5 V rail; requires ≥10 µF tantalum capacitor (ESR <5 Ω) for loop stability. |
| 5 Q1 | Main output | 300 mA 5 V rail tracked to Q2; requires ≥10 µF tantalum capacitor (ESR <3 Ω) to prevent oscillation. |
| 6 N.C. | No connect | Internally unused; must be connected to GND per layout guidelines for thermal and EMI performance. |
| 7 I | Input voltage | Primary power input (5.6–42 V); requires local 100 nF ceramic + bulk electrolytic (47–220 µF) decoupling. |
| 8 INH1 | Inhibit 1 | Active-low control disabling only Q1; internal pull-down enables default Q1-off state on power-up. |
| 9 INH2 | Inhibit 2 | Active-low control disabling both Q1 and Q2 when asserted with INH1; achieves <1 µA standby current. |
| 10 D1 | Reset delay 1 | Connects to GND via capacitor setting Q1 reset timeout (e.g., 100 nF → ~34 ms power-on delay). |
| 11 D2 | Reset delay 2 / WD timing | Shared node for Q2 reset delay and watchdog timing; capacitor value directly sets both functions. |
| 12 GND | Ground reference | Common return path for all circuits; must be low-impedance connection to PCB ground plane and heat slug. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent reset generators | Separately configurable delay times via external D1/D2 capacitors - enables staggered power-up of MCU and peripheral rails. |
| Integrated watchdog circuit | Monitors MCU activity via WI pin and asserts RO2 low if no edge occurs within programmed window - prevents runaway firmware execution. |
| Three-state inhibit logic | INH1/INH2 combination allows selective Q1 disable, full disable, or normal operation - supports flexible ECU power modes (run, standby, sleep). |
| Thermal and fault protection | Automatic shutdown on overtemperature (>150 °C), short-circuit, or overload - preserves device integrity during fault events without external components. |
| Automotive-grade qualification | AEC-Q100 Grade 0 (−40 °C to +150 °C) - validated for engine compartment deployment in safety-critical applications. |
Applications
| Engine Control Unit (ECU) Power Management | Body Control Module (BCM) Sensor Supply |
|---|---|
Use Scenario: Regulating power for 32-bit MCU, CAN controller, and analog front-end in gasoline/diesel engine ECUs. IC Role / Device Role / Timing Role: Dual-rail LDO providing synchronized 5 V rails with coordinated reset and watchdog supervision. Use Value: Ensures deterministic boot sequence and runtime supervision under cranking (5.6 V) and load dump (42 V) conditions. | Use Scenario: Supplying door lock actuators, ambient light sensors, and LIN transceivers in BCMs. IC Role / Device Role / Timing Role: Stand-by output powers always-on LIN bus; main output powers MCU only during active cycles. Use Value: Reduces quiescent current to <1 µA in sleep mode while maintaining fast wake-up capability via RO2 assertion. |
| Advanced Driver Assistance Systems (ADAS) Camera Module | Electric Power Steering (EPS) Motor Control |
Use Scenario: Powering image sensor, ISP, and communication interface in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Q2 supplies always-on clock and memory; Q1 powers imaging pipeline with reset-synchronized startup. Use Value: Prevents image corruption during voltage transients by holding reset until both rails stabilize within tolerance. | Use Scenario: Supplying MCU, gate driver bias, and position sensor in EPS motor control units. IC Role / Device Role / Timing Role: Tracks Q1 to Q2 to eliminate rail skew that could cause timing violations in PWM generation. Use Value: Maintains functional safety integrity (ISO 26262 ASIL-B) through redundant reset paths and watchdog coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output automotive LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV70733PDPWR | Single 3.3 V output (300 mA), no watchdog/reset, max 5.5 V input, −40 °C to +125 °C | Lacks dual-rail tracking, reset coordination, and automotive transient robustness | Select only for non-automotive, low-voltage, single-rail applications with no safety requirements |
| MAX16910ATP/V+T | Dual 5 V/3.3 V outputs (250/150 mA), integrated watchdog, 4.5–28 V input, −40 °C to +125 °C | Lower input voltage ceiling and junction temperature rating than TLE4473GV55AUMA1 | Consider for cost-sensitive ADAS modules where 28 V max input and 125 °C operation suffice |
Compared with TLV70733PDPWR and MAX16910ATP/V+T, the TLE4473GV55AUMA1 uniquely supports 42 V input, 150 °C operation, and true Q1-to-Q2 tracking-making it irreplaceable for high-reliability engine bay applications demanding full AEC-Q100 Grade 0 compliance.
Availability
TLE4473GV55AUMA1 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera systems, and electric power steering systems requiring stable component supply across extended automotive temperature and voltage ranges.
Supply support for TLE4473GV55AUMA1 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 automotive qualification infrastructure.
The TLE4473 product line delivers highly integrated dual-LDO regulators with built-in supervision functions specifically for automotive electronic control units operating under extreme electrical and thermal stress.
FAQ
What is the function of Pin 6 (N.C.) on the TLE4473GV55AUMA1?
Pin 6 is internally not connected but must be externally tied to GND per Infineon's layout guidelines. This connection ensures optimal thermal dissipation through the exposed heat slug and reduces electromagnetic interference by stabilizing the internal ground reference plane.
Can the watchdog and reset delay timing be set independently for Q1 and Q2?
Yes - D1 capacitor sets Q1 reset delay only, while D2 capacitor simultaneously configures both Q2 reset delay and watchdog timeout. The watchdog function is exclusive to the Q2 channel and uses the same timing network as its reset generator.
What capacitor types and ESR limits are required for stable operation?
Tantalum capacitors are recommended: ≥10 µF with ESR <3 Ω for Q1, ≥10 µF with ESR <5 Ω for Q2, and ≥100 nF ceramic at the input. These values ensure phase margin >45° across −40 °C to +150 °C and prevent oscillation under dynamic load steps.
How does the inhibit logic behave when only INH1 is pulled low?
When only INH1 is low (INH2 high), the main output Q1 is disabled while the stand-by output Q2 remains active. This configuration supports partial system shutdown - for example, keeping CAN bus alive while powering down the main MCU core.
TLE4473GV55AUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 12-BSOP (0.295", 7.50mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 5V, Tracking
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.6V @ 100mA, 0.6V @ 200mA
- Current - Output:
- 190mA, 300mA
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- 20 mA
- PSRR:
- 65dB (100Hz), 65dB (100Hz)
- Control Features:
- Inhibit, 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:
- P-DSO-12-6
TLE4473GV55AUMA1 FAQ
1.How can I place an order for TLE4473GV55AUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLE4473GV55AUMA1 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 TLE4473GV55AUMA1 reliable?
The price and inventory of TLE4473GV55AUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLE4473GV55AUMA1 is usually 5 days.
3.What payment methods are accepted for TLE4473GV55AUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLE4473GV55AUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLE4473GV55AUMA1?
TLE4473GV55AUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLE4473GV55AUMA1 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 TLE4473GV55AUMA1?
For technical support, including TLE4473GV55AUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLE4473GV55AUMA1 requirements.
6.How does Aetrix verify that TLE4473GV55AUMA1 is sourced from the original manufacturer or authorized distributors?
All TLE4473GV55AUMA1 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 TLE4473GV55AUMA1 meets industry standards.
7.What is the process for return or replacement of TLE4473GV55AUMA1?
All TLE4473GV55AUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLE4473GV55AUMA1, 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 TLE4473GV55AUMA1 part is unused and in its original packaging.
Return procedure for TLE4473GV55AUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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