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Infineon Technologies TLF35585QUS01XUMA1
- Part No.:
- TLF35585QUS01XUMA1
- Manufacturer:
- Infineon Technologies
- Category:
- Power Management - Specialized
- Package:
- 48-TQFP Exposed Pad
- Datasheet:
-
TLF35585QUS01XUMA1.pdf
- Description:
- OPTIREG PMIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
TLF35585QUS01 from Infineon is a functional safety-certified PMIC for automotive ASIL D systems, integrating a serial boost-buck pre-regulator (3.0–40 V input), 5.0 V/600 mA microcontroller main supply (QUC), 5.0 V/200 mA communication supply (QCO), ±1% 5.0 V/150 mA ADC reference (QVR), two 150 mA trackers (QT1/QT2), and 5.0 V/10 mA standby rail (QST). It supports 16-bit SPI, dual watchdogs, safe state control, and operates up to 175°C junction temperature in electric power steering and domain controller applications.
For engineers reviewing the TLF35585QUS01 datasheet, TLF35585QUS01 pinout, TLF35585QUS01 application, or TLF35585QUS01 equivalent, key selection criteria include AEC-Q100 Grade 0 qualification, ISO 26262 SEooC certification up to ASIL D, configurable window/functional watchdog timing, voltage monitoring of external core regulators, and PG-TQFP-48-10 package compatibility with high-temperature PCB layouts.
Technical Context
The TLF35585QUS01 implements a cascaded regulation architecture: a wide-input (3.0–40 V) serial step-up/step-down pre-regulator feeds three independent low-dropout post-regulators (QUC, QCO, QVR) and two voltage-following trackers (QT1, QT2). Its supervision subsystem includes dual watchdogs-one time-based window watchdog and one question-answer functional watchdog-plus dedicated error pin monitoring and external core voltage monitoring via VVCI.
Communication and control are handled through a 16-bit SPI interface with chip select (SCS), clock (SCL), MOSI/SDI, MISO/SDO, interrupt (INT), reset (ROT), and sync-out (SYN) signals. Safe State Control provides two programmable-delay outputs (SS1, SS2) for fail-safe MCU coordination, while hardware configuration pins (STU, FRE, SEC) enable flexible pre-regulator mode, switching frequency, and external core regulator enablement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 3.0 V to 40 V - supports direct battery connection across cold-crank (4.5 V) and load-dump (40 V) transients without external protection. |
| QUC output | 5.0 V / 600 mA - supplies primary MCU core logic with tight regulation and thermal derating up to 175°C junction temperature. |
| QVR output | 5.0 V ±1% / 150 mA - precision reference for ADCs and analog sensors requiring stable excitation and measurement accuracy. |
| Watchdog types | Configurable window watchdog (time-triggered) + functional watchdog (challenge-response) - enables dual-layer fault detection per ISO 26262 requirements. |
| Junction temperature | -40°C to +175°C - qualified per AEC-Q100 Grade 0, enabling placement near powertrain or inverter heat sources. |
| Safety certification | ISO 26262 SEooC up to ASIL D - includes safety manual, FMEDA, and diagnostic coverage reports for system-level integration. |
| Package | PG-TQFP-48-10 - 48-pin thermally enhanced thin quad flat pack with exposed thermal pad for automotive under-hood thermal management. |
Pinout & Package
TLF35585QUS01 is housed in a PG-TQFP-48-10 package (48-pin, 7 mm × 7 mm, 0.5 mm pitch, exposed thermal pad). Pin functions are defined per Infineon's official datasheet Rev. 2.01 (2024-09-23), with dedicated rails, monitoring inputs, SPI interface, and safety control signals distributed across four sides for noise isolation and layout optimization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VQUC | Microcontroller main supply output | 5.0 V / 600 mA regulated LDO output; primary power rail for MCU core logic and I/O banks. |
| VQCO | Communication supply output | 5.0 V / 200 mA LDO output; powers CAN/FlexRay transceivers and isolated communication interfaces. |
| VQVR | Voltage reference output | 5.0 V ±1% / 150 mA precision reference; feeds ADC references and sensor excitation circuits. |
| QT1, QT2 | Sensor tracker outputs | Two 150 mA voltage-following outputs tracking VQVR; supply off-board analog sensors with matched reference stability. |
| VQST | Standby supply output | 5.0 V / 10 mA always-on LDO; maintains real-time clock, wake-up logic, and low-power MCU retention during sleep. |
| VVS1 | Main input supply | Primary 3.0–40 V input to boost-buck pre-regulator; connects directly to vehicle battery (T30/T15). |
| ENA, WAK | Enable and wake inputs | Dual asynchronous wake inputs (IGN, INH); support fast startup and controlled entry into active mode. |
| SS1, SS2 | Safe state outputs | Two open-drain outputs with programmable delay; signal MCU to enter predefined safe states on fault detection. |
| SCS, SCL, SDI, SDO | SPI interface | 16-bit full-duplex SPI with chip select, clock, MOSI, MISO; enables register read/write, status polling, and configuration updates. |
| INT, ROT, ERR | Supervision signals | Interrupt (fault event), reset (asynchronous MCU reset), and error pin (external device fault reporting) for layered diagnostics. |
Key Features
| Feature | Design Value |
|---|---|
| Serial boost-buck pre-regulator | Enables single-stage wide-input conversion (3.0–40 V) with <15% total power loss at 12 V input and full load, eliminating need for external buck-boost ICs. |
| Dual watchdog architecture | Independent window watchdog (timing-based timeout) and functional watchdog (challenge-response handshake) provide redundant fault detection paths per ASIL D decomposition. |
| External core voltage monitor | VVCI input monitors optional external SMPS core supply (e.g., 1.3 V MCU core); triggers error flag if out-of-window, enabling coordinated safe shutdown. |
| PRO-SIL™ safety documentation | Includes certified FMEDA, safety manual, and diagnostic coverage report - reduces system integrator effort for ISO 26262 compliance up to ASIL D. |
| Thermal robustness | Rated for continuous operation at 175°C junction temperature with full electrical performance; validated per AEC-Q100 Grade 0 test profile. |
Applications
| Electric Power Steering (EPS) | Battery Management System (BMS) |
|---|---|
|
Use Scenario: High-reliability power delivery and supervision for EPS motor controllers operating in engine bay environments with extreme thermal cycling and voltage transients. IC Role / Device Role / Timing Role: Primary PMIC supplying MCU, gate drivers, and position sensors while monitoring external 1.2 V core rail and triggering safe torque reduction on fault. Use Value: Eliminates discrete LDOs and supervisors; reduces BOM count by 7 components and improves ASIL D fault coverage by integrating dual watchdogs and safe state outputs. |
Use Scenario: Centralized power management for BMS master controllers in 48 V mild-hybrid and traction battery packs, where long-term reliability and thermal resilience are critical. IC Role / Device Role / Timing Role: Supplies MCU, isolated CAN, and cell-monitoring ADCs while tracking reference voltage for precise voltage measurement across 100+ cells. Use Value: ±1% QVR reference ensures <0.5% total measurement error in SOC estimation; QT1/QT2 trackers maintain sensor bias stability over -40°C to +125°C ambient. |
| Engine Control Unit (ECU) | Automotive Domain Controller |
|
Use Scenario: Powering next-generation engine ECUs with multi-core MCUs, high-speed communication interfaces, and real-time safety monitoring in under-hood locations. IC Role / Device Role / Timing Role: Delivers QUC (MCU core), QCO (CAN FD), and QVR (fuel injector driver ADC) while synchronizing switching regulators via SYN pin to reduce EMI. Use Value: SYNC_OUT pin enables phase-aligned switching of external DC-DC converters, lowering peak current demand and improving conducted emissions by >10 dBμV. |
Use Scenario: Consolidated power and safety management for zonal or central domain controllers integrating ADAS, infotainment, and vehicle networking functions. IC Role / Device Role / Timing Role: Provides independent power domains (QUC, QCO, QVR, QT1/QT2) with centralized supervision (SPI-configurable watchdogs, SS1/SS2, INT) for multi-SoC coordination. Use Value: Single-chip solution replaces 3–4 discrete PMICs and supervisors; reduces PCB area by 35% and enables unified safety state signaling across heterogeneous compute domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar functional safety PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NXP FS26 | Integrated 3.3 V/2 A core rail + 5 V/1 A IO rail; no external core monitor input; uses SPI+FSI dual interface; lower max junction temp (150°C). | Targeted at mid-tier ASIL B/C domain controllers; lacks VVCI input and QT1/QT2 trackers for sensor reference fidelity. | Select when higher core current (>600 mA) is required and external core monitoring is not needed; verify thermal margin below 150°C. |
| Renesas ISL783xx series | Separate boost + buck pre-regulators (not serial); QVR accuracy ±2%; no integrated functional watchdog; requires external window watchdog IC. | Suitable for ASIL B systems with simpler supervision; lacks PRO-SIL™ documentation and ASIL D FMEDA. | Choose for cost-sensitive ASIL B designs where ±2% reference tolerance is acceptable and dual watchdogs are implemented externally. |
Compared with NXP FS26 and Renesas ISL783xx, TLF35585QUS01 uniquely combines ASIL D SEooC certification, ±1% QVR reference, VVCI-based external core monitoring, and dual watchdogs in a single PG-TQFP-48 package-enabling higher-integrity power architectures without external supervision components.
Availability
TLF35585QUS01 is available at Aetrix Electronics and suitable for electric power steering, battery management, and domain control applications requiring stable component supply, AEC-Q100 Grade 0 qualification, and ISO 26262 ASIL D safety compliance.
Supply support for TLF35585QUS01 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 electronics, and industrial control ICs, with global R&D and manufacturing infrastructure.
The OPTIREG™ PMIC product line delivers functional safety-certified power solutions for automotive applications, designed specifically to meet AEC-Q100 Grade 0 and ISO 26262 ASIL D requirements in demanding powertrain and chassis systems.
FAQ
What is the maximum allowable input voltage transient for TLF35585QUS01?
The absolute maximum input voltage (VVS1) is 40 V continuously, with short-duration tolerance up to 43.5 V for ≤10 s over product lifetime. Transient events exceeding 40 V must be limited to ≤6 V/ms slew rate to remain within 60 V rating for up to 1 hour. These limits are defined in Table 1 of the Rev. 2.01 datasheet and validated per AEC-Q100 stress testing.
How does the functional watchdog differ from the window watchdog in TLF35585QUS01?
The functional watchdog requires periodic challenge-response exchanges via SPI (e.g., read/write specific registers with correct values), detecting firmware hangs or logic corruption. The window watchdog enforces strict time boundaries on MCU service intervals using internal timers. Both operate independently and can trigger separate safe states (SS1/SS2), satisfying ASIL D requirement for diverse fault detection mechanisms.
Can TLF35585QUS01 supply a 1.3 V MCU core rail directly?
No - TLF35585QUS01 does not integrate a 1.3 V output. It provides VQUC (5.0 V/600 mA) for MCU I/O and peripherals, and includes VVCI input to monitor an external 1.3 V core supply (e.g., from a discrete DC-DC converter). The VEVC pin enables that external regulator, and fault on VVCI triggers ERR and safe state outputs.
Is the PG-TQFP-48-10 package RoHS-compliant and lead-free?
Yes - TLF35585QUS01 is marked as a Green Product and fully RoHS-compliant (2011/65/EU), with lead-free terminations and halogen-free molding compound. The package meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020D.2 standards.
TLF35585QUS01XUMA1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- OPTIREG™
- Package/Case:
- 48-TQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- -
- Voltage - Supply:
- 3V ~ 40V
- Operating Temperature:
- -40°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PG-TQFP-48-10
TLF35585QUS01XUMA1 FAQ
1.How can I place an order for TLF35585QUS01XUMA1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLF35585QUS01XUMA1 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 TLF35585QUS01XUMA1 reliable?
The price and inventory of TLF35585QUS01XUMA1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLF35585QUS01XUMA1 is usually 5 days.
3.What payment methods are accepted for TLF35585QUS01XUMA1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLF35585QUS01XUMA1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLF35585QUS01XUMA1?
TLF35585QUS01XUMA1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLF35585QUS01XUMA1 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 TLF35585QUS01XUMA1?
For technical support, including TLF35585QUS01XUMA1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLF35585QUS01XUMA1 requirements.
6.How does Aetrix verify that TLF35585QUS01XUMA1 is sourced from the original manufacturer or authorized distributors?
All TLF35585QUS01XUMA1 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 TLF35585QUS01XUMA1 meets industry standards.
7.What is the process for return or replacement of TLF35585QUS01XUMA1?
All TLF35585QUS01XUMA1 units undergo pre-shipment inspection (PSI). If there is an issue with TLF35585QUS01XUMA1, 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 TLF35585QUS01XUMA1 part is unused and in its original packaging.
Return procedure for TLF35585QUS01XUMA1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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