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Infineon Technologies S6BP401AB1SN1B000
- Part No.:
- S6BP401AB1SN1B000
- Manufacturer:
- Infineon Technologies
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
S6BP401AB1SN1B000.pdf
- Description:
- IC REG 6OUT BUCK/LNR SYNC 40QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
S6BP401AB1SN1B000 from Infineon Technologies (formerly Cypress) is an AEC-Q100 Grade-1 automotive power management IC for ADAS platforms, integrating quad 2.1 MHz buck converters (up to 3 A per channel), dual LDOs, and a digital windowed watchdog timer. It supports input voltage ranges of 4.5–5.5 V (buck) and 2.97–5.5 V (LDO), delivers preset output voltages from 1.00 V to 3.40 V across six regulated rails, and operates in camera systems and radar modules requiring high transient response and functional safety monitoring.
For engineers reviewing the S6BP401AB1SN1B000 datasheet, S6BP401AB1SN1B000 pinout, S6BP401AB1SN1B000 application, or S6BP401AB1SN1B000 equivalent, key selection criteria include its quad-buck + dual-LDO architecture, built-in current-mode control for fast load transients, integrated soft-start and discharge resistors, AEC-Q100 qualification, and 6 mm × 6 mm QFN-40 package with exposed thermal pad.
Technical Context
The S6BP401AB1SN1B000 implements current-mode control across all four buck regulators, enabling sub-2 µs load transient recovery and stable operation with ceramic output capacitors. Its internal switching FETs support up to 3 A per buck channel, and the 2.1 MHz nominal switching frequency allows compact external inductor sizing while maintaining >90% peak efficiency at mid-load conditions.
The device integrates a windowed watchdog timer with WDI input and RST output, independent enable/control per rail, power-good monitors for all six outputs, and protection features including UVLO (4.25 V typ), OCP, OVP (±6% threshold), and thermal shutdown. All LDOs and bucks feature load-independent soft-start and built-in discharge paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range (Buck) | 4.5 V to 5.5 V - Supports direct connection to automotive 5 V rail with margin for ripple and drop. |
| VIN Range (LDO) | 2.97 V to 5.5 V - Enables flexible input sourcing from buck outputs or main supply. |
| Switching Frequency | 2.1 MHz nominal (1.8–2.4 MHz ext. sync) - Enables <1 µH inductors and reduces EMI fundamental below 10 MHz. |
| Max Output Current | 3 A (DD2), 2 A (DD1/DD3), 1 A (DD4), 0.5 A (LD2), 0.2 A (LD1) - Matches typical SoC core, I/O, memory, and sensor rail requirements. |
| Output Voltage Accuracy | ±1.5% over temp & line - Ensures reliable logic-level compliance for automotive processors and image sensors. |
| Watchdog Window | Digital windowed type with programmable timeout - Detects both early and late resets to prevent silent firmware lockup. |
| AEC-Q100 Grade | Grade-1 (−40 °C to +125 °C ambient) - Qualified for under-hood and camera module mounting locations. |
Pinout & Package
Package: 6 mm × 6 mm QFN-40 with exposed thermal pad (EP), lead-free and RoHS-compliant. Thermal pad must be soldered to PCB ground plane for safe operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1–EN4, ENL1–ENL2 | Independent enable inputs | Allow sequenced power-up/down of each rail without external logic or timing components. |
| FB1–FB4, PVCCL1–PVCCL2 | Feedback and input supply terminals | Support preset output voltages via internal resistor dividers; no external resistors required for standard configurations. |
| PG1–PG4, PGL2 | Power-good open-drain outputs | Provide asynchronous status flags for system monitoring and fault-handling logic (e.g., MCU reset assertion). |
| LX1–LX4 | Switch-node outputs | Connect directly to external inductors; require low-ESR ceramic caps and careful layout to minimize EMI and ringing. |
| WDI, RST | Watchdog interface | WDI accepts periodic pulses; RST asserts low on timeout or window violation - connects directly to SoC reset input. |
| VCC, GND, EP | Main supply, analog ground, thermal pad | VCC powers internal analog controller; EP must be connected to solid ground plane for thermal dissipation and noise reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Quad buck with integrated 3 A FETs | Eliminates 8 external MOSFETs and gate drivers, reducing BOM count and board area by >30% vs discrete solutions. |
| Current-mode control architecture | Enables <5 µs load transient recovery time and inherent cycle-by-cycle overcurrent limiting without slope compensation. |
| Built-in soft-start & discharge resistors | Prevents inrush current during startup and ensures controlled rail discharge during shutdown - no external RC networks needed. |
| Windowed watchdog timer | Monitors firmware execution timing with configurable window; prevents false triggers from jitter and detects hang/freeze conditions reliably. |
| AEC-Q100 Grade-1 qualification | Validated for continuous operation at 125 °C junction temperature - suitable for front-end ADAS camera housings near headlights or grilles. |
Applications
| Radar Sensor Module | ADAS Camera ECU |
|---|---|
Use Scenario: Powering 77 GHz radar transceiver SoC, RF front-end, and CAN FD interface in compact front-bumper module. IC Role / Device Role / Timing Role: Primary PMIC delivering 1.0 V (core), 1.2 V (I/O), 1.8 V (memory), and 3.3 V (interface) rails with synchronized power sequencing. Use Value: Integrated PG signals and watchdog enable autonomous fault detection and safe shutdown without host MCU intervention. | Use Scenario: Supplying image signal processor (ISP), CMOS image sensor, and Ethernet AVB PHY in rear-view or surround-view camera head. IC Role / Device Role / Timing Role: Provides six independent, monitored rails with tight voltage accuracy and fast transient response to handle burst-mode sensor readout. Use Value: 2.1 MHz switching frequency enables use of 0805-size inductors and <100 µF total ceramic output capacitance per rail. |
| Automotive Display Cluster | In-Cabin Driver Monitoring System |
Use Scenario: Powering graphics processor, display driver, and touch controller in digital instrument cluster with HUD integration. IC Role / Device Role / Timing Role: Delivers 1.2 V (GPU), 1.8 V (DDR), 3.3 V (LVDS), and 5 V (backlight boost) via buck + LDO combination. Use Value: Dual LDOs supply low-noise analog/PLL rails while bucks handle high-current digital domains - minimizing cross-rail coupling. | Use Scenario: Supporting IR illumination LED driver, NIR sensor, and AI inference accelerator in steering-wheel or overhead console-mounted DMS. IC Role / Device Role / Timing Role: Supplies 1.2 V (NPU core), 1.5 V (sensor interface), 3.3 V (LED driver bias), and 1.8 V (watchdog-triggered safety monitor). Use Value: Built-in windowed watchdog meets ASIL-B diagnostic coverage requirements for real-time driver attention monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4436-AEC1 | Single 3 A buck with external FET drive; no integrated LDOs or watchdog. | Lacks multi-rail integration and functional safety features - requires companion ICs for full ADAS power tree. | Choose when only one high-current rail is needed and system-level watchdog is handled elsewhere. |
| TPS659413-Q1 | Quad buck + triple LDO + integrated PMIC sequencer; no windowed watchdog; larger 7 mm × 7 mm package. | Offers more LDO channels but lacks dedicated windowed watchdog - relies on external safety monitor or MCU-based checking. | Prefer when complex sequencing and higher LDO count outweigh need for hardware-enforced watchdog windowing. |
Compared with MPQ4436-AEC1 and TPS659413-Q1, the S6BP401AB1SN1B000 uniquely combines quad buck regulation, dual LDOs, and a hardware windowed watchdog in a single AEC-Q100 Grade-1 QFN-40 package - simplifying safety-critical ADAS power design without external supervision circuitry.
Availability
S6BP401AB1SN1B000 is available at Aetrix Electronics and suitable for automotive radar modules, ADAS camera ECUs, digital instrument clusters, and in-cabin driver monitoring systems requiring stable component supply, long-term lifecycle support, and AEC-Q100 compliance.
Supply support for S6BP401AB1SN1B000 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 global semiconductor leader headquartered in Munich, Germany, specializing in power systems, automotive electronics, and security solutions.
The S6BP401AB1SN1B000 belongs to Infineon's automotive PMIC portfolio, designed specifically to consolidate power delivery and functional safety monitoring for next-generation ADAS sensor nodes and vision processing units.
FAQ
What is the maximum junction temperature rating for S6BP401AB1SN1B000?
The S6BP401AB1SN1B000 is rated for AEC-Q100 Grade-1 operation, with a maximum junction temperature of +150 °C and guaranteed functionality from −40 °C to +125 °C ambient. Thermal derating begins above 105 °C ambient, and the internal thermal shutdown activates at approximately +165 °C junction temperature to protect the die.
Can the S6BP401AB1SN1B000 operate without external feedback resistors?
Yes - the device uses factory-trimmed internal resistor dividers to set all output voltages. For standard configurations (e.g., DD1 = 1.20 V, DD2 = 1.00 V), no external feedback resistors are required. Only non-standard voltages or fine-tuning necessitate external resistor networks connected to FB pins.
How does the windowed watchdog timer function differ from a standard timeout watchdog?
The S6BP401AB1SN1B000 implements a true windowed watchdog: the WDI pulse must occur within a defined lower and upper time boundary. Pulses arriving too early (e.g., due to runaway loops) or too late (e.g., firmware hang) both trigger RST assertion - unlike basic timeout watchdogs that only detect late pulses.
Is the exposed pad (EP) electrically connected to ground internally?
No - the exposed pad is not internally connected to any circuit node. It must be externally soldered to the PCB ground plane solely for thermal conduction and mechanical stability. Connecting EP to any voltage other than ground violates the absolute maximum ratings and may cause permanent damage.
S6BP401AB1SN1B000 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) Synchronous (4), Linear (LDO) (2)
- Number of Outputs:
- 6
- Frequency - Switching:
- 2.1MHz
- Voltage/Current - Output 1:
- 1.25V, 2A
- Voltage/Current - Output 2:
- 1.25V, 3A
- Voltage/Current - Output 3:
- 1.25V, 2A
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.97V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-QFN (6x6)
S6BP401AB1SN1B000 FAQ
1.How can I place an order for S6BP401AB1SN1B000 through Aetrix?
Please submit a Request for Quotation (RFQ) for S6BP401AB1SN1B000 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 S6BP401AB1SN1B000 reliable?
The price and inventory of S6BP401AB1SN1B000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S6BP401AB1SN1B000 is usually 5 days.
3.What payment methods are accepted for S6BP401AB1SN1B000?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S6BP401AB1SN1B000 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S6BP401AB1SN1B000?
S6BP401AB1SN1B000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S6BP401AB1SN1B000 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 S6BP401AB1SN1B000?
For technical support, including S6BP401AB1SN1B000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S6BP401AB1SN1B000 requirements.
6.How does Aetrix verify that S6BP401AB1SN1B000 is sourced from the original manufacturer or authorized distributors?
All S6BP401AB1SN1B000 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 S6BP401AB1SN1B000 meets industry standards.
7.What is the process for return or replacement of S6BP401AB1SN1B000?
All S6BP401AB1SN1B000 units undergo pre-shipment inspection (PSI). If there is an issue with S6BP401AB1SN1B000, 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 S6BP401AB1SN1B000 part is unused and in its original packaging.
Return procedure for S6BP401AB1SN1B000:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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