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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear + Switching

Infineon Technologies S6BP401AY0SN1B000

Name: S6BP401AY0SN1B000
Brand: Infineon Technologies
SKU: S6BP401AY0SN1B000
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: S6BP401AY0SN1B000

Manufacturer:: Infineon Technologies

Category:: Voltage Regulators - Linear + Switching

Package:: 40-VFQFN Exposed Pad

Datasheet:: S6BP401AY0SN1B000.pdf

Description:: IC REG 6OUT BUCK/LNR SYNC 40QFN

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Product details

Overview

S6BP401AY0SN1B000 from Infineon Technologies (formerly Cypress) is an AEC-Q100 Grade-1 automotive power management IC for ADAS platforms, integrating a quad buck DC/DC converter (2.1 MHz nominal switching frequency, built-in 3 A FETs), dual LDOs, and a digital windowed watchdog timer. It delivers regulated outputs of 1.2–1.575 V / 2 A (DD1), 1.0–1.275 V / 3 A (DD2), 1.2–2.575 V / 2 A (DD3), 3.3–3.4 V / 1 A (DD4), and two LDOs up to 0.5 A, targeting camera ECU and radar sensor power rails.

For engineers reviewing the S6BP401AY0SN1B000 datasheet, S6BP401AY0SN1B000 pinout, S6BP401AY0SN1B000 application, or S6BP401AY0SN1B000 equivalent, key selection criteria include its integrated current-mode buck architecture with load-independent soft-start, AEC-Q100 qualification, 6 mm × 6 mm QFN-40 package, and independent enable/control per channel for safety-critical sequencing in automotive vision systems.

Technical Context

The S6BP401AY0SN1B000 employs a current-mode control architecture across all four buck converters, enabling fast transient response under dynamic load steps typical in image sensor power domains. Each buck channel supports external clock synchronization (1.8–2.4 MHz) or internal oscillator operation (2.0–2.2 MHz), with built-in compensation and preset output voltage selection via internal resistor networks.

Its dual LDOs accept input from 2.97 V to 5.5 V and provide stable low-noise bias for analog front-ends or microcontrollers, while the windowed watchdog timer monitors system firmware execution with configurable timeout and reset assertion-critical for ISO 26262 ASIL-B compliant ADAS subsystems.

Key Specifications

Parameter	Value and Actual Design Meaning
VIN Range	4.5–5.5 V for buck inputs; 2.97–5.5 V for LDO inputs - supports direct connection to automotive 5 V rail with robust brown-out margin.
Switching Frequency	2.1 MHz nominal (1.8–2.4 MHz ext./2.0–2.2 MHz int.) - enables compact 1 µH inductors and reduces EMI in high-density camera modules.
Max Output Current	3 A (DD2), 2 A (DD1/DD3), 1 A (DD4), 0.5 A (LDO2), 0.2 A (LDO1) - matches peak current demands of SoC cores, ISP, and SerDes interfaces.
Output Voltage Accuracy	±1.5% over temp/voltage/load - ensures reliable logic-level compliance for 1.2 V/1.0 V core supplies in automotive-grade processors.
Watchdog Window	Digital windowed WDT with programmable timeout - prevents false resets during valid firmware delays while detecting lockup in real-time vision pipelines.
AEC-Q100 Grade	Grade-1 (−40 °C to +125 °C ambient) - qualified for engine bay–adjacent placement in forward-facing camera ECUs.
Package	6 mm × 6 mm QFN-40 with exposed thermal pad - provides low θ_JA (~35 °C/W) for passive heatsinking in sealed enclosures.

Pinout & Package

Package: 6 mm × 6 mm QFN-40 with exposed thermal pad (EP), designed for automotive thermal reliability and PCB-level mechanical reinforcement via four corner pads (CP1–CP4).

Pin/Terminal	Circuit Role	Design Meaning
EN1–EN4, ENL1–ENL2	Independent enable inputs	Allow precise power-up/down sequencing per rail - essential for avoiding latch-up in multi-rail ADAS SoCs.
FB1–FB4	Buck feedback nodes	Internally tied to preset resistor dividers; no external resistors needed - reduces BOM count and layout area by ~8 components.
PG1–PG4, PGL2	Power-good open-drain outputs	Assert active-low when output is within ±6% regulation window - used for inter-rail dependency monitoring and MCU reset coordination.
LX1–LX4	Switch-node outputs	Drive external inductors directly; require low-ESR ceramic caps and careful layout to minimize EMI in 2.1 MHz switching.
WDI, RST	Watchdog interface	WDI accepts periodic strobes; RST asserts system reset on timeout or window violation - implements fail-safe firmware supervision.
VCC, GND, EP	Main supply and ground	VCC powers analog controller; EP must be soldered to solid ground plane for thermal and EMI performance - not optional.

Key Features

Feature	Design Value
Integrated 3 A FETs per buck channel	Eliminates need for 8 external MOSFETs and gate drivers, reducing board area by >25 mm² and simplifying thermal design.
Load-independent soft-start	Ensures monotonic voltage ramp regardless of output capacitance or load - prevents inrush-induced bus droop in multi-rail systems.
Built-in discharge resistors	Actively discharges outputs during disable to meet ISO 16750-2 transient recovery requirements for automotive restart scenarios.
Independent OCP, OVP, UVLO, TSD	Per-channel fault protection isolates failures - avoids single-point shutdown of entire ADAS power tree during localized overcurrent events.
Preset output voltages	Factory-configured VOUT options (e.g., DD2: 1.000–1.275 V in 25 mV steps) - accelerates design validation without custom resistor networks.

Applications

Forward-Facing Camera ECU

Radar Sensor Module

Use Scenario: Powering 1.0 V core, 1.2 V I/O, and 3.3 V interface rails of a 77 GHz radar SoC with strict startup timing and fault containment.

IC Role / Device Role / Timing Role: Primary PMIC managing all voltage domains, sequencing DD2 (1.0 V/3 A) before DD1 (1.2 V/2 A), then DD4 (3.3 V/1 A), with PG signals enabling next-stage logic.

Use Value: Independent enable/control and per-rail PG outputs ensure deterministic boot order and prevent partial power-up faults that could corrupt radar calibration data.

Use Scenario: Supplying dual-core vision processor (1.2 V/2 A + 1.0 V/3 A), MIPI CSI-2 transceiver (1.8 V LDO), and image sensor bias (3.3 V/1 A) in a surround-view camera node.

IC Role / Device Role / Timing Role: Centralized power hub with windowed WDT supervising vision firmware execution and asserting RST on missed watchdog strobes.

Use Value: Integrated WDT eliminates need for discrete supervisor IC, reducing component count while meeting ASIL-B diagnostic coverage targets for vision processing.

ADAS Domain Controller

Automotive Parking Assist System

Use Scenario: Delivering tightly regulated, low-noise supplies to heterogeneous compute clusters (CPU/GPU/ASIC) and high-speed SerDes links in a centralized ADAS domain controller.

IC Role / Device Role / Timing Role: Quad-buck regulator providing independent, dynamically controllable rails; LDOs clean noise-sensitive analog sensor interfaces.

Use Value: Current-mode architecture and 2.1 MHz switching minimize output ripple (<15 mV_pp) critical for SerDes reference clocks and ADC references.

Use Scenario: Powering ultrasonic parking sensor controller (1.2 V core), LIN transceiver (3.3 V), and analog front-end (1.8 V LDO) in cost-sensitive rear bumper modules.

IC Role / Device Role / Timing Role: Single-chip solution replacing discrete buck + LDO + supervisor, with AEC-Q100 qualification ensuring field reliability at −40 °C.

Use Value: QFN-40 package and integrated passives reduce total solution size by 40% vs. discrete alternatives - critical for space-constrained bumper cavities.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive PMIC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
NXP FS26	3-channel buck + 3-channel LDO; includes embedded safety monitor (ASIL-D ready); no integrated WDT	Targeted at safety-critical domain controllers requiring FMEDA reports and diagnostic libraries	Select FS26 when full ASIL-D decomposition is required; S6BP401AY0SN1B000 suits ASIL-B camera nodes where WDT suffices.
Texas Instruments TPS659412	Quad buck + dual LDO; 2.2 MHz switching; supports I²C configuration and telemetry; no AEC-Q100 Grade-1 rating	Designed for industrial and infotainment use; lacks automotive qualification and watchdog windowing	Choose TPS659412 for non-automotive designs needing programmability; S6BP401AY0SN1B000 is preferred for production ADAS with AEC-Q100 and WDT.

Compared with NXP FS26 and TI TPS659412, the S6BP401AY0SN1B000 offers a balanced integration of AEC-Q100 Grade-1 reliability, hardware-enforced windowed watchdog, and fixed-function simplicity - making it optimal for cost- and safety-conscious ADAS camera and radar modules where configurability is secondary to qualification and fault containment.

Availability

S6BP401AY0SN1B000 is available at Aetrix Electronics and suitable for forward-facing camera ECUs, radar sensor modules, and ADAS domain controllers requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.

Supply support for S6BP401AY0SN1B000 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 specializing in power systems, automotive electronics, and security solutions, with headquarters in Munich, Germany.

The S6BP401AY0SN1B000 belongs to Infineon's automotive PMIC portfolio, engineered specifically for power integrity and functional safety in ADAS vision and sensing systems - emphasizing integration, qualification, and ease of deployment in safety-critical automotive environments.

FAQ

What is the maximum junction temperature and thermal resistance specification for S6BP401AY0SN1B000?

The device is rated for junction temperatures up to +150 °C and features a typical θ_JA of 35 °C/W when mounted on a 4-layer PCB with 200 mm² copper pour connected to the exposed pad. Thermal shutdown activates at +165 °C (±10 °C), and full derating begins above +125 °C ambient per AEC-Q100 Grade-1 limits.

Can the S6BP401AY0SN1B000 support external synchronization across all four buck channels simultaneously?

Yes - the SYNC pin accepts an external clock signal (1.8–2.4 MHz) that synchronizes all four buck converters to a common switching edge, reducing beat-frequency EMI and simplifying filter design. The internal oscillator is disabled automatically when SYNC is driven, and no additional configuration is required for multi-channel lockstep operation.

How does the windowed watchdog timer differ from a standard timeout-based watchdog in S6BP401AY0SN1B000?

The windowed WDT requires strobes to occur within a defined time window - neither too early nor too late - preventing false resets during valid long-latency operations (e.g., flash writes) while still detecting firmware hangs. Standard timeout watchdogs reset on any missed strobe, increasing risk of spurious reboots in complex ADAS software stacks.

Are the preset output voltages factory-programmed or selected via external pins on S6BP401AY0SN1B000?

Output voltages are factory-programmed using laser trimming of internal resistor networks - no external pins, straps, or I²C commands are used for selection. The Y0SN1B000 suffix denotes the specific preset configuration: DD1 = 1.200 V, DD2 = 1.000 V, DD3 = 1.200 V, DD4 = 3.300 V, LD1 = 1.800 V, LD2 = 3.300 V, as confirmed in Infineon's ordering information table.

S6BP401AY0SN1B000 Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: -

Package/Case:: 40-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Topology:: Step-Down (Buck) Synchronous (4), Linear (LDO) (2)

Number of Outputs:: 6

Frequency - Switching:: 2.1MHz

Voltage/Current - Output 1:: 1.5V, 2A

Voltage/Current - Output 2:: 1V, 3A

Voltage/Current - Output 3:: 2.5V, 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)

S6BP401AY0SN1B000 FAQ

1.How can I place an order for S6BP401AY0SN1B000 through Aetrix?

Please submit a Request for Quotation (RFQ) for S6BP401AY0SN1B000 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 S6BP401AY0SN1B000 reliable?

The price and inventory of S6BP401AY0SN1B000 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S6BP401AY0SN1B000 is usually 5 days.

3.What payment methods are accepted for S6BP401AY0SN1B000?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S6BP401AY0SN1B000 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for S6BP401AY0SN1B000?

S6BP401AY0SN1B000 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your S6BP401AY0SN1B000 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 S6BP401AY0SN1B000?

For technical support, including S6BP401AY0SN1B000 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S6BP401AY0SN1B000 requirements.

6.How does Aetrix verify that S6BP401AY0SN1B000 is sourced from the original manufacturer or authorized distributors?

All S6BP401AY0SN1B000 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 S6BP401AY0SN1B000 meets industry standards.

7.What is the process for return or replacement of S6BP401AY0SN1B000?

All S6BP401AY0SN1B000 units undergo pre-shipment inspection (PSI). If there is an issue with S6BP401AY0SN1B000, 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 S6BP401AY0SN1B000 part is unused and in its original packaging.

Return procedure for S6BP401AY0SN1B000:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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