Infineon Technologies S6BP401AL2SN1B000

Overview

S6BP401AL2SN1B000 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 operates from 4.5–5.5 V input, delivers preset output voltages including 1.2 V/2 A, 1.0 V/3 A, 1.2–2.575 V/2 A, and 3.3–3.4 V/1 A, and features built-in FETs, compensation, and power-good monitoring.

For engineers reviewing the S6BP401AL2SN1B000 datasheet, S6BP401AL2SN1B000 pinout, S6BP401AL2SN1B000 application, or S6BP401AL2SN1B000 equivalent, key selection criteria include its quad-buck + dual-LDO architecture, 2.1 MHz switching frequency with internal clock mode, AEC-Q100 Grade-1 qualification, integrated watchdog timer, and QFN-40 6 mm × 6 mm package with exposed thermal pad.

Technical Context

The S6BP401AL2SN1B000 employs current-mode control across all four buck regulators, enabling fast load transient response and stable operation under varying output conditions. Each buck channel supports independent enable control, soft-start, discharge resistors, and dedicated power-good (PG) outputs with under-voltage (94–95.5%) and over-voltage (106%) thresholds.

Its dual LDOs accept 2.97–5.5 V input and provide fixed or resistor-programmable outputs; the integrated windowed watchdog timer accepts external trigger pulses via WDI and asserts RST on timeout or window violation. All protection functions-including UVLO, OCP, OVP, and thermal shutdown-are implemented in hardware with no firmware dependency.

Key Specifications

Pinout & Package

Package: QFN-40, 6 mm × 6 mm, 0.5 mm pitch, with exposed thermal pad (EP) and four corner pads (CP1–CP4) for mechanical reinforcement and thermal conduction. Requires PCB ground plane connection to EP and CPs for thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ4436-AEC1 and TPS65381A-Q1, the S6BP401AL2SN1B000 uniquely integrates quad high-current bucks, dual LDOs, and a windowed watchdog in a single AEC-Q100 Grade-1 package-enabling compact, safety-compliant power delivery for multi-rail ADAS vision systems without external support ICs.

Availability

S6BP401AL2SN1B000 is available at Aetrix Electronics and suitable for front-facing camera modules, radar signal processors, surround-view ECUs, and in-cabin driver monitoring systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.

Supply support for S6BP401AL2SN1B000 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 management, automotive, and industrial control solutions with deep expertise in functional safety and reliability engineering.

The S6BP401AL2SN1B000 belongs to Infineon's automotive PMIC portfolio, designed specifically to consolidate power delivery for multi-rail ADAS sensor fusion platforms while meeting ASIL-B timing and diagnostic requirements.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The S6BP401AL2SN1B000 has a maximum junction temperature of +150 °C, with thermal shutdown activated at this threshold. Its AEC-Q100 Grade-1 rating guarantees operation from −40 °C to +125 °C ambient, and thermal performance depends on PCB copper area, EP soldering quality, and airflow. Derating curves in the datasheet define current limits above 100 °C ambient.

Can the watchdog timer be disabled or bypassed?

No-the windowed watchdog timer is always active and cannot be disabled. The WDI pin must be toggled within the programmed window period; failure to do so asserts the RST output. There is no hardware disable pin or register setting. This design enforces fail-safe behavior required for ASIL-B systems where watchdog omission would violate safety goals.

Are the preset output voltages factory-programmed or resistor-configurable?

The S6BP401AL2SN1B000 supports both modes: factory-preset voltages (e.g., 1.000 V, 1.200 V, 3.300 V) are selected via internal resistor ladders, while external feedback resistors on FB1–FB4 allow fine-tuning or custom values. Internal resistors reduce BOM cost when standard voltages meet design needs; external configuration retains full flexibility for non-standard rails.

Does the device support power sequencing between rails?

Yes-each buck (EN1–EN4) and LDO (ENL1–ENL2) has an independent enable input, allowing external GPIO or power sequencer IC to control turn-on/turn-off order. No internal hardware sequencing logic exists, but the design enables precise, programmable sequencing critical for SoC and FPGA power-up requirements in ADAS applications.