Infineon Technologies S6BP401AL0SN1B000

Overview

S6BP401AL0SN1B000 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 for bucks and 2.97–5.5 V for LDOs, delivers preset output voltages from 1.00 V to 3.40 V, and operates in a compact 6 mm × 6 mm QFN-40 package.

For engineers reviewing the S6BP401AL0SN1B000 datasheet, S6BP401AL0SN1B000 pinout, S6BP401AL0SN1B000 application, or S6BP401AL0SN1B000 equivalent, key selection criteria include channel-specific soft-start timing (200 ms at 2.1 MHz), independent enable control per regulator, power-good monitoring per output, thermal shutdown, and UVLO/OVP/OCP protection compliance with automotive safety requirements.

Technical Context

The S6BP401AL0SN1B000 employs current-mode control architecture across all four buck converters, enabling fast load transient response and stable operation up to 2.4 MHz switching frequency. Each buck integrates high-side and low-side MOSFETs rated for 3 A continuous output current, with built-in compensation and preset feedback resistors reducing external component count.

The dual LDOs support wide input range (2.97–5.5 V) and deliver fixed or resistor-programmable outputs; the integrated windowed watchdog timer accepts external trigger pulses on WDI and asserts RST upon timeout or invalid windowing, supporting ASIL-B–capable system monitoring in camera and radar modules.

Key Specifications

Pinout & Package

Package: 6 mm × 6 mm QFN-40 with exposed thermal pad (EP) and four corner pads (CP1–CP4), all requiring PCB ground plane connection for thermal and EMI performance.

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 S6BP401AL0SN1B000 uniquely combines quad independent bucks, dual LDOs, per-output power-good, and windowed WDT in a single AEC-Q100 Grade-1 package - essential for complex ADAS domain controllers requiring autonomous power sequencing and fault containment.

Availability

S6BP401AL0SN1B000 is available at Aetrix Electronics and suitable for automotive radar modules, ADAS camera ECUs, and digital instrument clusters requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant power delivery.

Supply support for S6BP401AL0SN1B000 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 S6BP401AL0SN1B000 belongs to Infineon's automotive PMIC portfolio, designed specifically to consolidate power delivery and system supervision for next-generation ADAS domain controllers and vision processing units.

FAQ

What is the maximum junction temperature rating for S6BP401AL0SN1B000?

The device is rated for operation up to 150 °C junction temperature, with thermal shutdown activating at 165 °C ± 10 °C. The 6 mm × 6 mm QFN-40 package features an exposed thermal pad that must be soldered to a minimum 200 mm² copper pour for effective heat dissipation in AEC-Q100 Grade-1 environments.

Can the watchdog timer operate independently of the main power rails?

Yes - the watchdog timer remains functional as long as VCC (pin 34) is powered between 2.97 V and 5.5 V, even if individual buck or LDO outputs are disabled. Its WDI and RST pins are electrically isolated from regulator control logic, enabling fail-safe monitoring during partial power-down states.

How does the soft-start behavior change when using external clock synchronization?

Soft-start timing remains fixed at 200 ms regardless of clock source (internal or SYNC pin). The 200 ms duration is internally generated and load-independent, ensuring predictable ramp rates for all four bucks and both LDOs even when switching frequency is adjusted between 1.8 MHz and 2.4 MHz.

Are the preset output voltages factory-trimmed or resistor-programmable?

All preset output voltages are factory-trimmed and stored in non-volatile memory; no external resistors are required for standard configurations. However, FB pins remain accessible to override internal settings using external resistor dividers - enabling fine-tuning within ±5% of nominal values per channel.