Microchip Technology MIC7400YFL-T5

Overview

MIC7400YFL-T5 from Microchip Technology is a highly integrated, I²C-programmable power management IC (PMIC) featuring five synchronous buck regulators (up to 3A each), one non-synchronous boost regulator (200 mA), HyperLight Load® mode for ultra-low-quiescent-current operation, and internal EEPROM for on-the-fly configuration. It delivers precise voltage regulation across multiple rails in SSDs, infotainment systems, and portable multimedia devices.

For engineers reviewing the MIC7400YFL-T5 datasheet, MIC7400YFL-T5 pinout, MIC7400YFL-T5 application, or MIC7400YFL-T5 equivalent, key selection criteria include its 36-pin FQFN package, dual power modes (standby/normal), ±1% output voltage accuracy over temperature/line/load, 2.0 MHz boost switching frequency, and configurable power-on-reset thresholds and sequencing delays.

Technical Context

The MIC7400YFL-T5 implements adaptive on-time control across all five buck channels for ultra-fast transient response-critical for core supply rails in SSD controllers and SoCs. Its boost regulator uses PWM control with programmable current-limit and short-to-ground fault detection via an integrated disconnect switch.

Configuration is handled through a high-speed I²C interface (up to 3.4 MHz) accessing registers backed by internal EEPROM, enabling persistent settings for output voltages, soft-start ramps, pull-down behavior, and power-up sequencing without external components or firmware reprogramming.

Key Specifications

Pinout & Package

36-pin 4.5 mm × 4.5 mm × 0.85 mm FQFN package with 0.4 mm pitch and exposed thermal pad (EP). Pin functions validated per Microchip DS20005887A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMIC applications.

Compared with MP8859GQ-Z and TPS650944RGER, the MIC7400YFL-T5 uniquely balances five-buck capability, EEPROM-based configurability, and compact 36-pin FQFN packaging-making it optimal for cost-sensitive, space-constrained SSD and portable infotainment designs requiring field-updatable power policies.

Availability

MIC7400YFL-T5 is available at Aetrix Electronics and suitable for client SSDs, in-vehicle infotainment systems, and portable multimedia devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for MIC7400YFL-T5 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

Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on reliability, longevity, and embedded system integration.

The MIC7400 product line was designed specifically for high-density, multi-rail power delivery in portable and embedded storage applications-emphasizing configurability, low quiescent current, and robust fault protection.

FAQ

What is the maximum output current supported by each buck regulator in the MIC7400YFL-T5?

Each of the five synchronous buck regulators in the MIC7400YFL-T5 supports up to 3A continuous output current. Buck channels 1–3 and 5 have a typical current-limit threshold of 4.1A, while Buck 4 is rated higher at 6.1A, as confirmed in Table 1-1 of the official datasheet. These values are programmable via I²C registers and validated across –40°C to +125°C junction temperature.

Does the MIC7400YFL-T5 support independent enable/disable control for each regulator?

Yes, the MIC7400YFL-T5 supports individual ON, OFF, and Stand-by modes for each buck and boost regulator via I²C register writes. This allows selective activation-for example, powering only the core rail during boot while keeping memory and peripheral rails disabled-reducing system-level idle power without requiring external GPIO control.

How does the MIC7400YFL-T5 handle power sequencing during startup?

The MIC7400YFL-T5 implements programmable power-up sequencing with per-rail delay steps (1 ms typical) and soft-start ramp control. Sequencing order and timing are stored in internal EEPROM and executed autonomously upon AVIN ramp-up, eliminating need for external sequencer ICs or FPGA-controlled GPIO timing.

What protection features are integrated into the MIC7400YFL-T5?

The MIC7400YFL-T5 integrates thermal shutdown (160°C trip, 20°C hysteresis), per-channel overcurrent protection (with gross high-side current limit), boost short-to-ground detection with automatic disconnect, undervoltage lockout (2.25V threshold), and power-good monitoring with 4% hysteresis on buck rails and 380 mV on boost. All protections operate independently and are configurable via I²C.

Can the MIC7400YFL-T5 be used in automotive applications?

Yes, the MIC7400YFL-T5 is qualified for operation from –40°C to +125°C junction temperature and features robust protection including thermal shutdown, current limiting, and UVLO-making it suitable for under-hood and cabin infotainment applications. However, it is not AEC-Q100 qualified; designers requiring automotive-grade qualification should verify compliance with their Tier 1 supplier requirements.