28V/9A Dc-Dc Buck Regulator W/ Hsc 28 Vqfn 5X6X0.9Mm T/R Rohs Compliant: Yes |Microchip MIC26901YJL-TR

MIC26901YJL-TR – 28V/9A DC-DC Buck Regulator with Hyper Speed Control® – Microchip Technology

Optimize your power systems with the MIC26901YJL-TR step-down regulator from Microchip Technology. This high-efficiency buck converter delivers up to 9A output current with industry-leading transient response, making it ideal for demanding applications requiring compact power solutions. PCX ensures genuine Microchip components with rapid shipping and dedicated technical support.

Key Features

• Wide Input Range: 4.5V to 28V operation
• High-Current Output: 9A continuous load capability
• Adjustable Output: 0.8V to 5.5V via external resistors
• Hyper Speed Control® Technology: Ultra-fast transient response
• 600kHz Switching Frequency: Enables compact external components
• Full Synchronous Rectification: Maximizes efficiency up to 95%
• Robust Operation: -40°C to +125°C junction temperature range

Technical Specifications

This monolithic buck regulator features a single adjustable output in a space-saving 28-QFN (5x6mm) package. Utilizing Microchip’s SuperSwitcher II™ architecture, it integrates high-side and low-side MOSFETs while minimizing electromagnetic interference (EMI). The device includes cycle-by-cycle current limiting, thermal shutdown, and soft-start functionality for reliable operation in industrial environments. Surface-mount design simplifies PCB integration with standard reflow processes.

Typical Applications

• Industrial automation controllers
• Telecommunications infrastructure
• Network routers and switches
• Embedded computing systems
• Medical diagnostic equipment

About Microchip Technology

Microchip Technology is a global leader in microcontroller, mixed-signal, analog, and Flash-IP solutions. With over 30 years of innovation, the company consistently delivers high-reliability components for mission-critical systems across automotive, industrial, and aerospace sectors.

Renowned for rigorous quality standards, Microchip holds ISO/TS 16949 and ISO 9001 certifications. Their vertically integrated manufacturing ensures component traceability and supply chain integrity, making MIC-series regulators a trusted choice for design engineers worldwide.

About DC-DC Switching Regulators

DC-DC buck regulators efficiently step down higher input voltages to stable lower outputs with minimal power loss. Unlike linear regulators, switching topologies like the MIC26901 achieve >90% efficiency by rapidly switching transistors and storing energy in inductors, significantly reducing heat dissipation.

These regulators are fundamental in modern electronics where voltage conversion, power density, and thermal management are critical. Advanced features like synchronous rectification and frequency control optimize performance in space-constrained applications from IoT devices to server farms.

Packaging Options

Available in Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® formats to support prototyping and volume production requirements.

Frequently Asked Questions

Q: What protection features does this regulator include?
A: It incorporates overcurrent protection, thermal shutdown, and under-voltage lockout (UVLO) for system safety.

Q: Is external compensation required?
A: No – the MIC26901 uses advanced constant-on-time control that eliminates external compensation networks.

Q: Can it operate from automotive batteries?
A: Yes, the 4.5-28V input range covers 12V/24V automotive systems with surge tolerance per ISO-7637.

Q: What efficiency can I expect at full load?
A: Typical efficiency exceeds 92% at 9A output when converting 12V to 5V (refer to datasheet graphs).

Q: Does PCX provide design support?
A: Yes – our engineering team offers schematic review and layout guidance for all Microchip power products.

Q: How does Hyper Speed Control® improve performance?
A: It reduces output capacitance requirements by 70% while maintaining ±3% regulation during 9A load transients.

Note: Product image is representational. For detailed specifications, download the datasheet from PCXCo.com.

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