MIC2172YM TR Microchip Integrated Circuit (Small Outline Packages) In Stock
Microchip (Micrel) MIC2172YM TR is a PWM current-mode DC-DC controller capable of driving up to 1.25 A with an input voltage range of 2.7 V to 40 V. It integrates peak current sensing and adjustable frequency for flexible switching power supply design. Packaged in an 8-pin SOIC, it suits step-down converters in industrial, automotive, and battery-powered equipment.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- MIC2172YM TR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 2.7 V to 40 V wide input voltage range for diverse power supply architectures
- 1.25 A peak switch current drive for compact buck converter designs
- PWM current-mode control for fast transient response and cycle-by-cycle current limiting
- Adjustable switching frequency to optimize efficiency and filter size
- 8-pin SOIC package for standard SMT assembly
- Suitable for step-down and flyback topologies in industrial and automotive environments
Applications
The MIC2172YM TR is used in step-down (buck) DC-DC converters for industrial equipment, automotive accessories, and battery-powered portable devices that require regulated outputs from high-voltage inputs up to 40 V. Its current-mode PWM control simplifies compensation design and provides inherent overcurrent protection, making it a versatile choice for point-of-load power supplies and battery charger circuits.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range of the MIC2172YM TR, and does it support automotive 12 V or 24 V bus inputs?
The MIC2172YM TR accepts an input voltage from 2.7 V to 40 V, directly supporting 12 V and 24 V automotive bus voltages. This wide range also covers lead-acid battery systems and industrial 24 V rails, making it a practical controller for automotive accessories and factory automation power supplies.
How does the current-mode PWM architecture of MIC2172YM TR improve converter stability and protection?
Current-mode PWM control in the MIC2172YM TR senses the inductor peak current on every switching cycle, providing inherent cycle-by-cycle current limiting up to 1.25 A. This improves line and load transient response compared to voltage-mode control and simplifies the feedback compensation network in buck or flyback converter designs.
Which package does the MIC2172YM TR use, and how does it affect PCB thermal management in a 1 A output design?
The MIC2172YM TR is housed in an 8-pin SOIC package. Because the MIC2172 operates as a controller driving an external switch, the controller IC itself dissipates minimal power. Thermal management effort concentrates on the external MOSFET and inductor selected for the 1.25 A switching stage.
Can the MIC2172YM TR be used in a battery charger circuit operating from a wide-range AC adapter output?
Yes. With its 2.7 V to 40 V input range, the MIC2172YM TR can accept the unregulated DC output from an AC adapter (typically 12 V to 24 V) and regulate a charging voltage for single-cell or multi-cell battery packs. The adjustable switching frequency and current-mode control allow designers to tune the charger response for Li-ion or NiMH chemistries.
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