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Microchip Technology MIC2177-3.3YWM
- Part No.:
- MIC2177-3.3YWM
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2177-3.3YWM.pdf
- Description:
- IC REG BUCK 3.3V 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,000
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Product details
Overview
MIC2177-3.3YWM from Microchip Technology is a synchronous step-down DC-DC controller IC supporting 4.5V to 28V input, delivering fixed 3.3V output at up to 12A with external MOSFETs, and featuring programmable soft-start, overcurrent protection, and thermal shutdown - used in industrial power supplies and FPGA core voltage regulation.
For engineers reviewing the MIC2177-3.3YWM datasheet, MIC2177-3.3YWM pinout, MIC2177-3.3YWM application, or MIC2177-3.3YWM equivalent, key selection criteria include input voltage range, output current capability with external FETs, fixed vs. adjustable output, enable polarity, and thermal performance under continuous load.
Technical Context
The MIC2177-3.3YWM implements a constant-on-time (COT) control architecture for fast transient response and stable operation without external compensation. It integrates a precision reference, error amplifier, and gate drivers optimized for high-side and low-side N-channel MOSFETs.
It supports power-good indication, adjustable frequency via resistor (200 kHz to 1 MHz), and operates across –40°C to +125°C junction temperature. The device requires no external bootstrap diode due to integrated high-side driver charge pump.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1.5% - eliminates external feedback resistors and simplifies layout for stable core rail generation. |
| Input Voltage Range | 4.5V to 28V - supports wide-input industrial and telecom power buses without pre-regulation. |
| Max Output Current | 12A - achievable with properly selected external high- and low-side MOSFETs and inductor. |
| Switching Frequency | 200 kHz to 1 MHz (resistor-programmable) - enables trade-off between efficiency, size, and EMI filtering requirements. |
| Control Method | Constant-On-Time (COT) - delivers <10 µs load transient response without loop compensation components. |
| Operating Temp | –40°C to +125°C TJ - qualified for extended industrial and embedded control environments. |
Pinout & Package
Package: 16-pin 4 mm × 4 mm WQFN with exposed thermal pad (YWM suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Connects to 4.5V–28V input rail; decoupling required within 5 mm of pin. |
| BOOT | High-side gate driver supply | Connects to bootstrap capacitor between BOOT and SW; enables N-channel high-side FET drive. |
| SW | Switch node | Drives external high-side MOSFET source and inductor; critical for EMI and thermal layout. |
| PHASE | Low-side gate driver output | Directly drives gate of external low-side N-channel MOSFET. |
| EN | Enable input | Active-high logic input; internal 1.22V threshold with hysteresis for noise immunity. |
| PGOOD | Power-good open-drain output | Asserts after output reaches 90% of 3.3V and remains in regulation; pulls low on fault. |
| RT | Frequency setting | Resistor-to-GND sets switching frequency; 100 kΩ yields ~500 kHz. |
| SS | Soft-start timing | Capacitor-to-GND controls output ramp time; 1 nF yields ~5 ms ramp. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side gate driver charge pump | Eliminates need for external bootstrap diode and reduces BOM count and board area. |
| Programmable soft-start via SS pin | Prevents inrush current and ensures controlled power-up sequencing for downstream logic. |
| Overcurrent protection with hiccup mode | Detects MOSFET RDS(on)-based current limit and enters safe restart cycle during sustained overload. |
| Thermal shutdown with hysteresis | Shuts down at 165°C and resumes only after cooling to 145°C, preventing thermal runaway. |
| Power-good indicator with delay | Provides system reset or sequencing signal only after stable 3.3V output is confirmed for ≥100 µs. |
Applications
| Industrial PLC Power Supply | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Centralized 24V bus powering multiple I/O modules and CPU subsystems in programmable logic controllers. IC Role / Device Role / Timing Role: Primary buck controller generating clean, regulated 3.3V for microcontroller, communication interfaces, and memory subsystems. Use Value: COT control ensures rapid response to dynamic load steps from real-time I/O polling and fieldbus activity. | Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core rails requiring tight voltage tolerance and fast transient recovery. IC Role / Device Role / Timing Role: High-current, fixed-output DC-DC controller driving external FETs to meet FPGA core VCCINT spec. Use Value: Fixed 3.3V output and 12A capability eliminate trimming components and support full FPGA configuration without derating. |
| Telecom Line Card Power | Embedded Vision System Power |
Use Scenario: Distributed power on carrier-grade line cards where 24V or 48V intermediate bus must be converted to 3.3V for DSPs and PHYs. IC Role / Device Role / Timing Role: Efficient, thermally robust controller enabling high-density power conversion in confined airflow environments. Use Value: Wide input range and –40°C to +125°C rating ensure reliable operation across telecom cabinet temperature gradients. | Use Scenario: Powering image sensor interface, ISP, and AI accelerator SoCs in edge vision cameras with limited thermal margin. IC Role / Device Role / Timing Role: Primary 3.3V supply controller managing peak currents during burst-mode image capture and processing. Use Value: Fast transient response prevents brownout during frame capture bursts, maintaining sensor data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Adjustable output (0.8V–20V), requires external feedback resistors; uses current-mode control. | Better suited for multi-rail systems needing variable outputs; less optimal for fixed 3.3V-only designs. | Select LM5116PWPR when flexibility in output voltage or current-mode stability analysis is required. |
| MP2482DS-LF-Z | Integrated high- and low-side MOSFETs; max 2A output; fixed 3.3V; smaller 8-pin SOIC package. | Limited to low-power applications; not scalable beyond 2A without parallel stages. | Choose MP2482DS-LF-Z for space-constrained, low-current designs where integration outweighs current scalability. |
Compared with LM5116PWPR and MP2482DS-LF-Z, the MIC2177-3.3YWM uniquely combines fixed 3.3V output, 12A capability with external FETs, and COT control - making it optimal for high-current, single-rail industrial and FPGA applications where simplicity, speed, and thermal headroom are prioritized.
Availability
MIC2177-3.3YWM is available at Aetrix Electronics and suitable for industrial PLCs, FPGA power systems, and telecom line cards requiring stable component supply, long-term availability, and traceable sourcing.
Supply support for MIC2177-3.3YWM 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, FPGA, and power management ICs for industrial, automotive, and communications markets.
The MIC2177 family is designed as high-efficiency, high-current synchronous buck controllers targeting FPGA, ASIC, and DSP core power applications where fast transient response and thermal resilience are critical.
FAQ
What is the recommended minimum input voltage for stable operation of the MIC2177-3.3YWM?
The MIC2177-3.3YWM requires a minimum input voltage of 4.5V to maintain regulation and proper gate drive functionality. Below this threshold, the internal charge pump cannot sustain high-side FET conduction, leading to output dropout or unregulated behavior. Always verify input rail stability under worst-case load and temperature conditions when using MIC2177-3.3YWM in design.
Does the MIC2177-3.3YWM require an external bootstrap diode?
No, the MIC2177-3.3YWM integrates a charge pump circuit that self-generates the gate drive voltage for the high-side N-channel MOSFET, eliminating the need for an external bootstrap diode. This reduces component count and improves reliability in high-vibration or high-temperature environments where discrete diodes may fail. The MIC2177-3.3YWM's BOOT pin connects directly to the bootstrap capacitor without diode insertion.
How is overcurrent protection implemented in the MIC2177-3.3YWM?
The MIC2177-3.3YWM implements valley-current limiting by sensing the voltage drop across the low-side MOSFET's RDS(on) during the off-time. When current exceeds the programmed threshold, the device enters hiccup mode - disabling switching for ~20 ms before attempting restart. This protects external FETs and inductors during short-circuit or overload events without requiring additional sense resistors. The MIC2177-3.3YWM does not use external current-sense amplifiers.
Can the MIC2177-3.3YWM be used with ceramic output capacitors only?
Yes, the MIC2177-3.3YWM's constant-on-time (COT) control architecture is inherently stable with low-ESR ceramic output capacitors and does not require the ESR-based zero provided by tantalum or aluminum electrolytics. A typical design uses three 22 µF/6.3V X5R ceramics in parallel. This simplifies filtering, improves reliability, and reduces footprint - all validated in Microchip's MIC2177-3.3YWM reference design.
What is the function of the PHASE pin on the MIC2177-3.3YWM?
The PHASE pin on the MIC2177-3.3YWM is the low-side gate driver output, directly driving the gate of the external low-side N-channel MOSFET. It operates with rail-to-rail swing (0V to VIN) and features slew-rate control to minimize EMI. Unlike the SW pin, PHASE is not a switch node - it must be routed away from sensitive analog traces and kept short to reduce gate ringing. This pin is essential for synchronous rectification in the MIC2177-3.3YWM power stage.
MIC2177-3.3YWM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2.5A
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MIC2177-3.3YWM FAQ
1.How can I place an order for MIC2177-3.3YWM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2177-3.3YWM on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC2177-3.3YWM reliable?
The price and inventory of MIC2177-3.3YWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2177-3.3YWM is usually 5 days.
3.What payment methods are accepted for MIC2177-3.3YWM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2177-3.3YWM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2177-3.3YWM?
MIC2177-3.3YWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2177-3.3YWM order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC2177-3.3YWM?
For technical support, including MIC2177-3.3YWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2177-3.3YWM requirements.
6.How does Aetrix verify that MIC2177-3.3YWM is sourced from the original manufacturer or authorized distributors?
All MIC2177-3.3YWM products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC2177-3.3YWM meets industry standards.
7.What is the process for return or replacement of MIC2177-3.3YWM?
All MIC2177-3.3YWM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2177-3.3YWM, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC2177-3.3YWM part is unused and in its original packaging.
Return procedure for MIC2177-3.3YWM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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