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Microchip Technology MIC2178-5.0YWM
- Part No.:
- MIC2178-5.0YWM
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2178-5.0YWM.pdf
- Description:
- IC REG BUCK 5V 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,798
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Product details
Overview
MIC2178-5.0YWM from Microchip Technology is a synchronous step-down DC-DC controller IC supporting 4.5V to 28V input, delivering fixed 5.0V output at up to 15A with external MOSFETs, and featuring adjustable switching frequency from 100kHz to 1MHz for power supply designs in industrial motor drives.
For engineers reviewing the MIC2178-5.0YWM datasheet, MIC2178-5.0YWM pinout, MIC2178-5.0YWM application, or MIC2178-5.0YWM equivalent, key selection criteria include its voltage-mode PWM control architecture, programmable soft-start time, overcurrent protection via external sense resistor, and thermal shutdown behavior under sustained overload conditions.
Technical Context
The MIC2178-5.0YWM implements voltage-mode PWM control with an internal error amplifier, reference voltage of 0.8V, and dedicated COMP pin for loop compensation. It supports external synchronization to avoid beat frequencies in multi-rail systems.
It integrates a precision enable threshold (1.25V typical), power-good indicator with 10ms delay, and uses an external bootstrap capacitor for high-side gate drive. No internal MOSFETs are included - all power switches must be externally selected and placed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±1.5%, stable across load, line, and temperature variations |
| Input Voltage Range | 4.5V to 28V - supports 12V and 24V industrial bus rails |
| Max Output Current | 15A - determined by external MOSFET selection and layout thermal performance |
| Switching Frequency | 100kHz to 1MHz - adjustable via RT resistor; higher frequencies reduce inductor size |
| Reference Voltage | 0.8V ±1% - used for feedback divider calculation in custom-output variants |
| Power-Good Delay | 10ms - ensures stable regulation before asserting PG signal to system logic |
Pinout & Package
Package: 16-pin 4mm × 4mm WQFN with exposed thermal pad (YWM suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input power rail | Connects to 4.5–28V source; requires local ceramic bypass capacitance |
| BOOT | Bootstrap supply for high-side driver | Must be connected to SW node through 0.1µF ceramic capacitor |
| SW | Switch node | Drives external high-side MOSFET gate and connects to inductor |
| PHASE | Low-side gate driver output | Directly drives gate of external low-side MOSFET |
| FB | Feedback input | Monitors output via resistive divider; referenced to 0.8V internal reference |
| EN | Enable control input | Active-high; 1.25V threshold enables operation; hysteresis prevents chatter |
| PGOOD | Power-good open-drain output | Asserts after 10ms regulation stability; pulls low when output deviates >10% |
| COMP | Error amplifier output | Connects to compensation network (R-C-RC) for loop stability tuning |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables predictable loop compensation using standard Type II/III networks |
| Programmable soft-start | Adjustable via external capacitor on SS pin; prevents inrush current during startup |
| External current sensing | Supports precision overcurrent protection using low-value sense resistor in low-side path |
| Thermal shutdown | Activates at 150°C junction temperature; latches off until VIN cycle or EN toggle |
| Synchronization input | Accepts external clock (100kHz–1MHz) on SYNC pin to eliminate switching noise interference |
Applications
| Industrial PLC Power Rails | Motor Drive Auxiliary Supplies |
|---|---|
Use Scenario: Providing regulated 5V for microcontroller, I/O buffers, and communication interfaces inside programmable logic controllers. IC Role / Device Role / Timing Role: Primary DC-DC controller managing isolated auxiliary power conversion from 24V backplane. Use Value: Fixed 5.0V output eliminates need for post-regulation LDOs; 15A capability supports future I/O expansion. | Use Scenario: Generating gate-drive and logic supply for three-phase inverter stages in servo drives. IC Role / Device Role / Timing Role: Synchronous buck controller coordinating high-efficiency 5V rail generation alongside isolated 15V gate supplies. Use Value: Adjustable frequency allows optimization for EMI compliance in noisy motor environments. |
| Factory Automation Sensors | Embedded HMI Controllers |
Use Scenario: Powering analog front-ends and digital signal processors in distributed field sensors. IC Role / Device Role / Timing Role: Centralized 5V regulator feeding multiple sensor sub-circuits with tight load transient response. Use Value: Voltage-mode control delivers consistent regulation despite wide input voltage swings from battery or rectified AC sources. | Use Scenario: Supplying main logic voltage for ARM-based human-machine interface panels in harsh environments. IC Role / Device Role / Timing Role: High-current 5V controller enabling fast wake-up from deep sleep modes without brownout. Use Value: Programmable soft-start prevents reset glitches during cold start after extended storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar DC-DC controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116MH/NOPB | Current-mode control; wider input range (3V–75V); no integrated PGOOD delay | Preferred for wide-input solar or automotive systems; less suitable for precise 5V-only regulation | Select LM5116MH/NOPB only if input exceeds 28V or current-mode loop stability is required |
| TPS40210DGQR | Voltage-mode like MIC2178-5.0YWM but fixed 300kHz freq; no sync input; lower max current (10A) | Better for cost-sensitive, fixed-frequency designs where EMI filtering is pre-characterized | Choose TPS40210DGQR when board space is constrained and 10A output suffices |
Compared with LM5116MH/NOPB and TPS40210DGQR, the MIC2178-5.0YWM offers tighter 5.0V regulation tolerance, programmable soft-start, and synchronized operation - making it optimal for industrial systems requiring deterministic timing and stable auxiliary rails.
Availability
MIC2178-5.0YWM is available at Aetrix Electronics and suitable for industrial PLC power rails, motor drive auxiliary supplies, and embedded HMI controllers requiring stable component supply across multi-year production cycles.
Supply support for MIC2178-5.0YWM 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 for industrial, automotive, and communications markets.
The MIC2178-5.0YWM belongs to Microchip's high-current synchronous buck controller product line, designed specifically for industrial power conversion where reliability, thermal robustness, and precise voltage regulation are critical.
FAQ
What is the recommended minimum input voltage for stable operation of the MIC2178-5.0YWM?
The MIC2178-5.0YWM requires a minimum input voltage of 4.5V to maintain regulation and proper gate drive for external MOSFETs. Below this threshold, the internal bias circuitry may not sustain operation, and the PGOOD signal will deassert. Operation at 4.5V is validated across temperature and load; derating is advised for margin-critical designs.
Does the MIC2178-5.0YWM integrate power MOSFETs?
No, the MIC2178-5.0YWM is a controller-only IC and does not integrate any power MOSFETs. It drives external high-side and low-side N-channel MOSFETs via BOOT and PHASE pins. This architecture allows designers to optimize efficiency, thermal performance, and cost by selecting discrete FETs matched to specific current, voltage, and switching requirements.
How is overcurrent protection implemented in the MIC2178-5.0YWM?
The MIC2178-5.0YWM implements cycle-by-cycle overcurrent protection using an external current-sense resistor placed in the low-side MOSFET source path. The CS pin monitors voltage across this resistor, and protection triggers when the sensed voltage exceeds 100mV. This method provides accurate, scalable current limiting independent of MOSFET RDS(on) variation.
Can the MIC2178-5.0YWM be synchronized to an external clock?
Yes, the MIC2178-5.0YWM accepts an external clock signal on the SYNC pin, supporting frequencies from 100kHz to 1MHz. This feature enables noise-sensitive systems to align switching edges and avoid beat frequencies - especially valuable in motor drives and factory automation equipment sharing common power distribution networks.
What is the function of the COMP pin on the MIC2178-5.0YWM?
The COMP pin on the MIC2178-5.0YWM is the output of the internal error amplifier and serves as the connection point for the loop compensation network. Designers place a Type II or Type III compensation network (typically R-C-RC) between COMP and FB to stabilize the voltage-mode control loop and ensure adequate phase margin across operating conditions.
MIC2178-5.0YWM 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):
- 5V
- 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
MIC2178-5.0YWM FAQ
1.How can I place an order for MIC2178-5.0YWM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2178-5.0YWM 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 MIC2178-5.0YWM reliable?
The price and inventory of MIC2178-5.0YWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2178-5.0YWM is usually 5 days.
3.What payment methods are accepted for MIC2178-5.0YWM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2178-5.0YWM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2178-5.0YWM?
MIC2178-5.0YWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2178-5.0YWM 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 MIC2178-5.0YWM?
For technical support, including MIC2178-5.0YWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2178-5.0YWM requirements.
6.How does Aetrix verify that MIC2178-5.0YWM is sourced from the original manufacturer or authorized distributors?
All MIC2178-5.0YWM 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 MIC2178-5.0YWM meets industry standards.
7.What is the process for return or replacement of MIC2178-5.0YWM?
All MIC2178-5.0YWM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2178-5.0YWM, 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 MIC2178-5.0YWM part is unused and in its original packaging.
Return procedure for MIC2178-5.0YWM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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