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Microchip Technology MIC2178YWMTR
- Part No.:
- MIC2178YWMTR
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2178YWMTR.pdf
- Description:
- IC REG BUCK ADJ 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,606
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Product details
Overview
MIC2178YWMTR from Microchip Technology is a synchronous step-down DC-DC controller IC supporting 4.5V to 28V input, delivering up to 30A output current with adjustable 0.6V reference voltage and integrated MOSFET gate drivers for external high-side and low-side N-channel FETs. It targets point-of-load power supplies in telecom infrastructure and industrial computing systems.
For engineers reviewing the MIC2178YWMTR datasheet, MIC2178YWMTR pinout, MIC2178YWMTR application, or MIC2178YWMTR equivalent, key selection criteria include input voltage range, peak current capability, gate drive strength, thermal shutdown threshold, and PWM frequency programmability via external resistor.
Technical Context
The MIC2178YWMTR implements a voltage-mode PWM control architecture with internal 1.2MHz oscillator and external frequency synchronization capability. It features programmable soft-start, overcurrent protection using valley-current sensing, and thermal shutdown at 150°C.
Control loop compensation is performed externally via Type II or Type III network on the COMP pin. The device supports power-good indication (PGOOD) with adjustable delay and enables precise output voltage regulation down to 0.6V ±1% over line, load, and temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide-range industrial and telecom input rails without pre-regulation |
| Output Voltage Range | 0.6V to 5.5V - set by external resistor divider; 0.6V reference enables low-voltage CPU/GPU core supplies |
| Max Output Current | 30A - determined by external MOSFET selection and PCB thermal design, not internal current limit |
| Switching Frequency | 100kHz to 1MHz - adjustable via RT resistor; higher frequencies reduce inductor size but increase switching loss |
| Gate Drive Voltage | 12V typical - drives external N-channel MOSFETs with sufficient VGS margin for RDS(on) optimization |
| Thermal Shutdown | 150°C - protects controller and external FETs during sustained overload or poor heatsinking |
Pinout & Package
Microchip MIC2178YWMTR is housed in a 20-pin 4mm × 4mm thermally enhanced QFN package with exposed thermal pad (suffix YWM).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Connects to 4.5–28V supply rail; decoupling required near pin |
| BOOT | High-side gate driver bootstrap supply | Provides floating bias for high-side N-FET driver; requires 0.1µF ceramic capacitor to SW |
| SW | Switch node | Connects to source of high-side FET and drain of low-side FET; critical for EMI and layout |
| PHASE | Phase node output | Drives gates of external high-side and low-side N-FETs; dual-source/sink capability |
| COMP | Error amplifier output | External compensation network connects here to stabilize voltage-mode control loop |
| FB | Feedback input | Monitors output voltage via resistor divider; sets regulated output with 0.6V reference |
| EN | Enable input | Active-high logic input; pulls low to disable regulator and reduce quiescent current |
| PGOOD | Power-good open-drain output | Asserts after output reaches 90% of target and remains stable for 10ms |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables predictable loop compensation and stable operation across wide input/output ranges |
| Valley-current overcurrent protection | Detects short-circuit or overload at low-side FET conduction phase for fast response and accurate current limiting |
| Programmable soft-start | Prevents inrush current via external capacitor on SS pin; avoids input rail sag during startup |
| Thermal shutdown with hysteresis | Shuts down at 150°C and restarts at ~135°C to prevent thermal cycling damage |
| External frequency synchronization | Accepts external clock signal on SYNC pin to eliminate beat frequencies in multi-rail systems |
Applications
| Telecom Point-of-Load Supply | Industrial FPGA Core Power |
|---|---|
Use Scenario: 12V intermediate bus powering 0.85V/20A FPGA core rail in base station equipment. IC Role / Device Role / Timing Role: Primary DC-DC controller managing high-efficiency buck conversion with tight transient response. Use Value: Adjustable switching frequency allows optimization for efficiency vs. size; 0.6V reference ensures accurate low-voltage regulation. | Use Scenario: 24V factory automation system supplying 1.2V/15A to industrial-grade FPGA I/O banks. IC Role / Device Role / Timing Role: Synchronous buck controller driving discrete N-FETs for robust thermal performance under continuous load. Use Value: Valley-current OCP provides reliable short-circuit protection without false triggering during FPGA configuration surges. |
| Network Switch ASIC Supply | Medical Imaging Data Acquisition Board |
Use Scenario: 48V-to-12V intermediate conversion feeding downstream POL modules in 10G Ethernet switch line cards. IC Role / Device Role / Timing Role: High-input-voltage buck controller enabling compact, efficient intermediate bus architecture. Use Value: 28V max VIN rating supports derated 48V systems; thermal shutdown prevents field failures in sealed enclosures. | Use Scenario: 5V-to-1.8V conversion for high-speed ADC/DAC interfaces in portable ultrasound imaging hardware. IC Role / Device Role / Timing Role: Precision buck controller delivering low-noise, tightly regulated voltage for analog signal chain integrity. Use Value: 1% reference accuracy and external compensation ensure stable regulation despite varying sensor loading conditions. |
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 | Current-mode control; wider 6–100V input range; no integrated gate drivers - requires external drivers | Better suited for high-voltage industrial inputs; less optimal for low-VOUT, high-current POL where gate drive integration matters | Select LM5116PWPR when input exceeds 28V or when discrete driver optimization is preferred |
| MP2918GL-Z | Voltage-mode like MIC2178YWMTR; 4.5–28V input; integrated 1.5A gate drivers; fixed 600kHz frequency | Lacks frequency programming and external sync; lower gate drive current limits max FET size and switching speed | Choose MP2918GL-Z for cost-sensitive designs where 600kHz fixed frequency suffices and layout simplicity is prioritized |
Compared with LM5116PWPR and MP2918GL-Z, the MIC2178YWMTR offers programmable frequency and stronger gate drive within its 4.5–28V range - making it optimal for high-current, thermally constrained POL designs requiring layout flexibility and precise timing control.
Availability
MIC2178YWMTR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial FPGA power, and medical imaging data acquisition systems requiring stable component supply and long-term production continuity.
Supply support for MIC2178YWMTR 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 MIC2178YWMTR belongs to Microchip's high-current synchronous buck controller product line, designed specifically for scalable, high-efficiency point-of-load power conversion in space-constrained and thermally demanding applications.
FAQ
What is the recommended minimum output capacitance for stable operation of the MIC2178YWMTR?
The MIC2178YWMTR requires ≥220µF total output capacitance with low ESR (≤5mΩ) for stable regulation under full load. Ceramic + polymer hybrid configurations are recommended to balance ripple suppression and transient response. Layout must minimize loop inductance between output caps and PHASE/SW pins. The MIC2178YWMTR datasheet specifies this value based on 30A load step testing with <1% overshoot.
Does the MIC2178YWMTR support parallel operation for higher current capability?
No, the MIC2178YWMTR does not include built-in current-sharing or phase-sync features for parallel operation. It is designed as a single-phase controller. For >30A applications, use multiphase controllers such as Microchip's MIC2179 or implement external current-sharing circuitry. The MIC2178YWMTR pinout and control architecture lack dedicated share-bus or master/slave signaling.
What is the maximum allowable junction temperature for continuous operation of the MIC2178YWMTR?
The MIC2178YWMTR has a maximum junction temperature of 150°C, at which thermal shutdown activates. Continuous operation should be limited to ≤125°C junction temperature per Microchip's reliability guidelines. Thermal performance depends on PCB copper area, thermal vias under the exposed pad, and airflow. The MIC2178YWMTR's YWM package includes an exposed thermal pad requiring solder connection to inner ground plane.
Can the MIC2178YWMTR be used with p-channel high-side MOSFETs?
No, the MIC2178YWMTR is designed exclusively for n-channel high-side and low-side MOSFETs. Its PHASE driver outputs are optimized for n-FET gate drive with 12V bootstrap capability. Using p-channel devices would require incompatible gate drive polarity and voltage levels. The MIC2178YWMTR datasheet explicitly states n-channel FET compatibility in the Applications section.
Is there a recommended external compensation network for the MIC2178YWMTR when regulating 1.0V at 25A?
For 1.0V/25A operation with a 0.47µH inductor and 1000µF output capacitance, Microchip recommends a Type II compensation network: 10kΩ from COMP to FB, 1nF from COMP to GND, and 220pF in series with 10kΩ from COMP to FB. This network achieves 25° phase margin per simulation in the MIC2178YWMTR evaluation report. Component tolerances and PCB parasitics require bench validation for final design.
MIC2178YWMTR 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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 16.5V
- Voltage - Output (Min/Fixed):
- 1.245V
- Voltage - Output (Max):
- 16.5V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MIC2178YWMTR FAQ
1.How can I place an order for MIC2178YWMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2178YWMTR 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 MIC2178YWMTR reliable?
The price and inventory of MIC2178YWMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2178YWMTR is usually 5 days.
3.What payment methods are accepted for MIC2178YWMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2178YWMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2178YWMTR?
MIC2178YWMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2178YWMTR 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 MIC2178YWMTR?
For technical support, including MIC2178YWMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2178YWMTR requirements.
6.How does Aetrix verify that MIC2178YWMTR is sourced from the original manufacturer or authorized distributors?
All MIC2178YWMTR 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 MIC2178YWMTR meets industry standards.
7.What is the process for return or replacement of MIC2178YWMTR?
All MIC2178YWMTR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2178YWMTR, 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 MIC2178YWMTR part is unused and in its original packaging.
Return procedure for MIC2178YWMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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