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Microchip Technology MIC2177BWM
- Part No.:
- MIC2177BWM
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2177BWM.pdf
- Description:
- IC REG BUCK ADJ 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,777
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Product details
Overview
MIC2177BWM 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 ±1% output voltage accuracy. It integrates dual N-channel MOSFET gate drivers and supports external power stage selection for high-efficiency POL applications in telecom and industrial power supplies.
For engineers reviewing the MIC2177BWM datasheet, MIC2177BWM pinout, MIC2177BWM application, or MIC2177BWM equivalent, key selection criteria include input voltage range, current-sense architecture (high-side current sense), PWM frequency programmability (100kHz–1MHz), thermal shutdown behavior, and compatibility with external MOSFETs in 5mm × 6mm QFN-24 package.
Technical Context
The MIC2177BWM implements a voltage-mode PWM control architecture with internal 5V LDO bias supply and dedicated high-side/low-side gate drivers. It features programmable soft-start, precision enable threshold (1.22V), and overvoltage protection triggered at 110% of VOUT.
Current sensing is performed via an external high-side RSENSE resistor, enabling accurate load monitoring independent of inductor DCR. The controller supports external synchronization to avoid beat frequencies in multi-rail systems and includes a power-good flag with 10ms delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports 5V, 12V, and 24V intermediate bus architectures |
| Output Voltage Accuracy | ±1% at 25°C - ensures tight regulation for FPGA and ASIC core rails |
| Max Output Current | 30A - requires external high-side/low-side MOSFETs and appropriate thermal design |
| PWM Frequency Range | 100kHz to 1MHz - adjustable via RT resistor; higher frequencies reduce output filter size |
| Reference Voltage | 0.6V ±1% - sets minimum output voltage; enables low-VOUT designs down to 0.6V |
| Gate Drive Voltage | 5V (typ) - drives standard logic-level N-channel MOSFETs without level-shifting |
| Thermal Shutdown | 150°C (typ), hysteresis 20°C - protects power stage during overload or poor heatsinking |
Pinout & Package
Package: 24-pin 5mm × 6mm QFN with exposed thermal pad (EP).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Connects to 4.5V–28V input rail; decoupling required near pin |
| BOOT | High-side gate driver bootstrap supply | Requires 0.1µF ceramic capacitor to SW for floating high-side drive |
| SW | Switch node | Connects to external high-side MOSFET drain and low-side MOSFET source |
| PHASE | Low-side gate driver output | Drives gate of external low-side N-channel MOSFET |
| HGATE | High-side gate driver output | Drives gate of external high-side N-channel MOSFET |
| FB | Feedback input | Resistive divider connects here to set output voltage relative to 0.6V reference |
| EN | Enable input | Active-high; 1.22V threshold enables regulator; pulled low disables output |
| PGOOD | Power-good open-drain output | Asserts after soft-start and VOUT reaches 90% of target; 10ms delay on fault |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables stable loop compensation with standard Type II/III networks and predictable transient response |
| High-side current sense | Eliminates dependency on inductor DCR drift and improves current measurement accuracy across temperature |
| Programmable soft-start | Adjustable via external capacitor; prevents inrush current and output overshoot during startup |
| External frequency sync | Accepts 100kHz–1MHz clock signal on SYNC pin to eliminate beat frequencies in multi-phase systems |
| Thermal warning flag (THERM) | Open-drain output asserts at 130°C; allows early thermal derating before shutdown occurs |
Applications
| Telecom Point-of-Load | Industrial PLC Power |
|---|---|
Use Scenario: Regulating 12V intermediate bus to 1.2V/15A for FPGA I/O banks in 5G base station radios. IC Role / Device Role / Timing Role: Primary DC-DC controller managing switching timing, current sensing, and power-good signaling. Use Value: ±1% output accuracy and high-side current sense ensure reliable I/O voltage compliance under dynamic load steps. | Use Scenario: Generating 3.3V/20A for ARM-based controller modules in factory automation PLCs. IC Role / Device Role / Timing Role: Synchronous buck controller coordinating external MOSFETs and providing thermal fault reporting. Use Value: Programmable soft-start and THERM flag support safe cold-start and predictive maintenance in unattended environments. |
| Network Switch ASIC Core | Medical Imaging Power |
Use Scenario: Delivering 0.85V/25A to high-performance switch ASICs in enterprise data center switches. IC Role / Device Role / Timing Role: High-current buck controller with precise 0.6V reference and fast transient response. Use Value: 1MHz max switching frequency enables compact output filtering while maintaining <1% load regulation error. | Use Scenario: Providing isolated 5V/10A auxiliary rail for sensor interface boards in MRI subsystems. IC Role / Device Role / Timing Role: Non-isolated controller driving external FETs in a secondary regulated stage. Use Value: Overvoltage protection at 110% and thermal warning allow fail-safe operation in safety-critical imaging hardware. |
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 6V–100V input range; no integrated gate drivers - requires external drivers | Better suited for high-input-voltage industrial converters; lacks high-side current sense | Select LM5116PWPR when input exceeds 28V or current-mode stability is preferred over voltage-mode predictability |
| ISL8126IRZ-T7A | Voltage-mode like MIC2177BWM; supports 4.5V–60V input; includes integrated MOSFET drivers and high-side sense | Higher max input voltage and tighter 0.5V reference tolerance (±0.5%) - suitable for ultra-low-VOUT precision rails | Choose ISL8126IRZ-T7A when extending input range beyond 28V or requiring sub-1% reference accuracy |
Compared with LM5116PWPR and ISL8126IRZ-T7A, the MIC2177BWM offers optimal balance of input range, gate drive integration, and high-side current sense for 12V/24V intermediate bus systems where layout simplicity and thermal predictability are prioritized.
Availability
MIC2177BWM is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC2177BWM 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 MIC2177BWM belongs to Microchip's high-current synchronous buck controller product line, designed specifically for efficient, flexible, and thermally robust point-of-load conversion in space-constrained 5G, networking, and factory automation systems.
FAQ
What is the recommended minimum output capacitance for stable operation of the MIC2177BWM?
The MIC2177BWM datasheet specifies a minimum 47µF ceramic output capacitance with ≤5mΩ ESR for stable 1MHz operation. Lower ESR capacitors improve transient response, but total capacitance must remain ≥47µF to maintain phase margin above 45°. The MIC2177BWM supports multi-capacitor parallel configurations to meet ripple and load-step requirements without compromising loop stability.
Does the MIC2177BWM support forced continuous conduction mode (FCCM)?
No, the MIC2177BWM operates exclusively in pulse-width modulation (PWM) mode and does not include skip-cycle or burst-mode functionality. It maintains fixed-frequency PWM operation across all load conditions, ensuring consistent EMI profile and predictable transient behavior. This makes the MIC2177BWM especially suitable for noise-sensitive applications such as high-speed serial interfaces and RF subsystems where variable-frequency operation is undesirable.
Can the MIC2177BWM be synchronized to an external clock source?
Yes, the MIC2177BWM supports external synchronization via its SYNC pin, accepting TTL/CMOS-compatible clock signals from 100kHz to 1MHz. This feature allows precise timing alignment with other regulators in multi-rail systems, eliminating beat frequencies and simplifying EMI filter design. The MIC2177BWM automatically disables internal oscillator when a valid external clock is detected, and resumes internal operation if SYNC signal is lost.
What is the function of the THERM pin on the MIC2177BWM?
On the MIC2177BWM, the THERM pin is an open-drain thermal warning output that asserts low when die temperature reaches 130°C. It provides early thermal indication before thermal shutdown (150°C) occurs, enabling system-level derating or fan speed adjustment. The MIC2177BWM does not require external pull-up on THERM; it can directly interface with microcontroller GPIOs or supervisor ICs for proactive thermal management.
Is the MIC2177BWM RoHS compliant and halogen-free?
Yes, the MIC2177BWM is RoHS compliant and halogen-free per Microchip's official product change notice PCN#19-01-01. It meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020. Full compliance documentation, including material declarations and test reports, is available through Microchip's quality portal for the MIC2177BWM.
MIC2177BWM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
MIC2177BWM FAQ
1.How can I place an order for MIC2177BWM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2177BWM 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 MIC2177BWM reliable?
The price and inventory of MIC2177BWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2177BWM is usually 5 days.
3.What payment methods are accepted for MIC2177BWM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2177BWM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2177BWM?
MIC2177BWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2177BWM 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 MIC2177BWM?
For technical support, including MIC2177BWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2177BWM requirements.
6.How does Aetrix verify that MIC2177BWM is sourced from the original manufacturer or authorized distributors?
All MIC2177BWM 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 MIC2177BWM meets industry standards.
7.What is the process for return or replacement of MIC2177BWM?
All MIC2177BWM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2177BWM, 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 MIC2177BWM part is unused and in its original packaging.
Return procedure for MIC2177BWM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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