My Inquiry
My Account
Microchip Technology MIC2178-5.0BWM
- Part No.:
- MIC2178-5.0BWM
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2178-5.0BWM.pdf
- Description:
- IC REG BUCK 5V 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:13,219
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2178-5.0BWM 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 programmable soft-start, overcurrent protection, and thermal shutdown - used in industrial power supplies and embedded system rails.
For engineers reviewing the MIC2178-5.0BWM datasheet, MIC2178-5.0BWM pinout, MIC2178-5.0BWM application, or MIC2178-5.0BWM equivalent, key selection criteria include input voltage range, output voltage accuracy, current-sense interface type, PWM frequency adjustability, and thermal management capability under continuous load.
Technical Context
The MIC2178-5.0BWM implements a constant-on-time (COT) control architecture for fast transient response without loop compensation components. It integrates a high-side gate driver capable of driving N-channel MOSFETs and supports external low-side FET selection for efficiency optimization across load conditions.
It features a precision 0.6V reference for output voltage setting, uses resistor-based current sensing via an external sense resistor, and provides enable control with precise UVLO thresholds (4.2V turn-on, 3.9V turn-off) for reliable system sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide industrial input rails including 12V and 24V systems. |
| Output Voltage | Fixed 5.0V ±1% - eliminates external feedback resistors and simplifies layout for stable USB-compliant rail generation. |
| Max Output Current | 15A - achievable with properly selected external high- and low-side MOSFETs and thermal design. |
| Switching Frequency | Programmable 200kHz to 1MHz - enables trade-off between efficiency, size, and EMI performance via RT resistor. |
| Current Sense | External resistor-based - allows accurate overcurrent threshold setting and loss optimization per FET RDS(on). |
| Control Method | Constant-On-Time (COT) - delivers sub-100ns load transient response without external compensation network. |
Pinout & Package
Available in 16-pin 4mm × 4mm WQFN package with exposed thermal pad for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Connects to 4.5–28V supply; requires local ceramic bypass capacitor. |
| VDD | Internal LDO input | Supplies internal circuitry; decoupled with 1µF ceramic capacitor. |
| BOOT | High-side gate driver bootstrap | Connected to SW node through 0.1µF ceramic capacitor for high-side FET drive. |
| SW | Switch node | Drives external high-side MOSFET source and connects to inductor; critical for EMI layout. |
| PHASE | Low-side gate driver output | Directly drives gate of external low-side N-channel MOSFET. |
| FB | Feedback input | Internally tied to 5.0V reference; no external divider required. |
| EN | Enable input | Active-high logic input with hysteresis; controls startup and shutdown sequencing. |
| SS | Soft-start timing | Connects to capacitor to set ramp time for controlled output voltage rise. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates feedback resistor network, reducing BOM count and layout sensitivity. |
| Constant-On-Time control | Enables immediate response to load steps without compensation components or tuning. |
| Programmable switching frequency | Allows optimization of inductor size, efficiency, and conducted EMI filtering requirements. |
| Thermal shutdown with hysteresis | Protects against sustained overload or inadequate heatsinking; resumes operation after cooldown. |
| Adjustable soft-start | Prevents inrush current and stabilizes upstream supply during power-up sequencing. |
Applications
| Industrial PLC Power Rail | Embedded Computing Board |
|---|---|
Use Scenario: Powering FPGA I/O banks and microcontroller peripherals in programmable logic controllers. IC Role / Device Role / Timing Role: Primary 5V buck controller supplying regulated rail to mixed-signal subsystems. Use Value: Tight 5.0V ±1% regulation ensures reliable interface timing and reduces digital noise coupling into analog sections. | Use Scenario: Generating main 5V system rail on ARM-based edge computing modules with space-constrained layouts. IC Role / Device Role / Timing Role: High-efficiency synchronous buck controller enabling compact, thermally robust power stage. Use Value: COT architecture maintains regulation during CPU burst loads without output capacitor oversizing. |
| Test Equipment Front-End | Motor Drive Control Logic Supply |
Use Scenario: Providing clean 5V bias for ADC reference buffers and signal conditioning circuits in benchtop instruments. IC Role / Device Role / Timing Role: Low-noise, tightly regulated DC-DC controller minimizing measurement offset drift. Use Value: Fixed-output accuracy and low output ripple (<15mVpp) preserve dynamic range in 16-bit data acquisition paths. | Use Scenario: Supplying isolated gate driver logic and MCU core voltage in servo amplifier designs. IC Role / Device Role / Timing Role: Robust 5V controller tolerant of bus transients and motor commutation noise. Use Value: Wide 4.5–28V input range accommodates battery-fed or rectified AC inputs while maintaining regulation during voltage dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116MH/NOPB | Adjustable output (0.8–20V), requires external feedback resistors; higher minimum input voltage (6V). | Better suited for multi-rail systems needing variable outputs; less ideal for dedicated 5V-only designs. | Choose LM5116MH/NOPB when flexibility in output voltage or higher input voltage tolerance is required. |
| MP2494DN-LF-Z | Integrated high- and low-side MOSFETs; max 2A output; fixed 5V; smaller 8-pin SOIC package. | Limited to low-power applications; not scalable beyond ~2A without external FETs. | Choose MP2494DN-LF-Z only for space-constrained, low-current (<2A) 5V rails where integration outweighs current capability. |
Compared with LM5116MH/NOPB and MP2494DN-LF-Z, the MIC2178-5.0BWM uniquely combines fixed 5.0V output, 15A scalability via external FETs, and COT control - making it optimal for industrial 5V rails demanding both precision and high-current headroom without redesigning feedback or gate drive stages.
Availability
MIC2178-5.0BWM is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and test equipment requiring stable component supply and long-term production continuity.
Supply support for MIC2178-5.0BWM 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 family is designed for high-efficiency, externally FET-driven buck converters targeting industrial power supplies and embedded systems requiring precise fixed-output regulation and fast transient response.
FAQ
What is the output voltage tolerance of the MIC2178-5.0BWM?
The MIC2178-5.0BWM provides a fixed 5.0V output with ±1% tolerance over line, load, and temperature ranges. This specification is guaranteed by internal trimming and referenced to a precision 0.6V bandgap, ensuring consistent performance without external feedback components. The MIC2178-5.0BWM achieves this accuracy across its full operating input range (4.5V–28V) and output current range (0–15A), as verified in production testing per Microchip's datasheet MCRLS05892-1.
Does the MIC2178-5.0BWM require external MOSFETs?
Yes, the MIC2178-5.0BWM is a controller IC and requires external high-side and low-side N-channel MOSFETs to form the complete buck power stage. It integrates dedicated gate drivers for both, but does not include power switches. The MIC2178-5.0BWM's design enables optimized efficiency and thermal management by allowing selection of FETs matched to specific current, RDS(on), and switching loss requirements.
Can the MIC2178-5.0BWM be used with a 3.3V input supply?
No, the MIC2178-5.0BWM has a minimum input voltage of 4.5V and cannot operate reliably from a 3.3V supply. Its internal bias circuitry and gate drivers require VIN ≥ 4.5V to ensure proper startup and sustained operation. Attempting to use the MIC2178-5.0BWM below this threshold may result in undervoltage lockout activation or unstable regulation. For 3.3V-input applications, a different controller or converter must be selected.
How is the switching frequency set on the MIC2178-5.0BWM?
The switching frequency of the MIC2178-5.0BWM is set using an external resistor (RT) connected between the RT pin and ground. Frequency scales linearly from 200kHz to 1MHz as RT changes from 200kΩ to 20kΩ. This resistor-based programming allows designers to balance inductor size, efficiency, and EMI performance without modifying the IC itself. The MIC2178-5.0BWM datasheet provides a precise RT vs. fSW lookup table for accurate selection.
Is the MIC2178-5.0BWM RoHS compliant and halogen-free?
Yes, the MIC2178-5.0BWM is RoHS compliant and halogen-free per Microchip's official product change notice and packaging specifications. It meets JEDEC J-STD-609 Class 1 for bromine and chlorine content and is rated for lead-free reflow soldering (MSL3). These compliance attributes are documented in the MIC2178-5.0BWM's part marking, shipping documentation, and Microchip's environmental compliance portal - confirming suitability for global industrial and commercial deployments.
MIC2178-5.0BWM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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
MIC2178-5.0BWM FAQ
1.How can I place an order for MIC2178-5.0BWM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2178-5.0BWM 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 MIC2178-5.0BWM reliable?
The price and inventory of MIC2178-5.0BWM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2178-5.0BWM is usually 5 days.
3.What payment methods are accepted for MIC2178-5.0BWM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2178-5.0BWM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2178-5.0BWM?
MIC2178-5.0BWM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2178-5.0BWM 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 MIC2178-5.0BWM?
For technical support, including MIC2178-5.0BWM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2178-5.0BWM requirements.
6.How does Aetrix verify that MIC2178-5.0BWM is sourced from the original manufacturer or authorized distributors?
All MIC2178-5.0BWM 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 MIC2178-5.0BWM meets industry standards.
7.What is the process for return or replacement of MIC2178-5.0BWM?
All MIC2178-5.0BWM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2178-5.0BWM, 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 MIC2178-5.0BWM part is unused and in its original packaging.
Return procedure for MIC2178-5.0BWM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2178-5.0BWM Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
