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Microchip Technology MIC2177-5.0BWM-TR
- Part No.:
- MIC2177-5.0BWM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2177-5.0BWM-TR.pdf
- Description:
- IC REG BUCK 5V 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,112
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Product details
Overview
MIC2177-5.0BWM-TR from Microchip Technology is a 2.5A synchronous buck (step-down) DC-DC regulator with fixed 5.0V output, operating from 4.5V to 16.5V input. It integrates 100mΩ high-side P-channel and low-side N-channel MOSFETs, uses current-mode control, supports automatic PWM/skip mode switching, and delivers up to 96% efficiency in laptop computer power rails.
For engineers reviewing the MIC2177-5.0BWM-TR datasheet, MIC2177-5.0BWM-TR pinout, MIC2177-5.0BWM-TR application, or MIC2177-5.0BWM-TR equivalent, key selection considerations include its 200kHz preset switching frequency, 100% duty cycle for low-dropout operation, 500μA skip-mode quiescent current, thermal shutdown, and UVLO with 4.25V turn-on threshold.
Technical Context
The MIC2177-5.0BWM-TR implements current-mode control with internal current sensing, enabling simplified loop compensation and superior line regulation. Its dual-mode operation-PWM above 200mA and skip mode below-is automatically selected via the AUTO pin using a 2.2nF capacitor and internal comparator hysteresis.
It features a half-H-bridge switch stage with anti-shoot-through logic, 3.3V internal bias regulator (BIAS pin), SYNC input supporting 220–300kHz external clock synchronization, and undervoltage lockout with 4.25V upper/4.15V lower thresholds. The device operates across –40°C to +85°C ambient temperature in its 20-pin wide SOIC package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2.5% (4.85–5.15V) at 10mA–2A load, enabling direct replacement of linear regulators in 5V rail applications. |
| Input Voltage Range | 4.5V to 16.5V - supports 5V, 12V, and automotive battery-derived supplies without pre-regulation. |
| Max Output Current | 2.5A continuous - sufficient for powering core logic, I/O, and peripherals in portable computing systems. |
| Switching Frequency | 200kHz preset (±20%) - balances EMI, inductor size, and efficiency; synchronizable to 220–300kHz external clock. |
| Quiescent Current | 500μA in skip mode - extends battery life in standby or light-load states such as sleep mode in handheld instruments. |
| Duty Cycle Range | 0–100% - maintains regulation down to VIN–VOUT < 1V, critical for low-dropout operation near end-of-battery conditions. |
| Thermal Shutdown | Activates at TJ > +125°C - protects against sustained overload or poor heatsinking in enclosed industrial enclosures. |
| UVLO Threshold | 4.25V (turn-on), 4.15V (turn-off) - prevents erratic startup or brownout behavior during input voltage sag. |
Pinout & Package
Package: 20-pin Wide SOIC (WM), 11.0mm × 7.6mm body, exposed thermal pad (not electrically connected), –40°C to +85°C ambient operating range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2,9 VIN | Unregulated Input Supply | Three parallel pins for high-current connection to 4.5–16.5V source; requires local 22μF/35V + 0.1μF ceramic bypass to PGND. |
| 3,8 SW | Half-Bridge Switch Node | Drain connection of internal P-channel and N-channel MOSFETs; must be externally shorted and routed with low-inductance trace to inductor. |
| 4–7 PGND | Power Ground Return | Four dedicated pins for high-current return path from switches; must connect to solid ground plane under IC footprint. |
| 10 OUT | Output Voltage Sense | Direct connection to regulated 5V output node; enables accurate minimum-switch-current detection for PWM/skip transition. |
| 11 AUTO | Mode Selection Control | Connects to 2.2nF capacitor to enable automatic PWM/skip switching; pulled low forces PWM-only operation. |
| 12 FB | Feedback Input | Internally tied to 5.0V output (fixed version); no external divider required - simplifies layout and eliminates resistor tolerance error. |
| 13 COMP | Error Amplifier Output | Compensation node requiring RC network (e.g., 5kΩ + 4.7nF) to stabilize control loop across line/load transients. |
| 14–17 SGND | Signal Ground Reference | Four pins for low-noise analog/digital reference; must tie to same ground plane as PGND but with star-point separation if possible. |
| 18 SYNC | External Clock Input | Accepts 220–300kHz square wave; rising edge resets oscillator - used to eliminate beat frequencies in multi-rail systems. |
| 19 BIAS | Internal 3.3V Regulator Output | Provides bias for internal circuitry; decoupled with 0.01μF ceramic to SGND; zero external load permitted. |
| 20 EN | Enable/Shutdown Control | Active-high logic input; <0.8V disables regulator, reducing IQ to <5μA - supports system-level power sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 100mΩ high-side P-MOSFET + 100mΩ low-side N-MOSFET at 12V - eliminates external FETs and gate drivers, reducing BOM count and board area. |
| Automatic Mode Switching | Seamless transition between PWM (>200mA) and skip mode (<200mA) using on-chip comparators and AUTO pin timing - no external controller needed. |
| Low-Dropout Operation | 100% duty cycle capability - sustains 5.0V output even when input drops to 5.2V, extending usable battery capacity in portable devices. |
| Current-Mode Control | Internal current sensing + corrective ramp - provides inherent cycle-by-cycle current limiting and stable loop response without complex compensation. |
| Protection Functions | Integrated pulse-by-pulse current limit (4.7A typ), thermal shutdown, and UVLO - eliminates need for discrete protection circuitry in cost-sensitive designs. |
| Low Quiescent Power | 500μA in skip mode, <5μA in shutdown - directly improves standby time in battery-powered instrumentation and IoT endpoints. |
Applications
| Laptop Computer Power Rail | Handheld Test Instrument |
|---|---|
Use Scenario: Providing clean, efficient 5V supply to USB controllers, display interface ICs, and microcontroller peripherals in clamshell-form-factor laptops. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering up to 2.5A at 5V with automatic light-load optimization. Use Value: Achieves >92% efficiency at 100mA and >95% at 1A (VIN=12V), reducing thermal load and enabling fanless design. | Use Scenario: Powering mixed-signal data acquisition circuits (ADCs, op-amps, FPGA I/O banks) in portable oscilloscopes and multimeters. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter supplying regulated 5V from Li-ion battery pack (8–16.5V). Use Value: 500μA skip-mode IQ extends battery runtime during measurement idle periods without sacrificing transient response. |
| Cellular Baseband Module | Battery Charger Auxiliary Rail |
Use Scenario: Generating stable 5V rail for baseband processors and RF front-end bias in LTE/5G small-cell modules. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with 200kHz switching to avoid interference with cellular bands. Use Value: 200kHz fixed frequency avoids AM radio band (530–1710kHz) and simplifies EMI filtering versus variable-frequency alternatives. | Use Scenario: Powering charger management ICs, status LEDs, and communication interfaces (I²C, UART) in multi-cell Li-ion chargers. IC Role / Device Role / Timing Role: Secondary regulated supply derived from main charging input (9–16V), independent of battery voltage. Use Value: UVLO with 4.25V turn-on ensures reliable operation only when input is valid, preventing false start-up during AC adapter plug-in transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3A rated, 2MHz switching, adjustable output only; no fixed 5V variant; requires external feedback resistors. | Higher frequency enables smaller magnetics but increases EMI risk near sensitive RF sections. | Choose MP2451DT-LF-Z only if board space is constrained and 2MHz operation is acceptable; not drop-in for MIC2177-5.0BWM-TR. |
| TPS54202HDDCR | 2A rated, 4.5–17V input, integrated 100mΩ/100mΩ FETs, fixed 5V option (TPS54202HDDCT), 500kHz switching. | Higher switching frequency reduces inductor size but increases switching losses at high load; different pinout and compensation scheme. | TPS54202HDDCT offers pin-compatible 5V function but requires PCB redesign due to 8-pin SOIC vs. 20-pin WM package and distinct COMP/EN/SYNC mapping. |
Compared with MP2451DT-LF-Z and TPS54202HDDCT, the MIC2177-5.0BWM-TR provides optimal balance of 2.5A capability, 200kHz EMI profile, fixed 5V simplicity, and ultra-low skip-mode IQ - making it preferred for thermally constrained, battery-sensitive applications where predictable light-load behavior is critical.
Availability
MIC2177-5.0BWM-TR is available at Aetrix Electronics and suitable for laptop computers, handheld test instruments, cellular baseband modules, and battery charger auxiliary rails requiring stable component supply with full lifecycle support.
Supply support for MIC2177-5.0BWM-TR 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, with emphasis on reliability, longevity, and industrial-grade qualification.
The MIC2177 product line delivers high-efficiency synchronous buck regulators for battery-powered and wide-input industrial applications, designed specifically to replace linear regulators and discrete switcher solutions with minimal external components.
FAQ
What is the maximum output current capability of the MIC2177-5.0BWM-TR?
The MIC2177-5.0BWM-TR delivers up to 2.5A continuous output current under typical thermal conditions (TA = +25°C, 2-layer PCB with 1in² copper pour). At higher ambient temperatures or with limited airflow, derating applies per the thermal resistance θJA of 45°C/W. Peak current limit is 4.7A (typical) in PWM mode, protecting against short-circuit events without external current-sense components.
Does the MIC2177-5.0BWM-TR require external feedback resistors to set the output voltage?
No. The MIC2177-5.0BWM-TR is the fixed 5.0V output variant - the FB pin is internally connected to the output, eliminating the need for external resistors. This simplifies layout, removes resistor tolerance errors, and improves long-term output accuracy compared to adjustable versions like MIC2177-ADJ. Only the MIC2177-3.3 and MIC2177-5.0 variants offer this factory-trimmed fixed output.
How does the MIC2177-5.0BWM-TR handle low-input-voltage conditions near battery depletion?
The MIC2177-5.0BWM-TR maintains regulation down to VIN = 5.2V (at full load) using 100% duty cycle operation, where the high-side P-MOSFET remains continuously on. Undervoltage lockout disables the device only when VIN falls below 4.15V (hysteresis), preventing unstable operation. This allows extended runtime from single- or dual-cell Li-ion batteries before system shutdown.
Can the MIC2177-5.0BWM-TR be synchronized to an external clock signal?
Yes. The MIC2177-5.0BWM-TR accepts an external clock on the SYNC pin (Pin 18) within 220–300kHz. A logic-high pulse ≥500ns triggers oscillator reset on the rising edge, enabling precise frequency alignment in multi-rail systems to avoid heterodyne noise. If unused, SYNC must be tied to SGND - leaving it floating may cause erratic switching behavior.
What is the purpose of the AUTO pin on the MIC2177-5.0BWM-TR?
Pin 11 (AUTO) controls automatic PWM/skip mode selection. With a 2.2nF capacitor to SGND, the MIC2177-5.0BWM-TR transitions seamlessly between high-efficiency skip mode (<200mA) and high-performance PWM mode (>200mA). Pulling AUTO low forces PWM-only operation - useful in noise-sensitive applications like audio or RF circuits where variable-frequency skip mode could induce interference.
MIC2177-5.0BWM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
MIC2177-5.0BWM-TR FAQ
1.How can I place an order for MIC2177-5.0BWM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2177-5.0BWM-TR 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 MIC2177-5.0BWM-TR reliable?
The price and inventory of MIC2177-5.0BWM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2177-5.0BWM-TR is usually 5 days.
3.What payment methods are accepted for MIC2177-5.0BWM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2177-5.0BWM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2177-5.0BWM-TR?
MIC2177-5.0BWM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2177-5.0BWM-TR 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 MIC2177-5.0BWM-TR?
For technical support, including MIC2177-5.0BWM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2177-5.0BWM-TR requirements.
6.How does Aetrix verify that MIC2177-5.0BWM-TR is sourced from the original manufacturer or authorized distributors?
All MIC2177-5.0BWM-TR 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 MIC2177-5.0BWM-TR meets industry standards.
7.What is the process for return or replacement of MIC2177-5.0BWM-TR?
All MIC2177-5.0BWM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2177-5.0BWM-TR, 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 MIC2177-5.0BWM-TR part is unused and in its original packaging.
Return procedure for MIC2177-5.0BWM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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