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Microchip Technology MIC2177-3.3YWM-TR
- Part No.:
- MIC2177-3.3YWM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2177-3.3YWM-TR.pdf
- Description:
- IC REG BUCK 3.3V 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:802
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Product details
Overview
MIC2177-3.3YWM-TR from Microchip Technology is a 2.5A synchronous buck (step-down) DC-DC regulator with fixed 3.3V 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 battery-powered portable instrumentation.
For engineers reviewing the MIC2177-3.3YWM-TR datasheet, MIC2177-3.3YWM-TR pinout, MIC2177-3.3YWM-TR application, or MIC2177-3.3YWM-TR equivalent, key selection criteria include its 3.3V fixed output accuracy (±3.5% over line/load/temp), 200kHz preset switching frequency, 100% duty cycle capability for low-dropout operation, and thermal/UVLO/shutdown protection - all in a thermally enhanced 20-pin wide SOIC package.
Technical Context
The MIC2177-3.3YWM-TR implements current-mode control with internal current sensing, enabling simplified loop compensation and superior line regulation. Its dual-mode operation automatically selects PWM mode above ~220mA load and skip mode below ~300mA, optimizing efficiency across wide load ranges without external mode control logic.
It features a dedicated AUTO pin with 2.2nF timing capacitor for seamless mode transition, integrated 3.3V bias regulator (BIAS pin), SYNC input supporting external clock synchronization up to 300kHz, and anti-shoot-through circuitry ensuring safe half-bridge switching between P-channel and N-channel MOSFETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.5% (VOUT = 3.20–3.46V at 10mA–2A, 5–16V VIN) |
| Input Voltage Range | 4.5V to 16.5V - supports 12V rail and wide-input industrial/battery systems |
| Max Output Current | 2.5A continuous - sufficient for FPGA core rails or multi-core microcontrollers |
| Switching Frequency | 200kHz preset (±20%) - balances EMI, inductor size, and efficiency |
| Efficiency | Up to 96% - achieved via synchronous rectification and dual-mode optimization |
| Quiescent Current | 500μA in Skip Mode - extends battery life in standby/sleep states |
| Duty Cycle Range | 0–100% - enables low-dropout operation down to VIN–VOUT < 1V |
| Protection Features | Current limit (4.7A typ), thermal shutdown, UVLO (4.25V turn-on), shutdown (<5μA) |
Pinout & Package
Package: 20-pin Wide SOIC (WM), 11.0mm × 7.6mm × 2.3mm body, exposed thermal pad (PGND-connected), –40°C to +85°C ambient operating temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 9 VIN | Unregulated Input Supply | Connects to 4.5–16.5V source; supplies internal regulator, switches, and control logic; requires local bypass to PGND |
| 3, 8 SW | Half-Bridge Switch Node | Drain of internal P-MOSFET and source of N-MOSFET; connects to inductor and output diode anode |
| 4–7 PGND | Power Ground | High-current return path for output stage; must connect to solid ground plane for thermal and EMI performance |
| 10 OUT | Output Sense Input | Monitors output voltage to determine minimum switch current threshold for PWM mode activation |
| 11 AUTO | Auto-Mode Timing Control | Accepts 2.2nF capacitor to set hysteresis for automatic PWM/skip transitions; pulled low forces PWM-only operation |
| 12 FB | Feedback Input | Direct connection to 3.3V output (fixed version); internal reference is 1.245V; no external divider required |
| 13 COMP | Error Amplifier Output | Connects to RC compensation network (e.g., 5kΩ + 4.7nF) to stabilize control loop |
| 14–17 SGND | Signal Ground | Low-noise reference for control circuitry; separate from PGND but tied at single point on PCB |
| 18 SYNC | External Clock Input | Accepts 220–300kHz square wave; rising edge synchronizes oscillator; tie to SGND if unused |
| 19 BIAS | Internal 3.3V Bias Supply | Provides regulated 3.3V for internal logic; decouple with 0.01μF to SGND; no external load permitted |
| 20 EN | Enable Input | Logic-high (>1.6V) enables regulation; logic-low (<0.8V) disables output and reduces IQ to <5μA |
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 |
| Automatic Dual-Mode Operation | PWM/skip mode switching triggered by load current (220–300mA hysteresis) - no external control needed |
| 100% Duty Cycle Capability | Enables dropout as low as VOUT + (RON × ILOAD) - supports near-battery-input operation in portable systems |
| Current-Mode Control | Internal current sensing + corrective ramp - simplifies compensation and improves transient response |
| Thermal & Electrical Protection | Thermal shutdown, pulse-by-pulse current limiting, UVLO, and <5μA shutdown IQ - ensures robust field reliability |
| SYNC Input Compatibility | Supports external clock up to 300kHz - enables EMI reduction via frequency dithering or system-level clock alignment |
Applications
| Handheld Test Instruments | Laptop Subsystem Rails |
|---|---|
Use Scenario: Portable multimeters and oscilloscope probes requiring stable 3.3V supply from 7.4V Li-ion battery packs with variable discharge voltage. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated 3.3V to MCU, ADC, and interface ICs under dynamic load conditions. Use Value: 96% peak efficiency and 500μA skip-mode IQ extend battery runtime; 100% duty cycle maintains regulation down to 3.6V input. | Use Scenario: Powering USB-C PD controller, embedded security module, or touchpad controller in ultrabook designs with constrained board space. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load converter replacing discrete buck solutions with external MOSFETs. Use Value: Integrated 2.5A power stage and current-mode control reduce component count and improve transient response to burst loads. |
| Battery-Powered Medical Sensors | Industrial IoT Edge Nodes |
Use Scenario: Wearable ECG monitors powered by coin-cell or small LiPo batteries needing ultra-low quiescent current during sleep cycles. IC Role / Device Role / Timing Role: Main power regulator supplying 3.3V to BLE SoC and analog front-end with tight output tolerance. Use Value: <5μA shutdown IQ and 500μA skip-mode operation minimize standby drain; ±3.5% output accuracy meets medical sensor precision requirements. | Use Scenario: Remote environmental sensors deployed in unattended locations using 12V solar-charged batteries with wide temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: Robust primary DC-DC converter powering microcontroller, LoRa transceiver, and analog signal chain. Use Value: Thermal shutdown and UVLO ensure reliable operation across extreme ambient conditions; wide 4.5–16.5V input accommodates battery voltage fluctuations. |
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 | 3.3V fixed, 0.6A max, 2MHz switching, no skip mode, smaller TSOT23-6 package | Suitable only for low-power peripherals; lacks 2.5A capability and low-IQ skip mode | Select when board space is critical and load <600mA; not drop-in for MIC2177-3.3YWM-TR's 2.5A use cases |
| TPS54202DRCT | Adjustable output (0.6–17V), 2A max, 500kHz, integrated soft-start, no AUTO pin for auto-mode | Requires external feedback resistors and manual mode control; higher IQ in light load | Choose when adjustable output or higher frequency is needed; design effort increases due to compensation and mode management |
Compared with MP2451DT-LF-Z and TPS54202DRCT, the MIC2177-3.3YWM-TR uniquely combines 2.5A output, automatic PWM/skip mode, 100% duty cycle, and ultra-low 500μA skip-mode IQ - making it optimal for high-current, battery-sensitive applications where efficiency across full load range is critical.
Availability
MIC2177-3.3YWM-TR is available at Aetrix Electronics and suitable for handheld instruments, battery-powered medical sensors, and industrial IoT edge nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC2177-3.3YWM-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 leading provider of microcontrollers, analog devices, and power management ICs, serving automotive, industrial, communications, and consumer markets with vertically integrated silicon and software solutions.
The MIC2177 product line delivers high-efficiency synchronous buck regulators for battery-powered and wide-input industrial applications, emphasizing integration, thermal robustness, and adaptive efficiency modes without external complexity.
FAQ
What is the output voltage tolerance of the MIC2177-3.3YWM-TR over temperature and load?
The MIC2177-3.3YWM-TR delivers a fixed 3.3V output with ±3.5% tolerance (3.20V to 3.46V) across –40°C to +85°C ambient temperature, 5V to 16V input, and 10mA to 2A load current. This specification is confirmed in the Electrical Characteristics table (DS20006298A-page 3) for the MIC2177-3.3 variant and validated by Figure 2-3 showing reference voltage stability over temperature.
Does the MIC2177-3.3YWM-TR require external feedback resistors?
No, the MIC2177-3.3YWM-TR does not require external feedback resistors. As a fixed-output variant, its FB pin is internally connected to the 1.245V reference and must be connected directly to the 3.3V output node per the Pin Descriptions (DS20006298A-page 8). External resistors are only required for the adjustable MIC2177 version.
How does the AUTO pin function in the MIC2177-3.3YWM-TR?
The AUTO pin on the MIC2177-3.3YWM-TR accepts a 2.2nF capacitor to enable automatic PWM/skip mode transitions based on load current. When the output voltage drops 3% below nominal, the low-output comparator pulls AUTO low, triggering PWM mode. The 10μA current source then charges the capacitor, maintaining PWM operation for several cycles to prevent mode oscillation - fully detailed in Section 4.11 of DS20006298A.
What is the maximum junction temperature and thermal shutdown behavior of the MIC2177-3.3YWM-TR?
The MIC2177-3.3YWM-TR has a maximum junction temperature of +125°C and activates thermal shutdown when TJ exceeds this limit. After shutdown, the device remains off until the junction temperature falls approximately 10°C below the trip point, as specified in Section 4.3 and Temperature Specifications (DS20006298A-page 4). The wide SOIC package with exposed thermal pad aids heat dissipation.
Can the MIC2177-3.3YWM-TR operate with input voltage below 4.5V?
No, the MIC2177-3.3YWM-TR cannot operate reliably below 4.5V input. Its undervoltage lockout (UVLO) turns on at 4.25V (typical) and turns off at 4.15V (typical), as specified in the Electrical Characteristics table (DS20006298A-page 3). Operation below 4.5V risks insufficient gate drive for the internal MOSFETs and unregulated output.
MIC2177-3.3YWM-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:
- 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):
- 3.3V
- 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
MIC2177-3.3YWM-TR FAQ
1.How can I place an order for MIC2177-3.3YWM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2177-3.3YWM-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 MIC2177-3.3YWM-TR reliable?
The price and inventory of MIC2177-3.3YWM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2177-3.3YWM-TR is usually 5 days.
3.What payment methods are accepted for MIC2177-3.3YWM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2177-3.3YWM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2177-3.3YWM-TR?
MIC2177-3.3YWM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2177-3.3YWM-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 MIC2177-3.3YWM-TR?
For technical support, including MIC2177-3.3YWM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2177-3.3YWM-TR requirements.
6.How does Aetrix verify that MIC2177-3.3YWM-TR is sourced from the original manufacturer or authorized distributors?
All MIC2177-3.3YWM-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 MIC2177-3.3YWM-TR meets industry standards.
7.What is the process for return or replacement of MIC2177-3.3YWM-TR?
All MIC2177-3.3YWM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2177-3.3YWM-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 MIC2177-3.3YWM-TR part is unused and in its original packaging.
Return procedure for MIC2177-3.3YWM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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