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Microchip Technology MIC2177YWM-TR
- Part No.:
- MIC2177YWM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MIC2177YWM-TR.pdf
- Description:
- IC REG BUCK ADJ 2.5A 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,445
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Product details
Overview
MIC2177YWM-TR from Micrel is a 200 kHz synchronous buck (step-down) DC-DC regulator with internal 100 mΩ high-side P-channel and low-side N-channel MOSFETs, delivering up to 2.5 A output current across 4.5 V–16.5 V input range and supporting adjustable output voltage (1.25 V–16.5 V). It operates in automatic PWM/skip mode for >96% peak efficiency and features 100% duty cycle capability for low-dropout operation in battery-powered systems.
For engineers reviewing the MIC2177YWM-TR datasheet, MIC2177YWM-TR pinout, MIC2177YWM-TR application, or MIC2177YWM-TR equivalent, key selection criteria include its dual-mode efficiency optimization, internal current-mode control loop, 20-lead wide SO package thermal performance, and compatibility with Pb-free assembly requirements per PPCN #040004.
Technical Context
The MIC2177YWM-TR implements current-mode control with internal current sensing, enabling stable loop compensation and superior line regulation. Its PWM/skip-mode transition is triggered automatically at ~200 mA load threshold, with skip-mode minimum current set by external 2.2 nF capacitor on AUTO pin and PWM-mode current limit fixed at 4.7 A (typ.) under 12 V input.
It integrates an internal 3.3 V bias regulator (BIAS pin), undervoltage lockout (4.25 V turn-on, 4.15 V turn-off), thermal shutdown (>125 °C junction), and pulse-by-pulse current limiting. Synchronization support up to 300 kHz via SYNC pin enables EMI reduction in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 16.5 V - supports wide-input industrial and automotive battery rails without external pre-regulation |
| Output Current | Up to 2.5 A - sustained delivery enabled by integrated 100 mΩ MOSFETs and 20-lead wide SO thermal pad |
| Switching Frequency | 200 kHz (preset), syncable to 220–300 kHz - balances efficiency, size, and EMI in portable designs |
| Efficiency | Up to 96% - achieved via automatic PWM/skip mode switching and synchronous rectification |
| Quiescent Current | 500 µA (skip), 1.0 mA (PWM), <5 µA (shutdown) - extends battery life in standby and light-load states |
| Duty Cycle Range | 0–100% - maintains regulation down to VIN–VOUT <1 V, critical for low-dropout battery discharge scenarios |
| Feedback Reference | 1.245 V (±2.5 mV over –40°C to +85°C) - enables precise adjustable output with minimal resistor divider error |
Pinout & Package
Package: 20-lead Wide SO (WSOP), Pb-free, –40°C to +85°C operating temperature range, with exposed thermal pad for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 9 - VIN | Unregulated Input Supply | Power input for controller, gate drivers, and internal bias regulator; all three pins must be connected in parallel to minimize impedance |
| 3, 8 - SW | Half-Bridge Switch Node | Drain connection of internal P-channel and N-channel MOSFETs; requires low-inductance routing to inductor and diode |
| 4–7 - PGND | Power Ground Return | High-current return path for switch node and output stage; must connect to dedicated ground plane under IC |
| 10 - OUT | Output Voltage Sense | Senses VOUT to determine minimum switch current for PWM activation; direct connection avoids trace resistance error |
| 11 - AUTO | Mode Selection Timing Input | Connects to 2.2 nF capacitor to enable automatic PWM/skip transition; pulled low forces PWM-only operation |
| 12 - FB | Feedback Input | Inverting input of error amplifier; sets output voltage via external resistive divider (R1/R2) referenced to 1.245 V internal reference |
| 13 - COMP | Error Amplifier Output | Compensation node requiring series RC network (e.g., 5–20 kΩ + 4.7–10 nF) to stabilize control loop |
| 14–17 - SGND | Signal Ground Reference | Low-noise reference for feedback, compensation, and enable circuitry; isolated from PGND except at single-point ground plane |
| 18 - SYNC | External Clock Input | Accepts 220–300 kHz logic-level clock for EMI reduction; tied to SGND if unused |
| 19 - BIAS | Internal 3.3 V Regulator Output | Bypassed with 0.01 µF ceramic capacitor; no external load permitted - supplies only internal control circuits |
| 20 - EN | Enable Control Input | Logic-high (>1.6 V) enables operation; logic-low (<0.8 V) enters <5 µA shutdown; must not float |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM/Skip Mode Switching | Reduces light-load quiescent current to 500 µA while maintaining regulation - eliminates need for manual mode selection |
| Integrated Dual MOSFET Power Stage | 100 mΩ high-side P-channel + 100 mΩ low-side N-channel at 12 V - eliminates external FETs and gate drivers for compact 2.5 A solutions |
| Current-Mode Control Architecture | Enables stable loop compensation with single-pole-zero network and superior line regulation - simplifies design vs. voltage-mode alternatives |
| 100% Duty Cycle Capability | Maintains regulation when VIN–VOUT <1 V - essential for deep battery discharge in handheld instruments and cellular telephones |
| Thermal & Overcurrent Protection | Combines pulse-by-pulse current limiting (4.7 A typ.) and thermal shutdown (>125 °C) - prevents damage during overload or poor heatsinking |
| Pb-Free Packaging | 20-lead wide SO with lead finish compliant with PPCN #040004 - meets RoHS requirements for commercial and industrial PCB assembly |
Applications
| Laptop Computer Power Rails | Cellular Telephone Baseband Supplies |
|---|---|
Use Scenario: Generating 3.3 V or 5 V core voltage for Intel/AMD chipset or baseband processor from 7–12 V battery or adapter input. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated, high-efficiency DC-DC conversion with automatic light-load optimization. Use Value: Extends runtime by reducing quiescent current to 500 µA in skip mode during CPU idle states while sustaining 2.5 A peak for burst processing. |
Use Scenario: Supplying 2.8 V–3.3 V RF transceiver and application processor rails from single-cell Li-ion (3.0–4.2 V) or multi-cell battery packs (7–16.5 V). IC Role / Device Role / Timing Role: Adjustable-output buck regulator with 100% duty cycle support for low-VIN dropout during battery depletion. Use Value: Maintains stable output down to VIN–VOUT <0.5 V, enabling full utilization of battery capacity without brownout during transmit bursts. |
| Hand-Held Instrumentation Power | Battery Charger Auxiliary Supply |
Use Scenario: Providing isolated 5 V or adjustable output for microcontroller, ADC, and sensor interface in portable multimeters or data loggers. IC Role / Device Role / Timing Role: High-efficiency, low-noise step-down regulator with internal MOSFETs and current-mode control for precision analog subsystems. Use Value: Delivers <10 mVpp output ripple (with proper COUT/ESR) and <5 µA shutdown current - preserves battery charge during extended storage. |
Use Scenario: Generating 3.3 V bias supply for charger controller IC, communication interface (I²C/UART), and status LEDs in smart battery chargers. IC Role / Device Role / Timing Role: Secondary buck regulator powered from main charging rail (e.g., 12–16.5 V) to feed low-power system management functions. Use Value: Eliminates need for discrete FETs and external compensation components - reduces BOM count and layout area in cost-sensitive consumer chargers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2307DN-LF-Z (Monolithic Power) | 3 A rated, 340 kHz fixed frequency, no skip mode - higher switching loss at light loads | Requires external compensation; lacks AUTO pin for seamless mode transition | Select when higher output current or smaller inductor size is prioritized over ultra-low IQ |
| TPS54202DRCT (Texas Instruments) | 2 A rated, 400–2200 kHz adjustable frequency, Eco-mode™ instead of skip mode - different light-load behavior | Includes soft-start and power-good; uses different pinout and compensation scheme | Prefer when programmable frequency, integrated PG, or tighter output tolerance (±1%) is required |
Compared with MP2307DN-LF-Z and TPS54202DRCT, the MIC2177YWM-TR offers unique automatic PWM/skip mode selection via the AUTO pin, lower quiescent current in skip mode (500 µA vs. ~1 mA), and native 100% duty cycle support - making it optimal for battery-powered systems demanding both peak efficiency and deep dropout operation.
Availability
MIC2177YWM-TR is available at Aetrix Electronics and suitable for laptop computer power rails, cellular telephone baseband supplies, and hand-held instrumentation requiring stable component supply with Pb-free compliance and industrial temperature range support.
Supply support for MIC2177YWM-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
Micrel, Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC2177 product line was designed for high-efficiency, battery-powered DC-DC conversion in portable electronics, emphasizing integrated power stages, automatic efficiency modes, and robust protection features for unattended operation.
FAQ
What output voltage does the MIC2177YWM-TR support?
The MIC2177YWM-TR is the adjustable-output version of the MIC2177 family and supports output voltages from 1.25 V to 16.5 V, set by an external resistive divider connected to the FB pin. Its internal 1.245 V reference (±2.5 mV) enables precise regulation, and the device maintains stability across the full range with appropriate compensation network selection.
How does the MIC2177YWM-TR switch between PWM and skip mode?
The MIC2177YWM-TR automatically switches between PWM and skip mode based on load current: it enters skip mode below ~200 mA and returns to PWM above ~300 mA. This transition is controlled by the AUTO pin, which monitors feedback voltage deviation and uses an internal 2.2 nF timing capacitor to prevent mode oscillation during mid-range loads.
What is the maximum output current capability of the MIC2177YWM-TR?
The MIC2177YWM-TR delivers up to 2.5 A continuous output current, enabled by its integrated 100 mΩ high-side P-channel and low-side N-channel MOSFETs. Peak current capability reaches 4.7 A (typ.) under pulse-by-pulse current limiting, and thermal shutdown activates above 125 °C junction temperature to protect the device during overload conditions.
Can the MIC2177YWM-TR operate with input voltage below 4.5 V?
No - the MIC2177YWM-TR incorporates undervoltage lockout (UVLO) that disables operation when VIN falls below 4.25 V (typ. turn-on threshold) and remains off until VIN rises above 4.35 V. Below 4.5 V, the internal MOSFETs cannot sustain sufficient gate drive, and regulation is not guaranteed; operation outside the 4.5 V–16.5 V specified range may cause malfunction or damage.
What package type and lead finish does the MIC2177YWM-TR use?
The MIC2177YWM-TR uses a 20-lead wide SO (WSOP) package with Pb-free lead finish, compliant with Micrel's PPCN #040004 effective January 1, 2005. It features an exposed thermal pad for improved heat dissipation and operates across –40°C to +85°C ambient temperature, with junction temperature rated to +125°C.
MIC2177YWM-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:
- 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
MIC2177YWM-TR FAQ
1.How can I place an order for MIC2177YWM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2177YWM-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 MIC2177YWM-TR reliable?
The price and inventory of MIC2177YWM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2177YWM-TR is usually 5 days.
3.What payment methods are accepted for MIC2177YWM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2177YWM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2177YWM-TR?
MIC2177YWM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2177YWM-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 MIC2177YWM-TR?
For technical support, including MIC2177YWM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2177YWM-TR requirements.
6.How does Aetrix verify that MIC2177YWM-TR is sourced from the original manufacturer or authorized distributors?
All MIC2177YWM-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 MIC2177YWM-TR meets industry standards.
7.What is the process for return or replacement of MIC2177YWM-TR?
All MIC2177YWM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2177YWM-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 MIC2177YWM-TR part is unused and in its original packaging.
Return procedure for MIC2177YWM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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