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Microchip Technology MIC4680-5.0YM
- Part No.:
- MIC4680-5.0YM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC4680-5.0YM.pdf
- Description:
- IC REG BUCK 5V 1.3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,696
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Product details
Overview
MIC4680-5.0YM from Micrel is a fixed-output 5.0V, 1.3A synchronous buck regulator in an 8-pin Power SOIC package, operating at 200kHz with 4V–34V input range and internal compensation for fast transient response-designed for high-efficiency on-card DC/DC conversion in industrial power supplies.
For engineers reviewing the MIC4680-5.0YM datasheet, MIC4680-5.0YM pinout, MIC4680-5.0YM application, or MIC4680-5.0YM equivalent, this page delivers verified electrical specs, thermal layout guidance, shutdown behavior, feedback interface details, and real-world efficiency curves across load and input voltage conditions.
Technical Context
The MIC4680-5.0YM implements voltage-mode control using a 1.23V internal bandgap reference and a 200kHz oscillator to generate PWM duty cycle; feedback is internally tied to output, eliminating external resistor dividers. Cycle-by-cycle current limiting and thermal shutdown protect against overloads and junction temperatures exceeding 160°C.
Its Power SOIC-8 package integrates pins 5–8 and the die-attach paddle into a single low-θJC (20°C/W) thermal path, enabling 1.3A continuous output when mounted on ≥6 cm² ground plane-distinct from standard SOIC-8 due to enhanced copper mass and thermal conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0V ±1% (guaranteed over –40°C to +125°C junction temp) |
| Continuous Output Current | 1.3A (requires ≥6 cm² PCB ground plane for thermal compliance) |
| Input Voltage Range | 4V to 34V (supports wide industrial rails including 12V, 24V, and 32V systems) |
| Switching Frequency | 200kHz ±10% (fixed, enables predictable EMI filtering and compact magnetics) |
| Shutdown Quiescent Current | 30µA typical at VSHDN = 5V (enables ultra-low-power standby in battery-backed systems) |
| Efficiency | Up to 90% at 1A/5V output with 12V input (reduces thermal load vs. linear regulators) |
| Thermal Shutdown Threshold | 160°C (hysteresis prevents oscillation; resumes operation after ~140°C cooldown) |
Pinout & Package
Package: 8-pin Power SOIC (M), with integrated thermal paddle connected to pins 5–8 (GND). Designed for surface-mount assembly and high-power dissipation (θJA = 63°C/W on 1"² FR4 board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | SHDN | TTL-compatible shutdown input: logic low (≤0.8V) enables regulator; logic high (≥1.6V) disables with <30µA standby draw |
| 2 | VIN | Main unregulated input (4V–34V); connects to bulk capacitor CIN near pin for low-impedance supply path |
| 3 | SW | Internal NPN switch emitter node; connects directly to inductor L1 and Schottky diode cathode (D1) |
| 4 | FB | Internally connected to 5.0V output; no external divider required-simplifies layout and improves stability |
| 5–8 | GND | Common ground return for power, feedback, and thermal path; all four pins tied to internal paddle for low-θJA |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5.0V output | Eliminates external feedback resistors-reduces BOM count and layout sensitivity to noise on FB node |
| Internally compensated | Enables stable operation with standard 68µH inductor and 220µF output capacitor-no loop compensation design needed |
| Power SOIC-8 thermal design | Pins 5–8 and die paddle form unified thermal path-delivers 1.3A output without heatsink on adequate PCB copper |
| Cycle-by-cycle current limit | Clamps peak switch current at 1.3–2.5A (depending on VFB)-prevents damage during short-circuit or overload |
| Frequency foldback under fault | Reduces switching frequency to ~30–100kHz during hard short-limits energy per cycle and improves reliability |
Applications
| Industrial 12V-to-5V Pre-regulator | On-Card DC/DC Converter |
|---|---|
Use Scenario: Converting 12V rail to clean 5V for microcontroller, FPGA I/O, or sensor interfaces in factory automation PLCs. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5V at up to 1.3A with minimal external components. Use Value: Replaces TO-220-based solutions with 60% smaller footprint and eliminates need for external compensation network. |
Use Scenario: Local point-of-load regulation on dense PCBs where space and thermal management are constrained. IC Role / Device Role / Timing Role: Integrated switch-mode regulator delivering stable 5V from wide-input industrial bus. Use Value: Achieves >85% efficiency at 1A with only 4 external parts-reducing board area and improving system-level thermal margin. |
| Battery Backup System Supply | Negative Voltage Generator |
Use Scenario: Providing 5V standby power from 4–34V battery bank (e.g., 24V lead-acid or LiFePO₄) in telecom or security equipment. IC Role / Device Role / Timing Role: High-input-range buck regulator with <30µA shutdown current-extending battery life during sleep mode. Use Value: Enables >72-hour backup runtime at 10mA standby load while maintaining fast wake-up capability. |
Use Scenario: Generating –5V from +5V or +12V input for op-amp biasing or RS-232 level-shifting in instrumentation. IC Role / Device Role / Timing Role: Configured as inverting buck-boost converter using external diode and inductor. Use Value: Delivers up to 300mA negative output without requiring dedicated inverting IC-reducing component count and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2576-5.0 | 5V fixed, 3A output, 52kHz switching, requires external diode and compensation | Lower frequency eases EMI filtering but needs larger inductor; higher current rating suits heavier loads | Select when >1.3A output or lower EMI priority outweighs board space constraints |
| TPS54302DDCR | 5V fixed, 3A, 2.5MHz, integrated high-side FET, requires external compensation | Higher frequency allows tiny 1µH inductors but demands careful layout; no thermal shutdown hysteresis | Select for ultra-compact designs where PCB area is critical and thermal monitoring is handled externally |
Compared with LM2576-5.0 and TPS54302DDCR, the MIC4680-5.0YM offers best-in-class thermal integration via its Power SOIC-8 package and requires zero external compensation-making it optimal for robust, medium-current industrial supplies where layout simplicity and thermal reliability are prioritized over peak current or miniaturization.
Availability
MIC4680-5.0YM is available at Aetrix Electronics and suitable for industrial power supplies, on-card DC/DC conversion, and battery-backed systems requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.
Supply support for MIC4680-5.0YM 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 analog and power IC designer acquired by Microchip Technology in 2015; known for high-reliability DC/DC regulators, timing devices, and Ethernet PHYs.
The MIC4680 family was engineered as a drop-in replacement for TO-220/TO-263 linear and switching regulators-targeting space-constrained industrial, automotive, and telecom power systems needing 1A+ output with minimal external parts.
FAQ
What is the maximum continuous output current of the MIC4680-5.0YM?
The MIC4680-5.0YM delivers up to 1.3A continuous output current when mounted on a PCB with ≥6 cm² ground plane connected to pins 5–8. At ambient temperatures above 60°C or with insufficient copper area, derating applies-see Figure 3 in the datasheet for current vs. ground-plane area curves. The MIC4680-5.0YM achieves this with internal thermal shutdown at 160°C and cycle-by-cycle current limiting.
Does the MIC4680-5.0YM require external feedback resistors?
No-the MIC4680-5.0YM is a fixed 5.0V output variant with internal feedback divider; pin 4 (FB) is internally connected to the output, eliminating external resistors. This simplifies layout, improves noise immunity, and ensures consistent regulation without resistor tolerance drift. For adjustable versions like MIC4680BM, external R1/R2 are required.
How does the MIC4680-5.0YM behave during shutdown?
When SHDN (pin 1) is pulled high (>1.6V), the MIC4680-5.0YM disables its internal switch and reduces quiescent current to 30µA typical (at VSHDN = 5V). The output discharges through the external circuit; no reverse current flows from VOUT to VIN. During shutdown, the SW pin floats and FB remains at 5V-ensuring clean disable/enable transitions without output voltage glitches.
Can the MIC4680-5.0YM be used in a negative-output configuration?
Yes-the MIC4680-5.0YM can be configured as an inverting buck-boost converter to generate negative voltages (e.g., –5V from +12V). The functional diagram shows this topology: SW connects to inductor, FB ties to negative output via resistor divider, and GND becomes the negative rail. Efficiency and output current are reduced vs. buck mode, but it avoids needing a dedicated inverting controller.
What thermal design guidelines apply to the MIC4680-5.0YM's Power SOIC-8 package?
The MIC4680-5.0YM's Power SOIC-8 uses pins 5–8 and the internal paddle as a unified thermal path. To maintain ≤125°C junction temperature, connect all four GND pins to ≥6 cm² of inner-layer or top-layer copper. Avoid thermal relief on these pins. Layout traces for VIN, SW, and GND must be wide and short-especially the SW-to-inductor and GND-return paths-to minimize switching losses and EMI.
MIC4680-5.0YM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SuperSwitcher™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 34V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.3A
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC4680-5.0YM FAQ
1.How can I place an order for MIC4680-5.0YM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4680-5.0YM 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 MIC4680-5.0YM reliable?
The price and inventory of MIC4680-5.0YM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4680-5.0YM is usually 5 days.
3.What payment methods are accepted for MIC4680-5.0YM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4680-5.0YM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4680-5.0YM?
MIC4680-5.0YM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4680-5.0YM 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 MIC4680-5.0YM?
For technical support, including MIC4680-5.0YM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4680-5.0YM requirements.
6.How does Aetrix verify that MIC4680-5.0YM is sourced from the original manufacturer or authorized distributors?
All MIC4680-5.0YM 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 MIC4680-5.0YM meets industry standards.
7.What is the process for return or replacement of MIC4680-5.0YM?
All MIC4680-5.0YM units undergo pre-shipment inspection (PSI). If there is an issue with MIC4680-5.0YM, 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 MIC4680-5.0YM part is unused and in its original packaging.
Return procedure for MIC4680-5.0YM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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