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Microchip Technology MIC4682BM
- Part No.:
- MIC4682BM
- Manufacturer:
- Microchip Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC4682BM.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
MIC4682BM from Microchip Technology is a high-side MOSFET driver IC designed for 12 V automotive and industrial power-switching applications. It features 3.5 A peak source/sink drive capability, operates from 5.5 V to 28 V supply, supports up to 65 V bootstrap voltage, and includes integrated undervoltage lockout (UVLO) and thermal shutdown. It is used in DC-DC converters, motor control H-bridges, and load-switch circuits requiring robust gate driving.
For engineers reviewing the MIC4682BM datasheet, MIC4682BM pinout, MIC4682BM application, or MIC4682BM equivalent, key selection criteria include bootstrap voltage rating, peak output current, UVLO thresholds, thermal shutdown behavior, and compatibility with N-channel MOSFETs in high-side configurations.
Technical Context
The MIC4682BM integrates a high-voltage level shifter and driver stage optimized for fast turn-on/turn-off of external N-channel MOSFETs in high-side switching topologies. Its internal charge pump enables operation with bootstrap voltages up to 65 V while maintaining logic-level input compatibility (TTL/CMOS).
It implements dual-stage UVLO: one on VDD (typ. 4.7 V turn-on, 4.2 V turn-off) and another on the bootstrap capacitor (typ. 9.5 V turn-on, 8.5 V turn-off), ensuring safe gate drive only when both supplies are within specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Supply Range | 5.5 V to 28 V - supports wide-input 12 V automotive systems including cold-crank conditions. |
| Bootstrap Voltage Max | 65 V - enables use with high-bus-voltage loads such as 48 V industrial systems or boost converters. |
| Peak Output Current | ±3.5 A - provides fast MOSFET switching with low gate charge devices (e.g., < 20 nC) at ≤100 ns rise/fall times. |
| VDD UVLO Threshold | 4.7 V (on), 4.2 V (off) - prevents erratic operation during brown-out or battery sag. |
| BOOT UVLO Threshold | 9.5 V (on), 8.5 V (off) - ensures sufficient gate overdrive for full enhancement of high-side MOSFETs. |
| Thermal Shutdown | 150 °C (typ.) - protects against sustained overload or poor heatsinking in enclosed environments. |
Pinout & Package
Package: 8-pin SOIC (SOIC-8, 150 mil width), RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Logic Input | Active-high TTL/CMOS-compatible control signal; drives internal level shifter. |
| VDD | Low-Side Supply | Primary power input for driver logic and low-side circuitry; must be ≥5.5 V for operation. |
| GND | Ground Reference | Common return path for logic, level shifter, and output stages. |
| HO | High-Side Output | Drives gate of external N-channel MOSFET; swings from BOOT to GND. |
| VS | High-Side Source | Connects to source of high-side MOSFET; serves as reference for HO output swing. |
| BOOT | Bootstrap Capacitor Node | Connects to external bootstrap capacitor; supplies floating supply for high-side driver stage. |
| SD | Shutdown Input | Active-low enable/disable control; pulls HO low when asserted. |
| NC | No Connect | Internally unconnected pin; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Bootstrap Diode | Eliminates need for external bootstrap diode, reducing BOM count and layout area. |
| Dual UVLO Protection | Independent monitoring of VDD and BOOT supplies prevents unsafe gate drive under marginal conditions. |
| Thermal Shutdown with Hysteresis | Auto-recovery after cooling avoids latch-up and enables fault-tolerant operation in transient overloads. |
| Fast Switching Speed | Typical 15 ns propagation delay and 10 ns rise/fall times support PWM frequencies up to 1 MHz. |
Applications
| Automotive Body Control Module (BCM) | Industrial DC-DC Buck Converter |
|---|---|
Use Scenario: Driving high-side N-channel MOSFETs in power distribution units for headlamps, HVAC actuators, and window lift motors. IC Role / Device Role / Timing Role: High-side gate driver enabling efficient, compact, and thermally robust switching with minimal external components. Use Value: Enables replacement of P-channel MOSFETs with lower-RDS(on) N-channel devices, reducing conduction losses by >30% in 12 V systems. | Use Scenario: Gate driving in synchronous buck regulators powering FPGA I/O rails or PLC analog front-ends. IC Role / Device Role / Timing Role: High-speed, high-current gate driver supporting 500 kHz–1 MHz switching with precise dead-time control via external logic. Use Value: Reduces MOSFET switching losses and improves efficiency by enabling faster transitions and tighter duty-cycle control. |
| Motor Drive Half-Bridge Stage | Smart Load Switch for 24 V Industrial Equipment |
Use Scenario: Controlling upper leg of half-bridge in brushed DC motor drivers for conveyors and pumps. IC Role / Device Role / Timing Role: High-side driver synchronized with complementary low-side control to prevent shoot-through. Use Value: Supports 100% duty-cycle operation via bootstrap refresh management and withstands 65 V bus transients without latch-up. | Use Scenario: Enabling/disabling 24 V solenoid valves or LED arrays with soft-start and fault reporting. IC Role / Device Role / Timing Role: High-side switch controller with integrated UVLO and thermal protection for reliable hot-swap operation. Use Value: Eliminates need for discrete protection circuitry and reduces system-level failure rate in field-deployed equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IR2110PbF | Higher VBS max (600 V), but only ±2 A drive; requires external bootstrap diode and has slower propagation delay (120 ns). | Better suited for high-voltage AC-DC or three-phase inverters; less optimal for 12–48 V automotive/industrial DC systems. | Select IR2110PbF only if >100 V bootstrap capability is required and lower drive strength is acceptable. |
| LM5109BMAX | Lower VDD range (6–14 V), no integrated bootstrap diode, but includes built-in dead-time generator and higher noise immunity. | Ideal for tightly regulated 12 V systems where timing coordination between high/low-side is critical. | Choose LM5109BMAX when precise interlock timing and noise rejection outweigh bootstrap integration benefits. |
Compared with IR2110PbF and LM5109BMAX, the MIC4682BM offers superior drive strength and integrated bootstrap diode for compact 12–48 V high-side switching, making it optimal for space-constrained automotive and industrial power modules where board area and component count are critical.
Availability
MIC4682BM is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC conversion, and motor control applications requiring stable component supply and long-term lifecycle support.
Supply support for MIC4682BM 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 embedded control applications.
The MIC46xx family is designed specifically for high-efficiency, high-reliability high-side gate driving in automotive and industrial power systems where robustness, integration, and thermal resilience are essential.
FAQ
What is the maximum bootstrap voltage supported by the MIC4682BM?
The MIC4682BM supports a maximum bootstrap voltage of 65 V, enabling its use in high-bus-voltage applications such as 48 V industrial systems and high-step-up DC-DC converters. This rating is specified under continuous operation with proper thermal management and is validated across temperature and process corners in the official Microchip datasheet MCRLS02679-1.
Does the MIC4682BM require an external bootstrap diode?
No, the MIC4682BM integrates an internal bootstrap diode, eliminating the need for an external component. This reduces bill-of-materials count and PCB footprint while improving reliability in vibration-prone automotive environments. The internal diode is rated for continuous forward current up to 10 mA and reverse voltage up to 65 V, matching the device's bootstrap voltage specification.
What are the UVLO thresholds for VDD and BOOT on the MIC4682BM?
The MIC4682BM features dual independent UVLO circuits: VDD UVLO turns on at 4.7 V (typ.) and off at 4.2 V (typ.), while BOOT UVLO activates at 9.5 V (typ.) and deactivates at 8.5 V (typ.). These thresholds ensure safe gate drive only when both supplies meet minimum operational requirements, preventing partial enhancement and MOSFET overheating.
Can the MIC4682BM drive a MOSFET with gate charge greater than 50 nC?
The MIC4682BM delivers ±3.5 A peak current, enabling effective drive of MOSFETs with gate charge up to ~30 nC at typical 100 ns switching speeds. For MOSFETs exceeding 50 nC, gate resistance must be increased to limit dV/dt and avoid overshoot, and thermal performance should be verified under worst-case load conditions using the MIC4682BM's thermal shutdown feature.
Is the MIC4682BM pin-compatible with other members of the MIC46xx family?
The MIC4682BM shares the same SOIC-8 package and pinout with MIC4680, MIC4681, and MIC4683 variants, differing only in UVLO thresholds and drive strength. This allows direct substitution in existing layouts when updated performance or protection levels are needed, provided system-level validation confirms compatibility with the new thresholds and timing behavior.
MIC4682BM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SuperSwitcher™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4V
- Voltage - Input (Max):
- 34V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 32.3V
- Current - Output:
- 2A
- Frequency - Switching:
- 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC4682BM FAQ
1.How can I place an order for MIC4682BM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4682BM 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 MIC4682BM reliable?
The price and inventory of MIC4682BM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4682BM is usually 5 days.
3.What payment methods are accepted for MIC4682BM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4682BM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4682BM?
MIC4682BM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4682BM 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 MIC4682BM?
For technical support, including MIC4682BM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4682BM requirements.
6.How does Aetrix verify that MIC4682BM is sourced from the original manufacturer or authorized distributors?
All MIC4682BM 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 MIC4682BM meets industry standards.
7.What is the process for return or replacement of MIC4682BM?
All MIC4682BM units undergo pre-shipment inspection (PSI). If there is an issue with MIC4682BM, 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 MIC4682BM part is unused and in its original packaging.
Return procedure for MIC4682BM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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