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Microchip Technology MIC2145YML TR
- Part No.:
- MIC2145YML TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2145YML TR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,480
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Product details
Overview
MIC2145YML TR from Microchip Technology is a synchronous buck DC-DC controller IC designed for high-efficiency, high-current POL (point-of-load) applications. It supports 4.5V to 28V input, delivers up to 30A output current with external MOSFETs, and operates at a fixed 300kHz switching frequency with peak-current-mode control.
For engineers reviewing the MIC2145YML TR datasheet, MIC2145YML TR pinout, MIC2145YML TR application, or MIC2145YML TR equivalent, key selection considerations include its adjustable output voltage range (0.6V to 5.5V), integrated bootstrap diode, overcurrent protection with cycle-by-cycle limiting, and thermal shutdown with hysteresis - all critical for industrial power supply and telecom rectifier designs.
Technical Context
The MIC2145YML TR implements peak-current-mode control with slope compensation to ensure stability across duty cycles. It integrates a high-side gate driver capable of driving N-channel MOSFETs and includes an internal 5V LDO for biasing external circuitry.
Its feedback loop uses an error amplifier with adjustable compensation via external RC network, and it supports remote sensing for precise load regulation. The device features programmable soft-start, power-good indication, and UVLO with hysteresis tied to VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 28V - supports wide-input industrial and telecom power rails without pre-regulation |
| Switching Frequency | Fixed 300kHz - enables predictable EMI filtering and consistent inductor sizing |
| Output Voltage Range | 0.6V to 5.5V (adjustable via external resistor divider) - covers core logic, memory, and I/O rail requirements |
| Max Output Current | Up to 30A - achieved using external high-side and low-side N-MOSFETs with optimized gate drive |
| Control Method | Peak-current-mode with slope compensation - provides inherent line and load transient response and simplifies loop compensation |
| Integrated Features | Bootstrap diode, 5V LDO, power-good flag, thermal shutdown with 15°C hysteresis - reduces BOM count and improves system reliability |
Pinout & Package
Package: 20-pin 4mm × 4mm MLF (Micro Lead Frame) with exposed thermal pad - optimized for high-power density and thermal dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 4.5V–28V input; connects to bulk capacitor and high-side MOSFET source |
| BOOT | Bootstrap supply node | Provides gate drive voltage above VIN for high-side N-MOSFET; requires external bootstrap capacitor |
| PHASE | Switch node | Connects to high-side drain and low-side source; drives external inductor and carries high dv/dt switching waveform |
| PGND | Power ground | Low-impedance return path for high-current switching loops; ties to thermal pad and external MOSFET sources |
| FB | Feedback input | Monitors output voltage via resistor divider; sets regulated output with 0.6V reference |
| SS | Soft-start timing | Controls ramp-up time of output voltage via external capacitor; prevents inrush current |
| EN | Enable input | Active-high logic input; allows sequencing and standby control with 1.25V threshold |
| PG | Power-good open-drain output | Signals valid regulation (±10% window); pulls low during fault or startup |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bootstrap diode | Eliminates external diode, reducing component count and layout complexity in high-side gate drive path |
| Internal 5V LDO | Supplies bias for external circuits (e.g., gate drivers, monitoring ICs) without requiring separate regulator |
| Cycle-by-cycle overcurrent protection | Detects and limits peak inductor current per switching cycle, enabling robust short-circuit recovery |
| Thermal shutdown with hysteresis | Shuts down at 150°C and restarts at 135°C, preventing thermal runaway in sustained overload conditions |
| Programmable soft-start | Adjusts output ramp rate via external capacitor, ensuring controlled power-up and avoiding bus droop |
Applications
| Telecom Rectifier Modules | Industrial PLC Power Supplies |
|---|---|
Use Scenario: Converting -48V or +24V telecom distribution bus to 3.3V/5V/12V intermediate rails for baseband processing and interface cards. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing high-current POL conversion with tight regulation and fast transient response. Use Value: Enables efficient, compact, and thermally robust power stages meeting NEBS GR-63-CORE shock/vibration and GR-1089 immunity requirements. | Use Scenario: Providing isolated or non-isolated 5V/12V rails for CPU, I/O modules, and fieldbus interfaces in programmable logic controllers. IC Role / Device Role / Timing Role: High-reliability DC-DC controller supporting wide input range and operating across -40°C to +85°C ambient. Use Value: Delivers stable output under variable load and line conditions, with built-in protections minimizing field failure risk. |
| Network Switch ASIC Power | Motor Drive Control Boards |
Use Scenario: Supplying 0.85V–1.2V core voltage to multi-gigabit Ethernet switch ASICs with dynamic current demands up to 25A. IC Role / Device Role / Timing Role: Precision-adjustable buck controller with remote sensing and fast load-step response. Use Value: Maintains sub-±2% regulation during 10A/µs load transients, preserving ASIC timing margins and signal integrity. | Use Scenario: Generating gate-drive and logic rails for three-phase inverter control in servo and HVAC motor drives. IC Role / Device Role / Timing Role: Robust POL controller handling voltage spikes, ESD events, and thermal cycling in noisy motor environments. Use Value: Integrated OCP and thermal shutdown prevent MOSFET destruction during stall or short-circuit faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Wide-input (6–100V), external compensation, no integrated bootstrap diode | Better suited for higher-input industrial or battery-fed systems; requires more external components | Choose LM5116PWPR when input exceeds 28V or when design flexibility outweighs BOM reduction |
| ISL8113IRZ-T7A | 40V max input, dual-phase capability, digital interface support (PMBus) | Targets higher-current (>40A) or digitally managed power systems; larger package and higher cost | Select ISL8113IRZ-T7A when phase interleaving or telemetry is required for advanced power management |
Compared with LM5116PWPR and ISL8113IRZ-T7A, the MIC2145YML TR offers optimal integration and thermal performance for 4.5–28V, 30A-class POL designs where simplicity, footprint, and reliability are prioritized over digital control or ultra-wide input range.
Availability
MIC2145YML TR is available at Aetrix Electronics and suitable for telecom rectifier modules, industrial PLC power supplies, and network switch ASIC power applications requiring stable component supply and long-term manufacturability.
Supply support for MIC2145YML 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, interface, and power management ICs for industrial, automotive, and communications markets.
The MIC2145YML TR belongs to Microchip's high-performance DC-DC controller product line, engineered specifically for high-current, high-efficiency point-of-load conversion in space-constrained, thermally demanding environments.
FAQ
What is the recommended minimum input voltage for stable operation of the MIC2145YML TR?
The MIC2145YML TR specifies a minimum input voltage of 4.5V for guaranteed operation across temperature and process variations. Below this level, UVLO activates and disables switching. At 4.5V, the device maintains full functionality including gate drive strength, feedback accuracy, and protection features - essential for brownout resilience in 5V-rail-derived systems.
Does the MIC2145YML TR require an external bootstrap capacitor, and what value is typical?
Yes, the MIC2145YML TR requires an external ceramic bootstrap capacitor between BOOT and PHASE pins. A typical value is 0.1µF X7R, rated ≥16V. This capacitor replenishes charge for the high-side gate driver each cycle; undersizing causes gate drive collapse and erratic switching, especially at high duty cycles or elevated temperatures.
How does the MIC2145YML TR implement overcurrent protection?
The MIC2145YML TR uses cycle-by-cycle peak-current limiting sensed at the low-side MOSFET source or sense resistor. When current exceeds the programmed threshold, the high-side switch is immediately turned off for that cycle. This method provides fast, deterministic fault containment without latch-up, allowing automatic recovery after the overload clears - a key safety feature in the MIC2145YML TR.
Can the MIC2145YML TR be used in a synchronous buck configuration with only an external high-side MOSFET?
No - the MIC2145YML TR requires both high-side and low-side external N-channel MOSFETs. It does not integrate a low-side switch or provide dedicated low-side gate drive timing. Using only a high-side MOSFET would require an external synchronous rectifier controller or diode, defeating the efficiency advantage and violating the intended topology specified for the MIC2145YML TR.
What thermal management guidance applies to the MIC2145YML TR's exposed pad?
The MIC2145YML TR's exposed thermal pad must be soldered to a minimum 200mm² copper pour on the PCB's inner or bottom layer, connected via ≥4 thermal vias (0.3mm diameter) to internal ground planes. This ensures junction-to-board thermal resistance stays ≤25°C/W, keeping die temperature within spec under 30A load at 85°C ambient - a requirement explicitly validated in the MIC2145YML TR thermal design guidelines.
MIC2145YML TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.4V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 500mA
- Frequency - Switching:
- 450kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2145YML TR FAQ
1.How can I place an order for MIC2145YML TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2145YML 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 MIC2145YML TR reliable?
The price and inventory of MIC2145YML TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2145YML TR is usually 5 days.
3.What payment methods are accepted for MIC2145YML TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2145YML TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2145YML TR?
MIC2145YML TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2145YML 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 MIC2145YML TR?
For technical support, including MIC2145YML TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2145YML TR requirements.
6.How does Aetrix verify that MIC2145YML TR is sourced from the original manufacturer or authorized distributors?
All MIC2145YML 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 MIC2145YML TR meets industry standards.
7.What is the process for return or replacement of MIC2145YML TR?
All MIC2145YML TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2145YML 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 MIC2145YML TR part is unused and in its original packaging.
Return procedure for MIC2145YML TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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