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Microchip Technology MIC28513-2YFL-T5
- Part No.:
- MIC28513-2YFL-T5
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MIC28513-2YFL-T5.pdf
- Description:
- IC REG BUCK ADJ 4A 24FCQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC28513-2YFL-T5 from Microchip Technology is a synchronous step-down DC/DC regulator with integrated high-side and low-side N-channel MOSFETs, delivering up to 4A output current across a 4.6V–45V input range. It features HyperSpeed Control® architecture for ultra-fast transient response, adjustable 200–680 kHz switching frequency, and a fixed 5 ms soft-start-enabling robust 5V/4A regulation in industrial power supplies and base station systems.
For engineers reviewing the MIC28513-2YFL-T5 datasheet, MIC28513-2YFL-T5 pinout, MIC28513-2YFL-T5 application, or MIC28513-2YFL-T5 equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and protection behavior, and real-world design implications for high-VIN, low-VOUT buck conversion.
Technical Context
The MIC28513-2YFL-T5 implements adaptive on-time control with HyperSpeed Control® architecture, enabling constant-frequency operation in CCM while dynamically adjusting OFF-time during transients to maintain tight regulation. Its zero-current detection (ZCD) circuit monitors the low-side MOSFET's RDS(ON) voltage drop to trigger switching events without external current-sense resistors.
It integrates a 5V linear regulator (VDD) powered from VIN (4.6V–45V), supports programmable current-limit via ILIM pin with foldback "hiccup" short-circuit protection, and uses internal compensation to eliminate external loop components. The device operates from –40°C to +125°C junction temperature and includes thermal shutdown with 160°C trip and 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 45V - supports wide industrial and automotive supply rails without pre-regulation |
| Max Output Current | 4A - sustained delivery with integrated 37 mΩ high-side and 20 mΩ low-side MOSFETs |
| Feedback Reference | 0.8V ±1% at 25°C - enables precise output setting down to 0.8V with external resistor divider |
| Switching Frequency | 200 kHz to 680 kHz - programmable via FREQ pin; higher frequencies reduce inductor size, lower frequencies improve efficiency at light load |
| Soft-Start Time | Fixed 5 ms - digitally ramped reference prevents inrush current and output overshoot during startup |
| Thermal Shutdown | 160°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design |
| PGOOD Threshold | 90% of VOUT with 6% hysteresis - ensures reliable system power sequencing and fault reporting |
Pinout & Package
Package: 24-pin 3 mm × 4 mm thermally enhanced FQFN (FL) with exposed PGND ePad (pins 10, 11, 22, 23, 26) and PVIN ePad (pin 25).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DL (Pin 1) | Low-side gate driver output | Internal connection to low-side MOSFET gate; must remain unconnected or floating per datasheet |
| PGND (Pins 2,10,11,22,23,26) | Power ground return | Low-impedance return path for power stage; multiple pins and ePad minimize ground bounce and thermal resistance |
| DH (Pin 3) | High-side gate driver output | Internal connection to high-side MOSFET gate; must remain unconnected or floating |
| PVIN (Pins 4,7,8,9,25) | Main power input | Supplies high-side and low-side MOSFETs; all pins must be tied together and locally bypassed with ceramic capacitors |
| LX (Pin 5) | Bootstrap return / SW node monitor | Return path for BST capacitor; connected to SW pins; used for zero-current detection and high-side driver timing |
| BST (Pin 6) | Bootstrap supply | Charges high-side gate driver via 0.1 µF capacitor from LX; critical for proper high-side MOSFET turn-on |
| SW (Pins 12,21,27) | Switch node | Output of internal power switches; connects directly to inductor; ePad (Pin 27) enhances thermal and current handling |
| AGND (Pin 13) | Analog ground reference | Separate ground for feedback, error amplifier, and control logic; must be isolated from PGND to avoid noise coupling |
| FB (Pin 14) | Voltage feedback input | Senses output via resistor divider; regulates VOUT by comparing to 0.8V internal reference |
| PGOOD (Pin 15) | Open-drain power-good signal | Asserts high when VFB ≥ 90% of reference; requires external pull-up for system monitoring and sequencing |
| EN (Pin 16) | Enable control input | Logic-high (>1.8V) enables regulator; logic-low (<0.6V) disables with <10 µA shutdown current |
| VIN (Pin 17) | VDD LDO input | Supplies internal 5V regulator; accepts full 4.6V–45V range; decoupling capacitor required to AGND |
| ILIM (Pin 18) | Current-limit programming | Connects to SW node via resistor to set overcurrent threshold based on low-side RDS(ON) sensing |
| VDD (Pin 19) | Internal 5V supply bus | Output of integrated LDO; powers control circuitry; bypass with 1 µF capacitor to AGND |
| PVDD (Pin 20) | Low-side driver supply | Can be tied to VDD; powers low-side gate driver; decoupled with 1 µF capacitor to PGND |
| FREQ (Pin 24) | Frequency adjust input | Resistor divider from VIN sets switching frequency; direct connection to VIN yields 680 kHz |
Key Features
| Feature | Design Value |
|---|---|
| HyperSpeed Control® architecture | Enables sub-10 µs load transient recovery and reduces required output capacitance by >30% vs. conventional buck controllers |
| Integrated 5V VDD LDO | Eliminates need for external bias supply; supports single-rail operation from 4.6V input without auxiliary rail |
| Programmable current limit with hiccup mode | Prevents destructive failure during sustained short-circuit; automatically retries after safe cooldown period |
| Fixed 5 ms digital soft-start | Guarantees monotonic VOUT rise with no overshoot, even into pre-biased loads |
| Thermally enhanced 3×4 mm FQFN | θJA = 30°C/W enables 4A continuous operation with minimal heatsinking on standard 2-layer PCB |
| Internal compensation | Removes requirement for external Type-II/III compensation network, reducing BOM count and layout sensitivity |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
Use Scenario: Central 24V or 48V backplane powering multiple 5V/3.3V point-of-load rails in PLCs and motor drives. IC Role / Device Role / Timing Role: Primary synchronous buck regulator converting high-voltage distribution rail to stable 5V/4A local supply. Use Value: HyperSpeed Control® ensures fast transient response to dynamic I/O module loads, minimizing output droop without oversized bulk capacitance. |
Use Scenario: Local regulation on dense compute modules where space-constrained PCBs require compact, high-efficiency DC/DC conversion. IC Role / Device Role / Timing Role: Integrated buck converter providing regulated 5V from wide-input industrial supply, eliminating discrete MOSFETs and drivers. Use Value: 3×4 mm FQFN package with ePad thermal path enables 4A delivery in <12 mm² footprint, supporting high-density board layouts. |
| Base Station Power Supplies | Wall Transformer Regulation |
Use Scenario: Intermediate 12V rail generation in 5G remote radio units (RRUs) operating in outdoor enclosures with wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability buck regulator maintaining 5V/4A under –40°C to +125°C junction conditions with built-in thermal shutdown. Use Value: Guaranteed ±1% reference accuracy and 160°C thermal cutoff ensure stable operation and graceful fault handling in uncooled telecom environments. |
Use Scenario: Universal-input AC/DC adapter secondary-side regulation delivering 5V/4A to USB-C PD devices or embedded systems. IC Role / Device Role / Timing Role: Synchronous buck controller accepting rectified 12–45V DC input from primary-side flyback or LLC stage. Use Value: 4.6V minimum input allows operation down to brownout conditions; PGOOD signal enables accurate adapter status reporting to host system. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGL-A-Z | 40V max input, 2A output, fixed 500 kHz frequency, no programmable current limit | Lower current rating limits use to ≤2A loads; lacks hiccup-mode short-circuit protection | Select when cost-sensitive 2A designs prioritize small footprint over programmability and fault robustness |
| LM5164QDGQRQ1 | 65V max input, 1A output, external MOSFETs required, adjustable frequency, no integrated VDD LDO | Requires external high-side/low-side FETs and bias supply; suited for ultra-high-VIN but not plug-in replacement | Select when input exceeds 45V or when design requires >125°C ambient operation beyond MIC28513-2YFL-T5's rating |
Compared with MPQ4420AGL-A-Z and LM5164QDGQRQ1, the MIC28513-2YFL-T5 uniquely combines 4A capability, integrated 5V LDO, programmable current limit, and HyperSpeed Control® in a thermally optimized 3×4 mm package-making it optimal for space-constrained, high-transient industrial and telecom 5V/4A rails.
Availability
MIC28513-2YFL-T5 is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and base station power supplies requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC28513-2YFL-T5 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, FPGA, and power management ICs, serving industrial, automotive, and communications markets with high-reliability semiconductor solutions.
The MIC28513 product line delivers high-VIN synchronous buck regulators with integrated MOSFETs and advanced control architectures-designed specifically for demanding industrial and telecom power conversion where efficiency, transient response, and thermal resilience are critical.
FAQ
What distinguishes MIC28513-2YFL-T5 from the MIC28513-1 variant?
The MIC28513-2YFL-T5 implements HyperSpeed Control® architecture for ultra-fast transient response and reduced output capacitance requirements, whereas the MIC28513-1 uses HyperLight Load® for superior light-load efficiency. The MIC28513-2YFL-T5 also exhibits higher quiescent current (0.7–1.5 mA vs. 0.4–0.75 mA) and different load transient waveforms per datasheet Figures 2-46 and 2-44. Both share identical pinout, package, and core protection features.
Does MIC28513-2YFL-T5 require external compensation components?
No, the MIC28513-2YFL-T5 uses internal compensation, eliminating the need for external Type-II or Type-III compensation networks. This simplifies design, reduces BOM count, and improves layout robustness-particularly beneficial for high-density industrial PCBs where stability margins are sensitive to parasitic effects.
How is current limit programmed on MIC28513-2YFL-T5?
Current limit is programmed by connecting a resistor between the ILIM pin (Pin 18) and the SW node (Pins 12/21/27). The value is calculated using Equation 4-3 in the datasheet, factoring in the low-side MOSFET's RDS(ON) (20 mΩ typical), temperature derating, and desired peak current threshold. A small capacitor from ILIM to PGND filters switching noise for accurate sensing.
Can MIC28513-2YFL-T5 operate with input voltage below 5.5V?
Yes, but with configuration changes: when VIN is below 5.5V, the internal VDD LDO cannot regulate properly, so VDD (Pin 19) must be externally tied to VIN. The datasheet specifies this bypass condition explicitly, and the device maintains full functionality-including enable, PGOOD, and current limiting-as long as the 4.6V minimum input is met.
What thermal performance can be expected from MIC28513-2YFL-T5 in a standard 2-layer PCB layout?
With its 3 mm × 4 mm FQFN package and exposed PGND ePad, the MIC28513-2YFL-T5 achieves θJA = 30°C/W on a standard 2-layer board with 1 oz copper and moderate copper pour. At 4A output and 12V input, typical junction temperature rise is ~60°C above ambient-well within the –40°C to +125°C operating range, provided adequate airflow or modest heatsinking is applied.
MIC28513-2YFL-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Hyper Speed Control®
- Package/Case:
- 24-VFQFN Exposed Pad
- 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):
- 4.6V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 38.25V
- Current - Output:
- 4A
- Frequency - Switching:
- 200kHz ~ 680kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-FCQFN (3x4)
MIC28513-2YFL-T5 FAQ
1.How can I place an order for MIC28513-2YFL-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC28513-2YFL-T5 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 MIC28513-2YFL-T5 reliable?
The price and inventory of MIC28513-2YFL-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC28513-2YFL-T5 is usually 5 days.
3.What payment methods are accepted for MIC28513-2YFL-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC28513-2YFL-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC28513-2YFL-T5?
MIC28513-2YFL-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC28513-2YFL-T5 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 MIC28513-2YFL-T5?
For technical support, including MIC28513-2YFL-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC28513-2YFL-T5 requirements.
6.How does Aetrix verify that MIC28513-2YFL-T5 is sourced from the original manufacturer or authorized distributors?
All MIC28513-2YFL-T5 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 MIC28513-2YFL-T5 meets industry standards.
7.What is the process for return or replacement of MIC28513-2YFL-T5?
All MIC28513-2YFL-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC28513-2YFL-T5, 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 MIC28513-2YFL-T5 part is unused and in its original packaging.
Return procedure for MIC28513-2YFL-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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