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Microchip Technology MIC28513-1YFL-T5
- Part No.:
- MIC28513-1YFL-T5
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MIC28513-1YFL-T5.pdf
- Description:
- IC REG BUCK ADJ 4A 24FCQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
MIC28513-1YFL-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 4.6V–45V input range, adjustable output down to 0.8V (±1% accuracy), and programmable 200–680 kHz switching frequency - used in industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MIC28513-1YFL-T5 datasheet, MIC28513-1YFL-T5 pinout, MIC28513-1YFL-T5 application, or MIC28513-1YFL-T5 equivalent, this page delivers verified technical context, HyperLight Load® architecture benefits, thermal shutdown behavior, FQFN-24 package layout, and real-world alternative selection guidance for high-VIN buck converter design.
Technical Context
The MIC28513-1YFL-T5 implements adaptive on-time control with fixed tON estimation and feedback-dependent off-time, enabling constant-frequency operation in CCM and reduced frequency in DCM. Its HyperLight Load® architecture forces discontinuous conduction mode at light loads to minimize quiescent current (0.4 mA typical) and optimize efficiency below 100 mA.
Current limiting uses internal low-side RDS(ON) sensing with programmable threshold via external resistor on ILIM pin; short-circuit protection employs foldback "hiccup" mode with recovery delay. The built-in 5V VDD LDO supports single-supply operation, and PGOOD asserts when FB exceeds 90% of 0.8V reference.
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 continuous - enables single-chip 5V/4A or 3.3V/4A point-of-load regulation |
| Feedback Reference | 0.8V ±1% at 25°C - sets output voltage via external resistor divider with tight regulation tolerance |
| Switching Frequency | 200 kHz to 680 kHz, programmable via FREQ pin - balances EMI, efficiency, and inductor size |
| Thermal Shutdown | 160°C junction temperature - protects against sustained overload or poor heatsinking |
| Soft-Start Time | Fixed 5 ms - limits inrush current during startup and prevents output overshoot |
| Junction Temp Range | –40°C to +125°C - qualified for harsh industrial and base station environments |
| Package | 24-pin 3 mm × 4 mm FQFN with exposed thermal pad (FL) - enables high-power density with low θJA = 30°C/W |
Pinout & Package
24-pin 3 mm × 4 mm thermally enhanced FQFN (FL) package with 5 exposed PGND pads (pins 10, 11, 22, 23, 26) and 1 ePad PVIN (pin 25) for optimal thermal and power delivery performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DL) | Low-side gate drive | Internal connection to low-side MOSFET gate; must remain unconnected or floating |
| 2, 10, 11, 22, 23, 26 (PGND) | Power ground | Return path for low-side MOSFET and power stage; requires low-impedance PCB copper pour |
| 3 (DH) | High-side gate drive | Internal connection to high-side MOSFET gate; must remain unconnected or floating |
| 4, 7, 8, 9, 25 (PVIN) | Power input voltage | Supplies internal power switches; all pins must be tied together and locally bypassed |
| 5 (LX) | Switch node return | Connection point for bootstrap capacitor negative terminal and SW node routing |
| 6 (BST) | Bootstrap supply | Provides gate drive voltage for high-side MOSFET via 0.1 µF capacitor to LX |
| 12, 21, 27 (SW) | Switch node output | Internal power switch outputs; tied together and connected to inductor input |
| 13 (AGND) | Analog ground | Reference for FB, EN, PGOOD; must be separated from PGND to avoid noise coupling |
| 14 (FB) | Feedback input | Senses output voltage via resistor divider; regulates output to 0.8V reference |
| 15 (PGOOD) | Power good open-drain | Asserts high when FB > 90% of 0.8V; requires external pull-up for system sequencing |
| 16 (EN) | Enable input | Logic-high (>1.8V) enables regulation; logic-low (<0.6V) disables with <10 µA shutdown current |
| 17 (VIN) | LDO input supply | Primary supply for internal circuitry; accepts full 4.6V–45V input range |
| 18 (ILIM) | Current limit programming | Connects to SW node via resistor to set overcurrent threshold using low-side RDS(ON) |
| 19 (VDD) | Internal 5V regulator output | Supplies control logic; requires 1 µF ceramic bypass; ties to VIN if VIN < 5.5V |
| 20 (PVDD) | Low-side driver supply | Can be tied to VDD; requires 1 µF ceramic cap to PGND for stable gate drive |
| 24 (FREQ) | Frequency adjust | Resistor divider from VIN sets switching frequency; direct tie to VIN yields 680 kHz |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® architecture | Enables discontinuous conduction mode at light loads, reducing quiescent current to 0.4 mA and improving efficiency below 100 mA |
| Integrated dual N-MOSFETs | Eliminates external power switches - 37 mΩ high-side and 20 mΩ low-side RDS(ON) reduce conduction loss and BOM count |
| Programmable current limit | External resistor on ILIM pin sets precise overcurrent threshold based on low-side RDS(ON), supporting custom protection levels |
| Fixed 5 ms soft-start | Digital ramp of 0.8V reference prevents output overshoot and limits inrush into large output capacitors |
| Built-in 5V VDD LDO | Allows single-supply operation from 4.6V–45V input; eliminates need for external bias rail in most designs |
| Thermal shutdown with hysteresis | Shuts down at 160°C junction temperature and re-enables only after 15°C cooldown, preventing thermal cycling damage |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
Use Scenario: Central 24V or 48V backplane powering multiple 5V/3.3V sub-systems in PLCs and motor drives. IC Role / Device Role / Timing Role: Primary synchronous buck regulator converting high-VIN to stable low-VOUT with fast transient response. Use Value: HyperLight Load® maintains >85% efficiency at 50 mA load, reducing heat buildup in enclosed cabinets. |
Use Scenario: Local regulation on dense PCBs where space constraints prohibit multi-stage conversion. IC Role / Device Role / Timing Role: Point-of-load (POL) converter delivering 4A at 3.3V directly from 12V or 24V intermediate bus. Use Value: Integrated MOSFETs and FQFN-24 package enable <120 mm² solution size with minimal external components. |
| Base Station Power Supplies | Wall Transformer Regulation |
Use Scenario: Powering RF transceivers and digital signal processors in 4G/5G remote radio units. IC Role / Device Role / Timing Role: High-reliability buck regulator operating from –40°C to +125°C ambient with thermal derating support. Use Value: 125°C max junction rating and 30°C/W θJA allow operation at full 4A load in sealed enclosures without forced air. |
Use Scenario: Replacing linear regulators in compact AC/DC adapters requiring 5V/3A output with low no-load consumption. IC Role / Device Role / Timing Role: Efficient step-down regulator accepting wide-input rectified DC (e.g., 9–45V) from bridge rectifier. Use Value: 0.4 mA quiescent current and hiccup-mode short-circuit protection meet Level VI no-load power requirements. |
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, 17V VIN UVLO, no integrated VDD LDO | Requires external 5V bias; lower current rating limits use to ≤2A POL | Select when cost-sensitive ≤2A designs prioritize footprint over integration |
| LM5164QPWPRQ1 | 65V max input, 1A output, external MOSFETs, 100 ns min off-time | Needs discrete high/low-side FETs and gate drivers; suited for ultra-high-VIN or high-temp automotive | Select when input exceeds 45V or AEC-Q100 qualification is mandatory |
Compared with MPQ4420AGL-A-Z and LM5164QPWPRQ1, the MIC28513-1YFL-T5 uniquely combines 45V input, 4A output, integrated 5V LDO, and HyperLight Load® in a 3×4 mm FQFN - making it optimal for space-constrained industrial 4A POLs where single-supply simplicity and light-load efficiency are critical.
Availability
MIC28513-1YFL-T5 is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and base station power supplies requiring stable component supply across extended temperature and long production lifecycles.
Supply support for MIC28513-1YFL-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 Inc. is a leading provider of microcontrollers, analog devices, 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 optimized for industrial and telecom infrastructure, emphasizing wide input range, integrated power stages, and adaptive control for robust performance under dynamic load and thermal conditions.
FAQ
What is the maximum output current capability of the MIC28513-1YFL-T5?
The MIC28513-1YFL-T5 delivers up to 4A continuous output current when properly heatsinked and operated within its 4.6V–45V input range and –40°C to +125°C junction temperature limits. Derating applies above 85°C ambient per Figure 2-20 through 2-22 in the datasheet, and actual achievable current depends on PCB layout, airflow, and output voltage setting.
How does the HyperLight Load® architecture improve efficiency in the MIC28513-1YFL-T5?
The HyperLight Load® architecture in the MIC28513-1YFL-T5 forces discontinuous conduction mode (DCM) at light loads, reducing quiescent supply current to 0.4 mA typical and minimizing switching losses. This enables >85% efficiency at 50 mA output - critical for always-on industrial subsystems where standby power matters.
Can the MIC28513-1YFL-T5 operate with an input voltage below 5.5V?
Yes - the MIC28513-1YFL-T5 supports input voltages as low as 4.6V. When VIN drops below 5.5V, the internal 5V VDD LDO enters dropout mode; the datasheet recommends tying VDD directly to VIN in such cases to ensure stable bias for control circuitry and gate drivers.
What is the purpose of the ILIM pin on the MIC28513-1YFL-T5?
The ILIM pin on the MIC28513-1YFL-T5 enables precise programmable overcurrent protection by connecting an external resistor between ILIM and the SW node. It senses voltage drop across the internal low-side MOSFET's RDS(ON) to trigger foldback hiccup-mode protection before destructive current levels are reached.
Is the MIC28513-1YFL-T5 pin-compatible with the MIC28513-2 variant?
No - while both MIC28513-1YFL-T5 and MIC28513-2 share identical pinout and package, they implement different control architectures: MIC28513-1 uses HyperLight Load® for DCM optimization, whereas MIC28513-2 uses Hyper Speed Control® for ultra-fast transient response. Functionally interchangeable only if architecture-specific behavior is acceptable.
MIC28513-1YFL-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- 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:
- 340kHz ~ 680kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-FCQFN (3x4)
MIC28513-1YFL-T5 FAQ
1.How can I place an order for MIC28513-1YFL-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC28513-1YFL-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 MIC28513-1YFL-T5 reliable?
The price and inventory of MIC28513-1YFL-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC28513-1YFL-T5 is usually 5 days.
3.What payment methods are accepted for MIC28513-1YFL-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC28513-1YFL-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC28513-1YFL-T5?
MIC28513-1YFL-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC28513-1YFL-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 MIC28513-1YFL-T5?
For technical support, including MIC28513-1YFL-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC28513-1YFL-T5 requirements.
6.How does Aetrix verify that MIC28513-1YFL-T5 is sourced from the original manufacturer or authorized distributors?
All MIC28513-1YFL-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 MIC28513-1YFL-T5 meets industry standards.
7.What is the process for return or replacement of MIC28513-1YFL-T5?
All MIC28513-1YFL-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC28513-1YFL-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 MIC28513-1YFL-T5 part is unused and in its original packaging.
Return procedure for MIC28513-1YFL-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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