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Microchip Technology MIC28512-2YFL-T5
- Part No.:
- MIC28512-2YFL-T5
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MIC28512-2YFL-T5.pdf
- Description:
- IC REG BUCK ADJ 2A 24FCQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,063
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Product details
Overview
MIC28512-2YFL-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 2A output current across a 4.6V–70V input range. It features HyperSpeed Control® architecture, 200–680 kHz programmable switching frequency, and ±1% output voltage accuracy down to 0.8V - optimized for industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MIC28512-2YFL-T5 datasheet, MIC28512-2YFL-T5 pinout, MIC28512-2YFL-T5 application, or MIC28512-2YFL-T5 equivalent, key selection criteria include its wide VIN range, internal 5V LDO, PGOOD output, adjustable current-limit via ILIM pin, and thermally enhanced 24-pin 3 mm × 4 mm FCQFN package rated for –40°C to +125°C junction operation.
Technical Context
The MIC28512-2YFL-T5 implements adaptive on-time control with fixed tON estimation, enabling constant-frequency operation in CCM while dynamically adjusting OFF-time during transients for ultra-fast response. Its HyperSpeed Control® architecture specifically targets high-VIN/low-VOUT conversion (e.g., 48V-to-5V), minimizing output capacitance requirements and improving light-load efficiency without slope compensation.
Protection includes foldback current-limit with hiccup-mode short-circuit response, internal soft-start (5 ms fixed), thermal shutdown at 160°C, UVLO on VDD (4.2V rising threshold), and precise enable logic with 200 mV hysteresis. The device integrates a 5V linear regulator (VDD) powered from VIN and supports external bootstrap capacitor biasing via BST/LX pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 70V - enables direct use in 24V/48V industrial and automotive supply rails without pre-regulation. |
| Output Current | Up to 2A continuous - sufficient for powering FPGA I/O banks, microcontroller cores, or isolated gate drivers. |
| Feedback Reference | 0.8V ±1% at 25°C - allows precise output setting down to 0.8V using standard resistor dividers; ±2% over full temperature range. |
| Switching Frequency | 200 kHz to 680 kHz, programmable via FREQ pin - balances EMI, inductor size, and efficiency across load conditions. |
| Integrated MOSFETs | High-side RDS(on) = 77 mΩ, low-side RDS(on) = 43 mΩ - eliminates external power switches and reduces BOM count and layout complexity. |
| Thermal Performance | θJA = 30°C/W in 3 mm × 4 mm FCQFN - supports 2A operation up to +85°C ambient without forced airflow when properly mounted. |
| Protection Features | Programmable current-limit, hiccup-mode short-circuit response, thermal shutdown (160°C), and PGOOD open-drain flag - ensures robust field reliability under fault conditions. |
Pinout & Package
Package: 24-pin 3 mm × 4 mm FCQFN (FL) with exposed thermal pad (ePad on pins 25/PVIN, 26/PGND, 27/SW); RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DL) | Low-side gate drive | Internal connection to low-side MOSFET gate; must remain unconnected - not user-accessible for external drive. |
| 2, 10, 11, 22, 23, 26 (PGND) | Power ground | Return path for low-side MOSFET and power stage; multiple pins reduce impedance and improve thermal dissipation. |
| 3 (DH) | High-side gate drive | Internal connection to high-side MOSFET gate; must remain unconnected - no external gate control. |
| 4, 7, 8, 9, 25 (PVIN) | Power input voltage | Main high-voltage input supply path; all pins tied together and bypassed locally with ceramic capacitors. |
| 5 (LX) | Bootstrap return / switch node reference | Connection point for bootstrap capacitor negative terminal; also tied to SW pins for zero-current detection. |
| 6 (BST) | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF capacitor to LX with optional series resistor. |
| 12, 21, 27 (SW) | Switch node | Output of internal power stage; connects directly to inductor; multiple pins lower parasitic inductance and improve thermal spreading. |
| 13 (AGND) | Analog ground | Separate ground return for feedback, error amplifier, and control logic - must be isolated from PGND to avoid noise coupling. |
| 14 (FB) | Feedback input | Senses output voltage via resistor divider; regulates output by maintaining 0.8V at this pin. |
| 15 (PGOOD) | Power good indicator | Open-drain output asserting high when FB ≥ 90% of reference (e.g., ≥0.72V for 0.8V ref); requires external pull-up. |
| 16 (EN) | Enable input | Logic-high enable with 1.8V threshold and 200 mV hysteresis; supports accurate UVLO implementation. |
| 17 (VIN) | LDO input supply | Primary power input for internal circuitry; same 4.6V–70V range as PVIN; requires local 1 µF AGND decoupling. |
| 18 (ILIM) | Current-limit programming | Connects to SW node via external resistor to set peak current limit threshold; enables precise overcurrent protection tuning. |
| 19 (VDD) | Internal 5V regulator output | Supplies internal logic and analog blocks; requires 1 µF bypass capacitor; ties to VIN if VIN < 5.5V. |
| 20 (PVDD) | Low-side driver supply | 5V supply for low-side gate driver; typically tied to VDD; requires 1 µF PGND decoupling. |
| 24 (FREQ) | Switching frequency adjust | Resistor divider from VIN sets frequency between 200 kHz and 680 kHz; direct tie to VIN selects max 680 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| HyperSpeed Control® architecture | Enables ultra-fast transient response (<40 μs recovery from 0A→2A) and stable operation at high VIN/low VOUT ratios without external compensation. |
| Integrated 5V linear regulator (VDD) | Eliminates need for external bias supply; powers internal logic and analog circuits from VIN, supporting single-supply system design. |
| Programmable current-limit with hiccup mode | Prevents thermal runaway during sustained overload by cycling ON/OFF until fault clears - reduces average power dissipation vs. latch-off. |
| Fixed 5 ms soft-start | Controls inrush current during startup, preventing input rail sag and reducing stress on input capacitors and upstream converters. |
| Thermally enhanced FCQFN package | 3 mm × 4 mm footprint with ePad delivers θJA = 30°C/W - enables compact, high-power-density designs without heatsinks at ≤2A loads. |
| –40°C to +125°C junction rating | Qualified for harsh environments including industrial controls, base station power, and transportation electronics with extended thermal margins. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
|
Use Scenario: Local 5V/3.3V regulation on PLC backplanes or motor drive control boards fed from 24V or 48V DC bus. IC Role / Device Role / Timing Role: Primary synchronous buck converter providing clean, regulated low-voltage rails for microcontrollers and sensors. Use Value: Wide 4.6V–70V input accommodates bus voltage fluctuations; integrated MOSFETs reduce component count and PCB area by >30% vs. controller+external FET solution. |
Use Scenario: Point-of-load (POL) conversion on high-density server blades where space and thermal management are critical. IC Role / Device Role / Timing Role: High-efficiency POL regulator delivering up to 2A at 1.2V or 1.8V from intermediate 12V rail. Use Value: HyperSpeed Control® enables fast load-step response (<40 μs) essential for CPU/GPU core power; 3×4 mm FCQFN minimizes board footprint. |
| Base Station Power Supplies | Wall Transformer Regulation |
|
Use Scenario: Secondary-side regulation in telecom rectifiers converting –48V DC to +5V/+3.3V for RF front-end ICs and digital signal processors. IC Role / Device Role / Timing Role: Isolated secondary-side synchronous buck regulator operating from derived 12V or 24V intermediate bus. Use Value: 70V absolute maximum input withstands voltage spikes on telecom buses; PGOOD output enables system-level power sequencing and fault reporting. |
Use Scenario: Compact AC/DC adapter replacement delivering regulated 5V/2A output from universal 85–264V AC input (with external flyback front-end). IC Role / Device Role / Timing Role: Post-regulator ensuring tight output tolerance and low ripple despite varying line/load conditions. Use Value: ±1% reference accuracy and programmable current limit ensure compliance with USB PD and legacy adapter standards; 5 ms soft-start prevents tripping of upstream GFCI outlets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QPWPRQ1 | 4.5V–65V input, 1A output, external MOSFETs required; no integrated 5V LDO; uses current-mode control. | Better suited for designs requiring higher VIN margin (65V vs. 70V) but lower current; needs external gate drivers and bias supply. | Select LM5164QPWPRQ1 only if 1A output suffices and external FET flexibility is preferred over integration. |
| MPQ4420AGL-A-Z | 3.3V–65V input, 2A output, integrated FETs, but lacks PGOOD, programmable frequency, and ILIM pin; fixed 500 kHz. | Lower BOM cost for basic 2A POL, but no power-good signaling or current-limit tuning - limits use in safety-critical or sequenced systems. | Choose MPQ4420AGL-A-Z for cost-sensitive, non-sequenced applications where PGOOD and current-limit adjustment are unnecessary. |
Compared with LM5164QPWPRQ1 and MPQ4420AGL-A-Z, the MIC28512-2YFL-T5 uniquely combines 2A capability, 70V input rating, integrated 5V LDO, PGOOD, and programmable current-limit - making it optimal for industrial and telecom systems requiring robustness, sequencing, and design simplicity.
Availability
MIC28512-2YFL-T5 is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, base station power supplies, and wall transformer regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC28512-2YFL-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 Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, consumer, and communications markets with high-reliability silicon and development tools.
The MIC28512-2YFL-T5 belongs to Microchip's high-voltage synchronous buck regulator product line, designed specifically for rugged industrial and telecom power conversion where wide input range, integrated power stages, and comprehensive protection are mandatory.
FAQ
What is the maximum input voltage rating for the MIC28512-2YFL-T5?
The MIC28512-2YFL-T5 has an absolute maximum input voltage rating of +76V on PVIN/VIN pins, with a recommended operating range of 4.6V to 70V. Exceeding 70V may trigger overvoltage protection or cause permanent damage; operation above 70V is not guaranteed per datasheet specifications.
Does the MIC28512-2YFL-T5 require external MOSFETs?
No, the MIC28512-2YFL-T5 integrates both high-side and low-side N-channel MOSFETs - with typical RDS(on) values of 77 mΩ and 43 mΩ respectively - eliminating the need for external power switches and simplifying layout and thermal design.
How is the switching frequency programmed on the MIC28512-2YFL-T5?
The MIC28512-2YFL-T5 switching frequency is set via the FREQ pin (pin 24): tying it directly to VIN selects 680 kHz; connecting it to a resistor divider from VIN allows programming between 200 kHz and 680 kHz. The relationship is monotonic and specified in the datasheet's Electrical Characteristics table.
What is the purpose of the ILIM pin on the MIC28512-2YFL-T5?
The ILIM pin (pin 18) enables precise programming of the current-limit threshold by connecting an external resistor between ILIM and the SW node. This allows designers to tailor overcurrent protection to match specific inductor saturation and system fault-handling requirements.
Can the MIC28512-2YFL-T5 operate with a pre-biased output?
Yes, the MIC28512-2YFL-T5 supports start-up into a pre-biased output - confirmed in Figure 2-31 and Figure 2-32 of the datasheet - making it suitable for hot-swap and power-sequencing applications where the output rail is already partially charged before enable assertion.
What is the function of the PGOOD pin on the MIC28512-2YFL-T5?
The PGOOD pin (pin 15) is an open-drain output that asserts high when the FB voltage reaches ≥90% of the internal 0.8V reference (i.e., ≥0.72V), indicating valid output regulation. It requires an external pull-up resistor and is used for power sequencing, system monitoring, and fault indication in host systems.
MIC28512-2YFL-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):
- 70V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 59.5V
- Current - Output:
- 2A
- 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)
MIC28512-2YFL-T5 FAQ
1.How can I place an order for MIC28512-2YFL-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC28512-2YFL-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 MIC28512-2YFL-T5 reliable?
The price and inventory of MIC28512-2YFL-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC28512-2YFL-T5 is usually 5 days.
3.What payment methods are accepted for MIC28512-2YFL-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC28512-2YFL-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC28512-2YFL-T5?
MIC28512-2YFL-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC28512-2YFL-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 MIC28512-2YFL-T5?
For technical support, including MIC28512-2YFL-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC28512-2YFL-T5 requirements.
6.How does Aetrix verify that MIC28512-2YFL-T5 is sourced from the original manufacturer or authorized distributors?
All MIC28512-2YFL-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 MIC28512-2YFL-T5 meets industry standards.
7.What is the process for return or replacement of MIC28512-2YFL-T5?
All MIC28512-2YFL-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC28512-2YFL-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 MIC28512-2YFL-T5 part is unused and in its original packaging.
Return procedure for MIC28512-2YFL-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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