My Inquiry
My Account
Microchip Technology MIC28513-2YFL-TR
- Part No.:
- MIC28513-2YFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MIC28513-2YFL-TR.pdf
- Description:
- IC REG BUCK ADJ 4A 24FCQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,198
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC28513-2YFL-TR 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, adjustable 200–680 kHz switching frequency, and a fixed 5 ms soft-start - enabling fast transient response in industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MIC28513-2YFL-TR datasheet, MIC28513-2YFL-TR pinout, MIC28513-2YFL-TR application, or MIC28513-2YFL-TR equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping (24-pin 3 mm × 4 mm FQFN), real-world application constraints, and two rigorously cross-checked alternative parts for design continuity.
Technical Context
The MIC28513-2YFL-TR employs adaptive on-time control with HyperSpeed Control® architecture to maintain stable switching frequency under varying load and line conditions while enabling ultra-fast load transient recovery. Its zero-current detection (ZCD) circuit monitors the SW node via PGND-referenced sensing, and internal 0.8V reference accuracy is ±1% at 25°C (±2% over –40°C to +125°C).
It integrates a 5V linear regulator (VDD) with UVLO (4.2V rising threshold), programmable current-limit via ILIM pin, hiccup-mode short-circuit protection, and thermal shutdown at 160°C. The device operates in continuous conduction mode by default and does not support discontinuous mode - unlike the MIC28513-1 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 45V - supports wide industrial and automotive supply rails without external pre-regulation. |
| Max Output Current | 4A - sustained delivery enabled by integrated 37 mΩ high-side and 20 mΩ low-side MOSFETs. |
| Switching Frequency | 200 kHz to 680 kHz - adjustable via FREQ pin; higher frequencies reduce inductor size but increase switching loss. |
| Feedback Reference | 0.8V ±1% (25°C) - sets output voltage via external resistor divider; enables down to 0.8V output. |
| Soft-Start Time | Fixed 5 ms - digitally ramped VREF prevents inrush current and eliminates output overshoot at startup. |
| Junction Temp Range | –40°C to +125°C - qualified for harsh environments; thermal shutdown triggers at 160°C with 15°C hysteresis. |
| Package | 24-pin 3 mm × 4 mm FQFN (FL) - thermally enhanced with exposed PGND pads (pins 10, 11, 22, 23, 26) and ePad (pin 25). |
Pinout & Package
Package: 24-pin 3 mm × 4 mm FQFN (FL) with exposed thermal pad (ePad = PVIN pin 25, PGND pins 10/11/22/23/26, SW pins 12/21/27). Thermal resistance θJA = 30°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DL) | Low-side gate drive | Internal connection to low-side MOSFET gate; must remain unconnected or floating - no external drive. |
| 2, 10, 11, 22, 23, 26 (PGND) | Power ground return | Low-impedance return path for low-side MOSFET source and power stage; ties directly to input capacitor negative terminal. |
| 3 (DH) | High-side gate drive | Internal connection to high-side MOSFET gate; must remain unconnected or floating - no external drive. |
| 4, 7, 8, 9, 25 (PVIN) | Power input supply | Primary input voltage rail for internal power switches; all pins must be shorted and locally bypassed with ceramic capacitors. |
| 5 (LX) | Switch node return | Return path for high-side driver; connects to bootstrap capacitor negative terminal and SW pins (12/21/27). |
| 6 (BST) | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF capacitor from LX to BST. |
| 12, 21, 27 (SW) | Switch node output | Internal power switch output; connects to inductor; multiple pins reduce parasitic inductance and improve thermal spreading. |
| 13 (AGND) | Analog ground | Separate ground return for feedback, reference, and control circuitry - 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 0.8V; requires external pull-up for system monitoring. |
| 16 (EN) | Enable control | Logic-level input (1.8V high / 0.6V low); precise UVLO behavior allows use as input supply monitor. |
| 17 (VIN) | LDO input supply | Supplies internal bias circuits; same 4.6V–45V range as PVIN; requires 1 µF ceramic decoupling to AGND. |
| 18 (ILIM) | Current limit programming | Connects to SW node via resistor to set peak current limit; enables accurate foldback protection. |
| 19 (VDD) | Internal 5V regulator output | Stable 5V ±4% supply for internal logic; powers control circuitry; bypass with 1 µF capacitor to AGND. |
| 20 (PVDD) | Low-side driver supply | Can be tied to VDD; powers low-side gate driver; requires 1 µF ceramic capacitor to PGND. |
| 24 (FREQ) | Frequency adjustment | Voltage-controlled input: connect to VIN for 680 kHz, or use resistor divider to scale frequency down to 200 kHz. |
Key Features
| Feature | Design Value |
|---|---|
| HyperSpeed Control® architecture | Enables ultra-fast load transient response (<1 ms recovery) and reduced output capacitance requirements in high-VIN/low-VOUT applications. |
| Integrated power MOSFETs | 37 mΩ high-side + 20 mΩ low-side RDS(on) eliminate external FETs and gate drivers - simplifying layout and reducing BOM count. |
| Programmable current-limit protection | Resistor-based ILIM pin allows precise setting of overcurrent threshold; foldback and hiccup modes prevent damage during hard shorts. |
| Built-in 5V linear regulator | Single-supply operation enabled: VDD powers internal logic and drivers from VIN - no auxiliary supply needed above 5.5V. |
| Thermally enhanced FQFN | 3 mm × 4 mm footprint with multiple PGND/SW/PVIN ePads achieves θJA = 30°C/W - critical for 4A continuous operation in compact designs. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
|
Use Scenario: Central 24V or 48V bus powering multiple PCBs with local 3.3V/5V/12V rails in factory automation controllers. IC Role / Device Role / Timing Role: Primary buck regulator converting high-voltage distribution rail to intermediate point-of-load voltage. Use Value: 4A capability and 45V max input tolerate brownouts and surges; HyperSpeed Control® maintains regulation during PLC I/O switching transients. |
Use Scenario: Field-deployed remote I/O modules requiring reliable 5V/3A supply from unregulated 12–36V vehicle or solar input. IC Role / Device Role / Timing Role: Standalone DC/DC converter providing isolated, regulated output without external controller or driver ICs. Use Value: Integrated MOSFETs and internal compensation eliminate 7+ external components; -40°C to +125°C rating ensures outdoor reliability. |
| Base Station Power Supplies | Wall Transformer Regulation |
|
Use Scenario: Intermediate 12V rail generation in 5G small-cell radio units powered from 48V telecom rectifiers. IC Role / Device Role / Timing Role: High-efficiency step-down stage feeding downstream POL converters and RF front-end bias supplies. Use Value: 680 kHz max switching frequency enables compact 2.2 µH inductors; PGOOD signal synchronizes enable sequencing with FPGA configuration. |
Use Scenario: Replacement for aging linear regulators in universal AC/DC wall adapters targeting USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Efficient primary DC/DC stage replacing inefficient 78xx-style regulators in space-constrained enclosures. Use Value: 4.6V min input supports dropout from 6V rectified AC; 5 ms soft-start prevents tripping GFCI outlets during plug-in surge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4333GQ-AEC1-P | Automotive-grade (AEC-Q100), 45V/3.5A, fixed 500 kHz, no FREQ adjust or ILIM pin. | Lacks programmable frequency and current limit; requires external current-sense resistor for overcurrent protection. | Choose for automotive qualification needs where fixed-frequency simplicity outweighs tuning flexibility. |
| LM61480RQR | 42V/8A, adjustable 200–2.2 MHz, spread-spectrum EMI reduction, no integrated bootstrap diode. | Higher current and frequency range; requires external bootstrap diode and more complex compensation. | Choose when >4A output or sub-100 ns minimum off-time is required; verify thermal margin with 3×3 mm QFN footprint. |
Compared with MPQ4333GQ-AEC1-P and LM61480RQR, the MIC28513-2YFL-TR uniquely balances 4A capability, 200–680 kHz programmability, and full protection integration in a thermally optimized 3×4 mm FQFN - making it optimal for industrial and telecom systems needing design flexibility without automotive overhead or excessive complexity.
Availability
MIC28513-2YFL-TR 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 traceable sourcing.
Supply support for MIC28513-2YFL-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 leading provider of microcontrollers, analog, interface, power management, and timing solutions, serving industrial, automotive, communications, and consumer markets with vertically integrated silicon and software.
The MIC28513 product line delivers high-voltage synchronous buck regulators with integrated MOSFETs and advanced control architectures - designed specifically for rugged, high-input-voltage applications where efficiency, transient response, and thermal performance are critical.
FAQ
What is the key functional difference between MIC28513-2YFL-TR and MIC28513-1?
The MIC28513-2YFL-TR uses HyperSpeed Control® architecture for ultra-fast transient response and fixed-frequency operation across load ranges, while the MIC28513-1 uses HyperLight Load® architecture supporting discontinuous conduction mode (DCM) at light loads. The MIC28513-2YFL-TR does not enter DCM and maintains continuous operation - optimizing stability and ripple performance in medium-to-heavy load applications. Both share identical pinout, package, and core protection features.
How is the switching frequency programmed on MIC28513-2YFL-TR?
The MIC28513-2YFL-TR switching frequency is set via the FREQ pin (pin 24): connecting it directly to VIN selects 680 kHz; applying a voltage between 0.5×VIN and VIN using a resistor divider scales frequency linearly down to 200 kHz. The relationship is specified in the datasheet as fSW ≈ 680 kHz × (VFREQ/VVIN). No external clock signal or capacitor is required - enabling simple, robust frequency tuning without added components.
Does MIC28513-2YFL-TR require external bootstrap diodes?
No, the MIC28513-2YFL-TR does not require an external bootstrap diode. Its internal bootstrap circuit uses a charge pump topology driven from the LX node and BST pin, with only a 0.1 µF ceramic capacitor needed between BST and LX (pin 5). This eliminates diode forward voltage drop and leakage concerns, improving reliability and simplifying layout compared to traditional bootstrap implementations.
What is the role of the ILIM pin on MIC28513-2YFL-TR, and how is it configured?
The ILIM pin (pin 18) on MIC28513-2YFL-TR enables precise programming of the peak current limit by connecting a resistor between ILIM and the SW node. The current-limit threshold is calculated using RILIM = VTH / ILS, where VTH is the internal threshold (–14 mV typical) and ILS is the sensed low-side MOSFET current. A small capacitor from ILIM to PGND filters switching noise, ensuring accurate foldback protection during short-circuit events.
Can MIC28513-2YFL-TR operate with input voltage below 5.5V?
Yes, the MIC28513-2YFL-TR supports input voltages as low as 4.6V. When VIN is below 5.5V, the internal 5V LDO (VDD) enters dropout mode; per datasheet guidance, VDD must be externally tied to VIN in such cases to ensure proper biasing of control circuitry. The device remains fully functional - including PGOOD, EN, and FB regulation - down to 4.6V, making it suitable for battery-backed or low-voltage industrial rails.
MIC28513-2YFL-TR 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-TR FAQ
1.How can I place an order for MIC28513-2YFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC28513-2YFL-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 MIC28513-2YFL-TR reliable?
The price and inventory of MIC28513-2YFL-TR 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-TR is usually 5 days.
3.What payment methods are accepted for MIC28513-2YFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC28513-2YFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC28513-2YFL-TR?
MIC28513-2YFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC28513-2YFL-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 MIC28513-2YFL-TR?
For technical support, including MIC28513-2YFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC28513-2YFL-TR requirements.
6.How does Aetrix verify that MIC28513-2YFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC28513-2YFL-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 MIC28513-2YFL-TR meets industry standards.
7.What is the process for return or replacement of MIC28513-2YFL-TR?
All MIC28513-2YFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC28513-2YFL-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 MIC28513-2YFL-TR part is unused and in its original packaging.
Return procedure for MIC28513-2YFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC28513-2YFL-TR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
