My Inquiry
My Account
Microchip Technology MIC28512-2YFL-TR
- Part No.:
- MIC28512-2YFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MIC28512-2YFL-TR.pdf
- Description:
- IC REG BUCK ADJ 2A 24FCQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,461
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC28512-2YFL-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 2A output current across a 4.6V–70V input range. It features HyperSpeed Control® architecture, programmable 200–680 kHz switching frequency, and a fixed 5 ms soft-start - enabling fast transient response in industrial power supplies and base station regulation.
For engineers reviewing the MIC28512-2YFL-TR datasheet, MIC28512-2YFL-TR pinout, MIC28512-2YFL-TR application, or MIC28512-2YFL-TR equivalent, key selection criteria include its wide VIN capability, internal 5V LDO, PGOOD output, adjustable current limit, and thermally enhanced 24-pin 3 mm × 4 mm FCQFN package with multiple PGND/SW/PVIN ePad connections.
Technical Context
The MIC28512-2YFL-TR implements adaptive on-time control with HyperSpeed Control® architecture, ensuring stable operation under high-VIN/low-VOUT conditions while maintaining constant switching frequency in CCM and reducing frequency in DCM for improved light-load efficiency. Its valley-based zero-current detection (ZCD) monitors LX and PGND to optimize timing.
It integrates dual N-channel MOSFETs (77 mΩ high-side, 43 mΩ low-side), a built-in 5V linear regulator (VDD), and independent PVDD supply for gate drive. Protection includes foldback current-limit, hiccup-mode short-circuit response, UVLO on VDD (4.2 V threshold), and thermal shutdown at 160°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6 V to 70 V - supports direct connection to unregulated industrial rails, automotive batteries, and telecom power buses without pre-regulation. |
| Output Current | Up to 2 A - sufficient for powering FPGA I/O banks, microcontroller cores, or isolated gate drivers in compact PCB layouts. |
| Switching Frequency | 200 kHz to 680 kHz (programmable via FREQ pin) - enables optimization of inductor size vs. EMI performance across diverse system constraints. |
| Feedback Reference | 0.8 V ±1% at 25°C - allows precise output voltage setting down to 0.8 V using standard resistor dividers, critical for low-voltage logic domains. |
| Thermal Resistance θJA | 30 °C/W - achieved via 24-pin FCQFN with exposed thermal pad (pins 25, 26, 27), enabling 2A operation at +85°C ambient without forced airflow. |
| Protection Features | Programmable current limit, hiccup-mode short-circuit protection, thermal shutdown, and PGOOD open-drain flag - reduces need for external supervision circuitry in safety-critical systems. |
| Junction Temperature | –40°C to +125°C - qualified for deployment in harsh environments including factory automation controllers and outdoor telecom equipment. |
Pinout & Package
Package: 24-pin 3 mm × 4 mm FCQFN (FL) with exposed thermal pads (PVIN: pins 4,7,8,9,25; PGND: pins 10,11,22,23,26; SW: pins 12,21,27). Thermally enhanced layout supports high-power density designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DL) | Low-side gate driver output | Internally connected to low-side MOSFET gate; must remain unconnected - no external drive or feedback required. |
| 2,10,11,22,23,26 (PGND) | Power ground return | Low-impedance source node for low-side MOSFET; all pins must be tied together and connected directly to input capacitor negative terminal. |
| 3 (DH) | High-side gate driver output | Internally connected to high-side MOSFET gate; must remain unconnected - no external drive or feedback required. |
| 4,7,8,9,25 (PVIN) | Main power input | Supplies high-side/low-side power switches; all pins must be shorted and bypassed locally with ceramic capacitors near input filter. |
| 5 (LX) | Switch node return | Reference for bootstrap capacitor (CBST); connects to SW pins and enables zero-current detection for adaptive timing control. |
| 6 (BST) | Bootstrap supply | Drives high-side MOSFET gate via 0.1 µF capacitor from LX; requires series resistor for noise filtering in high-dV/dt applications. |
| 12,21,27 (SW) | Power switch output | Internal node connecting both MOSFETs; ties directly to inductor input - forms critical high-current loop requiring minimal trace length. |
| 13 (AGND) | Analog reference ground | Separate return for FB, EN, PGOOD, and internal error amplifier; must be isolated from PGND to avoid noise coupling into regulation loop. |
| 14 (FB) | Output voltage sense | Compares divider voltage against 0.8 V reference; accuracy ±1% ensures <±12 mV error at 1.2 V output for DDR memory rails. |
| 15 (PGOOD) | Power status flag | Open-drain output asserting high when FB > 90% of 0.8 V; used for sequencing enable signals or fault latching in multi-rail systems. |
| 16 (EN) | Enable control input | Logic-high threshold 1.8 V (with 200 mV hysteresis); supports direct connection to MCU GPIO or upstream supervisor IC outputs. |
| 17 (VIN) | Main supply input | Primary input for internal LDO and control logic; accepts full 4.6–70 V range and requires local 1 µF AGND decoupling. |
| 18 (ILIM) | Current limit programming | Connects to SW node via resistor to set foldback threshold; enables accurate overcurrent protection matching load requirements. |
| 19 (VDD) | Internal 5 V regulator output | Supplies core logic; delivers 5.2 V ±0.2 V at 10 mA; must be bypassed with 1 µF capacitor - ties to VIN if VIN < 5.5 V. |
| 20 (PVDD) | Low-side driver supply | Provides gate drive energy for low-side MOSFET; can be tied to VDD externally; requires 1 µF PGND decoupling. |
| 24 (FREQ) | Switching frequency adjust | Voltage-controlled input: connect to VIN for 680 kHz, or use resistor divider for 200–680 kHz tuning - sets oscillator timing without external crystal. |
Key Features
| Feature | Design Value |
|---|---|
| HyperSpeed Control® architecture | Enables ultra-fast load transient response (<40 μs recovery from 0→2 A) without external compensation components - reduces output capacitance by up to 50%. |
| Integrated 5 V linear regulator (VDD) | Eliminates need for external bias supply; operates in dropout mode below 5.5 V VIN, supporting seamless startup from brownout conditions. |
| Programmable current-limit foldback | Allows precise setting of peak inductor current via ILIM-to-SW resistor; prevents destructive overcurrent during short-circuit events. |
| Fixed 5 ms soft-start | Guarantees controlled ramp-up of output voltage without inrush current spikes - protects input capacitors and upstream converters. |
| Thermally enhanced FCQFN package | 24-pin 3×4 mm body with three dedicated thermal ePads (PVIN, PGND, SW) achieves 30 °C/W θJA - sustains full 2 A load at +85°C ambient. |
| Power Good (PGOOD) open-drain output | Provides system-level power sequencing signal with 100 μs delay and 6% hysteresis - simplifies integration into multi-rail PMIC architectures. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
|
Use Scenario: Providing isolated 5 V/2 A rails for PLC I/O modules operating from 24 V or 48 V factory bus. IC Role / Device Role / Timing Role: Primary buck regulator converting unregulated industrial rail to stable logic supply; manages sequencing via EN and PGOOD. Use Value: Wide 4.6–70 V input accommodates voltage sags and surges common in factory environments; thermal robustness ensures reliability without heatsinks. |
Use Scenario: Local point-of-load conversion on high-density server backplanes where space limits discrete solutions. IC Role / Device Role / Timing Role: Compact synchronous buck delivering 3.3 V/2 A from 12 V mid-rail; uses HyperSpeed Control® for sub-50 μs transient response. Use Value: Integrated MOSFETs and FCQFN package reduce footprint by >40% vs. controller+discrete-FET solutions; eliminates gate-drive layout complexity. |
| Base Station Power Supplies | Wall Transformer Regulation |
|
Use Scenario: Generating 5 V bias for RF front-end amplifiers in 4G/LTE remote radio units powered from 48 V telecom plant. IC Role / Device Role / Timing Role: High-efficiency buck converter with hiccup-mode protection; interfaces with baseband processor via EN/PGOOD for fault reporting. Use Value: 70 V absolute max rating withstands lightning-induced transients; 125°C junction rating supports sealed outdoor enclosures. |
Use Scenario: Replacing linear regulators in universal-input AC/DC adapters to improve efficiency and reduce thermal dissipation. IC Role / Device Role / Timing Role: Secondary-side synchronous buck regulating 12 V DC input to 5 V USB output; leverages internal VDD LDO for single-supply simplicity. Use Value: 2A capability supports USB-C PD charging; programmable frequency avoids audible noise in consumer-grade transformers. |
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 | 4.5–65 V input, 1 A output, external MOSFETs required; no integrated VDD LDO; requires external compensation. | Lacks integrated 5 V bias rail and internal gate drivers - increases BOM count and layout sensitivity in space-constrained designs. | Select when higher VIN margin (65 V vs. 70 V) is acceptable and design flexibility justifies added external components. |
| MPQ4420AGL-A-Z | 3.3–65 V input, 2 A output, integrated MOSFETs; fixed 500 kHz frequency; no programmable current limit or PGOOD. | Missing ILIM pin and open-drain PGOOD limits fault diagnostics and current tailoring in mission-critical systems. | Prefer for cost-sensitive, non-safety-critical applications where fixed frequency and simplified feature set suffice. |
Compared with LM5164QPWPRQ1 and MPQ4420AGL-A-Z, the MIC28512-2YFL-TR uniquely combines 70 V max input, integrated 5 V LDO, programmable current limit, and PGOOD in a thermally optimized FCQFN - making it optimal for industrial and telecom systems demanding robustness, integration, and diagnostic capability.
Availability
MIC28512-2YFL-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 guaranteed traceability.
Supply support for MIC28512-2YFL-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 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 MIC28512 product line delivers high-input-voltage synchronous buck regulators optimized for ruggedized power conversion in harsh environments - emphasizing wide VIN range, integrated protection, and thermal resilience.
FAQ
What is the maximum input voltage rating for the MIC28512-2YFL-TR?
The MIC28512-2YFL-TR has an absolute maximum input voltage rating of +76 V on PVIN/VIN pins, with a recommended operating range of 4.6 V to 70 V. This wide range enables direct connection to 48 V telecom systems, 24 V industrial buses, and automotive battery rails - including cold-crank and load-dump transients - without external pre-regulation stages.
Does the MIC28512-2YFL-TR require external MOSFETs?
No, the MIC28512-2YFL-TR integrates both high-side and low-side N-channel MOSFETs (77 mΩ and 43 mΩ typical RDS(ON)). This eliminates external FETs, gate drivers, and associated layout complexity - reducing solution size and improving reliability in space-constrained applications such as base station RF modules and PLC edge nodes.
How is the switching frequency programmed on the MIC28512-2YFL-TR?
The MIC28512-2YFL-TR switching frequency is set via the FREQ pin (pin 24): connecting it directly to VIN selects 680 kHz; applying a resistor divider from VIN to FREQ enables continuous adjustment between 200 kHz and 680 kHz. This allows designers to balance inductor size, EMI compliance, and light-load efficiency without changing the IC or layout.
What is the purpose of the ILIM pin on the MIC28512-2YFL-TR?
The ILIM pin (pin 18) enables precise programming of the current-limit threshold by connecting a resistor between ILIM and the SW node. This sets foldback behavior during overcurrent events - protecting downstream loads and the MIC28512-2YFL-TR itself - and supports customization for different inductor saturation currents or cable-drop compensation requirements.
Can the MIC28512-2YFL-TR operate with a pre-biased output?
Yes, the MIC28512-2YFL-TR supports start-up into a pre-biased output, as confirmed in Figures 2-31 and 2-32 of the datasheet. This capability prevents reverse current flow during hot-plug or multi-rail sequencing scenarios - ensuring safe power-up of systems where the output capacitor may retain residual voltage before input is applied.
MIC28512-2YFL-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):
- 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-TR FAQ
1.How can I place an order for MIC28512-2YFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC28512-2YFL-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 MIC28512-2YFL-TR reliable?
The price and inventory of MIC28512-2YFL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC28512-2YFL-TR is usually 5 days.
3.What payment methods are accepted for MIC28512-2YFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC28512-2YFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC28512-2YFL-TR?
MIC28512-2YFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC28512-2YFL-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 MIC28512-2YFL-TR?
For technical support, including MIC28512-2YFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC28512-2YFL-TR requirements.
6.How does Aetrix verify that MIC28512-2YFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC28512-2YFL-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 MIC28512-2YFL-TR meets industry standards.
7.What is the process for return or replacement of MIC28512-2YFL-TR?
All MIC28512-2YFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC28512-2YFL-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 MIC28512-2YFL-TR part is unused and in its original packaging.
Return procedure for MIC28512-2YFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC28512-2YFL-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…
