My Inquiry
My Account
Microchip Technology MIC28512-1YFL-T5
- Part No.:
- MIC28512-1YFL-T5
- Manufacturer:
- Microchip Technology
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MIC28512-1YFL-T5.pdf
- Description:
- IC REG BUCK ADJ 2A 24FCQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC28512-1YFL-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 2A output current from a 4.6V–70V input range. It features HyperLight Load® architecture, 0.8V ±1% feedback reference, and fixed 5 ms soft-start - optimized for industrial power supplies and high-voltage single-board systems.
For engineers reviewing the MIC28512-1YFL-T5 datasheet, MIC28512-1YFL-T5 pinout, MIC28512-1YFL-T5 application, or MIC28512-1YFL-T5 equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and switching performance, and real-world alternative selection guidance for high-input-voltage buck conversion designs.
Technical Context
The MIC28512-1YFL-T5 implements adaptive on-time control with fixed tON estimation, enabling constant-frequency operation in CCM while reducing switching frequency in DCM to improve light-load efficiency. Its HyperLight Load® architecture (specific to MIC28512-1 variants) enables ultra-fast transient response and reduced output capacitance requirements.
It integrates dual N-channel MOSFETs (77 mΩ high-side, 43 mΩ low-side), a built-in 5V LDO (VDD), programmable current-limit via ILIM pin, and PGOOD open-drain output with 90% VOUT threshold. Thermal shutdown activates at 160°C with 15°C hysteresis, and UVLO ensures stable startup across the full 4.6V–70V input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.6V to 70V - supports wide industrial and automotive supply rails without external pre-regulation. |
| Output Current | Up to 2A continuous - sufficient for point-of-load regulation of FPGAs, DSPs, and multi-rail subsystems. |
| Feedback Reference | 0.8V ±1% (25°C), ±2% (–40°C to +125°C) - enables precise adjustable output down to 0.8V with minimal resistor tolerance impact. |
| Switching Frequency | 200 kHz to 680 kHz, programmable via FREQ pin - allows EMI optimization and inductor size trade-offs. |
| Thermal Resistance θJA | 30°C/W (3 mm × 4 mm FCQFN) - enables 2A operation up to +85°C ambient without forced airflow. |
| Protection Features | Programmable current-limit foldback, hiccup-mode short-circuit protection, thermal shutdown, and UVLO - ensures robust fault recovery in unattended systems. |
| Junction Temperature | –40°C to +125°C operating range - qualified for harsh industrial and base station environments. |
Pinout & Package
Package: 24-pin 3 mm × 4 mm FCQFN (FL) with exposed thermal pad (pins 25–27). Thermally enhanced for high-power density applications.
| 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. |
| 2, 10, 11, 22, 23, 26 (PGND) | Power ground | Return path for low-side MOSFET and power stage; requires low-impedance PCB plane tie to input capacitor negative. |
| 3 (DH) | High-side gate drive | Internal connection to high-side MOSFET gate; must remain unconnected - not user-accessible. |
| 4, 7, 8, 9, 25 (PVIN) | Power input voltage | Primary input power path for internal switches; all pins must be shorted and locally bypassed with ceramic capacitors. |
| 5 (LX) | Switch node return | Connection point for bootstrap capacitor negative terminal and SW node; critical for zero-current detection. |
| 6 (BST) | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1 µF capacitor to LX and optional series resistor for shoot-through mitigation. |
| 12, 21, 27 (SW) | Switch node output | Internal power switch output; tied together and connected to inductor; carries high di/dt and requires tight layout. |
| 13 (AGND) | Analog ground | Separate ground return for FB, EN, PGOOD, and control circuitry - must be isolated from PGND until single-point tie. |
| 14 (FB) | Feedback input | Senses output via resistive divider; regulates VOUT to 0.8V reference; bias current ≤500 nA minimizes divider error. |
| 15 (PGOOD) | Power good output | Open-drain signal asserting when VFB ≥90% of reference (≈0.72V); requires external pull-up for system sequencing. |
| 16 (EN) | Enable input | Logic-controlled startup; active-high with 1.8V threshold and 200 mV hysteresis - usable as precision UVLO. |
| 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 resistor to set overcurrent threshold; enables accurate foldback protection calibration. |
| 19 (VDD) | Internal 5V regulator output | Supplies control logic; regulated 4.8–5.4V at 10 mA; ties to VIN if input <5.5V; requires 1 µF bypass to AGND. |
| 20 (PVDD) | Low-side driver supply | 5V supply for low-side gate driver; typically tied to VDD; requires 1 µF ceramic cap to PGND. |
| 24 (FREQ) | Frequency adjust | Resistor-divider programmable pin; connects to VIN for 680 kHz, or to mid-point for lower frequencies (e.g., 340 kHz at 50% VIN). |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® architecture | Enables ultra-fast load transient response and >85% efficiency at 10 mA output - critical for intermittent IoT and sensor nodes. |
| Integrated dual N-MOSFETs | 77 mΩ high-side + 43 mΩ low-side RDS(on) reduces conduction loss and eliminates external switch selection and layout complexity. |
| Programmable current-limit foldback | Allows precise overcurrent threshold setting via ILIM-to-SW resistor - prevents thermal runaway during sustained overload. |
| Built-in 5V linear regulator (VDD) | Eliminates need for external bias supply; supports single-supply operation across full input range, including drop-out below 5.5V. |
| Fixed 5 ms soft-start | Prevents inrush current and output overshoot during startup - simplifies input capacitor sizing and avoids system brownouts. |
| Thermally-enhanced FCQFN package | 3 mm × 4 mm footprint with ePad delivers 30°C/W θJA, enabling compact 2A designs without heatsinks or airflow. |
Applications
| Industrial Power Supplies | Distributed Supply Regulation |
|---|---|
|
Use Scenario: Providing 5V/3.3V rails from 24V or 48V factory bus in PLCs, motor drives, and I/O modules. IC Role / Device Role / Timing Role: Primary synchronous buck converter regulating intermediate voltage rails with high efficiency and thermal resilience. Use Value: Delivers 2A continuously at >92% efficiency (VIN=24V, VOUT=5V), minimizing board-level heat and enabling fanless enclosures. |
Use Scenario: Local regulation on dense PCBs where centralized PSUs feed multiple point-of-load converters. IC Role / Device Role / Timing Role: Standalone step-down regulator with integrated MOSFETs and internal compensation - no external loop components required. Use Value: Reduces BOM count by 6+ parts (MOSFETs, drivers, bootstrap network) and shrinks layout area by >40% vs. controller + discrete solution. |
| Base Station Power Supplies | Wall Transformer Regulation |
|
Use Scenario: Converting –48V telecom supply to 5V/12V for RF front-end ICs and digital baseband processors. IC Role / Device Role / Timing Role: High-input-voltage buck regulator supporting reverse-polarity input protection and wide-temp operation. Use Value: Operates reliably from –40°C to +125°C junction temperature with 160°C thermal shutdown - meets Telcordia GR-63-CORE reliability requirements. |
Use Scenario: Replacing linear regulators or legacy controllers in universal AC/DC adapters powering consumer electronics. IC Role / Device Role / Timing Role: High-efficiency primary-side DC/DC stage accepting rectified 60–70V DC from bridge outputs. Use Value: Achieves >88% efficiency at 2A (VIN=60V, VOUT=5V), cutting standby power loss and meeting DOE Level VI standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4312-AEC1-LF-P | Automotive-grade (AEC-Q100), 4.5V–60V input, 2A, integrated MOSFETs, but lacks programmable current limit and HyperLight Load® mode. | Targeted for automotive infotainment and ADAS; not rated for >70V input or industrial temp range. | Choose MPQ4312-AEC1-LF-P only for AEC-Q100-compliant automotive designs requiring 125°C ambient operation - not a drop-in replacement. |
| LM5164QPWPRQ1 | 4.5V–65V input, 1A, external MOSFETs required, no integrated VDD LDO, but offers spread-spectrum EMI reduction. | Used in cost-sensitive, lower-current applications where layout flexibility outweighs integration benefits. | Choose LM5164QPWPRQ1 when designing for EMI-sensitive environments and willing to add two external MOSFETs and gate drivers - higher BOM and layout effort. |
Compared with MPQ4312-AEC1-LF-P and LM5164QPWPRQ1, the MIC28512-1YFL-T5 uniquely combines 70V max input, 2A capability, HyperLight Load® efficiency, and integrated 5V LDO - making it optimal for non-automotive industrial systems demanding wide input range and minimal external components.
Availability
MIC28512-1YFL-T5 is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and base station power supplies requiring stable component supply and long-term production continuity.
Supply support for MIC28512-1YFL-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 MIC28512 family was designed specifically for high-input-voltage synchronous buck conversion in space-constrained industrial systems - emphasizing integration, thermal robustness, and ease of design-in without external compensation.
FAQ
What is the maximum input voltage rating for the MIC28512-1YFL-T5?
The MIC28512-1YFL-T5 has an absolute maximum input voltage rating of +76V on PVIN/VIN pins, with guaranteed operational range from 4.6V to 70V. This makes it suitable for 48V industrial buses and rectified AC line applications where transient spikes may exceed nominal rail voltage.
Does the MIC28512-1YFL-T5 require external compensation components?
No, the MIC28512-1YFL-T5 features internal compensation - no external Type II or Type III compensation network is needed. The adaptive on-time control architecture eliminates the need for loop compensation components, reducing design time and BOM count.
How does the HyperLight Load® architecture improve light-load efficiency in the MIC28512-1YFL-T5?
The HyperLight Load® architecture in the MIC28512-1YFL-T5 enables discontinuous conduction mode (DCM) operation at light loads, reducing switching losses and maintaining >85% efficiency even at 10 mA output current - critical for battery-backed or energy-harvesting systems.
Can the MIC28512-1YFL-T5 be used with a pre-biased output during startup?
Yes, the MIC28512-1YFL-T5 supports pre-biased output startup - Figures 2-47 and 2-48 in the datasheet confirm stable turn-on with 2V pre-bias at IOUT = 0A and 2A. This prevents reverse current flow and ensures reliable power sequencing in multi-rail systems.
What is the purpose of the ILIM pin on the MIC28512-1YFL-T5?
The ILIM pin on the MIC28512-1YFL-T5 allows precise programming of the current-limit threshold by connecting a resistor between ILIM and the SW node. This sets foldback behavior and hiccup-mode trip point - essential for protecting downstream circuits during sustained overloads or short circuits.
MIC28512-1YFL-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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)
MIC28512-1YFL-T5 FAQ
1.How can I place an order for MIC28512-1YFL-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC28512-1YFL-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 MIC28512-1YFL-T5 reliable?
The price and inventory of MIC28512-1YFL-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC28512-1YFL-T5 is usually 5 days.
3.What payment methods are accepted for MIC28512-1YFL-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC28512-1YFL-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC28512-1YFL-T5?
MIC28512-1YFL-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC28512-1YFL-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 MIC28512-1YFL-T5?
For technical support, including MIC28512-1YFL-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC28512-1YFL-T5 requirements.
6.How does Aetrix verify that MIC28512-1YFL-T5 is sourced from the original manufacturer or authorized distributors?
All MIC28512-1YFL-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 MIC28512-1YFL-T5 meets industry standards.
7.What is the process for return or replacement of MIC28512-1YFL-T5?
All MIC28512-1YFL-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC28512-1YFL-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 MIC28512-1YFL-T5 part is unused and in its original packaging.
Return procedure for MIC28512-1YFL-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC28512-1YFL-T5 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…
