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Microchip Technology MIC24045-KDYFL-TR
- Part No.:
- MIC24045-KDYFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MIC24045-KDYFL-TR.pdf
- Description:
- IC REG BUCK PROG 5A 20FQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC24045-KDYFL-TR from Microchip Technology is an I²C-programmable, 5A synchronous step-down DC/DC regulator with 4.5V–19V input range, programmable output voltage (0.64V–5.25V), and valley current-mode control. It delivers ±1% output voltage accuracy over temperature for FPGA, ASIC, and server core-rail applications requiring dynamic voltage scaling and telemetry.
For engineers reviewing the MIC24045-KDYFL-TR datasheet, MIC24045-KDYFL-TR pinout, MIC24045-KDYFL-TR application, or MIC24045-KDYFL-TR equivalent, key selection criteria include I²C-configurable soft-start ramp (0.16–1.5 V/ms), selectable switching frequency (310 kHz–1.2 MHz), per-rail current limit programming (2A–5A), pre-biased start-up support, and thermal warning/shutdown thresholds at 120°C/160°C.
Technical Context
The MIC24045-KDYFL-TR implements valley current-mode PWM control with internal slope compensation automatically adapted to switching frequency, VIN–VOUT differential, and output voltage range. Its transconductance error amplifier (1.4 mS) drives an external RC compensation network at the COMP pin, enabling stable loop response across wide operating conditions.
It integrates dual internal LDOs: a 5V analog supply (VDDA) with 3.5V UVLO and a MOSFET driver rail (VDDP) fed via a 10Ω internal resistor from VDDA. All critical parameters-including output voltage, soft-start, frequency, current limits, margining (±5%), and startup delay (0–10 ms)-are configured via I²C interface compliant with Fast Mode (400 kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 19V - supports 5V, 12V, and 19V intermediate bus architectures without external regulators |
| Max Output Current | 5A continuous - enables single-chip power delivery for high-performance FPGAs and multi-core processors |
| Output Voltage Range | 0.64V to 5.25V in 5/10/30/50 mV steps - covers DDR memory, CPU cores, I/O, and auxiliary rails |
| Switching Frequency | 310 kHz to 1.2 MHz - allows optimization of inductor size vs. efficiency (e.g., 660 kHz typical for 12V→1.8V @ 5A) |
| Output Voltage Accuracy | ±1% over –40°C to +125°C (0.64V–1.95V range) - ensures tight regulation under thermal stress in servers and base stations |
| Efficiency | >95% peak - achieved via low RDS(on) (38 mΩ HS / 16 mΩ LS) and valley current-mode control minimizing conduction loss |
| Thermal Protection | Thermal warning at 120°C and shutdown at 160°C with 25°C hysteresis - prevents damage during sustained overload or airflow loss |
Pinout & Package
The MIC24045-KDYFL-TR is housed in a thermally enhanced 20-pin 3 mm × 3 mm FQFN package with three exposed thermal pads (VIN_EP, PGND_EP, LX_EP) for PCB-level heat dissipation. The package supports junction temperatures up to +125°C and has θJA = 29°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2) | Main input power rail connection | Drain of internal high-side FET; requires local 10 µF ceramic decoupling to PGND |
| PGND (Pins 3, 4, 13) | Power ground return | Source of low-side FET and driver return; must be connected to input capacitor ground |
| LX (Pins 5, 6) | Switch node | Connection point between internal HS/LS FETs; ties to inductor and BST capacitor bottom |
| BST (Pin 7) | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 0.1 µF ceramic capacitor to LX |
| PG (Pin 8) | Open-drain power-good indicator | Asserts high when VOUT is within ±7.5% of nominal; requires external pull-up to 3.3V/5V |
| ADR0/ADR1 (Pins 9, 10) | I²C address configuration | Three-state pins defining one of nine I²C addresses (0x20–0x28); enable multi-device bus sharing |
| SCL/SDA (Pins 11, 12) | I²C serial interface | Fast Mode (400 kHz) compatible; SDA is open-drain, supports standard host controller connection |
| AGND (Pin 14) | Analog ground reference | Quiet return for error amplifier and feedback divider; must be separated from PGND and tied at single point |
| COMP (Pin 15) | Error amplifier output | Drives external Type II/III compensation network; sets loop bandwidth and phase margin |
| OUTSNS (Pin 16) | Output voltage sensing | Direct connection to regulated output; eliminates external resistive divider and improves accuracy |
| EN (Pin 17) | Enable control input | 1.21V threshold with 135 mV hysteresis; internal 2 µA pull-down prevents floating startup |
| VDDA (Pin 18) | Analog supply rail | 5V LDO output powering internal analog circuitry; requires 2.2 µF ceramic to AGND |
| VDDP (Pin 19) | Driver supply rail | Internally generated from VDDA via 10Ω resistor; requires 2.2 µF ceramic to PGND for noise filtering |
| VINLDO (Pin 20) | LDO input | Typically tied to VIN; if sourced separately, requires 100 nF bypass to PGND |
| VIN_EP / PGND_EP / LX_EP (Pins 21–23) | Exposed thermal pads | Electrically tied to respective pins; require thermal vias to inner ground/power planes for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmability of soft-start ramp rate | Four selectable slew rates (0.16/0.38/0.76/1.5 V/ms) enable controlled inrush current management across diverse load capacitances |
| Pre-biased output start-up support | Allows safe turn-on into existing output voltage (e.g., hot-swap or rail sequencing), preventing reverse current flow into powered loads |
| Extensive I²C diagnostics | Real-time readback of thermal status, current limit events, PGOOD state, and fault counters - enables predictive maintenance in telecom systems |
| Valley current-mode control with auto-slope compensation | Eliminates need for external slope compensation components while ensuring stability at all duty cycles and frequencies |
| Pinout compatibility with MIC24046 | Enables drop-in migration from I²C-programmable to pin-strapped configuration without PCB redesign |
Applications
| Server Core Rail Power | FPGA Dynamic Voltage Scaling |
|---|---|
Use Scenario: Providing tightly regulated 0.85V–1.2V core voltage to dual-socket Xeon or EPYC processors in 1U rack servers with strict thermal envelope constraints. IC Role / Device Role / Timing Role: Primary buck regulator delivering up to 5A per rail with I²C telemetry for real-time thermal and current monitoring. Use Value: ±1% output accuracy and 120°C thermal warning allow firmware-based throttling before shutdown, improving system uptime and reliability. | Use Scenario: Supplying reconfigurable logic banks in Xilinx Versal or Intel Agilex FPGAs where voltage must scale dynamically with clock frequency and computational load. IC Role / Device Role / Timing Role: Digitally programmable step-down converter with sub-10 ms startup delay and ±5% margining for validation testing. Use Value: I²C-configurable output voltage and soft-start enable runtime adaptation to process corners and aging effects without hardware change. |
| Telecom Base Station ASIC Power | Industrial Edge AI Accelerator Rail |
Use Scenario: Powering 5G NR baseband ASICs requiring multiple independent 1.0V, 1.8V, and 3.3V rails with coordinated sequencing and fault reporting. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter supporting I²C daisy-chaining for centralized rail management. Use Value: 95% peak efficiency and 3 mm × 3 mm footprint reduce board area and thermal load in dense RF modules. | Use Scenario: Delivering 1.2V/4A to NVIDIA Jetson Orin or AMD Kria KV260-based edge inference engines operating in uncontrolled ambient environments. IC Role / Device Role / Timing Role: Thermally robust DC/DC regulator with -40°C to +125°C operation and hiccup-mode overload protection. Use Value: Thermal warning at 120°C triggers fan control or workload redistribution, extending product lifetime in fanless enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC24046-KDYML-TR | Pin-strappable (not I²C-programmable); identical pinout, same 5A rating and 4.5V–19V input range | Used where firmware control is unnecessary and fixed configuration simplifies BOM and qualification | Select when deterministic startup behavior and absence of I²C bus contention outweigh need for runtime reconfiguration |
| TPS54560RGTT | Non-I²C, adjustable via external resistor divider; 60V max input, 5A output, current-mode control | Targets industrial/high-voltage applications (e.g., 24V/48V buses) rather than 5V/12V computing rails | Choose for wider input range and higher VIN tolerance where digital telemetry is not required |
Compared with MIC24046-KDYML-TR, the MIC24045-KDYFL-TR adds runtime voltage/frequency/current limit adjustment and diagnostic visibility at the cost of I²C bus dependency; versus TPS54560RGTT, it trades off input voltage headroom for precision regulation, telemetry, and smaller solution size in space-constrained computing systems.
Availability
MIC24045-KDYFL-TR is available at Aetrix Electronics and suitable for server motherboard design, FPGA power management, and telecom base station development requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for MIC24045-KDYFL-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, FPGA, and power management ICs, serving automotive, industrial, communications, and computing markets with vertically integrated silicon and software solutions.
The MIC24045-KDYFL-TR belongs to Microchip's digitally programmable power management portfolio, designed specifically for high-density, telemetry-enabled DC/DC conversion in data center, networking, and edge AI infrastructure where dynamic voltage scaling and thermal intelligence are critical.
FAQ
What is the maximum supported I²C clock frequency for configuring the MIC24045-KDYFL-TR?
The MIC24045-KDYFL-TR supports I²C Fast Mode operation up to 400 kHz. This allows rapid register writes for dynamic voltage scaling and fault logging without introducing significant bus latency. All configuration registers-including output voltage, soft-start, switching frequency, and current limits-are accessible within this timing constraint. The MIC24045-KDYFL-TR does not support High-Speed Mode (3.4 MHz) or SMBus-specific protocols.
Does the MIC24045-KDYFL-TR support pre-biased output start-up, and how is it implemented?
Yes, the MIC24045-KDYFL-TR supports safe start-up into a pre-biased output. It achieves this by disabling the high-side FET until the internal error amplifier detects that the OUTSNS voltage matches the programmed target, preventing reverse current flow through the low-side FET body diode. This behavior is inherent to the valley current-mode architecture and requires no external components or register configuration. The MIC24045-KDYFL-TR maintains this capability across its full 0.64V–5.25V output range.
How does the MIC24045-KDYFL-TR handle overcurrent conditions, and what protection modes are available?
The MIC24045-KDYFL-TR provides dual overcurrent protection: cycle-by-cycle valley current limiting on both high-side and low-side FETs, with four programmable thresholds (2A–5A), and hiccup-mode overload response after 15 consecutive current-limit cycles. Hiccup mode forces LX into high-Z for 13.5 ms (scaled by soft-start rate) before attempting restart. This protects downstream components during sustained short circuits while minimizing thermal stress. The MIC24045-KDYFL-TR reports current-limit events via I²C status registers for system-level fault handling.
What is the role of the OUTSNS pin, and why is it preferred over traditional resistive feedback dividers?
The OUTSNS pin connects directly to the regulated output and serves as the top node of an internal precision feedback divider. This eliminates external resistors, removing their tolerance errors, temperature drift, and layout sensitivity. As a result, the MIC24045-KDYFL-TR achieves ±1% output voltage accuracy over temperature without calibration. The OUTSNS path also enables accurate remote sensing and supports pre-biased start-up by providing real-time output voltage information to the control loop before regulation begins.
Can the MIC24045-KDYFL-TR be used without I²C configuration, and what are the default settings?
Yes, the MIC24045-KDYFL-TR powers up with factory-default register values: 1.0V output, 660 kHz switching frequency, 0.76 V/ms soft-start, 5A current limit, and 0 ms startup delay. These defaults allow immediate operation without I²C initialization-ideal for prototyping or fail-safe boot sequences. However, full functionality-including voltage margining, thermal warning reporting, and fine-grained current limiting-requires I²C access. The MIC24045-KDYFL-TR retains all default settings until explicitly overwritten via the I²C interface.
MIC24045-KDYFL-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 20-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 19V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A
- Frequency - Switching:
- 570kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-FQFN (3x3)
MIC24045-KDYFL-TR FAQ
1.How can I place an order for MIC24045-KDYFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC24045-KDYFL-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 MIC24045-KDYFL-TR reliable?
The price and inventory of MIC24045-KDYFL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC24045-KDYFL-TR is usually 5 days.
3.What payment methods are accepted for MIC24045-KDYFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC24045-KDYFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC24045-KDYFL-TR?
MIC24045-KDYFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC24045-KDYFL-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 MIC24045-KDYFL-TR?
For technical support, including MIC24045-KDYFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC24045-KDYFL-TR requirements.
6.How does Aetrix verify that MIC24045-KDYFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC24045-KDYFL-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 MIC24045-KDYFL-TR meets industry standards.
7.What is the process for return or replacement of MIC24045-KDYFL-TR?
All MIC24045-KDYFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC24045-KDYFL-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 MIC24045-KDYFL-TR part is unused and in its original packaging.
Return procedure for MIC24045-KDYFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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