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Microchip Technology MIC24045-DIYFL-TR
- Part No.:
- MIC24045-DIYFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MIC24045-DIYFL-TR.pdf
- Description:
- IC REG BUCK PROG 5A 20FQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,819
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Product details
Overview
MIC24045-DIYFL-TR from Microchip Technology is an I²C-programmable, 5A synchronous step-down regulator with 4.5V–19V input range, 0.64V–5.25V programmable output voltage (in 5/10/30/50 mV steps), ±1% DC accuracy over temperature (0.64V–1.95V), and valley current-mode control. It delivers high efficiency (>95%) and supports safe start-up into pre-biased outputs in FPGA, ASIC, and server power rail applications.
For engineers reviewing the MIC24045-DIYFL-TR datasheet, MIC24045-DIYFL-TR pinout, MIC24045-DIYFL-TR application, or MIC24045-DIYFL-TR equivalent, key selection criteria include I²C-configurable soft-start ramp rates (0.16–1.5 V/ms), switching frequency tuning (310 kHz–1.2 MHz), per-rail current limit programming (2A–5A), output voltage margining (±5%), and thermal warning/shutdown thresholds (120°C/160°C).
Technical Context
The MIC24045-DIYFL-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, 50,000 V/V DC gain) drives an external compensation network via the COMP pin, enabling stable loop response across wide operating conditions.
I²C interface (up to 400 kHz Fast Mode) provides full register access for output voltage, soft-start slew rate, switching frequency, current limits, start-up delay (0–10 ms), and margining. Diagnostics include real-time status flags, hiccup-mode overload protection (15-cycle detection), and thermal warning at 120°C with 25°C hysteresis before shutdown at 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 19V - supports wide industrial and telecom input rails including 5V, 12V, and 19V systems without external pre-regulation. |
| Max Output Current | 5A - continuous load capability with integrated 38 mΩ high-side and 16 mΩ low-side MOSFETs (at +25°C). |
| Output Voltage Range | 0.64V to 5.25V - digitally programmable in four LSB ranges (5/10/30/50 mV) for precision core and I/O rail generation. |
| Output Accuracy | ±1% over –40°C to +125°C (0.64V–1.95V range) - enables tight regulation for low-voltage FPGA/ASIC cores without external trimming. |
| Switching Frequency | 310 kHz to 1.2 MHz - selectable in 8 discrete values to optimize EMI, efficiency, and inductor size trade-offs. |
| Soft-Start Slew Rate | 0.16 V/ms to 1.5 V/ms - configurable ramp rate prevents inrush current during power-up into capacitive loads. |
| Thermal Protection | Thermal warning at 120°C, shutdown at 160°C with 25°C hysteresis - ensures reliable operation under sustained overload or poor airflow. |
Pinout & Package
The MIC24045-DIYFL-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 low-θJA (29°C/W) and robust thermal performance in high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2) | Main input supply connection | Drain of internal high-side FET; requires local 10 µF ceramic decoupling to PGND for stability and EMI suppression. |
| PGND (Pins 3,4,13) | Power ground return | Source of low-side FET and driver return; must be connected directly to input capacitor ground and thermal pad for minimal impedance path. |
| LX (Pins 5,6) | Switch node | Connection point between internal high- and low-side FETs; ties to inductor and bootstrap capacitor bottom terminal. |
| BST (Pin 7) | Bootstrap supply | Provides gate drive voltage for high-side FET; requires external 0.1 µF ceramic capacitor between BST and LX. |
| PG (Pin 8) | Open-drain power-good indicator | Asserts high when VOUT reaches 92.5% of nominal; requires external pull-up to compatible logic rail (≤5.5V). |
| ADR0/ADR1 (Pins 9,10) | I²C address configuration | Three-state pins defining nine unique I²C addresses (0x20–0x28); enable multi-device bus addressing without external resistors. |
| SCL/SDA (Pins 11,12) | I²C serial interface | Standard open-drain I²C bus lines (3.3V-compatible); support up to 400 kHz Fast Mode for fast register writes and diagnostics reads. |
| AGND (Pin 14) | Analog ground reference | Quiet ground for error amplifier and feedback circuitry; must be isolated from noisy PGND except at single-point star connection. |
| COMP (Pin 15) | Error amplifier output | Drives external Type-II or Type-III compensation network; sets loop bandwidth and phase margin for stable transient response. |
| OUTSNS (Pin 16) | Output voltage sensing | Direct connection to regulated output; eliminates need for external resistor divider and improves accuracy and noise immunity. |
| EN (Pin 17) | Precision enable control | 1.21V typical threshold with 135 mV hysteresis; internal 2 µA pull-down prevents floating startup; supports programmable 0–10 ms delay. |
| VDDA (Pin 18) | Analog supply rail | 5V internal LDO output (4.8–5.4V); powers analog blocks and requires 2.2 µF ceramic bypass to AGND. |
| VDDP (Pin 19) | Driver supply rail | Internally generated from VDDA via 10 Ω resistor; powers gate drivers and requires 2.2 µF ceramic bypass to PGND. |
| VINLDO (Pin 20) | LDO input supply | Accepts same rail as VIN or separate 4.5–5.5V source; bypassed with 100 nF ceramic if decoupled from main VIN. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-programmable output voltage | 0.64V–5.25V in four precision LSB steps (5/10/30/50 mV), enabling exact matching to processor core/I/O voltage requirements without external dividers. |
| Valley current-mode control with auto-slope compensation | Ensures stable current-loop operation across all duty cycles and frequencies without manual compensation tuning or external components. |
| Pre-biased output start-up support | Allows safe power sequencing into already-charged output rails-critical for hot-swap and multi-rail systems where VOUT may be powered by another regulator. |
| Extensive I²C diagnostics and status registers | Real-time monitoring of thermal state, current limit events, PG status, and fault history-enables predictive maintenance and system-level health reporting. |
| Thermally optimized 3×3 mm FQFN with EP pads | Low thermal resistance (29°C/W) and direct thermal vias to internal copper layers support 5A continuous operation in compact 12 mm² footprint. |
Applications
| Server CPU Core Rail | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Powering 0.85V–1.2V core rails for dual-socket Xeon or AMD EPYC servers with dynamic load steps up to 4A/µs. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with I²C-configured 0.16 V/ms soft-start and 500 kHz switching to minimize output ripple and EMI in dense motherboard layouts. Use Value: ±1% output accuracy over –40°C to +125°C ensures stable CPU operation under thermal stress; thermal warning flag enables proactive throttling before shutdown. | Use Scenario: Delivering 1.8V or 3.3V to Xilinx or Intel FPGA I/O banks with simultaneous switching noise (SSN) sensitivity. IC Role / Device Role / Timing Role: Digitally programmable step-down converter with OUTSNS direct sensing and 10 mV LSB resolution for precise I/O voltage calibration. Use Value: Valley current-mode control and external compensation provide >60° phase margin at full load, suppressing SSN-induced droop and overshoot during bank reconfiguration. |
| Telecom Base Station ASIC Supply | Industrial Edge AI Accelerator Rail |
Use Scenario: Generating 1.0V–1.5V supplies for multi-core DSPs and packet processors in 5G RU/DU units with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: High-efficiency (≥92% at 12VIN/1.2VOUT/3A) buck regulator with 1.2 MHz switching to reduce inductor size and meet strict SWaP-C targets. Use Value: Programmable current limit (3A/4A/5A) allows one BOM to support multiple ASIC SKUs; hiccup-mode protection prevents latch-up during short-circuit faults. | Use Scenario: Powering 0.75V–0.95V core rails for NVIDIA Jetson Orin or Intel Movidius VPUs in fanless edge enclosures with limited airflow. IC Role / Device Role / Timing Role: Thermally robust 5A regulator with 120°C thermal warning and 160°C shutdown, enabling graceful degradation instead of abrupt failure. Use Value: Exposed thermal pads (VIN_EP, PGND_EP, LX_EP) reduce junction-to-board thermal resistance by >40%, sustaining 5A output at +70°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC24046-DIYFL-TR | Pin-strappable (not I²C-programmable); identical pinout and electrical specs; lacks I²C interface, diagnostics, and soft-start programmability. | Suitable only for fixed-voltage, non-dynamic systems requiring no runtime reconfiguration or telemetry. | Select when firmware overhead, I²C bus resources, or diagnostic logging are unavailable or unnecessary. |
| TPS54560BQPWPRQ1 | Non-I²C, adjustable via external resistor divider; 60V max input; lower max output current (5A typical, not guaranteed); no thermal warning or margining. | Designed for automotive (AEC-Q100) and harsh-environment use; lacks digital configurability and precision accuracy over temperature. | Select for 12V/24V automotive subsystems where extended input range and qualification outweigh programmability needs. |
Compared with MIC24046-DIYFL-TR, the MIC24045-DIYFL-TR adds full I²C configurability, real-time diagnostics, and thermal warning-critical for adaptive power management in data centers. Versus TPS54560BQPWPRQ1, it trades automotive qualification for superior accuracy (±1% vs ±2%), digital flexibility, and thermal intelligence in computing applications.
Availability
MIC24045-DIYFL-TR is available at Aetrix Electronics and suitable for server power delivery, FPGA/ASIC core rail generation, and telecom base station power conversion requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MIC24045-DIYFL-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 global semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with emphasis on reliability, longevity, and design-in support for industrial and computing markets.
The MIC24045-DIYFL-TR belongs to Microchip's MIC24xxx family of digitally programmable DC-DC regulators, engineered specifically for high-density, multi-rail power systems in servers, networking equipment, and programmable logic platforms.
FAQ
What is the maximum supported I²C clock frequency for the MIC24045-DIYFL-TR?
The MIC24045-DIYFL-TR supports I²C Fast Mode operation up to 400 kHz. This allows rapid register writes for dynamic voltage scaling and efficient read-back of status registers such as thermal warning, current limit events, and power-good state-all confirmed in the DS20005568B datasheet Section 4.0 and Table 7-1.
Does the MIC24045-DIYFL-TR support start-up into a pre-biased output voltage?
Yes, the MIC24045-DIYFL-TR explicitly supports safe start-up into pre-biased outputs, as documented in the General Description and Figure 2-27/2-28 of DS20005568B. This feature prevents reverse current flow and output overshoot when the output rail is already charged, making it suitable for hot-swap and multi-regulator sequencing scenarios.
What is the purpose of the OUTSNS pin on the MIC24045-DIYFL-TR?
The OUTSNS pin on the MIC24045-DIYFL-TR provides direct sensing of the output voltage at the load, eliminating the need for external feedback resistors. As stated in Section 3.12 and Figure 1-1 of DS20005568B, this architecture improves regulation accuracy, reduces component count, and enhances noise immunity compared to traditional resistor-divider-based feedback.
How does the MIC24045-DIYFL-TR implement thermal protection?
The MIC24045-DIYFL-TR features two-tier thermal protection: a thermal warning flag asserts at +120°C (with no hysteresis specified), followed by hard thermal shutdown at +160°C with 25°C hysteresis (DS20005568B, Table 1-6). This allows host systems to initiate thermal throttling before shutdown, improving system resilience in sustained overload conditions.
Can the MIC24045-DIYFL-TR operate with different input and VDDA supply voltages?
Yes-the MIC24045-DIYFL-TR accepts independent inputs on VIN (4.5V–19V) and VINLDO (4.5V–5.5V), allowing VDDA to be powered from a clean 5V rail while the power stage operates from a higher, noisier input. Section 3.16 of DS20005568B specifies that VINLDO must be bypassed with a 100 nF ceramic capacitor if decoupled from VIN, ensuring stable analog supply under mixed-rail conditions.
MIC24045-DIYFL-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):
- 1V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A
- Frequency - Switching:
- 780kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-FQFN (3x3)
MIC24045-DIYFL-TR FAQ
1.How can I place an order for MIC24045-DIYFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC24045-DIYFL-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-DIYFL-TR reliable?
The price and inventory of MIC24045-DIYFL-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-DIYFL-TR is usually 5 days.
3.What payment methods are accepted for MIC24045-DIYFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC24045-DIYFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC24045-DIYFL-TR?
MIC24045-DIYFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC24045-DIYFL-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-DIYFL-TR?
For technical support, including MIC24045-DIYFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC24045-DIYFL-TR requirements.
6.How does Aetrix verify that MIC24045-DIYFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC24045-DIYFL-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-DIYFL-TR meets industry standards.
7.What is the process for return or replacement of MIC24045-DIYFL-TR?
All MIC24045-DIYFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC24045-DIYFL-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-DIYFL-TR part is unused and in its original packaging.
Return procedure for MIC24045-DIYFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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