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Microchip Technology MIC24045-2ZYFL-TR
- Part No.:
- MIC24045-2ZYFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MIC24045-2ZYFL-TR.pdf
- Description:
- IC REG BUCK PROG 5A 20FQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,723
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Product details
Overview
MIC24045-2ZYFL-TR from Microchip Technology is an I²C-programmable, valley current-mode synchronous step-down regulator delivering up to 5A output current across a 4.5V–19V input range. It provides programmable output voltage (0.64V–5.25V), switching frequency (310kHz–1.2MHz), soft-start ramp rates (0.16–1.5 V/ms), and current limits (2A–5A), targeting FPGA, ASIC, and server core-rail power delivery.
For engineers reviewing the MIC24045-2ZYFL-TR datasheet, MIC24045-2ZYFL-TR pinout, MIC24045-2ZYFL-TR application, or MIC24045-2ZYFL-TR equivalent, key selection criteria include I²C-configurable margining (±5%), ±1% output accuracy over –40°C to +125°C, pre-biased start-up support, and thermal warning/shutdown thresholds at 120°C/160°C.
Technical Context
The MIC24045-2ZYFL-TR implements valley current-mode 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 MOSFET drivers with low RDS(on) (38 mΩ high-side, 16 mΩ low-side), a 5V analog supply (VDDA) with 3.5V UVLO, and a dedicated VDDP rail for gate drive. All programmable parameters-including soft-start delay (0–10 ms), output voltage margining, and hiccup-mode overload protection-are stored in I²C-accessible registers.
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 - delivers full-rated current with thermal derating above +125°C junction temperature |
| Output Voltage Range | 0.64V to 5.25V in 5/10/30/50 mV steps - enables precise core voltage scaling for FPGAs and ASICs |
| Switching Frequency | 310 kHz to 1.2 MHz - selectable in 8 discrete values to optimize efficiency vs. solution size |
| Output Voltage Accuracy | ±1% (0.64V–1.95V) - ensures tight regulation under load, line, and temperature variation |
| Efficiency | >95% typical - achieved via low-RDS(on) integrated FETs and valley current-mode control |
| Junction Temperature Range | –40°C to +125°C - qualified for industrial and telecom equipment environments |
Pinout & Package
The MIC24045-2ZYFL-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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 2) | Input power supply 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; connects to exposed thermal pad (PGND_EP) |
| LX (Pins 5, 6) | Switch node | Connection point between internal high- and low-side FETs; ties to inductor and BST capacitor |
| BST (Pin 7) | Bootstrap supply | Provides gate drive voltage for high-side FET; capacitor connected between BST and LX |
| PG (Pin 8) | Power-good open-drain output | Asserts logic high when VOUT is within ±7.5% of nominal; requires external pull-up |
| 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) slave interface for real-time parameter programming and status readback |
| COMP (Pin 15) | Error amplifier output | Drives external RC compensation network; sets loop bandwidth and phase margin |
| OUTSNS (Pin 16) | Output voltage sensing | Direct connection to regulated output; eliminates external feedback resistors and improves accuracy |
| EN (Pin 17) | Enable control input | 1.21V threshold with 135 mV hysteresis; internal 2 µA pull-down prevents floating startup |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmability | Full runtime reconfiguration of VOUT, fSW, soft-start, current limit, margining, and startup delay without hardware changes |
| Valley current-mode control | Enables stable operation at duty cycles <50% with auto-adjusted slope compensation for robust transient response |
| Pre-biased output start-up | Safe turn-on into existing output voltage without reverse current or overshoot-critical for hot-swap and multi-rail sequencing |
| Integrated diagnostics | Real-time fault reporting (overcurrent, thermal warning, thermal shutdown, PG loss) via I²C status registers |
| Thermal management | Dedicated thermal warning (120°C) and shutdown (160°C) with 25°C hysteresis; exposed pads reduce θJA to 29°C/W |
Applications
| FPGA Core Power | Server DDR Memory Rail |
|---|---|
Use Scenario: Powering Xilinx or Intel FPGA core voltages (e.g., 0.85V, 0.95V) requiring dynamic voltage scaling and tight regulation. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with I²C-controlled VOUT and soft-start for adaptive core voltage management. Use Value: ±1% output accuracy and programmable 5 mV steps ensure compliance with FPGA VCCINT tolerance; pre-biased start-up avoids rail collapse during partial reconfiguration. |
Use Scenario: Delivering 1.2V or 1.35V to DDR4/DDR5 memory subsystems in rack-mounted servers with strict ripple and transient requirements. IC Role / Device Role / Timing Role: High-current, digitally programmable DC-DC converter supporting fast load-step response and margining for system validation. Use Value: 5A capability, 1.2 MHz switching, and valley current-mode control deliver sub-100 mV undershoot on 4A load steps; ±5% margining enables production test margin verification. |
| Telecom Baseband Processor | Industrial Edge AI Accelerator |
Use Scenario: Supplying 1.0V–1.8V rails to baseband SoCs in 5G small cells where thermal density and remote firmware updates are critical. IC Role / Device Role / Timing Role: Digitally configurable power stage with I²C-based thermal monitoring and fault logging for field-reconfigurable power policies. Use Value: Thermal warning (120°C) and shutdown (160°C) thresholds allow predictive throttling; I²C register access enables runtime firmware-driven power policy adaptation. |
Use Scenario: Powering heterogeneous AI accelerators (e.g., NPU + DSP cores) in fanless edge gateways requiring silent, reliable operation across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: High-efficiency, thermally robust buck regulator with extended junction temperature rating and diagnostic visibility. Use Value: 95%+ efficiency at 3.3V/4A reduces thermal load; 3 mm × 3 mm FQFN with exposed pads enables conduction-cooled PCB layout without heatsinks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC24046-2ZYML-TR | Pin-strappable (not I²C-programmable); identical pinout and electrical specs except for control interface | Used where firmware control is unnecessary and fixed configuration suffices | Select when I²C infrastructure is unavailable or design simplicity outweighs configurability |
| TPS54560RGTT | Analog-programmable (resistor-based VOUT/fSW); no I²C, no margining, no thermal warning register | Targeted at cost-sensitive industrial supplies lacking digital telemetry needs | Select only if digital diagnostics, remote reconfiguration, and ±5% margining are not required |
Compared with MIC24045-2ZYFL-TR, the MIC24046-2ZYML-TR offers identical performance with simplified pin-strapping but forfeits runtime flexibility, while the TPS54560RGTT lacks I²C telemetry and thermal warning-making it unsuitable for systems requiring firmware-managed power health monitoring.
Availability
MIC24045-2ZYFL-TR is available at Aetrix Electronics and suitable for FPGA core power, server DDR memory rails, and telecom baseband processor applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MIC24045-2ZYFL-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 devices, and power management ICs, with deep expertise in mixed-signal and digital power solutions.
The MIC24045-2ZYFL-TR belongs to Microchip's MIC240xx family of I²C-programmable DC-DC regulators, designed specifically for high-density computing and communications systems demanding precision, configurability, and real-time telemetry.
FAQ
What is the maximum supported I²C clock frequency for the MIC24045-2ZYFL-TR?
The MIC24045-2ZYFL-TR supports Fast-mode I²C operation up to 400 kHz. This allows rapid register writes for dynamic voltage scaling and fault status polling without introducing timing bottlenecks in host firmware. The SCL and SDA pins are 3.3V-compatible with 2V VIH and 1V VIL thresholds when VDDA = 5V.
Does the MIC24045-2ZYFL-TR support start-up into a pre-biased output?
Yes, the MIC24045-2ZYFL-TR explicitly supports safe start-up into a pre-biased output voltage. Its valley current-mode architecture and controlled gate-drive sequencing prevent reverse current flow and output overshoot, making it suitable for hot-swap and multi-rail sequencing applications where downstream circuitry may already be powered.
What is the purpose of the OUTSNS pin on the MIC24045-2ZYFL-TR?
The OUTSNS pin on the MIC24045-2ZYFL-TR provides direct Kelvin sensing of the output voltage at the load, eliminating external feedback resistors and associated errors. It connects internally to the top of the programmable DAC-based feedback divider, enabling ±1% accuracy and simplifying layout by removing resistor matching and noise pickup concerns.
How does thermal management work in the MIC24045-2ZYFL-TR?
The MIC24045-2ZYFL-TR features two thermal thresholds: a warning flag asserts at 120°C junction temperature, and automatic shutdown occurs at 160°C with 25°C hysteresis. These states are readable via I²C status registers. The 3 mm × 3 mm FQFN package includes three exposed thermal pads (VIN_EP, PGND_EP, LX_EP) to minimize θJA to 29°C/W.
Can the MIC24045-2ZYFL-TR be used without external compensation components?
No-the MIC24045-2ZYFL-TR requires an external RC compensation network connected between the COMP and AGND pins. The transconductance error amplifier output drives this network to stabilize the voltage loop; omitting it results in instability. Typical designs use RC1 = 2.55 kΩ, CC1 = 10 nF, and CC2 = 47 pF for 1.8V/570 kHz operation.
MIC24045-2ZYFL-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):
- 0.64V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A
- Frequency - Switching:
- 310kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-FQFN (3x3)
MIC24045-2ZYFL-TR FAQ
1.How can I place an order for MIC24045-2ZYFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC24045-2ZYFL-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 MIC24045-2ZYFL-TR reliable?
The price and inventory of MIC24045-2ZYFL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC24045-2ZYFL-TR is usually 5 days.
3.What payment methods are accepted for MIC24045-2ZYFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC24045-2ZYFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC24045-2ZYFL-TR?
MIC24045-2ZYFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC24045-2ZYFL-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 MIC24045-2ZYFL-TR?
For technical support, including MIC24045-2ZYFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC24045-2ZYFL-TR requirements.
6.How does Aetrix verify that MIC24045-2ZYFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC24045-2ZYFL-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 MIC24045-2ZYFL-TR meets industry standards.
7.What is the process for return or replacement of MIC24045-2ZYFL-TR?
All MIC24045-2ZYFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC24045-2ZYFL-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 MIC24045-2ZYFL-TR part is unused and in its original packaging.
Return procedure for MIC24045-2ZYFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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