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Microchip Technology MIC24045-JFYFL-TR
- Part No.:
- MIC24045-JFYFL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MIC24045-JFYFL-TR.pdf
- Description:
- IC REG BUCK PROG 5A 20FQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC24045-JFYFL-TR from Microchip Technology is an I²C-programmable, 5A synchronous step-down DC/DC regulator with 4.5V–19V input range, 0.64V–5.25V programmable output voltage (5 mV to 50 mV steps), ±1% DC accuracy over –40°C to +125°C, and valley current-mode control - deployed in FPGA, ASIC, and server point-of-load power rails.
For engineers reviewing the MIC24045-JFYFL-TR datasheet, MIC24045-JFYFL-TR pinout, MIC24045-JFYFL-TR application, or MIC24045-JFYFL-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 diagnostics.
Technical Context
The MIC24045-JFYFL-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 kV/V DC gain) drives an external compensation network via the COMP pin, enabling stable loop response across wide operating conditions.
I²C interface supports Fast Mode (≤400 kHz), with nine address options set by ADR0/ADR1 pins. Diagnostics include real-time fault reporting (overcurrent, thermal warning at 120°C, shutdown at 160°C), PGOOD status with 90–95% rising threshold, and hiccup-mode overload protection triggered after 15 consecutive current-limit cycles.
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 LDO pre-regulation. |
| Max Output Current | 5A continuous - enables single-chip power delivery for mid-power FPGAs and multi-core processors. |
| Output Voltage Range | 0.64V to 5.25V in programmable steps (5/10/30/50 mV) - covers core, I/O, and auxiliary rails with fine-grained margining (±5%). |
| Switching Frequency | 310 kHz to 1.2 MHz (8 discrete settings) - allows optimization of inductor size vs. efficiency (e.g., 95%+ at 12V→3.3V/3A). |
| Output Voltage Accuracy | ±1% over –40°C to +125°C (0.64V–1.95V range) - ensures reliable operation under thermal stress in telecom and industrial environments. |
| Soft-Start Ramp Rate | 0.16 V/ms to 1.5 V/ms (4 programmable values) - prevents inrush current during cold start or hot-swap events. |
| Thermal Protection | 120°C thermal warning flag and 160°C shutdown with 25°C hysteresis - provides early system-level thermal management signaling. |
Pinout & Package
The MIC24045-JFYFL-TR is housed in a thermally enhanced 20-pin 3 mm × 3 mm FQFN package with exposed thermal pads (VIN_EP, PGND_EP, LX_EP) for low-θJA (29°C/W) and high-power density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2) | Input power supply connection | Drain of internal high-side MOSFET; requires local 10 µF ceramic decoupling to PGND. |
| PGND (Pins 3,4,13) | Power ground return | Source of low-side MOSFET and driver return; connects to input capacitor ground and thermal pad (PGND_EP). |
| 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 | Supplies gate driver for high-side FET; requires external capacitor between BST and LX. |
| PG (Pin 8) | Power-good open-drain output | Asserts high when VOUT reaches 92.5% of target; requires external pull-up for system sequencing. |
| ADR0/ADR1 (Pins 9,10) | I²C address configuration | Three-state inputs 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 reconfiguration and telemetry readback. |
| COMP (Pin 15) | Error amplifier output | Drives external RC compensation network to stabilize voltage loop; sets current reference for valley current control. |
| OUTSNS (Pin 16) | Output voltage sensing | Direct connection to regulated output; eliminates external feedback resistors and improves load/line regulation. |
| EN (Pin 17) | Enable control | 1.21V typical threshold with 135 mV hysteresis; internal 2 µA pull-down prevents floating startup. |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmability of soft-start ramp rate | Four selectable slew rates (0.16–1.5 V/ms) prevent inrush into capacitive loads or pre-biased outputs. |
| Valley current-mode control with auto-slope compensation | Stable operation across full duty cycle range without manual slope tuning; supports high-frequency designs up to 1.2 MHz. |
| Integrated high- and low-side MOSFETs (RDS(on) = 38/16 mΩ) | Reduces external component count and conduction losses; enables >95% peak efficiency at 12V→3.3V/3A. |
| Pre-biased output start-up support | Enables safe power sequencing in systems where output rail is powered before input (e.g., hot-swap backplanes). |
| Comprehensive I²C diagnostics | Real-time readback of thermal status, current limit hits, PGOOD state, and fault history - simplifies system health monitoring. |
Applications
| FPGA Core Power | Server Point-of-Load |
|---|---|
Use Scenario: Delivering tightly regulated 0.85V–1.2V core voltage to Xilinx Kintex or Intel Stratix FPGAs with dynamic load currents up to 5A. IC Role / Device Role / Timing Role: Primary synchronous buck regulator with I²C-configurable output voltage and soft-start to match FPGA configuration sequence. Use Value: ±1% output accuracy and valley current-mode stability ensure logic integrity during high di/dt transients; pre-bias support enables seamless reconfiguration. |
Use Scenario: Generating 1.8V I/O or 3.3V auxiliary rails in 1U rack servers with strict thermal and space constraints. IC Role / Device Role / Timing Role: Digitally programmable POL converter interfaced to BMC via I²C for remote voltage margining and fault logging. Use Value: 3×3 mm FQFN package with exposed thermal pads achieves <29°C/W θJA; thermal warning flag enables predictive fan control. |
| Telecom Baseband Processing | Industrial DSP Power |
Use Scenario: Supplying 1.0V–1.5V rails to multi-core baseband processors (e.g., TI TMS320C66xx) in LTE/5G remote radio units. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with programmable switching frequency to avoid noise coupling into sensitive RF sections. Use Value: Eight selectable frequencies (310 kHz–1.2 MHz) allow EMI filtering optimization; hiccup-mode OCP protects against sustained short-circuit faults. |
Use Scenario: Powering TI C6000 or Analog Devices SHARC DSPs in ruggedized industrial controllers requiring extended temperature operation. IC Role / Device Role / Timing Role: Robust POL regulator with –40°C to +125°C junction rating and ±1% accuracy over full temp range. Use Value: Internal LDO (VINLDO→VDDA) ensures analog circuit stability despite input ripple; AGND/PGND separation minimizes noise coupling. |
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-JFYML-TR | Pin-strappable (not I²C-programmable); identical pinout and electrical specs except for control interface. | Used where firmware-based reconfiguration is unnecessary and board-level strapping suffices for fixed-voltage rails. | Select MIC24046-JFYML-TR for cost-sensitive, static-voltage applications; retain MIC24045-JFYFL-TR when dynamic margining or telemetry is required. |
| TPS54560RGTT | Analog-controlled (resistor-programmed VOUT, no I²C); wider 3.5V–60V input, lower 5A max, no thermal warning flag. | Deployed in industrial 24V/48V systems where digital control is not needed and higher input voltage tolerance is critical. | Choose TPS54560RGTT only if input exceeds 19V or I²C telemetry is unnecessary; MIC24045-JFYFL-TR offers superior accuracy, diagnostics, and thermal visibility. |
Compared with MIC24046-JFYML-TR, the MIC24045-JFYFL-TR adds real-time I²C configurability and diagnostics at the cost of minor firmware integration effort; versus TPS54560RGTT, it delivers tighter output accuracy, integrated thermal warning, and finer programmability - making it optimal for compute-intensive, thermally constrained, or remotely monitored systems.
Availability
MIC24045-JFYFL-TR is available at Aetrix Electronics and suitable for FPGA core power, server point-of-load, and telecom baseband processing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MIC24045-JFYFL-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 embedded system integration.
The MIC24045-JFYFL-TR belongs to Microchip's digitally programmable DC/DC regulator product line, designed specifically for high-density, thermally demanding computing and communications infrastructure where precision, flexibility, and diagnostic visibility are critical.
FAQ
What is the maximum supported I²C clock frequency for the MIC24045-JFYFL-TR?
The MIC24045-JFYFL-TR supports I²C Fast Mode operation up to 400 kHz. This allows rapid reconfiguration of output voltage, switching frequency, soft-start ramp, and current limits without interrupting power delivery. The SCL and SDA pins are 3.3V-compatible with VIH ≥ 2V and VIL ≤ 1V when VDDA = 5V, ensuring robust communication in mixed-voltage systems.
Does the MIC24045-JFYFL-TR support start-up into a pre-biased output?
Yes, the MIC24045-JFYFL-TR supports safe start-up into a pre-biased output rail. Its valley current-mode architecture and dedicated control logic prevent reverse current flow during enable, allowing reliable operation in hot-swap and redundant power supply configurations. This behavior is confirmed in Figure 2-27 and Figure 2-28 of the official datasheet DS20005568B.
What thermal protection features does the MIC24045-JFYFL-TR provide?
The MIC24045-JFYFL-TR provides two-tier thermal protection: a thermal warning flag asserted at +120°C (TThWrn) and automatic shutdown at +160°C (TSHDN), with 25°C hysteresis. Both states are readable via I²C registers, enabling host systems to initiate cooling or graceful shutdown before catastrophic failure. The device's 3×3 mm FQFN package with exposed thermal pads ensures θJA = 29°C/W for effective heat dissipation.
Can the MIC24045-JFYFL-TR be used without external feedback resistors?
Yes, the MIC24045-JFYFL-TR eliminates external feedback resistors by using the OUTSNS pin connected directly to the output rail. An internal programmable reference (REFDAC) and sensing attenuator replace the traditional resistor divider, improving regulation accuracy and reducing component count. This architecture is explicitly described in Section 4.1 and Figure 4-1 of the MIC24045-JFYFL-TR datasheet.
What is the purpose of the COMP pin on the MIC24045-JFYFL-TR?
The COMP pin on the MIC24045-JFYFL-TR is the output of the transconductance error amplifier (1.4 mS, 50 kV/V gain) and serves as the control node for the external compensation network (typically RC connected to AGND). It sets the current reference for the valley current-mode modulator and determines loop stability - making it essential for optimizing transient response and phase margin across varying load, input, and frequency conditions.
MIC24045-JFYFL-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):
- 3.3V
- 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-JFYFL-TR FAQ
1.How can I place an order for MIC24045-JFYFL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC24045-JFYFL-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-JFYFL-TR reliable?
The price and inventory of MIC24045-JFYFL-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-JFYFL-TR is usually 5 days.
3.What payment methods are accepted for MIC24045-JFYFL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC24045-JFYFL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC24045-JFYFL-TR?
MIC24045-JFYFL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC24045-JFYFL-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-JFYFL-TR?
For technical support, including MIC24045-JFYFL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC24045-JFYFL-TR requirements.
6.How does Aetrix verify that MIC24045-JFYFL-TR is sourced from the original manufacturer or authorized distributors?
All MIC24045-JFYFL-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-JFYFL-TR meets industry standards.
7.What is the process for return or replacement of MIC24045-JFYFL-TR?
All MIC24045-JFYFL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC24045-JFYFL-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-JFYFL-TR part is unused and in its original packaging.
Return procedure for MIC24045-JFYFL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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