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Microchip Technology MIC23656-FAYFT-TR
- Part No.:
- MIC23656-FAYFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-PowerUFQFN
- Datasheet:
-
MIC23656-FAYFT-TR.pdf
- Description:
- IC REG BUCK PROG 6A 16FTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,003
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Product details
Overview
MIC23656-FAYFT-TR from Microchip Technology is a high-efficiency, I²C-programmable 6A peak synchronous step-down regulator with Constant-On-Time (COT) control and HyperLight Load™ mode. It operates from 2.4V–5.5V input, delivers 0.9V default output (5 mV resolution up to 1.28V), and integrates power-good monitoring, thermal latch-off protection, and output discharge. It serves as the primary core voltage regulator for FPGA and SSD power rails.
For engineers reviewing the MIC23656-FAYFT-TR datasheet, MIC23656-FAYFT-TR pinout, MIC23656-FAYFT-TR application, or MIC23656-FAYFT-TR equivalent, key selection criteria include I²C-configurable slew rate (0.42–3.42 ms/V), 10 A high-side current limit, ±1.5% output accuracy over temperature, and compatibility with the MIC23650 footprint for drop-in migration in space-constrained portable designs.
Technical Context
The MIC23656-FAYFT-TR implements adaptive Constant-On-Time control with HyperLight Load™ mode to maintain >90% efficiency at light loads while delivering ultra-fast transient response (<10 µs recovery). Its 8-bit DAC enables precise 0.6V–1.28V output programming via I²C (0x5B address), with four programmable enable delay options (0.25–3 ms) and slew-rate control across 16 steps.
It integrates dual MOSFETs (30 mΩ HS / 16 mΩ LS typical RDS(on)), latch-off thermal shutdown at 165°C, and open-drain PG output with 91% threshold and 4% hysteresis. The device supports 100% duty cycle operation for low-dropout battery operation and features internal 10 Ω output discharge when EN = GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - supports single-cell Li-ion battery systems without external pre-regulation. |
| Output Current (Peak) | 6A pulsed - sufficient for FPGA core rail transients and SSD controller burst loads. |
| Default Output Voltage | 0.9V - safe startup level for low-voltage ASICs; programmable to 0.6V–1.28V in 5 mV steps. |
| High-Side Current Limit | 10A typical - configurable via I²C; enables robust short-circuit protection with hiccup mode. |
| Efficiency (Max) | Up to 95% - achieved at mid-load with 0.47 µH inductor and 2×47 µF output capacitance. |
| Output Voltage Accuracy | ±1.5% over line/load/temperature - ensures stable logic-level compliance for 0.9V FPGA cores. |
| I²C Speed | Up to 3.4 MHz - supports fast configuration during system boot or dynamic voltage scaling. |
| Shutdown Current | 1.5 µA typical - minimizes battery drain in always-on subsystems or sleep states. |
Pinout & Package
Package: 16-lead 2.5 mm × 2.5 mm × 0.55 mm thin FTQFN with exposed thermal pad (EP), rated for -40°C to +125°C junction temperature and θJA = 45°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 (SW) | Switch Node | High-current connection to external inductor; requires short, wide PCB trace to minimize switching loss and EMI. |
| 2, 3, 13, 14, 15 (PGND) | Power Ground | Low-impedance return path for high-side/low-side MOSFETs and bulk capacitors; must be separated from AGND. |
| 4, 5 (PVIN) | Main Input Supply | Connects to 2.4V–5.5V source; requires local 1 µF ceramic capacitor to PGND for high-frequency decoupling. |
| 6 (SVIN) | Analog Input Supply | Powers internal reference/control circuits; internally biased from PVIN via 10 Ω resistor; needs dedicated 1 µF cap to AGND. |
| 7 (SCL) | I²C Clock Input | Open-drain slave clock input; supports standard/fast/high-speed modes up to 3.4 MHz. |
| 8 (SDA) | I²C Data I/O | Bidirectional open-drain data line; shares bus with other I²C peripherals; requires external pull-up. |
| 9 (EN) | Enable Control | Active-high logic input; 0.4V max low threshold ensures reliable disable under weak drive conditions. |
| 10 (PG) | Power-Good Output | Open-drain status signal; asserts high when VOUT ≥ 91% of target; used for sequencing downstream regulators. |
| 11 (VOUT) | Remote Sense / Discharge Path | Connects directly to load for accurate regulation; internal 10 Ω discharge path activates when EN = GND. |
| 12 (AGND) | Analog Ground | Reference ground for feedback and control circuitry; must tie to quiet ground plane near output capacitor. |
| 17 (EP) | Exposed Thermal Pad | Internally connected to PGND; requires ≥4 thermal vias to inner ground plane for thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Programmability | Full configuration (VOUT, slew rate, ON time, current limit, soft-start, discharge enable) without external components. |
| HyperLight Load™ Mode | Adaptive frequency reduction at light loads maintains >85% efficiency down to 1 mA, extending battery life. |
| Safe Startup with Pre-Bias | Enables reliable turn-on into pre-charged output rails (e.g., hot-swap or multi-rail sequencing) without reverse current. |
| Latch-Off Fault Protection | Thermal and overcurrent faults trigger non-recoverable shutdown until EN cycle or reset - prevents thermal runaway. |
| 100% Duty Cycle Operation | Extends usable battery range by maintaining regulation down to ~2.5V input when VOUT = 0.9V. |
| Pin Compatibility | Footprint- and function-compatible with MIC23650 - allows upgrade path without PCB redesign. |
Applications
| FPGA Core Power | SSD Controller Rail |
|---|---|
|
Use Scenario: Powers 0.9V core logic of Xilinx Artix-7 or Intel MAX 10 FPGAs in portable test equipment. IC Role / Device Role / Timing Role: Primary buck converter delivering regulated 0.9V at up to 6A peak with <10 µs transient response. Use Value: I²C programmability enables dynamic voltage scaling during FPGA reconfiguration; ±1.5% accuracy ensures timing margin compliance. |
Use Scenario: Supplies 0.9V VCCIO rail for NVMe SSD controllers in ultrabooks and edge AI gateways. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator handling burst currents during NAND flash write operations. Use Value: 6A peak capability and ultra-fast load transient response prevent brownout during 500 ns write pulses. |
| Li-ion Portable Systems | Multi-Rail Sequencing |
|
Use Scenario: Main SoC core supply in handheld medical monitors powered by single-cell 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Step-down regulator operating from 4.2V (fully charged) down to 2.8V (end-of-discharge) with 100% duty cycle. Use Value: 1.5 µA shutdown current and HyperLight Load™ extend runtime in standby; UVLO at 2.225V prevents unsafe deep discharge. |
Use Scenario: First-stage regulator in triple-rail power system where its PG output controls enable timing of secondary LDOs. IC Role / Device Role / Timing Role: Sequencing master using open-drain PG to assert enable signals with 65 µs blanking to avoid false triggers. Use Value: Precise 91% PG threshold and 4% hysteresis ensure deterministic startup/shutdown order across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC23656-HAYFT-TR | Default output voltage = 1.0V; identical pinout, I²C interface, and 10A current limit. | Used where 1.0V startup is required for specific ASIC families (e.g., certain ARM Cortex-A series). | Select when system firmware expects 1.0V on first power-up before I²C reprogramming. |
| MIC23650YMT-TR | No I²C interface; fixed 0.6V output; same 16-pin FTQFN package and 6A rating. | Targeted at cost-sensitive, static-voltage applications without dynamic configuration needs. | Choose for simplified BOM and layout where voltage flexibility is unnecessary and firmware overhead must be minimized. |
Compared with MIC23656-HAYFT-TR and MIC23650YMT-TR, the MIC23656-FAYFT-TR uniquely balances factory-safe 0.9V startup, full I²C configurability, and 10A fault robustness-making it optimal for FPGA/SSD platforms requiring both reliability and runtime adaptability.
Availability
MIC23656-FAYFT-TR is available at Aetrix Electronics and suitable for FPGA core power, SSD controller rails, and single-cell Li-ion portable systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC23656-FAYFT-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 Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, serving automotive, industrial, and communications markets with vertically integrated silicon and software solutions.
The MIC23656 product line delivers highly integrated, I²C-programmable DC-DC converters optimized for low-voltage, high-transient FPGA, ASIC, and SSD applications demanding precision, efficiency, and seamless system integration.
FAQ
What is the default output voltage of the MIC23656-FAYFT-TR at power-up?
The MIC23656-FAYFT-TR powers up with a factory-programmed default output voltage of 0.9V. This value is set by laser trimming and remains active until modified via I²C register writes. The 0.9V level provides safe startup for common low-voltage FPGA and ASIC cores while allowing subsequent dynamic adjustment to higher or lower values within the 0.6V–1.28V range using 5 mV resolution.
Does the MIC23656-FAYFT-TR support remote voltage sensing?
Yes, the MIC23656-FAYFT-TR supports true remote sensing via the dedicated VOUT pin (Pin 11), which connects directly to the load point to compensate for PCB trace IR drop. This pin also serves as the internal discharge path (10 Ω) when EN is pulled low, ensuring controlled output collapse without external circuitry.
Can the MIC23656-FAYFT-TR operate with input voltage below 2.4V?
No - the MIC23656-FAYFT-TR has a hard undervoltage lockout (UVLO) threshold of 2.225V (typical), with hysteresis of 153 mV. Operation below 2.4V input is outside specification; the device will shut down and remain disabled until PVIN rises above ~2.38V. This ensures stable regulation and prevents erratic behavior during battery depletion.
What thermal protection mechanisms does the MIC23656-FAYFT-TR implement?
The MIC23656-FAYFT-TR includes latch-off thermal shutdown at 165°C (TSHDN) with 22°C hysteresis, plus a thermal warning threshold at 118°C (TThWrn). When temperature exceeds 165°C, the device disables switching and holds shutdown until EN is cycled. Four consecutive thermal warnings trigger latch-off, preventing intermittent overheating in poorly ventilated enclosures.
Is the MIC23656-FAYFT-TR pin-compatible with other members of the MIC23656 family?
Yes - all MIC23656 variants (including MIC23656-FAYFT-TR, MIC23656-HAYFT-TR, and MIC23656-YFT-TR) share identical 16-pin FTQFN packaging, pinout, and mechanical footprint. This enables direct substitution in existing layouts when changing default output voltage or current limit settings, provided firmware is updated to match the new part's I²C configuration defaults.
MIC23656-FAYFT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 16-PowerUFQFN
- 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):
- 2.4V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.28V
- Current - Output:
- 6A
- Frequency - Switching:
- 1.6MHz, 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-FTQFN (2.5x2.5)
MIC23656-FAYFT-TR FAQ
1.How can I place an order for MIC23656-FAYFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23656-FAYFT-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 MIC23656-FAYFT-TR reliable?
The price and inventory of MIC23656-FAYFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23656-FAYFT-TR is usually 5 days.
3.What payment methods are accepted for MIC23656-FAYFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23656-FAYFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23656-FAYFT-TR?
MIC23656-FAYFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23656-FAYFT-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 MIC23656-FAYFT-TR?
For technical support, including MIC23656-FAYFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23656-FAYFT-TR requirements.
6.How does Aetrix verify that MIC23656-FAYFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23656-FAYFT-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 MIC23656-FAYFT-TR meets industry standards.
7.What is the process for return or replacement of MIC23656-FAYFT-TR?
All MIC23656-FAYFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23656-FAYFT-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 MIC23656-FAYFT-TR part is unused and in its original packaging.
Return procedure for MIC23656-FAYFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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