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Microchip Technology MIC23356-SAYFT-TR
- Part No.:
- MIC23356-SAYFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-PowerUFQFN
- Datasheet:
-
MIC23356-SAYFT-TR.pdf
- Description:
- IC REG BUCK PROG 3A 16FTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,604
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Product details
Overview
MIC23356-SAYFT-TR from Microchip Technology is a 3A synchronous step-down DC-DC converter with I²C programmability, operating from 2.4V to 5.5V input and delivering 1.0V default output (configurable 0.6–3.84V), ±1.5% voltage accuracy, and 95% peak efficiency. It serves as a core power supply for FPGA, ASIC, and SSD rails requiring fast transient response and precise sequencing.
For engineers reviewing the MIC23356-SAYFT-TR datasheet, MIC23356-SAYFT-TR pinout, MIC23356-SAYFT-TR application, or MIC23356-SAYFT-TR equivalent, this page delivers verified technical context, I²C-configurable parameters (voltage, slew rate, current limit), thermal latch-off protection, Power Good signaling, and 16-pin FTQFN package details - all confirmed from Microchip's DS20006130A.
Technical Context
The MIC23356-SAYFT-TR implements Constant-ON-Time (COT) control with HyperLight Load™ mode, enabling ultra-fast load transient response (<80 µs) and high light-load efficiency. Its adaptive COT architecture maintains near-constant switching frequency in continuous conduction mode while automatically reducing frequency under light loads.
I²C interface (up to 3.4 MHz) provides full configuration of output voltage (0.6–1.28V @ 10 mV step; 1.28–3.84V @ 20 mV step), slew rate (100–3710 µs/V), enable delay (0.25–3 ms), high-side current limit (3.5–5 A), and output discharge. Fault reporting includes latch-off thermal shutdown (165°C) and hiccup-mode overcurrent protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - supports single-cell Li-ion battery operation and wide industrial input rails. |
| Output Current | 3A continuous - sufficient for FPGA core, SSD controller, or low-voltage ASIC power domains. |
| Output Voltage Accuracy | ±1.5% over line/load/temperature - ensures stable logic rail compliance without external trimming. |
| I²C Resolution (SAYFT) | 10 mV (0.6–1.28V) / 20 mV (1.28–3.84V) - enables fine-grained voltage margining and multi-rail optimization. |
| Shutdown Current | 1.5 µA typical - minimizes battery drain in portable systems during sleep states. |
| Thermal Protection | Latch-off at 165°C with 22°C hysteresis - prevents thermal runaway in compact enclosures. |
| Power Good Output | Open-drain PG with 91% threshold & 4% hysteresis - enables reliable power sequencing with external regulators. |
Pinout & Package
The MIC23356-SAYFT-TR is housed in a thermally efficient 16-lead 2.5 mm × 2.5 mm × 0.55 mm thin FTQFN package 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 internal MOSFETs; requires short, wide PCB trace to inductor. |
| 2, 3, 13, 14, 15 (PGND) | Power Ground | Low-impedance return path for power stage; must be separated from AGND to avoid noise coupling. |
| 4, 5 (PVIN) | Main Input Supply | 2.4–5.5V input source for high-side P-MOSFET; requires local ceramic decoupling. |
| 6 (SVIN) | Analog Reference Supply | Internally connected to PVIN via 10Ω; powers control circuitry and requires dedicated 1.0 µF capacitor. |
| 7 (SCL) | I²C Clock Input | Slave-mode clock input supporting up to 3.4 MHz (high-speed mode); no internal pull-up. |
| 8 (SDA) | I²C Data I/O | Open-drain bidirectional data line; requires external pull-up resistor. |
| 9 (EN) | Enable Control | Active-high logic input; 1.2V min high-level threshold; enables programmable startup delay (0.25–3 ms). |
| 10 (PG) | Power Good Output | Open-drain status signal asserting when VOUT ≥91% of target; deasserts at ≤87% with 65 µs blanking. |
| 11 (VOUT) | Remote Sense & Discharge | Connects directly to output capacitor for precision regulation; internally discharges VOUT via 10Ω when EN = GND. |
| 12 (AGND) | Analog Ground | Reference ground for feedback and control circuits; must connect to quiet ground plane near output cap. |
| 17 (EP) | Exposed Thermal Pad | Electrically tied to PGND; requires multiple thermal vias to inner ground plane for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Programmability | Full real-time configuration of output voltage, slew rate, enable delay, current limit, and discharge control without re-spinning hardware. |
| HyperLight Load™ Mode | Automatic transition to diode-emulation mode at light loads, reducing switching losses and maintaining >85% efficiency down to 1 mA. |
| Safe Start-Up | Pre-biased output compatibility and controlled soft-start prevent reverse current flow and limit inrush during hot-plug events. |
| 100% Duty Cycle Operation | Enables low-dropout regulation (e.g., 5V→4.8V) extending runtime in battery-powered systems near end-of-discharge. |
| Multiple Fault Reporting | I²C-accessible status registers report thermal warning (118°C), overtemperature latch-off (165°C), and overcurrent hiccup cycles. |
Applications
| FPGA Core Power | SSD Controller Rail |
|---|---|
Use Scenario: Powering Xilinx Artix-7 or Intel Cyclone V FPGA core logic with dynamic DVFS voltage scaling. IC Role / Device Role / Timing Role: Primary 3A buck regulator delivering dynamically adjusted 0.85–1.2V core voltage via I²C commands from system MCU. Use Value: ±1.5% output accuracy and ultra-fast transient response (<80 µs) maintain timing margins during sudden logic state changes. |
Use Scenario: Supplying 1.2V or 1.8V to NAND flash controller in enterprise-grade SSD modules. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with Power Good sequencing to coordinate with DRAM and PCIe PHY rails. Use Value: 95% peak efficiency and 1.5 µA shutdown current extend endurance in always-on storage subsystems. |
| Portable Li-ion System Rail | Low-Voltage ASIC Power |
Use Scenario: Regulating 3.3V or 2.5V from single-cell 4.2V Li-ion battery in handheld medical or IoT devices. IC Role / Device Role / Timing Role: Main system power IC with 100% duty cycle capability to sustain output as battery discharges below 3.6V. Use Value: Wide 2.4–5.5V input range and latch-off thermal protection ensure safe operation across full battery voltage curve. |
Use Scenario: Delivering 0.9V to 1.0V to custom ASICs in edge AI accelerators or sensor fusion processors. IC Role / Device Role / Timing Role: Precision-configurable buck converter with remote sensing (VOUT pin) compensating for PCB IR drop. Use Value: 10 mV I²C resolution and ±1.5% accuracy enable tight voltage binning and process corner compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC23356-HAYFT | Same 16-pin FTQFN package and I²C interface; default 1.0V output but 5 mV resolution (0.6–1.28V) vs. SAYFT's 10/20 mV steps. | Preferred where finer voltage granularity is required below 1.28V, e.g., advanced FPGA core tuning. | Select HAYFT if 5 mV resolution across full 0.6–1.28V range is mandatory; SAYFT offers extended 3.84V max for auxiliary rails. |
| TPS62864DRLR | 3A buck with I²C, 2.4–5.5V input, but fixed 1.0V output (non-programmable); 0.5% accuracy vs. ±1.5%; no output discharge. | Suitable for cost-sensitive, fixed-voltage applications lacking need for dynamic voltage scaling or sequencing. | Choose TPS62864DRLR only for static 1.0V rails where I²C configurability and discharge are unnecessary. |
Compared with MIC23356-HAYFT, the MIC23356-SAYFT-TR trades 5 mV resolution below 1.28V for extended 3.84V output capability and coarser 10/20 mV steps - making it better suited for multi-rail systems needing both core and I/O voltage flexibility. Versus TPS62864DRLR, it adds full I²C programmability and safety features at higher BOM complexity.
Availability
MIC23356-SAYFT-TR is available at Aetrix Electronics and suitable for FPGA power delivery, SSD controller supplies, and portable Li-ion system rails requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC23356-SAYFT-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, and power management ICs, with a focus on reliability, longevity, and embedded system integration.
The MIC23356 product line delivers highly integrated, I²C-programmable buck regulators targeting space-constrained, battery-powered, and high-performance digital systems requiring precision voltage control and robust fault management.
FAQ
What is the default output voltage of the MIC23356-SAYFT-TR at power-up?
The MIC23356-SAYFT-TR powers up with a default output voltage of 1.0V, as specified in Microchip's ordering information table. This value is factory-programmed and remains active until modified via the I²C interface. The MIC23356-SAYFT-TR supports subsequent reconfiguration to any value between 0.6V and 3.84V using its 8-bit DAC register, with 10 mV resolution up to 1.28V and 20 mV beyond.
Does the MIC23356-SAYFT-TR support output voltage discharge when disabled?
Yes, the MIC23356-SAYFT-TR includes an I²C-controllable output discharge feature that activates an internal 10Ω pull-down resistor between VOUT and PGND when EN is pulled low. This ensures rapid, controlled discharge of the output capacitor, preventing floating voltages and enabling safe re-enabling. The function is enabled by default in the SAYFT variant and can be toggled via the CTRL2 register.
What is the maximum I²C clock frequency supported by the MIC23356-SAYFT-TR?
The MIC23356-SAYFT-TR supports I²C communication up to 3.4 MHz in high-speed mode, as confirmed in the Electrical Characteristics table (DS20006130A, page 8). This allows rapid voltage updates and status reads without compromising system responsiveness. The device operates as an I²C slave at address 0x5B (7-bit), and the interface remains functional even when EN = GND, provided PVIN exceeds the UVLO threshold (2.225V typical).
How does the MIC23356-SAYFT-TR handle thermal overload conditions?
The MIC23356-SAYFT-TR implements latch-off thermal shutdown at 165°C (typical), with 22°C hysteresis to prevent oscillation. Once triggered, the device halts switching and holds shutdown until power cycling or reset. A thermal warning flag (118°C) is also reported via I²C status register, allowing firmware to initiate derating before critical shutdown. The MIC23356-SAYFT-TR's 2.5 mm × 2.5 mm FTQFN package with exposed thermal pad facilitates effective heat dissipation in dense layouts.
Is the MIC23356-SAYFT-TR pin-compatible with other members of the MIC2335x family?
Yes, the MIC23356-SAYFT-TR shares identical 16-pin FTQFN pinout and footprint with the MIC23350 and other MIC2335x variants, as explicitly stated in the General Description (DS20006130A, page 1). This enables drop-in replacement in existing designs - for example, upgrading from MIC23350 to MIC23356-SAYFT-TR adds I²C programmability and enhanced fault reporting without PCB revision.
MIC23356-SAYFT-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):
- 3.84V
- Current - Output:
- 3A
- 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)
MIC23356-SAYFT-TR FAQ
1.How can I place an order for MIC23356-SAYFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23356-SAYFT-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 MIC23356-SAYFT-TR reliable?
The price and inventory of MIC23356-SAYFT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23356-SAYFT-TR is usually 5 days.
3.What payment methods are accepted for MIC23356-SAYFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23356-SAYFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23356-SAYFT-TR?
MIC23356-SAYFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23356-SAYFT-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 MIC23356-SAYFT-TR?
For technical support, including MIC23356-SAYFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23356-SAYFT-TR requirements.
6.How does Aetrix verify that MIC23356-SAYFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23356-SAYFT-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 MIC23356-SAYFT-TR meets industry standards.
7.What is the process for return or replacement of MIC23356-SAYFT-TR?
All MIC23356-SAYFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23356-SAYFT-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 MIC23356-SAYFT-TR part is unused and in its original packaging.
Return procedure for MIC23356-SAYFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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