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Microchip Technology MIC23656-SAYFT-TR
- Part No.:
- MIC23656-SAYFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-PowerUFQFN
- Datasheet:
-
MIC23656-SAYFT-TR.pdf
- Description:
- IC REG BUCK PROG 6A 16FTQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC23656-SAYFT-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 to 5.5V input, delivers 1.0V default output at power-up, supports 10 mV/20 mV programmable resolution across 0.6–3.84V range, and integrates latch-off thermal/current protection - used for FPGA core rail sequencing in SSD and portable Li-ion systems.
For engineers reviewing the MIC23656-SAYFT-TR datasheet, MIC23656-SAYFT-TR pinout, MIC23656-SAYFT-TR application, or MIC23656-SAYFT-TR equivalent, key selection criteria include its 1.5% output voltage accuracy over temperature, 1.5 µA shutdown current, 100% duty-cycle low-dropout operation, and I²C-compatible 3.4 MHz interface for dynamic voltage scaling in space-constrained embedded power designs.
Technical Context
The MIC23656-SAYFT-TR implements adaptive Constant-On-Time (COT) control with HyperLight Load™ mode to maintain ultra-fast transient response while achieving up to 95% efficiency at light loads. Its internal 8-bit DAC enables precise output voltage programming, and the dual-range resolution (10 mV from 0.6V–1.28V; 20 mV from 1.28V–3.84V) is specific to the SAYFT variant.
It features latch-off thermal shutdown at 165°C with 22°C hysteresis, programmable enable delay (0.25–3 ms), and integrated 10 Ω output discharge path activated on EN=LOW. The device uses separate PGND and AGND pins, with SW node routed to an external inductor and VOUT configured for remote sensing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - supports single-cell Li-ion battery operation with UVLO at 2.225V. |
| Output Current | 6A pulsed - peak capability for FPGA/DSP core rails under transient load steps. |
| Output Voltage Accuracy | ±1.5% over line/load/temperature - ensures stable logic supply within JEDEC spec for 1.0V core domains. |
| I²C Interface Speed | Up to 3.4 MHz - enables real-time voltage reconfiguration without interrupting system operation. |
| Shutdown Supply Current | 1.5 µA typical - minimizes battery drain during deep sleep modes in portable SSDs. |
| Thermal Shutdown | Latch-off at 165°C with 22°C hysteresis - prevents thermal runaway in sealed enclosures. |
| Default Output Voltage | 1.0V at power-up - safe startup level for ASIC/FPGA cores before I²C programming. |
Pinout & Package
The MIC23656-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) internally connected to PGND. This package supports high-power density layouts and requires thermal vias to PCB ground plane per Microchip layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1, 16) | Switch Node | High-current connection to external inductor; must be routed with short, wide traces to minimize EMI and switching losses. |
| PGND (Pins 2, 3, 13, 14, 15) | Power Ground | Return path for high-side/low-side MOSFETs and bulk capacitors; requires dedicated low-impedance copper pour separate from AGND. |
| PVIN (Pins 4, 5) | Main Input Supply | Connects to 2.4–5.5V source; requires local 10 µF ceramic capacitor placed adjacent to pins. |
| SVIN (Pin 6) | Analog Input Supply | Provides bias for internal reference/control circuits; decoupled with 1.0 µF ceramic cap to AGND. |
| SCL (Pin 7) | I²C Clock Input | Open-drain slave clock input; compatible with standard/fast/high-speed I²C buses up to 3.4 MHz. |
| SDA (Pin 8) | I²C Data I/O | Bidirectional open-drain data line; shares bus with other I²C peripherals using pull-up resistors. |
| EN (Pin 9) | Enable Control | Active-high logic input; 0.4V max low threshold ensures compatibility with 1.8V/3.3V GPIOs. |
| PG (Pin 10) | Power Good Output | Open-drain status signal asserting high when VOUT ≥91% of target; used for power sequencing with external pull-up. |
| VOUT (Pin 11) | Remote Sense / Discharge Path | Connects directly to load point for accurate regulation; also enables internal 10 Ω discharge to PGND when disabled. |
| AGND (Pin 12) | Analog Ground | Reference for feedback and control circuitry; must be tied to clean ground plane near output capacitor. |
| EP (Pin 17) | Exposed Thermal Pad | Internally connected to PGND; requires ≥4 thermal vias to inner ground layer for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| I²C Programmable Output Voltage | 0.6–1.28V @ 10 mV steps + 1.28–3.84V @ 20 mV steps - enables fine-grained DVFS for multi-voltage SoCs. |
| HyperLight Load™ Mode | Adaptive frequency reduction at light loads - maintains >90% efficiency down to 1 mA without requiring external compensation. |
| Safe Start-Up with Pre-Biased Output | Controlled ramp even when VOUT is pre-charged - prevents reverse current into powered-down downstream circuits. |
| 100% Duty-Cycle Operation | Enables dropout-free regulation as input falls to VOUT - extends runtime in battery-powered systems down to 1.0V input. |
| Latch-Off Fault Protection | Simultaneous thermal and current limit latching - eliminates need for external watchdog timers in safety-critical applications. |
Applications
| SSD Power Management | FPGA Core Rail Sequencing |
|---|---|
|
Use Scenario: Powering NAND flash controllers and DRAM buffers in M.2 NVMe SSDs with tight thermal envelopes. IC Role / Device Role / Timing Role: Primary 1.0V core regulator delivering up to 6A peak current with I²C-controlled voltage scaling during low-power states. Use Value: 1.5 µA shutdown current and 100% duty cycle extend battery-backed write-cache hold time by >2× versus fixed-output alternatives. |
Use Scenario: Supplying configurable core voltage to Xilinx Artix-7 or Intel Cyclone V FPGAs during configuration and runtime. IC Role / Device Role / Timing Role: Synchronous buck converter with remote sensing and programmable soft-start for controlled power-up timing. Use Value: ±1.5% output accuracy and 65 µs PG blanking ensure reliable configuration lock and eliminate false power-fail assertions. |
| Portable Li-ion Systems | Low-Voltage ASIC Power |
|
Use Scenario: Regulating core voltage in handheld medical devices powered by single-cell 3.0–4.2V Li-ion batteries. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating across full battery discharge curve with minimal quiescent draw. Use Value: 95% peak efficiency and 2.4V minimum VIN allow >15% longer runtime compared to 3.3V LDO-based solutions. |
Use Scenario: Delivering precision 0.9–1.2V supplies to custom ASICs in industrial edge nodes with strict thermal budgets. IC Role / Device Role / Timing Role: I²C-configurable DC/DC with latch-off fault handling and thermal warning flag for predictive maintenance. Use Value: 165°C thermal shutdown with 22°C hysteresis prevents thermal damage while enabling firmware-triggered graceful shutdown. |
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 | Same package and pinout; default 1.0V output but 5 mV resolution (0.6–1.28V only); 10 A high-side current limit. | Optimized for higher-current FPGA rails where finer 5 mV granularity below 1.28V is required. | Select HAYFT if 5 mV resolution across full 0.6–1.28V range is mandatory and 3.84V capability is unnecessary. |
| TPS62864DLCR | TI 6A buck with I²C interface; 0.4–1.956V range, 6.25 mV step; no 100% duty cycle; 1.2 µA shutdown current. | Targets lower-voltage AI accelerators; lacks latch-off thermal protection and output discharge path. | Choose TPS62864DLCR only if system requires sub-1.0V outputs and can accept reduced fault coverage and no active discharge. |
Compared with MIC23656-HAYFT, the MIC23656-SAYFT-TR trades 5 mV resolution for extended 3.84V range and coarser 10/20 mV steps - making it suitable for hybrid SoC+peripheral rail designs. Versus TPS62864DLCR, it offers superior thermal robustness, true 100% duty cycle, and integrated discharge - critical for battery longevity and system reliability.
Availability
MIC23656-SAYFT-TR is available at Aetrix Electronics and suitable for SSD power management, FPGA core rail sequencing, and portable Li-ion systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC23656-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 Inc. is a leading provider of microcontrollers, analog components, 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 step-down regulators optimized for low-voltage, high-efficiency power delivery in space-constrained embedded systems - especially where dynamic voltage scaling and thermal resilience are critical.
FAQ
What is the default output voltage of the MIC23656-SAYFT-TR at power-up?
The MIC23656-SAYFT-TR powers up with a factory-programmed default output voltage of 1.0V. This safe startup level allows immediate system operation before I²C reprogramming. The MIC23656-SAYFT-TR supports subsequent adjustment to any value between 0.6V and 3.84V via its 8-bit DAC register, using 10 mV steps up to 1.28V and 20 mV steps thereafter.
Does the MIC23656-SAYFT-TR support 100% duty-cycle operation, and what is its design impact?
Yes, the MIC23656-SAYFT-TR supports true 100% duty-cycle operation, allowing continuous conduction when input voltage approaches output voltage. This feature extends usable battery life in single-cell Li-ion applications by maintaining regulation down to VIN = VOUT, eliminating dropout-related brownouts. The MIC23656-SAYFT-TR achieves this by latching the high-side switch on above ~92% duty cycle until VOUT drops 4% below target.
How does the MIC23656-SAYFT-TR handle output discharge when disabled?
When the EN pin is pulled low, the MIC23656-SAYFT-TR actively discharges the output through an internal 10 Ω resistor connected between VOUT and PGND - provided the output discharge feature is enabled via I²C CTRL2 register. This ensures rapid, controlled discharge to prevent floating voltages that could cause unintended behavior in downstream circuitry. The MIC23656-SAYFT-TR's discharge path is integrated and requires no external components.
What I²C address does the MIC23656-SAYFT-TR use, and is it accessible during shutdown?
The MIC23656-SAYFT-TR uses a fixed 7-bit I²C slave address of 0x5B. Crucially, the I²C interface remains fully functional even when EN = LOW, as long as PVIN exceeds the 2.225V UVLO threshold. This allows housekeeping MCUs to preconfigure output voltage, slew rate, and protection thresholds before enabling power delivery - a capability confirmed in the MIC23656-SAYFT-TR functional description and register map.
What thermal protection mechanisms are implemented in the MIC23656-SAYFT-TR?
The MIC23656-SAYFT-TR incorporates dual thermal safeguards: immediate latch-off shutdown at 165°C junction temperature and a thermal warning flag asserted at 118°C. It also features 22°C hysteresis to prevent oscillation near trip point. Unlike simpler thermal foldback schemes, the MIC23656-SAYFT-TR's latch-off behavior requires manual reset via EN toggle or power cycle - ensuring fault conditions are acknowledged before resuming operation.
MIC23656-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:
- 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-SAYFT-TR FAQ
1.How can I place an order for MIC23656-SAYFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23656-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 MIC23656-SAYFT-TR reliable?
The price and inventory of MIC23656-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 MIC23656-SAYFT-TR is usually 5 days.
3.What payment methods are accepted for MIC23656-SAYFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23656-SAYFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23656-SAYFT-TR?
MIC23656-SAYFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23656-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 MIC23656-SAYFT-TR?
For technical support, including MIC23656-SAYFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23656-SAYFT-TR requirements.
6.How does Aetrix verify that MIC23656-SAYFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23656-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 MIC23656-SAYFT-TR meets industry standards.
7.What is the process for return or replacement of MIC23656-SAYFT-TR?
All MIC23656-SAYFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23656-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 MIC23656-SAYFT-TR part is unused and in its original packaging.
Return procedure for MIC23656-SAYFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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