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Microchip Technology MIC23356-FAYFT-TR
- Part No.:
- MIC23356-FAYFT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 16-PowerUFQFN
- Datasheet:
-
MIC23356-FAYFT-TR.pdf
- Description:
- IC REG BUCK PROG 3A 16FTQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,322
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Product details
Overview
MIC23356-FAYFT-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 0.9V default output (5 mV resolution), ±1.5% voltage accuracy over line/load/temperature, and ultra-fast transient response via Constant-On-Time control with HyperLight Load™ mode. It serves as a core power supply for FPGA core rails in portable SSDs.
For engineers reviewing the MIC23356-FAYFT-TR datasheet, MIC23356-FAYFT-TR pinout, MIC23356-FAYFT-TR application, or MIC23356-FAYFT-TR equivalent, key selection criteria include I²C-configurable slew rate (0.2–3.2 ms/V), latch-off thermal/current protection, 1.5 µA shutdown current, 100% duty cycle capability, and compatibility with MIC23350-based layouts.
Technical Context
The MIC23356-FAYFT-TR implements adaptive Constant-On-Time (COT) control with HyperLight Load™ mode, enabling near-constant switching frequency in CCM while reducing frequency at light loads to boost efficiency. Its 8-bit DAC supports 0.6V–1.28V output programming in 5 mV steps, with factory-default 0.9V startup voltage.
It integrates high-side (30 mΩ typ.) and low-side (16 mΩ typ.) MOSFETs, features open-drain Power Good (PG) with 91% threshold and 4% hysteresis, and provides I²C slave address 0x5B for real-time voltage, slew rate, enable delay, and discharge control - all active even when EN = GND, provided SVIN > UVLO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V–5.5V: Supports single-cell Li-ion battery operation across full discharge curve. |
| Output Current | 3A continuous: Sustains full load without derating up to +125°C junction temperature. |
| Output Voltage Accuracy | ±1.5% over line/load/temperature: Ensures stable core rail compliance for FPGAs and ASICs. |
| I²C Interface Speed | Up to 3.4 MHz: Enables fast configuration during boot or dynamic voltage scaling (DVS). |
| Shutdown Current | 1.5 µA typical: Minimizes battery drain in system sleep states. |
| Thermal Protection | Latch-off at 165°C with 22°C hysteresis: Prevents thermal runaway in enclosed designs. |
| Power Good Threshold | 91% of VOUT rising, 87% falling: Provides reliable sequencing margin for multi-rail systems. |
Pinout & Package
Package: 16-lead 2.5 mm × 2.5 mm × 0.55 mm thin FTQFN with exposed thermal pad (EP), rated θJA = 45°C/W, operating junction temperature range –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 (SW) | Switch Node | High-current connection to external inductor; requires short, wide PCB trace to minimize EMI and conduction loss. |
| 2, 3, 13, 14, 15 (PGND) | Power Ground | Return path for high-side/low-side MOSFETs and input/output capacitors; must be separated from AGND to avoid noise coupling. |
| 4, 5 (PVIN) | Main Input Supply | Connects to 2.4–5.5V source; requires local ceramic capacitor to PGND for high-frequency decoupling. |
| 6 (SVIN) | Analog Input Supply | Bias for internal reference/control circuits; internally connected to PVIN via 10Ω resistor; requires 1.0 µF ceramic cap to AGND. |
| 7 (SCL) | I²C Clock Input | Slave-mode clock input; supports standard (100 kHz), fast (400 kHz), and high-speed (3.4 MHz) modes. |
| 8 (SDA) | I²C Data I/O | Open-drain bidirectional data line; requires external pull-up resistor; address 0x5B (7-bit). |
| 9 (EN) | Enable Input | Active-high logic control; 1.2V min high threshold; enables programmable 0.25/1/2/3 ms start delay. |
| 10 (PG) | Power Good Output | Open-drain status signal; asserts high when VOUT ≥ 91% target; deasserts at ≤87%; includes 65 µs blanking. |
| 11 (VOUT) | Remote Sense / Discharge Path | Connects directly to output capacitor for precision regulation; internal 10Ω discharge path activates when EN = GND. |
| 12 (AGND) | Analog Ground | Reference for feedback and control circuitry; must tie to clean ground plane, separate from PGND loop. |
| 17 (EP) | Exposed Thermal Pad | Internally connected to PGND; requires thermal vias to inner ground plane for effective heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| I²C-programmable output voltage | 0.6V–1.28V in 5 mV steps (default 0.9V), enabling precise core rail tuning without external resistors. |
| HyperLight Load™ mode | Adaptive frequency reduction at light loads maintains >90% efficiency down to 1 mA, critical for SSD standby power. |
| Slew rate control | Configurable 0.2–3.2 ms/V rise time prevents overshoot during dynamic voltage scaling in FPGA applications. |
| Safe start-up with pre-biased output | Enables hot-plug operation into existing bus voltage without reverse current or latch-up risk. |
| Output discharge on disable | Internal 10Ω pull-down discharges VOUT rapidly when EN = GND, ensuring known state before next power cycle. |
Applications
| Solid State Drive (SSD) Core Power | FPGA Core Rail Regulation |
|---|---|
Use Scenario: Powers NAND controller and DRAM interface in portable M.2 SSDs powered by single-cell Li-ion battery. IC Role / Device Role / Timing Role: Primary 3A buck regulator delivering stable 0.9V core voltage with I²C-adjustable slew rate for dynamic power management. Use Value: 100% duty cycle extends runtime at low battery voltage; ±1.5% accuracy ensures NAND timing margins are maintained. |
Use Scenario: Supplies configurable core voltage to Xilinx Artix-7 or Intel Cyclone V FPGA in embedded vision systems. IC Role / Device Role / Timing Role: I²C-controlled point-of-load regulator supporting multiple VCCINT profiles during partial reconfiguration. Use Value: Ultra-fast transient response (<100 µs recovery) prevents logic errors during burst computation; PG output sequences auxiliary rails. |
| Low-Voltage ASIC Power | Portable Industrial Sensor Hub |
Use Scenario: Powers 0.8–1.2V digital baseband ASIC in battery-operated IoT edge node with strict quiescent current budget. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with 1.5 µA shutdown current and programmable soft-start. Use Value: HyperLight Load™ sustains >85% efficiency at 100 µA load; I²C allows firmware-driven voltage optimization per sensor mode. |
Use Scenario: Delivers regulated 0.9V to ARM Cortex-M4 MCU and analog front-end in handheld diagnostic device. IC Role / Device Role / Timing Role: Main system regulator with thermal warning (118°C) and latch-off shutdown (165°C) for safety-critical operation. Use Value: Latch-off current limit (5A) protects against shorted sensor traces; PG signal validates power integrity before firmware boot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC23350-YFT | Same pinout, no I²C interface, fixed 0.6V output, lower current limit (3.5A), no slew rate or discharge control. | Used where cost-sensitive, static-voltage, non-sequenced power is sufficient; lacks dynamic configuration capability. | Select MIC23350-YFT only if I²C programmability, adjustable slew, or output discharge are unnecessary. |
| TPS628641RQYR | 3A buck with I²C, 0.4–1.95V output, 1.2% accuracy, but no latch-off thermal protection and 2.7–5.5V input range (no 2.4V support). | Preferred for higher-accuracy, lower-noise applications with external sequencing controllers; unsuitable for deep-discharge Li-ion. | Choose TPS628641RQYR when tighter voltage tolerance and lower ripple outweigh 2.4V start-up and robust fault latching. |
Compared with MIC23350-YFT and TPS628641RQYR, the MIC23356-FAYFT-TR uniquely combines 2.4V start-up, I²C-configurable slew/discharge, latch-off thermal/current protection, and MIC23350 pin compatibility - making it optimal for upgrade paths in space-constrained, battery-powered FPGA/ASIC systems requiring firmware-controlled power sequencing.
Availability
MIC23356-FAYFT-TR is available at Aetrix Electronics and suitable for solid-state drives, FPGA power delivery, and low-voltage ASIC applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MIC23356-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 is a leading provider of microcontrollers, analog devices, and power management ICs, with emphasis on reliability, longevity, and embedded system integration.
The MIC23356 belongs to Microchip's HyperLight Load™ synchronous buck regulator family, designed specifically for high-efficiency, dynamically configurable power delivery in portable and FPGA-centric applications.
FAQ
What is the default output voltage of the MIC23356-FAYFT-TR at power-up?
The MIC23356-FAYFT-TR powers up with a factory-programmed default output voltage of 0.9V. This value is set by the "FAYFT" suffix per Microchip's ordering table and remains active until modified via I²C. The device supports subsequent reprogramming to any value between 0.6V and 1.28V in 5 mV increments, preserving system stability during firmware-initiated voltage scaling.
Does the MIC23356-FAYFT-TR support output voltage discharge when disabled?
Yes, the MIC23356-FAYFT-TR includes an internal 10Ω output discharge path activated when EN = GND, provided the Output Discharge feature is enabled via I²C CTRL2 register. This ensures rapid VOUT collapse to near-zero volts, eliminating residual charge that could interfere with system reset or cause back-powering of downstream circuitry.
What is the maximum I²C clock frequency supported by the MIC23356-FAYFT-TR?
The MIC23356-FAYFT-TR supports I²C clock frequencies up to 3.4 MHz in high-speed mode. It operates as a slave device at 7-bit address 0x5B and retains full register accessibility - including output voltage, slew rate, and enable delay - regardless of EN pin state, as long as SVIN exceeds the 2.225V UVLO threshold.
How does the MIC23356-FAYFT-TR handle thermal overload conditions?
The MIC23356-FAYFT-TR implements latch-off thermal shutdown at +165°C junction temperature, with 22°C hysteresis. After triggering, the device remains disabled until power cycling or external reset. Unlike auto-retry architectures, this behavior prevents repeated stress on MOSFETs and inductors during sustained overheating - a critical safety feature in sealed industrial enclosures.
Is the MIC23356-FAYFT-TR pin-compatible with other members of the MIC2335x family?
Yes, the MIC23356-FAYFT-TR shares identical 16-pin FTQFN pinout and footprint with the MIC23350 series, enabling drop-in replacement in existing layouts. This compatibility simplifies migration from fixed-output to I²C-programmable regulation without PCB redesign, preserving layout integrity while adding dynamic voltage control and enhanced fault reporting.
MIC23356-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:
- 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-FAYFT-TR FAQ
1.How can I place an order for MIC23356-FAYFT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23356-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 MIC23356-FAYFT-TR reliable?
The price and inventory of MIC23356-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 MIC23356-FAYFT-TR is usually 5 days.
3.What payment methods are accepted for MIC23356-FAYFT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23356-FAYFT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23356-FAYFT-TR?
MIC23356-FAYFT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23356-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 MIC23356-FAYFT-TR?
For technical support, including MIC23356-FAYFT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23356-FAYFT-TR requirements.
6.How does Aetrix verify that MIC23356-FAYFT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23356-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 MIC23356-FAYFT-TR meets industry standards.
7.What is the process for return or replacement of MIC23356-FAYFT-TR?
All MIC23356-FAYFT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23356-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 MIC23356-FAYFT-TR part is unused and in its original packaging.
Return procedure for MIC23356-FAYFT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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