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Microchip Technology MIC33M356-FAYMP-TR
- Part No.:
- MIC33M356-FAYMP-TR
- Manufacturer:
- Microchip Technology
- Package:
- 24-PowerFQFN
- Datasheet:
-
MIC33M356-FAYMP-TR.pdf
- Description:
- IC REG 3A 24QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC33M356-FAYMP-TR from Microchip Technology is an I²C-programmable, integrated-inductor synchronous buck power module delivering 3A output current with ±1.5% voltage accuracy across line/load/temperature. It operates from 2.4V–5.5V input, supports 0.6V–1.28V output at 5 mV resolution, and features HyperLight Load® mode for >95% efficiency at light loads. Used in SSDs and low-voltage FPGA/DSP core rails.
For engineers reviewing the MIC33M356-FAYMP-TR datasheet, MIC33M356-FAYMP-TR pinout, MIC33M356-FAYMP-TR application, or MIC33M356-FAYMP-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, Power Good open-drain signaling, and compatibility with MIC33M350 PCB layouts.
Technical Context
The MIC33M356-FAYMP-TR implements Constant On-Time (COT) control with adaptive on-time adjustment to maintain near-constant switching frequency in CCM while enabling ultra-fast transient response. Its HyperLight Load® mode dynamically reduces switching frequency under light load to minimize switching losses.
It integrates a 0.47 µH inductor and dual MOSFETs (RDS(on)-HS = 30 mΩ typ., RDS(on)-LS = 16 mΩ typ.) within a thermally enhanced 24-pin QFN. The I²C interface (up to 3.4 MHz) allows real-time reconfiguration of output voltage, slew rate, on-time, high-side current limit (3.5A/5A), and enable delay without interrupting operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - Supports single-cell Li-ion battery systems with full discharge margin and 100% duty cycle low-dropout operation. |
| Output Current | 3A continuous - Delivers regulated power to FPGA cores, ASIC logic, or SSD controller ICs without external heatsinking. |
| Output Voltage Accuracy | ±1.5% over line/load/temperature - Ensures stable core voltage compliance for sub-1V digital logic domains. |
| I²C Resolution & Range | 0.6V–1.28V at 5 mV steps - Enables precise fine-tuning of processor core voltages (e.g., 0.85V, 0.95V) via host MCU. |
| Shutdown Current | 1.5 µA typical - Minimizes battery drain during system sleep states in portable applications. |
| Thermal Protection | Latch-off at +165°C with +22°C hysteresis - Prevents thermal runaway and enables safe recovery after fault clearance. |
| Power Good Output | Open-drain PG with 91% threshold and 4% hysteresis - Provides reliable sequencing signal for multi-rail power systems. |
Pinout & Package
Package: 24-lead, 3.0 mm × 4.5 mm × 1.8 mm QFN with exposed thermal pads (EP1_PGND, EP2_PGND, EP_SW, EP_OUT) for enhanced thermal dissipation. Operating junction temperature range: –40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 1,2,3,10,11) | Power Ground return path | Carries high-frequency switching current from internal MOSFETs and output capacitor; must be connected to low-impedance ground plane. |
| SW (Pins 4–9) | Switch node | High dv/dt connection to internal high/low-side MOSFETs and integrated inductor; requires short, wide PCB traces to minimize EMI. |
| PVIN (Pin 17) | Main power input | Supplies high-side P-MOSFET; requires local 47 µF ceramic input capacitor referenced to PGND. |
| SVIN (Pin 18) | Analog supply input | Bias source for control circuitry; internally connected to PVIN via 10 Ω resistor; requires 1 µF ceramic decoupling to AGND. |
| SCL / SDA (Pins 19–20) | I²C interface | Slave-mode communication (7-bit address 0x5B); supports up to 3.4 MHz High-Speed mode for fast configuration updates. |
| EN (Pin 21) | Enable control | Active-high logic input; programmable startup delay (0.25–3 ms); pulls device into 1.5 µA shutdown state when low. |
| PG (Pin 22) | Power Good indicator | Open-drain output asserting high when VOUT ≥ 91% of target; used for rail sequencing and fault monitoring. |
| VOUT (Pin 23) | Remote sense & discharge path | Connects near output capacitor for accurate regulation; enables active discharge via internal 10 Ω resistor when disabled. |
| OUT (Pins 12–16) | Power output terminals | Low-impedance connection points for output capacitor and load; electrically tied to EP_OUT thermal pad. |
| AGND (Pin 24) | Analog reference ground | Reference for feedback and control circuits; must be routed separately from PGND to avoid noise coupling into regulation loop. |
Key Features
| Feature | Design Value |
|---|---|
| I²C programmability | Real-time adjustment of output voltage, slew rate, on-time, current limit, and enable delay-enabling dynamic voltage scaling and system-level power optimization. |
| HyperLight Load® mode | Automatic transition to discontinuous conduction mode at light loads, reducing switching losses and achieving >95% efficiency down to 1 mA output current. |
| Safe start-up with pre-biased output | Enables reliable turn-on into existing output voltage (e.g., hot-swap or multi-phase sequencing), preventing reverse current flow or latch-up. |
| Integrated inductor & MOSFETs | Reduces BOM count by eliminating external inductor and discrete FETs; simplifies layout and improves EMI performance versus discrete solutions. |
| Latch-off fault protection | Hard shutdown on overtemperature (4 consecutive cycles) or overcurrent, preventing sustained fault conditions and ensuring system safety. |
| CISPR32 Class B emissions compliance | Meets radiated emission limits without external shielding or complex filtering-reducing design validation time for end-equipment certification. |
Applications
| Solid-State Drive (SSD) Core Power | FPGA Core Voltage Regulation |
|---|---|
Use Scenario: Powers NAND flash controller and DRAM cache in M.2 NVMe SSDs operating from 3.3V or 5V bus. IC Role / Device Role / Timing Role: Primary 3A buck regulator supplying 0.9V core rail with I²C-adjustable voltage for performance vs. power trade-offs. Use Value: ±1.5% accuracy ensures stable operation across temperature; 1.5 µA shutdown current extends battery-backed write-cache retention time. |
Use Scenario: Supplies configurable core voltage to Xilinx Artix-7 or Intel Cyclone V FPGA banks requiring precise sub-1V rails. IC Role / Device Role / Timing Role: I²C-programmable power module enabling dynamic voltage/frequency scaling (DVFS) during partial reconfiguration. Use Value: 5 mV output resolution allows exact match to FPGA VCCINT spec; ultra-fast transient response prevents logic errors during burst activity. |
| Ultrabook CPU/GPU Core Rail | Low-Voltage ASIC Power Delivery |
Use Scenario: Delivers 0.9V/3A to embedded microcontroller or GPU subsystem in fanless ultrabooks powered by single-cell Li-ion. IC Role / Device Role / Timing Role: High-efficiency step-down module with HyperLight Load® mode extending battery runtime during idle/sleep states. Use Value: 2.4V minimum input supports full battery discharge; 100% duty cycle operation maintains regulation down to 2.4V input. |
Use Scenario: Powers custom SoC or AI accelerator ASIC with tight voltage tolerance requirements in edge computing modules. IC Role / Device Role / Timing Role: Precision-regulated power source with remote sensing (VOUT pin) compensating for PCB IR drop in dense layouts. Use Value: Remote sense capability maintains ±1.5% accuracy at point-of-load; PG output enables coordinated power-up with companion PMIC rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC33M350-FAYMP-TR | Same pinout and package; lacks I²C interface and HyperLight Load® mode; fixed 0.9V output. | Used where programmability is unnecessary and cost reduction is prioritized over dynamic voltage control. | Select MIC33M350-FAYMP-TR only if I²C configuration, slew rate control, or light-load efficiency are not required. |
| TPS62864A0RQYR | 3A buck converter with I²C (0x60), 0.4V–1.95V output, 1.8V–5.5V input, but no integrated inductor. | Requires external inductor and more passive components; better suited for designs needing higher flexibility in inductance value or EMI tuning. | Choose TPS62864A0RQYR when board space allows discrete magnetics and tighter EMI control is needed over module-level integration. |
Compared with MIC33M356-FAYMP-TR, MIC33M350-FAYMP-TR sacrifices programmability and efficiency modes for lower BOM cost, while TPS62864A0RQYR trades integration for design flexibility-making MIC33M356-FAYMP-TR optimal for space-constrained, battery-powered systems demanding both precision and configurability.
Availability
MIC33M356-FAYMP-TR is available at Aetrix Electronics and suitable for solid-state drives, ultrabooks, and FPGA power delivery systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC33M356-FAYMP-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 consumer markets with vertically integrated silicon and software solutions.
The MIC33M356 product line delivers fully integrated, I²C-programmable buck power modules targeting high-density portable and embedded systems where board space, thermal performance, and dynamic power control are critical.
FAQ
What is the default output voltage of the MIC33M356-FAYMP-TR at power-up?
The MIC33M356-FAYMP-TR powers up with a default output voltage of 0.9V, as specified in Microchip's ordering information table. This safe-start voltage is factory-programmed and can be immediately reconfigured via I²C without requiring EN cycling. The 0.9V default aligns with common FPGA and low-power processor core requirements, minimizing risk of overvoltage during initial boot.
Does the MIC33M356-FAYMP-TR support remote voltage sensing?
Yes, the MIC33M356-FAYMP-TR supports true remote voltage sensing via its dedicated VOUT pin (Pin 23), which connects directly to the feedback network near the load. This compensates for PCB trace resistance between the module and point-of-load, maintaining ±1.5% regulation accuracy even with 50 mΩ of IR drop. The VOUT pin also serves as the discharge path when EN is low.
Can the MIC33M356-FAYMP-TR operate with a 2.4V input supply?
Yes, the MIC33M356-FAYMP-TR supports input voltages as low as 2.4V and maintains regulation down to this level using 100% duty cycle operation. This enables full utilization of single-cell Li-ion batteries (2.7–4.2V nominal, 2.4V cutoff), extending runtime in portable SSDs and ultrabooks without brownout risk.
What protection features does the MIC33M356-FAYMP-TR include?
The MIC33M356-FAYMP-TR includes latch-off thermal shutdown (+165°C), latch-off overcurrent protection (3.5A/5A selectable), undervoltage lockout (2.225V typ.), Power Good fault detection, and hiccup-mode short-circuit response. All protections trigger hard shutdown with automatic recovery only after fault removal and reset-ensuring robust system-level reliability.
Is the MIC33M356-FAYMP-TR pin-compatible with other Microchip power modules?
Yes, the MIC33M356-FAYMP-TR shares identical 24-pin QFN footprint and pinout with the MIC33M350 series, enabling drop-in replacement in existing designs. This allows seamless migration from fixed-output to I²C-programmable regulation without PCB redesign-critical for product iteration and feature enhancement in volume production.
MIC33M356-FAYMP-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-PowerFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (3x4.5)
MIC33M356-FAYMP-TR FAQ
1.How can I place an order for MIC33M356-FAYMP-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33M356-FAYMP-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 MIC33M356-FAYMP-TR reliable?
The price and inventory of MIC33M356-FAYMP-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33M356-FAYMP-TR is usually 5 days.
3.What payment methods are accepted for MIC33M356-FAYMP-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33M356-FAYMP-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33M356-FAYMP-TR?
MIC33M356-FAYMP-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33M356-FAYMP-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 MIC33M356-FAYMP-TR?
For technical support, including MIC33M356-FAYMP-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33M356-FAYMP-TR requirements.
6.How does Aetrix verify that MIC33M356-FAYMP-TR is sourced from the original manufacturer or authorized distributors?
All MIC33M356-FAYMP-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 MIC33M356-FAYMP-TR meets industry standards.
7.What is the process for return or replacement of MIC33M356-FAYMP-TR?
All MIC33M356-FAYMP-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC33M356-FAYMP-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 MIC33M356-FAYMP-TR part is unused and in its original packaging.
Return procedure for MIC33M356-FAYMP-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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