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Microchip Technology MIC33M656-SAYMP-TR
- Part No.:
- MIC33M656-SAYMP-TR
- Manufacturer:
- Microchip Technology
- Package:
- 53-PowerBFQFN Module
- Datasheet:
-
MIC33M656-SAYMP-TR.pdf
- Description:
- IC REG BUCK PROG 6A 53B1QFN
- Quantity:
- Payment:
- Shipping:
Inventory:235
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Product details
Overview
MIC33M656-SAYMP-TR from Microchip Technology is a 6A I²C-programmable synchronous buck power module with integrated inductor, operating from 2.4V to 5.5V input and delivering 0.6V–3.84V output (10 mV/20 mV resolution), ±1.5% voltage accuracy, and up to 95% efficiency. It serves as the primary core voltage regulator for FPGAs and SSDs requiring fast transient response and safe pre-biased start-up.
For engineers reviewing the MIC33M656-SAYMP-TR datasheet, MIC33M656-SAYMP-TR pinout, MIC33M656-SAYMP-TR application, or MIC33M656-SAYMP-TR equivalent, this page delivers verified package mapping, confirmed I²C register-level programmability (output voltage, slew rate, current limit), thermal latch-off protection, and real-world design meaning for sequencing, EMI compliance (CISPR32 Class B), and battery-powered system integration.
Technical Context
The MIC33M656-SAYMP-TR implements Constant-On-Time (COT) control with adaptive HyperLight Load® mode, enabling ultra-fast load transient response while maintaining high light-load efficiency. Its dual-path power architecture separates PVIN (power stage) and SVIN (analog reference), with dedicated AUX_PVIN and AUX_AGND pins for enhanced decoupling.
It supports full I²C slave operation at up to 3.4 MHz, retains register settings during EN=low, and features programmable enable delay (0.25–3 ms), slew rate (100–3710 µs/V), and high-side current limit (3.5–10 A). Thermal shutdown latches off after four overtemperature cycles at 165°C, with 22°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 5.5V - Enables direct use with single-cell Li-ion batteries (3.0–4.2V typical) without intermediate regulation. |
| Output Current | 6A continuous - Sustains full-rated load under -40°C to +125°C junction temperature with thermally optimized B1QFN package. |
| Output Voltage Accuracy | ±1.5% over line/load/temperature - Ensures stable core voltage for FPGA I/O banks and SSD controller logic without external calibration. |
| I²C Resolution | 10 mV (0.6–1.28V), 20 mV (1.28–3.84V) - Matches common DDR memory VDDQ and processor auxiliary rail requirements with minimal programming overhead. |
| Efficiency | Up to 95% - Reduces thermal load in space-constrained SSD modules and enables passive cooling in fanless embedded systems. |
| Shutdown Current | 1.5 µA typical - Extends battery runtime in always-on subsystems such as NVMe controller standby states. |
| CISPR32 Class B | Compliant - Meets radiated emissions limits without external shielding or ferrite beads in consumer-grade storage enclosures. |
Pinout & Package
Package: 53-lead, 6 mm × 10 mm × 3 mm B1QFN with exposed thermal pads (EP_OUT, EP_SW, EP_PGND, EP_PVIN) for low-thermal-resistance PCB mounting (θJA = 45°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pins 2,3,4,5,23,24,39,40) | Power ground return path | Closes high-current loop for low-side MOSFET and input/output capacitors; must be routed separately from AGND to avoid noise coupling. |
| SW (Pins 6–22) | Switch node connection | Connects directly to internal high-/low-side MOSFETs and integrated inductor; requires short, wide traces to minimize EMI and switching losses. |
| PVIN (Pins 41,42) + EP_PVIN | Main power input | Supplies high-side P-MOSFET; requires local 47 µF ceramic capacitor tied to PGND; EP_PVIN must connect to input power plane. |
| OUT (Pins 25–38) + EP_OUT | Regulated output terminal | Delivers 6A output; EP_OUT must be soldered to output power plane for thermal dissipation and low-impedance return path. |
| VOUT (Pin 51) | Remote output voltage sense | Enables accurate regulation at point-of-load; must connect near output capacitor's ground terminal to reject PCB IR drop. |
| SCL/SDA (Pins 45,48) | I²C interface | Supports 3.4 MHz high-speed mode; SDA has open-drain driver; both pins tolerate up to PVIN voltage and require pull-ups to SVIN. |
| EN (Pin 49) | Enable control input | Active-high logic; 1.2V min high threshold; internal 250 µs bias delay ensures reliable startup even with 0 ms programmed delay. |
| PG (Pin 50) | Open-drain Power Good | Asserts high when VOUT ≥91% of target; 4% hysteresis prevents chatter; used for inter-regulator sequencing and system fault detection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + Input/Output Capacitors | Reduces total solution size by >40% vs discrete buck ICs; eliminates external inductor selection, saturation risk, and layout sensitivity. |
| HyperLight Load® Mode | Automatically transitions to diode-emulation discontinuous conduction at light loads, achieving >85% efficiency at 1 mA - critical for SSD idle power budgets. |
| I²C Programmability (0x5B address) | Enables dynamic voltage scaling (DVS) and fault monitoring without MCU GPIO overhead; registers retain state across EN toggling. |
| Safe Pre-Biased Output Start-up | Allows hot-plug operation into existing bus voltage (e.g., backplane supplies); prevents reverse current flow and output collapse during power-up. |
| Latch-Off Overcurrent & Thermal Protection | Halts switching permanently until reset via EN toggle, preventing thermal runaway during sustained overload or PCB trace failure. |
Applications
| FPGA Core Power Delivery | SSD Controller Supply |
|---|---|
Use Scenario: Powers Xilinx Artix-7 or Intel Cyclone V FPGA core rails (0.85–1.2V) with tight transient tolerance. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 6A peak current with <100 µs recovery from 80% load step. Use Value: ±1.5% output accuracy and COT control ensure logic stability across process/voltage/temperature corners without external compensation. |
Use Scenario: Supplies Phison PS5013-E13 or Silicon Motion SM2262EN NVMe SSD controllers requiring 1.1V @ 4A with low-noise operation. IC Role / Device Role / Timing Role: Main power module with programmable slew rate to meet PCIe Gen4 power sequencing timing windows. Use Value: I²C-configurable soft-start and enable delay eliminate need for external RC timing networks on compact M.2 PCBs. |
| Battery-Powered Edge AI Module | Industrial PLC I/O Power |
Use Scenario: Powers Arm Cortex-A72 SoC in portable inference devices using 3.7V Li-ion battery input. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting 2.4–5.5V input range and 0.6–1.28V output for CPU cores. Use Value: 1.5 µA shutdown current extends battery life in sleep modes; 100% duty-cycle operation sustains regulation down to 2.4V battery cutoff. |
Use Scenario: Generates isolated 3.3V supply for industrial Ethernet PHYs and digital I/O buffers in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Robust DC-DC stage meeting CISPR32 Class B emissions without added filtering components. Use Value: Latch-off thermal protection prevents field failures in sealed enclosures; -40°C to +125°C operation supports extended ambient ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC33M650-SAYMP-TR | Same pinout, identical I²C interface, but 4A rated output and lower current limit (2.5–7A vs 3.5–10A). | Not suitable for 6A FPGA core rails; acceptable for lower-power ASICs or dual-rail SSD designs where total load ≤4A. | Select MIC33M650-SAYMP-TR only if system peak current remains below 4A and board layout re-use is prioritized over headroom. |
| TPS546B24RVFT | 6A PMBus-compatible buck converter with external inductor; higher quiescent current (12 µA vs 1.5 µA); no integrated inductor. | Requires additional magnetics and layout area; supports telemetry (voltage/current/temp) not available on MIC33M656. | Choose TPS546B24RVFT when telemetry logging or multi-phase scalability is required, accepting larger footprint and higher idle power. |
Compared with MIC33M656-SAYMP-TR, the MIC33M650-SAYMP-TR offers footprint compatibility but sacrifices 33% current headroom, while the TPS546B24RVFT trades integration for digital telemetry and flexibility-neither provides the same combination of 6A integrated power, sub-µA shutdown, and Class B EMI compliance in a 6×10 mm footprint.
Availability
MIC33M656-SAYMP-TR is available at Aetrix Electronics and suitable for FPGA power delivery, SSD controller supply, and battery-powered edge AI modules requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MIC33M656-SAYMP-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with vertical integration across design, wafer fabrication, and packaging.
The MIC33M656-SAYMP-TR belongs to Microchip's MIC33M series of fully integrated power modules, engineered specifically for high-density, low-noise, and thermally constrained applications in storage, computing, and portable industrial electronics.
FAQ
What is the default output voltage of the MIC33M656-SAYMP-TR at power-up?
The MIC33M656-SAYMP-TR powers up at 1.0V by default, as specified in Microchip's ordering information table. This safe-start voltage avoids overvoltage stress on downstream logic while allowing immediate I²C reprogramming to final operating points such as 0.85V for FPGA cores or 1.1V for SSD controllers. The device retains its last-programmed voltage setting across EN toggles, but resets to 1.0V on full power cycle.
Does the MIC33M656-SAYMP-TR support pre-biased output start-up?
Yes, the MIC33M656-SAYMP-TR supports safe start-up into a pre-biased output, as confirmed in the Functional Description section. When enabled with an existing output voltage (e.g., 0.8V), it prevents reverse current flow through internal MOSFETs and avoids output collapse. This behavior is implemented via adaptive gate drive control and is independent of I²C configuration - a key requirement for hot-swap and modular power architectures using MIC33M656-SAYMP-TR.
What is the maximum I²C clock frequency supported by the MIC33M656-SAYMP-TR?
The MIC33M656-SAYMP-TR supports I²C high-speed mode up to 3.4 MHz, as documented in the Electrical Characteristics table (SCL_CLOCK parameter). This allows rapid voltage updates during dynamic voltage scaling sequences - for example, changing output from 1.0V to 0.85V in under 200 µs with 10 mV resolution. The device responds to standard (100 kHz) and fast-mode (400 kHz) clocks as well, ensuring compatibility with legacy microcontrollers.
How does the MIC33M656-SAYMP-TR handle thermal overload conditions?
The MIC33M656-SAYMP-TR implements latch-off thermal shutdown at 165°C junction temperature, with 22°C hysteresis and automatic restart after four consecutive overtemperature cycles. Unlike foldback or hiccup modes, this behavior halts all switching until EN is cycled, preventing cumulative thermal damage in sealed enclosures. The thermal warning threshold (118°C) can be monitored via I²C register reads, enabling proactive system throttling before shutdown occurs - a feature validated in DS20006256A-page 9.
Can the MIC33M656-SAYMP-TR be used with a 3.3V input supply?
Yes, the MIC33M656-SAYMP-TR operates reliably with 3.3V input, as confirmed by its 2.4V–5.5V input range specification and efficiency curves (Figure 2-7 and 2-8). At 3.3VIN/1.0VOUT, it achieves >92% efficiency across 0.1–6A loads, making it ideal for intermediate bus architectures in SSDs and edge AI modules. Input capacitor requirements remain unchanged: two 47 µF ceramics placed close to PVIN and PGND pins per the Typical Application schematic.
MIC33M656-SAYMP-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 53-PowerBFQFN Module
- 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:
- 53-B1QFN (6x10)
MIC33M656-SAYMP-TR FAQ
1.How can I place an order for MIC33M656-SAYMP-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33M656-SAYMP-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 MIC33M656-SAYMP-TR reliable?
The price and inventory of MIC33M656-SAYMP-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33M656-SAYMP-TR is usually 5 days.
3.What payment methods are accepted for MIC33M656-SAYMP-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33M656-SAYMP-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33M656-SAYMP-TR?
MIC33M656-SAYMP-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33M656-SAYMP-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 MIC33M656-SAYMP-TR?
For technical support, including MIC33M656-SAYMP-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33M656-SAYMP-TR requirements.
6.How does Aetrix verify that MIC33M656-SAYMP-TR is sourced from the original manufacturer or authorized distributors?
All MIC33M656-SAYMP-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 MIC33M656-SAYMP-TR meets industry standards.
7.What is the process for return or replacement of MIC33M656-SAYMP-TR?
All MIC33M656-SAYMP-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC33M656-SAYMP-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 MIC33M656-SAYMP-TR part is unused and in its original packaging.
Return procedure for MIC33M656-SAYMP-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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