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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Microchip Technology MIC33M356-SAYMP-TR

Name: MIC33M356-SAYMP-TR
Brand: Microchip Technology
SKU: MIC33M356-SAYMP-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MIC33M356-SAYMP-TR

Manufacturer:: Microchip Technology

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 24-PowerFQFN

Datasheet:: MIC33M356-SAYMP-TR.pdf

Description:: IC REG BUCK ADJ 3A 24QFN

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Product details

Overview

MIC33M356-SAYMP-TR from Microchip Technology is an I²C-programmable, integrated-inductor synchronous buck power module delivering 3A output current with 0.6V–3.84V programmable output voltage (10 mV/20 mV resolution), 2.4V–5.5V input range, and ±1.5% output accuracy over line/load/temperature - deployed in SSDs, ultrabooks, and FPGA core power rails.

For engineers reviewing the MIC33M356-SAYMP-TR datasheet, MIC33M356-SAYMP-TR pinout, MIC33M356-SAYMP-TR application, or MIC33M356-SAYMP-TR equivalent, this page delivers verified package mapping (24-pin QFN, 3.0 mm × 4.5 mm), confirmed I²C register-level control (0x5B address), thermal latch-off behavior (+165°C), and HyperLight Load® mode efficiency data - all directly traceable to DS20006349A.

Technical Context

The MIC33M356-SAYMP-TR implements Constant On-Time (COT) control with adaptive on-time adjustment to maintain near-constant switching frequency in CCM, while automatically entering HyperLight Load® mode at light loads to reduce switching losses. Its dual-path sensing monitors both high-side (3.5A/5A selectable) and low-side MOSFET currents for hiccup-mode short-circuit protection.

I²C interface remains active during EN = low (as long as PVIN > UVLO threshold), enabling pre-configuration by host MCU; output voltage changes occur on-the-fly with programmable slew rate (100–3710 µs/V). Power Good (PG) provides open-drain sequencing signal with 91% rising threshold, 4% hysteresis, and 65 µs blanking time.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.4V to 5.5V - supports single-cell Li-ion battery operation across full discharge curve without dropout.
Output Current	3A continuous - sufficient for FPGA core, ASIC, or SSD controller VDDQ rails with margin.
Output Voltage Range & Resolution	0.6V–1.28V @ 10 mV step; 1.28V–3.84V @ 20 mV step - enables precise core voltage tuning for multiple SoC operating points.
Output Voltage Accuracy	±1.5% over line/load/temperature - ensures stable logic-level compliance across industrial temperature range (−40°C to +125°C).
I²C Interface Speed	Up to 3.4 MHz (High-Speed mode) - allows rapid configuration updates during dynamic voltage scaling (DVS).
Thermal Protection	Latch-off shutdown at +165°C with +22°C hysteresis - prevents thermal runaway in compact PCB layouts.
Shutdown Current	1.5 µA typical - minimizes battery drain in always-on system standby states.

Pinout & Package

Package: 24-lead QFN, 3.0 mm × 4.5 mm × 1.8 mm, thermally enhanced with exposed pads (EP1_PGND, EP2_PGND, EP_SW, EP_OUT) connected internally to PGND, SW, and OUT respectively.

Pin/Terminal	Circuit Role	Design Meaning
PGND (Pins 1,2,3,10,11)	Power Ground return path	Carries high-frequency switching current; must be low-impedance, separate from AGND to avoid noise coupling.
SW (Pins 4–9)	Switch node connection	Connects internal high-/low-side MOSFETs and integrated inductor; requires minimal trace length/area to reduce 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 rail	Provides clean bias for control circuitry; decoupled with 1.0 µF ceramic cap to AGND, isolated from PVIN via 10 Ω resistor.
SCL / SDA (Pins 19–20)	I²C serial interface	Open-drain slave interface (address 0x5B); functional even during EN = low if PVIN > UVLO (2.225 V).
EN (Pin 21)	Enable control input	Active-high logic; supports programmable startup delay (0.25 ms to 3 ms) to coordinate multi-rail sequencing.
PG (Pin 22)	Power Good status output	Open-drain signal asserting high when VOUT ≥ 91% of target; used for inter-regulator enable sequencing.
VOUT (Pin 23)	Remote output voltage sense	Enables Kelvin sensing at load; also activates internal 10 Ω pull-down for safe discharge when EN = low.
OUT (Pins 12–16)	Power output terminals	Delivers regulated 3A output; connects externally to EP_OUT thermal pad for low-impedance current path.
AGND (Pin 24)	Analog reference ground	Reference for feedback and control circuits; must connect to quiet ground plane, isolated from PGND return paths.

Key Features

Feature	Design Value
I²C programmability	Full register access (output voltage, slew rate, soft-start, current limit, discharge enable) without requiring external components.
HyperLight Load® mode	Automatically reduces switching frequency at light loads to achieve >90% efficiency down to 1 mA, extending battery life.
Safe start-up with pre-biased output	Prevents reverse current flow when enabled into existing output voltage - critical for hot-swap and multi-phase systems.
Integrated inductor	Eliminates external magnetics, reducing BOM count and layout area; optimized for 0.47 µH value with low DCR.
Output discharge on disable	Internal 10 Ω pull-down activated via I²C CTRL2 bit - ensures fast, controlled VOUT ramp-down for system reset integrity.
CISPR32 Class B compliance	Meets radiated emissions limits without additional shielding or filtering - simplifies EMC certification for portable devices.

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 with dynamic load steps up to 3A. IC Role / Device Role / Timing Role: Primary DC-DC converter supplying 0.85V–1.2V core rail with ultra-fast transient response (<100 µs recovery). Use Value: HyperLight Load® mode maintains >85% efficiency at 10 mA idle current, extending SSD standby time.	Use Scenario: Delivers configurable core voltage (0.75V–1.2V) to Xilinx Artix-7 or Intel Cyclone V FPGA under partial reconfiguration. IC Role / Device Role / Timing Role: I²C-controlled buck module enabling on-the-fly voltage scaling synchronized with configuration bitstream loading. Use Value: 10 mV output resolution and 0.25–3 ms programmable enable delay support precise timing alignment with FPGA power-on sequence.
Ultrabook CPU I/O Voltage Rail	Low-Power ASIC Power Management
Use Scenario: Supplies 1.05V/3A I/O rail for Intel Core i5/i7 mobile processors in fanless ultrabooks. IC Role / Device Role / Timing Role: Secondary regulator following main CPU core VRM; sequenced via PG-to-EN daisy chain. Use Value: PG open-drain output with 65 µs blanking time prevents false sequencing faults during input voltage transients.	Use Scenario: Powers image signal processor (ISP) in battery-powered IoT cameras with burst-mode operation. IC Role / Device Role / Timing Role: Always-on power stage managing deep-sleep (1.5 µA shutdown) and wake-up (programmable slew rate) transitions. Use Value: 1.5 µA shutdown current and I²C accessibility during EN = low enable deterministic low-power state entry/exit.

Solid-State Drive (SSD) Core Power

FPGA Core Voltage Regulation

Use Scenario: Powers NAND flash controller and DRAM cache in M.2 NVMe SSDs with dynamic load steps up to 3A.

IC Role / Device Role / Timing Role: Primary DC-DC converter supplying 0.85V–1.2V core rail with ultra-fast transient response (<100 µs recovery).

Use Value: HyperLight Load® mode maintains >85% efficiency at 10 mA idle current, extending SSD standby time.

Use Scenario: Delivers configurable core voltage (0.75V–1.2V) to Xilinx Artix-7 or Intel Cyclone V FPGA under partial reconfiguration.

IC Role / Device Role / Timing Role: I²C-controlled buck module enabling on-the-fly voltage scaling synchronized with configuration bitstream loading.

Use Value: 10 mV output resolution and 0.25–3 ms programmable enable delay support precise timing alignment with FPGA power-on sequence.

Ultrabook CPU I/O Voltage Rail

Low-Power ASIC Power Management

Use Scenario: Supplies 1.05V/3A I/O rail for Intel Core i5/i7 mobile processors in fanless ultrabooks.

IC Role / Device Role / Timing Role: Secondary regulator following main CPU core VRM; sequenced via PG-to-EN daisy chain.

Use Value: PG open-drain output with 65 µs blanking time prevents false sequencing faults during input voltage transients.

Use Scenario: Powers image signal processor (ISP) in battery-powered IoT cameras with burst-mode operation.

IC Role / Device Role / Timing Role: Always-on power stage managing deep-sleep (1.5 µA shutdown) and wake-up (programmable slew rate) transitions.

Use Value: 1.5 µA shutdown current and I²C accessibility during EN = low enable deterministic low-power state entry/exit.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck power module applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MIC33M350-SAYMP-TR	Same pinout, identical I²C register map, but fixed 1.0V default output (no 0.9V option); same 3A rating and thermal specs.	Lacks dual-default-voltage capability; not suitable where safe boot at 0.9V is required before I²C reprogramming.	Select when board layout reuse is critical and 0.9V startup is unnecessary.
TPS62864A0RQYR	3A, 2.4V–5.5V input, I²C-programmable (0.3V–1.5V), but no >1.5V range; 1.2% accuracy; 2.5 MHz fixed-frequency PWM only.	No HyperLight Load® mode; higher light-load quiescent current (2.5 µA vs. 1.5 µA); lacks output discharge and pre-bias start.	Choose for designs prioritizing fixed-frequency EMI control over ultra-low-light-load efficiency or wide-VOUT flexibility.

Compared with MIC33M356-SAYMP-TR, MIC33M350-SAYMP-TR offers drop-in mechanical compatibility but reduced startup flexibility, while TPS62864A0RQYR trades programmable VOUT range and advanced light-load modes for tighter accuracy and simpler EMI profile - making each suitable for distinct subsystem requirements.

Availability

MIC33M356-SAYMP-TR is available at Aetrix Electronics and suitable for solid-state drives, ultrabooks, and FPGA power management systems requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade alternatives.

Supply support for MIC33M356-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 Inc. is a leading provider of microcontrollers, analog devices, and power management ICs, with global manufacturing and quality certifications including ISO 9001 and AEC-Q200.

The MIC33M356 product line delivers fully integrated, I²C-configurable buck modules targeting space-constrained, battery-powered computing and storage applications demanding high efficiency, precision regulation, and robust fault handling.

FAQ

What is the default output voltage of the MIC33M356-SAYMP-TR at power-up?

The MIC33M356-SAYMP-TR powers up at 1.0V by default, as specified in Microchip's ordering information table. This safe startup voltage is factory-programmed and can be immediately reconfigured via I²C to any value between 0.6V and 3.84V without requiring EN toggling. The MIC33M356-SAYMP-TR does not support 0.9V as a default - that option applies only to the -FAYMP variant.

Does the MIC33M356-SAYMP-TR support output voltage programming while disabled?

Yes, the MIC33M356-SAYMP-TR retains full I²C functionality (address 0x5B) even when EN = low, provided PVIN remains above the 2.225V UVLO threshold. This allows host MCUs to pre-configure output voltage, slew rate, and other registers before enabling the regulator - a key feature for deterministic power sequencing in complex systems using MIC33M356-SAYMP-TR.

What is the purpose of the VOUT pin on the MIC33M356-SAYMP-TR?

The VOUT pin on the MIC33M356-SAYMP-TR serves two critical functions: (1) remote output voltage sensing for improved load regulation, requiring direct connection to the output capacitor's positive terminal; and (2) activation of the internal 10 Ω discharge path to ground when EN = low - ensuring rapid, controlled VOUT ramp-down for system reset integrity. Both functions are integral to MIC33M356-SAYMP-TR's safe-start and sequencing capabilities.

How does the HyperLight Load® mode affect efficiency in the MIC33M356-SAYMP-TR?

HyperLight Load® mode in the MIC33M356-SAYMP-TR dynamically reduces switching frequency at light loads (e.g., <100 mA), minimizing switching and gate drive losses. This enables >90% efficiency at 1 mA output current - significantly outperforming forced-PWM alternatives - while maintaining ultra-fast transient response. Efficiency curves in DS20006349A Figure 2-6 through 2-9 confirm this behavior across VOUT = 0.6V to 3.3V for MIC33M356-SAYMP-TR.

Is the MIC33M356-SAYMP-TR pin-compatible with other members of the MIC33M3xx family?

Yes, the MIC33M356-SAYMP-TR shares identical 24-pin QFN (3.0 mm × 4.5 mm) packaging and pinout with the MIC33M350 series, enabling direct PCB footprint reuse. However, register defaults (e.g., startup voltage, resolution options) differ: MIC33M356-SAYMP-TR supports 0.6V–3.84V with 10/20 mV steps, whereas MIC33M350 variants are limited to 0.6V–1.28V with 5 mV resolution - a functional distinction requiring firmware validation when substituting MIC33M356-SAYMP-TR.

MIC33M356-SAYMP-TR Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 24-PowerFQFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Function:: Step-Down

Output Configuration:: Positive

Topology:: Buck

Output Type:: Adjustable

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:: 2.2MHz

Synchronous Rectifier:: Yes

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-QFN (3x4.5)

MIC33M356-SAYMP-TR FAQ

1.How can I place an order for MIC33M356-SAYMP-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for MIC33M356-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 MIC33M356-SAYMP-TR reliable?

The price and inventory of MIC33M356-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 MIC33M356-SAYMP-TR is usually 5 days.

3.What payment methods are accepted for MIC33M356-SAYMP-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33M356-SAYMP-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MIC33M356-SAYMP-TR?

MIC33M356-SAYMP-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MIC33M356-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 MIC33M356-SAYMP-TR?

For technical support, including MIC33M356-SAYMP-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33M356-SAYMP-TR requirements.

6.How does Aetrix verify that MIC33M356-SAYMP-TR is sourced from the original manufacturer or authorized distributors?

All MIC33M356-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 MIC33M356-SAYMP-TR meets industry standards.

7.What is the process for return or replacement of MIC33M356-SAYMP-TR?

All MIC33M356-SAYMP-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC33M356-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 MIC33M356-SAYMP-TR part is unused and in its original packaging.

Return procedure for MIC33M356-SAYMP-TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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