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Microchip Technology MIC33263YGK-TR
- Part No.:
- MIC33263YGK-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerFQFN
- Datasheet:
-
MIC33263YGK-TR.pdf
- Description:
- IC REG BUCK ADJ 2A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,211
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Product details
Overview
MIC33263YGK-TR from Micrel is a 4MHz synchronous buck regulator with integrated inductor and HyperLight Load® mode, delivering up to 2A output current at adjustable voltages from 0.7V to 5V. It features 100% duty cycle operation, 33µA quiescent current, and operates across −40°C to +125°C in a compact 2.5mm × 3.0mm QFN package-designed for space-constrained portable devices and SSD power rails.
For engineers reviewing the MIC33263YGK-TR datasheet, MIC33263YGK-TR pinout, MIC33263YGK-TR application, or MIC33263YGK-TR equivalent, key selection criteria include light-load efficiency (85% at 1mA), ultra-fast transient response, low output ripple with small ceramic capacitors, and compatibility with 2.7V–5.5V input supplies in high-density POL designs.
Technical Context
The MIC33263YGK-TR implements a proprietary HyperLight Load® (HLL) control architecture combining minimum-on/off-time pulse-frequency modulation (PFM) at light loads and fixed-frequency 4MHz PWM in continuous conduction mode above ~220mA. Its integrated MOSFETs and inductor eliminate external magnetics while maintaining stable regulation via a 0.7V internal reference and resistor-divider feedback.
This architecture enables 100% duty cycle operation near dropout, reducing voltage differential to only RDS(on) + inductor DCR losses, and delivers <1% output voltage load regulation across 20mA–1A while sustaining <0.1µA shutdown current and EN-controlled logic-level enable functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 4MHz nominal in PWM mode; enables compact LC filtering and reduces EMI fundamental frequency. |
| Output Current | Up to 2A continuous; supports high-current digital loads like SSD controllers and FPGA I/O rails. |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li-ion, USB 5V, and regulated 3.3V/5V system rails. |
| Quiescent Current | 33µA typical; minimizes standby power loss in battery-powered applications. |
| Feedback Reference | 0.7V ±2.5%; enables precise output programming from 0.7V to 5V using standard resistor dividers. |
| Efficiency | 85% at 1mA, up to 93% peak at mid-load; achieved via HLL mode and synchronous rectification. |
| Shutdown Current | 0.1µA max; ensures negligible battery drain during system sleep states. |
| Thermal Shutdown | 160°C with 20°C hysteresis; protects against sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 20-pin 2.5mm × 3.0mm × 1.9mm QFN (GK), RoHS-compliant, matte tin lead finish, green halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 1, 20) | Power Input Voltage | Supplies internal high-side MOSFET; requires local 2.2µF+ ceramic decoupling to PGND for noise suppression. |
| PGND (Pins 2, 8, 9) | Power Ground | High-current return path for switching loop; must be low-inductance and physically separated from AGND. |
| SW (Pins 3–7) | Switch Node | Internal MOSFET output connecting to integrated inductor; high dv/dt node requiring minimal trace area. |
| VOUT (Pins 10–13) | Regulated Output | Inductor output terminal; connects directly to 22µF ceramic capacitor for filtering and transient response. |
| AGND (Pin 14) | Analog Ground | Reference ground for FB, SS, PG, and control circuitry; ties to central star point with CIN/COUT/PGND. |
| AVIN (Pin 15) | Analog Supply | Bias supply for control logic; tied to PVIN but filtered separately with 1µF capacitor to suppress switching noise. |
| SS (Pin 16) | Soft-Start | Controls VOUT ramp-up time via external capacitor; prevents inrush current and overshoot at startup. |
| PG (Pin 17) | Power Good | Open-drain indicator asserting when VOUT reaches ≥90% of target; requires external pull-up to VOUT. |
| FB (Pin 18) | Feedback Input | Compares resistive divider output to 0.7V reference; sets final output voltage per Equation 2. |
| EN (Pin 19) | Enable Input | Logic-level control: high ≥0.8V enables regulation; low ≤0.5V disables with 0.1µA shutdown current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + MOSFETs | Eliminates external magnetics and layout-sensitive power loops-reducing solution size to 4.6mm × 7mm. |
| HyperLight Load® Mode | Enables PFM operation below ~120mA, sustaining 85% efficiency at 1mA without sacrificing transient response. |
| 100% Duty Cycle Operation | Extends usable input range down to VOUT + (ILOAD × RDS(on) + DCR), critical for battery end-of-life support. |
| Low-Radiated EMI | Meets EN55022 Class B limits due to integrated switching elements and optimized internal routing. |
| Configurable Soft-Start | Adjustable startup time (e.g., 575µs with 1nF) prevents output overshoot and controls inrush into downstream capacitance. |
| Thermal & Current Protection | Includes foldback current limit, under-voltage lockout (2.53V turn-on), and thermal shutdown (160°C) with hysteresis. |
Applications
| 5V Point-of-Load (POL) | SSD Storage Systems |
|---|---|
Use Scenario: Local 5V rail generation for PCIe interface ICs or SATA controllers on compact storage modules. IC Role / Device Role / Timing Role: Primary DC/DC step-down regulator providing clean, tightly regulated 5V from 5.5V system bus. Use Value: Delivers 2A peak current with <0.3% load regulation and ultra-low ripple-ensuring signal integrity and compliance with PCIe power specs. | Use Scenario: Powering NAND flash controller and DRAM buffer in M.2 NVMe SSDs where board area is severely constrained. IC Role / Device Role / Timing Role: High-efficiency, integrated buck converter supplying 1.2V/1.8V/3.3V rails from single 3.3V or 5V source. Use Value: Achieves 93% peak efficiency and 85% at 1mA idle state-extending battery life in portable SSD enclosures. |
| Digital Cameras | Portable Medical Sensors |
Use Scenario: Powering image sensor analog front-end and ISP core in ultra-thin camera modules. IC Role / Device Role / Timing Role: Adjustable-output buck regulator delivering 1.2V, 1.8V, or 2.5V with fast load transient response to handle burst capture modes. Use Value: HyperLight Load® mode maintains >80% efficiency during preview (low ILOAD) and transitions seamlessly to 4MHz PWM during capture-minimizing thermal rise. | Use Scenario: Regulating power for low-power MCU, BLE radio, and analog sensor front-end in handheld diagnostic devices. IC Role / Device Role / Timing Role: Primary system regulator enabling long battery life via 0.1µA shutdown and 33µA quiescent current. Use Value: 100% duty cycle operation extends runtime as battery voltage drops to 2.7V while maintaining stable 3.3V output. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | 3MHz switching frequency; 1.2A output; 2.5µA quiescent current; no integrated inductor. | Requires external inductor and compensation components; smaller solution footprint not guaranteed. | Select when lower IQ dominates over integration and 2A capability is unnecessary. |
| RT7295BGJ6F | 2MHz operation; 3A output; 30µA IQ; integrated inductor; no HyperLight Load® mode. | Lacks PFM light-load optimization-efficiency drops below 80% at 1mA; higher output ripple. | Prefer when higher current headroom is needed and light-load efficiency is secondary. |
Compared with TPS62260DRVR and RT7295BGJ6F, the MIC33263YGK-TR uniquely combines 2A capability, integrated magnetics, and HyperLight Load®-delivering best-in-class light-load efficiency and smallest total solution size for space-critical 1–2A POL applications.
Availability
MIC33263YGK-TR is available at Aetrix Electronics and suitable for 5V point-of-load (POL), SSD storage systems, and portable medical sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC33263YGK-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
Micrel Inc. was a U.S.-based semiconductor company specializing in high-performance analog, power, timing, and communications ICs before its acquisition by Microchip Technology in 2015.
The MIC33263/4 product line was designed specifically for ultra-compact, high-efficiency DC/DC conversion in portable and space-constrained electronics-emphasizing integration, light-load performance, and ease of layout.
FAQ
What is the maximum output current supported by the MIC33263YGK-TR?
The MIC33263YGK-TR supports up to 2A continuous output current under typical operating conditions (TA = 25°C, VIN = 3.6V). Peak current limit is specified at 2.5A minimum, with derating required above +85°C ambient or with insufficient PCB copper area. Thermal shutdown activates at 160°C junction temperature to protect the device.
Does the MIC33263YGK-TR require an external inductor?
No, the MIC33263YGK-TR integrates both power MOSFETs and the power inductor within its 2.5mm × 3.0mm QFN package. This eliminates external magnetics, reduces layout sensitivity, and enables a total solution size of just 4.6mm × 7mm-making it ideal for ultra-dense PCBs where board space is at a premium.
How does HyperLight Load® mode improve efficiency at light loads?
HyperLight Load® mode uses a proprietary minimum-on/off-time PFM scheme that activates below ~120mA. Instead of forced 4MHz switching, the MIC33263YGK-TR pulses only when needed to maintain regulation-reducing gate drive and switching losses. This achieves 85% efficiency at 1mA, far exceeding conventional PWM-only regulators.
What is the purpose of the AGND and PGND separation in the MIC33263YGK-TR layout?
AGND provides a quiet reference for the FB, SS, and PG circuits, while PGND carries high di/dt switching currents. Separating these grounds prevents noise coupling from the power loop into the sensitive analog control path-ensuring stable regulation, accurate power-good assertion, and minimal output voltage error. They must connect at a single star point near CIN/COUT.
Can the MIC33263YGK-TR operate with input voltage equal to the output voltage?
Yes-the MIC33263YGK-TR supports 100% duty cycle operation, allowing it to maintain regulation even when VIN approaches VOUT. In this mode, the high-side MOSFET remains fully on, and the output voltage drop equals ILOAD × (RDS(on) + inductor DCR). This extends usable battery life in applications where input voltage sags near the regulated output level.
MIC33263YGK-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 20-PowerFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.7V
- Voltage - Output (Max):
- 5V
- Current - Output:
- 2A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (2.5x3)
MIC33263YGK-TR FAQ
1.How can I place an order for MIC33263YGK-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33263YGK-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 MIC33263YGK-TR reliable?
The price and inventory of MIC33263YGK-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33263YGK-TR is usually 5 days.
3.What payment methods are accepted for MIC33263YGK-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33263YGK-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33263YGK-TR?
MIC33263YGK-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33263YGK-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 MIC33263YGK-TR?
For technical support, including MIC33263YGK-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33263YGK-TR requirements.
6.How does Aetrix verify that MIC33263YGK-TR is sourced from the original manufacturer or authorized distributors?
All MIC33263YGK-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 MIC33263YGK-TR meets industry standards.
7.What is the process for return or replacement of MIC33263YGK-TR?
All MIC33263YGK-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC33263YGK-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 MIC33263YGK-TR part is unused and in its original packaging.
Return procedure for MIC33263YGK-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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