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Microchip Technology MIC33263YGK-T5
- Part No.:
- MIC33263YGK-T5
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerFQFN
- Datasheet:
-
MIC33263YGK-T5.pdf
- Description:
- IC REG BUCK ADJ 2A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,423
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Product details
Overview
MIC33263YGK-T5 from Micrel is a 4MHz synchronous buck regulator with integrated inductor and HyperLight Load® mode, delivering up to 2A output current at adjustable 0.7V–5V output voltage. It features 100% duty cycle operation, 33µA quiescent current, and operates in a compact 2.5mm × 3.0mm × 1.9mm QFN-20 package for space-constrained POL applications in portable devices and SSD systems.
For engineers reviewing the MIC33263YGK-T5 datasheet, MIC33263YGK-T5 pinout, MIC33263YGK-T5 application, or MIC33263YGK-T5 equivalent, key selection criteria include light-load efficiency (85% at 1mA), ultra-fast transient response, integrated inductor solution size (4.6mm × 7mm), and thermal performance (θJA = 50°C/W) under −40°C to +125°C junction conditions.
Technical Context
The MIC33263YGK-T5 employs a proprietary HyperLight Load® (HLL) control architecture combining minimum on/off time pulse-frequency modulation (PFM) at light loads (<120mA) and fixed 4MHz PWM in continuous conduction mode (CCM) above ~220mA. Its integrated power MOSFETs and inductor eliminate external magnetics while enabling 100% duty cycle low-dropout operation when VIN approaches VOUT.
This architecture delivers low output ripple across full load range using only a 22µF ceramic output capacitor, supports pre-bias start-up via configurable soft-start (SS pin), and integrates protection including undervoltage lockout (2.53V turn-on threshold), foldback current limit (2.5A min), thermal shutdown (160°C), and open-drain power good (PG) indicator with 90% VOUT rising threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 4MHz nominal in CCM; enables small external capacitors and high PSRR at RF-sensitive frequencies. |
| Output Current | 2A maximum continuous; sufficient for core logic rails in portable SoCs and SSD controllers. |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and 3.3V system rails. |
| Quiescent Current | 33µA typical; minimizes standby power loss in battery-backed systems. |
| Feedback Reference | 0.7V ±1.5% internal reference; enables precise output regulation from 0.7V to 5V via resistor divider. |
| Efficiency | 85% at 1mA / 93% peak at 1A; maintains high conversion efficiency across full load spectrum due to HLL mode. |
| Thermal Resistance | θJA = 50°C/W; supports 2A operation without forced airflow in standard PCB layouts. |
Pinout & Package
Package: 20-pin, 2.5mm × 3.0mm × 1.9mm QFN (GK), RoHS-compliant, matte tin lead finish, 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 | Low-impedance return path for high-current switching loops; must be isolated from AGND to minimize noise coupling. |
| SW (Pins 3–7) | Switch Node | Internal MOSFET output connecting to integrated inductor; high dv/dt node requiring minimal trace area and no external connection. |
| VOUT (Pins 10–13) | Regulated Output | Inductor output terminal; connects directly to 22µF ceramic capacitor and load; rated for 2A DC current. |
| AGND (Pin 14) | Analog Ground | Reference ground for feedback, soft-start, and control circuitry; ties to central star ground point near CIN/COUT/PGND. |
| AVIN (Pin 15) | Analog Input Voltage | Bias supply for control circuitry; must be tied to PVIN with dedicated 1µF ceramic bypass capacitor. |
| SS (Pin 16) | Soft-Start Control | Sets ramp-up time via external capacitor (e.g., 1nF → ~575µs); prevents output overshoot and limits inrush current. |
| PG (Pin 17) | Power Good Indicator | Open-drain output asserting high when VOUT ≥ 90% of target; requires external pull-up resistor to VOUT (≥5kΩ). |
| FB (Pin 18) | Feedback Input | Compares output voltage divider ratio against 0.7V reference; sets regulated output voltage per R1/R2 equation. |
| EN (Pin 19) | Enable Input | Logic-controlled startup/shutdown; 0.8V typical turn-on threshold; must not float; pulls device into 0.1µA shutdown state when low. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + MOSFETs | Eliminates external magnetics and layout sensitivity; reduces total solution size to 4.6mm × 7mm. |
| HyperLight Load® Mode | Enables PFM operation below 120mA, sustaining 85% efficiency at 1mA and ultra-fast load transient recovery. |
| 100% Duty Cycle Operation | Extends battery runtime by maintaining regulation down to VIN ≈ VOUT; dropout determined only by MOSFET RDS(on) and inductor DCR. |
| Low-Radiated EMI | Meets EN55022 Class B emissions without external shielding or ferrites due to monolithic integration and optimized switching edge rates. |
| Configurable Soft-Start | External capacitor on SS pin allows precise control of output ramp rate and supports pre-bias start-up for hot-swap applications. |
Applications
| 5V Point-of-Load (POL) | SSD Storage Systems |
|---|---|
Use Scenario: Local 3.3V or 1.8V rail generation from 5V backplane in enterprise SSD modules. IC Role / Device Role / Timing Role: Primary DC/DC step-down regulator providing stable, low-noise core voltage to NAND controller and DRAM buffer. Use Value: Integrated inductor eliminates EMI-sensitive external components; 4MHz switching avoids interference with PCIe Gen3/Gen4 signaling bands. | Use Scenario: Powering NVMe SSD controller ASICs requiring tight voltage tolerance and fast load-step response during burst writes. IC Role / Device Role / Timing Role: High-efficiency, low-quiescent-current buck converter supporting dynamic voltage scaling and deep sleep modes. Use Value: 33µA IQ and HLL mode extend battery-backed write-cache hold time; 2A capability handles peak I/O current surges. |
| Portable Digital Cameras | Space-Constrained IoT Edge Nodes |
Use Scenario: Supplying image sensor analog and digital rails in ultra-thin camera modules where board area is at premium. IC Role / Device Role / Timing Role: Compact, self-contained power stage replacing discrete buck + inductor solutions for dual-rail camera SoC power domains. Use Value: 2.5mm × 3.0mm footprint and 1.9mm height enable placement under camera lens assemblies; low output ripple ensures clean analog sensor bias. | Use Scenario: Powering ARM Cortex-M based wireless sensor nodes operating from coin-cell or energy-harvesting sources. IC Role / Device Role / Timing Role: Primary system regulator managing battery-to-3.3V conversion with intelligent low-power mode sequencing. Use Value: 0.1µA shutdown current preserves source energy; 100% duty cycle extends usable battery range down to 2.7V cutoff. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62260DRVR | 3MHz fixed-frequency buck; 2A output; 2.05V–6V input; 25µA IQ; no integrated inductor. | Requires external inductor and compensation; larger solution size; higher EMI filtering burden. | Select when design flexibility with custom inductor selection outweighs space constraints and EMI goals. |
| Analog Devices ADP2370ACPZ-R7 | 1.2MHz buck; 800mA output; 3.2V–15V input; 30µA IQ; integrated MOSFETs but no inductor. | Limited current capability; unsuitable for 2A loads; wider input range trades off efficiency at low VIN. | Consider only for lower-current auxiliary rails where input voltage exceeds 5.5V. |
Compared with TPS62260DRVR and ADP2370ACPZ-R7, the MIC33263YGK-T5 uniquely combines 2A capability, integrated inductor, 4MHz operation, and HyperLight Load® efficiency-enabling smallest possible footprint and lowest radiated emissions without sacrificing light-load performance.
Availability
MIC33263YGK-T5 is available at Aetrix Electronics and suitable for 5V point-of-load (POL), SSD storage systems, and portable digital cameras requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC33263YGK-T5 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 to address space-constrained, battery-sensitive applications requiring high efficiency across wide load ranges-specifically targeting portable electronics, SSDs, and imaging systems needing integrated power solutions.
FAQ
What is the maximum output current supported by the MIC33263YGK-T5?
The MIC33263YGK-T5 supports up to 2A of continuous output current under specified thermal conditions (TJ ≤ +125°C, θJA = 50°C/W). Peak current limit is guaranteed at 2.5A minimum across temperature, enabling robust handling of short-duration load transients without foldback activation. Derating is required above ambient temperatures exceeding 60°C unless additional copper pour or airflow is applied.
Does the MIC33263YGK-T5 require an external inductor?
No, the MIC33263YGK-T5 does not require an external inductor-it integrates a high-efficiency power inductor within the 2.5mm × 3.0mm QFN package. This eliminates inductor selection, placement, and EMI tuning effort, reducing total solution size to just 4.6mm × 7mm. The internal inductor is optimized for 4MHz operation and rated for 2A DC current with low DCR.
How does HyperLight Load® mode improve efficiency at light loads in the MIC33263YGK-T5?
HyperLight Load® mode in the MIC33263YGK-T5 uses a proprietary minimum on/off time PFM scheme that disables switching until output voltage droops below regulation threshold. This eliminates unnecessary gate drive and switching losses, achieving 85% efficiency at 1mA output-far exceeding conventional 4MHz PWM regulators. The mode transitions seamlessly to fixed-frequency PWM above ~220mA for optimal heavy-load efficiency.
What is the purpose of the SS (Soft-Start) pin on the MIC33263YGK-T5?
The SS pin on the MIC33263YGK-T5 controls output voltage ramp rate during startup via an external capacitor. A 1nF capacitor yields ~575µs rise time, preventing output overshoot and limiting inrush current into bulk capacitance. It also enables pre-bias start-up-allowing safe activation when output already holds residual voltage-critical for hot-swap and multi-rail sequencing applications using the MIC33263YGK-T5.
Can the MIC33263YGK-T5 operate with input voltage equal to the output voltage?
Yes, the MIC33263YGK-T5 supports 100% duty cycle operation, allowing it to maintain regulation when input voltage drops to within tens of millivolts of the programmed output voltage. In this mode, the high-side MOSFET remains continuously on, and dropout is determined solely by the MOSFET's RDS(on) and inductor DCR-making the MIC33263YGK-T5 ideal for maximizing battery runtime in single-cell Li-ion systems.
MIC33263YGK-T5 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-T5 FAQ
1.How can I place an order for MIC33263YGK-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33263YGK-T5 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-T5 reliable?
The price and inventory of MIC33263YGK-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33263YGK-T5 is usually 5 days.
3.What payment methods are accepted for MIC33263YGK-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33263YGK-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33263YGK-T5?
MIC33263YGK-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33263YGK-T5 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-T5?
For technical support, including MIC33263YGK-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33263YGK-T5 requirements.
6.How does Aetrix verify that MIC33263YGK-T5 is sourced from the original manufacturer or authorized distributors?
All MIC33263YGK-T5 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-T5 meets industry standards.
7.What is the process for return or replacement of MIC33263YGK-T5?
All MIC33263YGK-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC33263YGK-T5, 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-T5 part is unused and in its original packaging.
Return procedure for MIC33263YGK-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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