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Microchip Technology MIC33163YGJ-T5
- Part No.:
- MIC33163YGJ-T5
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerTFQFN
- Datasheet:
-
MIC33163YGJ-T5.pdf
- Description:
- IC REG BUCK ADJ 1A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,935
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Product details
Overview
MIC33163YGJ-T5 from Micrel is a 4MHz synchronous buck regulator with integrated inductor and HyperLight Load® (HLL) mode, delivering up to 1A output current, 0.7V–5V adjustable output voltage, and 93% peak efficiency. It operates from 2.7V–5.5V input, supports 100% duty cycle for low-dropout operation, and targets space-constrained portable and SSD power rails.
For engineers reviewing the MIC33163YGJ-T5 datasheet, MIC33163YGJ-T5 pinout, MIC33163YGJ-T5 application, or MIC33163YGJ-T5 equivalent, key selection criteria include light-load efficiency at 1mA (85%), ultra-fast transient response, QFN-20 (2.5mm × 3.0mm) package footprint, and integrated inductor eliminating external magnetics.
Technical Context
The MIC33163YGJ-T5 employs a proprietary HyperLight Load® control architecture combining minimum on-/off-time pulse-frequency modulation (PFM) at light loads and fixed 4MHz PWM in continuous conduction mode above ~220mA. Its integrated PMOS/NMOS power stage enables synchronous rectification and 100% duty cycle operation when VIN approaches VOUT.
It features internal soft-start (programmable via SS pin), open-drain power-good (PG) indicator referenced to 0.7V feedback threshold, and thermal shutdown at 160°C with 20°C hysteresis. Undervoltage lockout activates at 2.53V (typ) with 75mV hysteresis, ensuring stable startup under sag conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 4MHz nominal in PWM mode; enables compact LC filtering and high-frequency noise suppression. |
| Output Current | 1A maximum continuous; supports point-of-load regulation for FPGA I/O, microcontroller cores, and SSD controllers. |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li-ion, USB 5V, and 3.3V/5V system rails. |
| Feedback Reference | 0.7V ±1.5% (0.682–0.717V); sets precise output voltage via external resistor divider (e.g., 1.8V @ R1=340kΩ/R2=215kΩ). |
| Quiescent Current | 33µA typical at no load; minimizes standby power loss in battery-powered devices. |
| Shutdown Current | 0.1µA typical; enables deep-sleep modes without compromising system-level energy budget. |
| Efficiency | 85% at 1mA, up to 93% peak at 1A; maintains high conversion efficiency across full load range via HLL mode. |
| Thermal Resistance | θJA = 50°C/W; supports 1A operation up to +125°C junction temperature with standard PCB copper area. |
Pinout & Package
Package: 20-pin, 2.5mm × 3.0mm × 1.1mm QFN (GJ), RoHS-compliant, halogen-free, matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 1, 20) | Power Input Supply | Connects to 2.7–5.5V input rail; requires local 2.2µF ceramic decoupling to PGND for high-frequency noise suppression. |
| PGND (Pins 2, 8, 9) | Power Ground Return | High-current return path for switching node; must be low-inductance, separate from AGND to prevent coupling. |
| SW (Pins 3–7) | Internal Switch Node | Connects to integrated inductor; high dv/dt node-must be kept short and isolated from sensitive analog traces. |
| VOUT (Pins 10–13) | Regulated Output | Delivers up to 1A; connects directly to 22µF ceramic output capacitor for ripple reduction and transient response. |
| AGND (Pin 14) | Analog Ground Reference | Reference for FB, SS, and internal control circuitry; ties to central ground point near CIN/COUT/PGND for stability. |
| AVIN (Pin 15) | Analog Supply Input | Bias supply for control loop; must be tied to PVIN with local 1µF ceramic bypass to suppress switching noise. |
| SS (Pin 16) | Soft-Start Control | Programs ramp-up time (e.g., 1nF → ~575µs); prevents inrush current and output overshoot during startup. |
| PG (Pin 17) | Power-Good Indicator | Open-drain output asserting high when VOUT ≥90% of target; requires external pull-up to VOUT or system rail. |
| FB (Pin 18) | Feedback Input | Senses output via resistor divider; regulates to 0.7V reference; determines final output voltage (0.7–5V range). |
| EN (Pin 19) | Enable Input | Logic-high (>0.8V) enables regulation; logic-low (<0.5V) disables device and reduces IQ to 0.1µA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + MOSFETs | Eliminates external magnetics and discrete FETs-reduces solution size to 4.6mm × 7mm and simplifies layout. |
| HyperLight Load® Mode | Proprietary PFM control delivers 85% efficiency at 1mA while enabling ultra-fast load transient recovery (<10µs). |
| 100% Duty Cycle Operation | Extends battery runtime by maintaining regulation down to VIN ≈ VOUT; dropout determined only by RDS(ON) and inductor DCR. |
| Low-Radiated EMI | Meets EN55022 Class B limits without shielding-enabled by monolithic integration and optimized internal routing. |
| Configurable Soft-Start | External capacitor (1nF typical) sets controlled VOUT ramp; supports pre-bias start-up without reverse current flow. |
| Robust Protection Suite | Includes UVLO, thermal shutdown (160°C), fold-back current limit (2.5–3.3A), and PG monitoring for system-level fault detection. |
Applications
| 5V Point-of-Load (POL) | SSD Storage Systems |
|---|---|
Use Scenario: Local 3.3V or 1.8V rail generation for NAND flash I/O or controller logic in M.2/U.2 SSD modules. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator providing clean, tightly regulated output with fast transient response to handle bursty NAND access. Use Value: Integrated inductor eliminates EMI-sensitive external components; 4MHz switching allows small 22µF output cap, reducing board area by >30% vs. 500kHz solutions. | Use Scenario: Powering DRAM cache buffers and PCIe interface logic in enterprise SSDs where thermal density and space are constrained. IC Role / Device Role / Timing Role: High-efficiency POL converter supporting dynamic voltage scaling and deep-sleep states via ultra-low 0.1µA shutdown current. Use Value: HyperLight Load® maintains >80% efficiency at 100µA–1mA standby currents-extending SSD idle time without compromising wake latency. |
| Digital Cameras | Portable Medical Sensors |
Use Scenario: Supplying image sensor analog front-end (AFE) and ISP core voltage (1.2V/1.8V) in compact camera modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buck regulator delivering stable rail during rapid sensor readout and autofocus motor activation. Use Value: Low output ripple (<10mVpp typical) and 100% duty cycle enable uninterrupted operation during battery voltage sag below 3.0V. | Use Scenario: Powering ultra-low-power MCU, ADC, and wireless transceiver in wearable ECG or glucose monitors. IC Role / Device Role / Timing Role: Primary system regulator managing multiple sleep/wake cycles with minimal quiescent loss. Use Value: 33µA quiescent current and programmable soft-start ensure reliable cold-start from coin-cell batteries while meeting ISO 13485 leakage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62865RQYR | 4MHz, 1.5A, integrated inductor; 0.6V–5.5V output; 25µA IQ; no HLL mode-uses forced-PWM at light loads. | Higher current rating but lower light-load efficiency (75% @ 1mA); lacks 100% duty cycle for true LDO-like operation. | Select when >1A peak current or tighter output voltage accuracy (±0.5%) is required; avoid if battery runtime at microamp loads is critical. |
| RT7297BZSP | 2MHz, 1A, external inductor; 0.6V–5.5V output; 35µA IQ; includes spread-spectrum clocking for EMI reduction. | Larger solution size due to external inductor; lower switching frequency increases output cap requirements; no integrated magnetics. | Select when cost sensitivity outweighs board area constraints, or when design flexibility with custom inductor selection is preferred. |
Compared with TPS62865RQYR and RT7297BZSP, the MIC33163YGJ-T5 uniquely combines monolithic integration, HyperLight Load® efficiency at microamp loads, and 100% duty cycle-making it optimal for miniaturized, battery-critical applications where solution size and light-load performance dominate.
Availability
MIC33163YGJ-T5 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-lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC33163YGJ-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. It pioneered integrated power modules with embedded magnetics.
The MIC33163/4 family was designed specifically for space-constrained, battery-powered applications demanding ultra-small footprint, high light-load efficiency, and seamless transition between PWM and PFM modes-targeting portable electronics, imaging, and storage markets.
FAQ
What is the maximum output current capability of the MIC33163YGJ-T5?
The MIC33163YGJ-T5 delivers up to 1A of continuous output current under specified thermal conditions (TJ ≤ +125°C, θJA = 50°C/W). Peak current limit is 2.5–3.3A depending on input voltage, providing robust overload protection. Derating applies above +85°C ambient; consult the "Maximum Output Current vs. Temperature" curve in the datasheet for precise thermal limits.
Does the MIC33163YGJ-T5 support adjustable output voltage, and how is it configured?
Yes, the MIC33163YGJ-T5 supports adjustable output voltage from 0.7V to 5V using an external resistor divider connected to the FB pin. The internal 0.7V reference is compared against the divider's midpoint; output voltage is calculated as VOUT = 0.7V × (1 + R1/R2). Example values for 1.8V (R1 = 340kΩ, R2 = 215kΩ) and 3.3V (R1 = 383kΩ, R2 = 102kΩ) are provided in the datasheet.
How does the HyperLight Load® (HLL) mode improve efficiency at light loads?
The MIC33163YGJ-T5 uses HyperLight Load®-a proprietary minimum on-/off-time PFM scheme-to reduce switching losses at light loads. Instead of fixed-frequency PWM, it pulses only when needed, achieving 85% efficiency at 1mA. This avoids constant gate-drive and transition losses inherent in forced-PWM regulators, extending battery life in standby or intermittent-use applications.
What is the purpose of the 100% duty cycle feature in the MIC33163YGJ-T5?
The 100% duty cycle feature allows the MIC33163YGJ-T5 to maintain regulation even when input voltage drops close to the output voltage-critical for battery-powered systems nearing end-of-discharge. In this mode, the high-side MOSFET remains fully on, minimizing dropout to just ILOAD × (RDS(ON) + DCRINDUCTOR), effectively functioning like a low-RDS(ON) LDO.
Can the MIC33163YGJ-T5 be used with a pre-biased output capacitor?
Yes, the MIC33163YGJ-T5 supports pre-bias start-up. Its soft-start circuitry (controlled via the SS pin) prevents reverse current flow into a pre-charged output capacitor during startup. When enabled, the internal reference ramps linearly from 0V, allowing the output to rise smoothly without discharging the existing bias-essential for hot-swap and multi-rail sequencing applications.
MIC33163YGJ-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 20-PowerTFQFN
- 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:
- 1A
- 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)
MIC33163YGJ-T5 FAQ
1.How can I place an order for MIC33163YGJ-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33163YGJ-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 MIC33163YGJ-T5 reliable?
The price and inventory of MIC33163YGJ-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33163YGJ-T5 is usually 5 days.
3.What payment methods are accepted for MIC33163YGJ-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33163YGJ-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33163YGJ-T5?
MIC33163YGJ-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33163YGJ-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 MIC33163YGJ-T5?
For technical support, including MIC33163YGJ-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33163YGJ-T5 requirements.
6.How does Aetrix verify that MIC33163YGJ-T5 is sourced from the original manufacturer or authorized distributors?
All MIC33163YGJ-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 MIC33163YGJ-T5 meets industry standards.
7.What is the process for return or replacement of MIC33163YGJ-T5?
All MIC33163YGJ-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC33163YGJ-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 MIC33163YGJ-T5 part is unused and in its original packaging.
Return procedure for MIC33163YGJ-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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