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Microchip Technology MIC33164YGJ-TR
- Part No.:
- MIC33164YGJ-TR
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerTFQFN
- Datasheet:
-
MIC33164YGJ-TR.pdf
- Description:
- IC REG BUCK ADJ 1A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,243
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Product details
Overview
MIC33164YGJ-TR from Micrel is a 4MHz synchronous buck regulator with integrated inductor and HyperLight Load® (HLL) mode, delivering up to 1A output current, 100% duty cycle operation, and adjustable output voltage from 0.7V to 5V. It targets space-constrained point-of-load applications in portable devices and SSD storage systems where ultra-fast transient response and low quiescent current (33µA) are critical.
For engineers reviewing the MIC33164YGJ-TR datasheet, MIC33164YGJ-TR pinout, MIC33164YGJ-TR application, or MIC33164YGJ-TR equivalent, key selection considerations include its 20-pin 2.5mm × 3.0mm QFN package, integrated inductor architecture, auto-discharge capability (180Ω pull-down on SW), and HLL-mode efficiency optimization across light-to-heavy loads.
Technical Context
The MIC33164YGJ-TR implements a proprietary HyperLight Load® control loop using minimum on-/off-time pulse frequency modulation (PFM) at light loads (<220mA), transitioning seamlessly to fixed 4MHz PWM operation above that threshold. Its integrated power stage includes matched PMOS/NMOS switches with 0.13Ω typical RDS(ON) and an embedded inductor enabling full regulation down to 0.7V.
It features configurable soft-start via external capacitor on SS pin, open-drain power-good (PG) monitoring referenced to 90% of VOUT, and dedicated analog/ground separation (AVIN/AGND vs. PVIN/PGND) for noise-sensitive feedback stability. The 180Ω internal SW pull-down (exclusive to MIC33164 variant) enables automatic output discharge during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 4MHz nominal in PWM mode; enables compact external components and high-frequency noise filtering |
| Output Current | 1A continuous; supports demanding POL rails in portable and storage systems |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li-ion, USB, and 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 resistor divider |
| Shutdown Current | 0.1µA typical; ensures near-zero leakage during system sleep states |
| Efficiency | 85% at 1mA, up to 93% peak at 1A; maintained across load range by HLL + PWM hybrid control |
| 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 × 1.1mm QFN (GJ), RoHS-compliant, halogen-free, matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PVIN (Pins 1, 20) | Power Input Voltage | Supplies high-current path to internal MOSFETs; requires local 2.2µF+ ceramic decoupling to PGND |
| PGND (Pins 2, 8, 9) | Power Ground | Low-impedance return for switching currents; must be isolated from AGND to prevent noise coupling |
| SW (Pins 3–7) | Switch Node | Internal MOSFET output connected to integrated inductor; 180Ω auto-discharge enabled only on MIC33164YGJ-TR |
| VOUT (Pins 10–13) | Inductor Output | Regulated DC output; connects directly to 22µF+ ceramic output capacitor for ripple suppression |
| AGND (Pin 14) | Analog Ground | Reference ground for FB, SS, PG; ties to central star point shared with CIN/COUT/PGND for stability |
| AVIN (Pin 15) | Analog Input Voltage | Bias supply for control circuitry; tied to PVIN but filtered separately with 1µF capacitor |
| SS (Pin 16) | Soft-Start | Controls VOUT ramp-up time via external capacitor; prevents inrush and overshoot at startup |
| PG (Pin 17) | Power Good | Open-drain indicator asserting when VOUT reaches ≥90% of target; requires external pull-up resistor |
| FB (Pin 18) | Feedback | Senses output via resistor divider; compares to 0.7V reference to regulate VOUT precisely |
| EN (Pin 19) | Enable Input | Logic-controlled on/off; 0.8V typical turn-on threshold; must not float to avoid erratic operation |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + MOSFETs | Reduces total solution size to 4.6mm × 7mm; eliminates external magnetics and layout sensitivity |
| HyperLight Load® Mode | Enables PFM operation below 220mA, sustaining >85% efficiency at 1mA without compromising transient response |
| 100% Duty Cycle Operation | Permits dropout as low as RDS(ON) × ILOAD + DCR × ILOAD; extends battery runtime in low-VIN scenarios |
| Auto-Discharge (MIC33164 only) | 180Ω internal pull-down on SW node discharges VOUT rapidly after shutdown-critical for sequencing in multi-rail systems |
| Low-Radiated EMI | Meets EN55022 Class B limits due to monolithic integration of switcher and inductor, minimizing loop area |
| Configurable Soft-Start | External capacitor on SS pin sets ramp time (e.g., 1nF → ~575µs); supports pre-bias start-up without reverse current |
Applications
| 5V Point-of-Load (POL) | SSD Storage Systems |
|---|---|
Use Scenario: Local 3.3V or 2.5V rail generation from 5V motherboard supply in M.2 or U.2 SSD modules. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator providing stable, low-noise core voltage to NAND flash controllers and DRAM buffers. 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 NVMe controller ASICs requiring fast load-step response during burst read/write operations. IC Role / Device Role / Timing Role: High-efficiency POL regulator with ultra-fast transient recovery (<10µs) enabled by HLL mode and low-output-impedance design. Use Value: Maintains <±1% output regulation during 100mA–1A load steps; 33µA quiescent current extends idle power budget in low-activity states. |
| Portable Digital Cameras | Space-Constrained Industrial Sensors |
Use Scenario: Generating 1.8V image sensor bias and 2.8V lens actuator drive from single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Adjustable buck converter supporting multiple voltage domains with minimal external parts. Use Value: 100% duty cycle extends usable battery range down to 1.85V input; 2.5mm × 3.0mm QFN fits tight camera module footprints. | Use Scenario: Powering ultra-compact wireless sensor nodes (e.g., LoRaWAN edge devices) with strict size and battery-life requirements. IC Role / Device Role / Timing Role: Primary system regulator delivering 3.3V to MCU, RF transceiver, and analog front-end from coin-cell or energy-harvested source. Use Value: 0.1µA shutdown current preserves multi-year battery life; low-profile QFN enables conformal coating and sealed enclosure integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC33163YGJ-TR | No auto-discharge; SW pin lacks internal 180Ω pull-down | Suitable where controlled discharge is unnecessary or handled externally | Select when cost sensitivity outweighs need for integrated discharge |
| TI TPS6208818RTER | 2.5V–5.5V input, 1.8V fixed output, 2MHz switching, 0.95A max, no integrated inductor | Requires external inductor and compensation; smaller 2mm × 2mm WSON package | Choose for fixed-output simplicity and higher density if board space permits external magnetics |
Compared with MIC33163YGJ-TR, the MIC33164YGJ-TR adds mandatory auto-discharge for safe multi-rail sequencing, while the TPS6208818RTER trades integration for footprint reduction and fixed-output convenience-making it viable only when external inductor placement and layout control are feasible.
Availability
MIC33164YGJ-TR 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 MIC33164YGJ-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 leading global manufacturer of high-performance analog, power, and timing ICs before its acquisition by Microchip Technology in 2015; its legacy power products remain widely deployed in industrial and consumer systems.
The MIC33163/4 family was designed specifically for space-constrained, battery-sensitive applications requiring integrated power solutions with best-in-class light-load efficiency and rapid transient response-targeting portable electronics, storage, and imaging markets.
FAQ
What is the key functional difference between MIC33164YGJ-TR and MIC33163YGJ-TR?
The MIC33164YGJ-TR integrates a 180Ω pull-down resistor on the SW pin for automatic output discharge during shutdown, while the MIC33163YGJ-TR lacks this feature. This makes MIC33164YGJ-TR essential for applications requiring controlled power-down sequencing, such as multi-voltage FPGA or ASIC systems. Both share identical pinout, package, and core regulation functionality.
Does MIC33164YGJ-TR require external compensation components?
No, MIC33164YGJ-TR is internally compensated and stable with a standard 22µF X5R/X7R ceramic output capacitor. An external 15pF–68pF feedback capacitor (CFF) is recommended for optimal transient performance but is not required for basic stability. The device's monolithic architecture eliminates need for traditional Type-II or Type-III compensation networks.
What is the maximum ambient temperature at which MIC33164YGJ-TR can deliver full 1A output current?
At 5V input and 1.8V output, MIC33164YGJ-TR delivers full 1A output current up to +85°C ambient temperature with standard 2-layer PCB layout and 1in² copper pour. Derating begins above this point; at +100°C ambient, maximum sustainable output current drops to approximately 750mA per the "Maximum Output Current vs. Temperature" curve in the datasheet.
How does HyperLight Load® mode improve efficiency at light loads compared to standard PWM?
HyperLight Load® mode uses pulse frequency modulation (PFM) with programmable minimum on-/off-times instead of fixed-frequency PWM. At loads below 220mA, MIC33164YGJ-TR pulses only when needed-reducing gate-drive and switching losses dramatically. This achieves 85% efficiency at 1mA versus <40% for conventional 4MHz PWM, extending battery life in always-on sensor or standby circuits.
Can MIC33164YGJ-TR operate with input voltage equal to the desired output voltage?
Yes, MIC33164YGJ-TR supports 100% duty cycle operation, allowing it to maintain regulation even when input voltage approaches or equals the programmed output voltage (e.g., 3.3V IN → 3.3V OUT). In this mode, conduction occurs through the high-side MOSFET's RDS(ON) and inductor DCR, resulting in minimal dropout-critical for maximizing battery utilization in Li-ion powered devices.
MIC33164YGJ-TR 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)
MIC33164YGJ-TR FAQ
1.How can I place an order for MIC33164YGJ-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33164YGJ-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 MIC33164YGJ-TR reliable?
The price and inventory of MIC33164YGJ-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33164YGJ-TR is usually 5 days.
3.What payment methods are accepted for MIC33164YGJ-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33164YGJ-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33164YGJ-TR?
MIC33164YGJ-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33164YGJ-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 MIC33164YGJ-TR?
For technical support, including MIC33164YGJ-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33164YGJ-TR requirements.
6.How does Aetrix verify that MIC33164YGJ-TR is sourced from the original manufacturer or authorized distributors?
All MIC33164YGJ-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 MIC33164YGJ-TR meets industry standards.
7.What is the process for return or replacement of MIC33164YGJ-TR?
All MIC33164YGJ-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC33164YGJ-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 MIC33164YGJ-TR part is unused and in its original packaging.
Return procedure for MIC33164YGJ-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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