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Microchip Technology MIC33164YGJ-T5
- Part No.:
- MIC33164YGJ-T5
- Manufacturer:
- Microchip Technology
- Package:
- 20-PowerTFQFN
- Datasheet:
-
MIC33164YGJ-T5.pdf
- Description:
- IC REG BUCK ADJ 1A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,996
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Product details
Overview
MIC33164YGJ-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 features 100% duty cycle operation, 33µA quiescent current, and a 20-pin 2.5mm × 3.0mm × 1.1mm QFN package - optimized for space-constrained portable devices and SSD power rails.
For engineers reviewing the MIC33164YGJ-T5 datasheet, MIC33164YGJ-T5 pinout, MIC33164YGJ-T5 application, or MIC33164YGJ-T5 equivalent, key selection criteria include its integrated inductor footprint (4.6mm × 7mm total solution), ultra-fast transient response in HLL mode, auto-discharge capability (180Ω SW pull-down), and thermal shutdown protection across –40°C to +125°C junction range.
Technical Context
The MIC33164YGJ-T5 implements 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 low-dropout operation when VIN approaches VOUT.
It integrates feedback regulation referenced to 0.7V ±2.5%, supports pre-bias start-up via configurable soft-start (SS pin), and provides open-drain power-good (PG) signaling with 85–95% VOUT threshold hysteresis. The device includes under-voltage lockout (2.53V turn-on), fold-back current limit (2.5–3.3A), and thermal shutdown at 160°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 4MHz nominal in PWM mode; enables compact external capacitor sizing and reduces EMI fundamental frequency. |
| Output Current | Up to 1A DC; sustained across full –40°C to +125°C junction temperature range with derating per ambient curves. |
| Input Voltage Range | 2.7V to 5.5V; compatible with single-cell Li-ion, 3.3V, and 5V rail inputs without external LDO pre-regulation. |
| Quiescent Current | 33µA typical; minimizes standby power loss in always-on subsystems such as real-time clocks or sensor wake logic. |
| Feedback Reference | 0.7V ±2.5% over temperature; enables precise output programming from 0.7V to 5V using standard resistor dividers. |
| Auto-Discharge | 180Ω internal pull-down on SW pin during shutdown (MIC33164-specific); safely discharges output capacitance without external circuitry. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis; prevents permanent damage during sustained overload or poor PCB heatsinking. |
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 | High-current input for internal MOSFETs; requires local 2.2µF ceramic decoupling to PGND to suppress high-frequency switching noise. |
| PGND (Pins 2, 8, 9) | Power Ground | Low-impedance return path for switch-node current; must be routed separately from AGND to avoid noise coupling into control loop. |
| SW (Pins 3–7) | Switch Node | Connection to integrated inductor's controller-side terminal; carries high dv/dt switching waveform; not for external connection. |
| VOUT (Pins 10–13) | Regulated Output | Inductor output node; connects directly to 22µF ceramic output capacitor; delivers up to 1A load current with <1% load regulation. |
| AGND (Pin 14) | Analog Ground | Reference ground for FB, SS, PG, and internal error amplifier; must tie to central star ground point shared with CIN/COUT/PGND. |
| AVIN (Pin 15) | Analog Supply | Bias supply for control circuitry; tied to PVIN but filtered with dedicated 1µF capacitor to reject PVIN switching noise. |
| SS (Pin 16) | Soft-Start Control | Capacitor-programmable ramp time (e.g., 1nF → ~575µs); prevents output overshoot and limits inrush current during startup. |
| PG (Pin 17) | Power-Good Indicator | Open-drain output asserting high when VOUT reaches 85–95% of target; requires external pull-up to VOUT or system rail. |
| FB (Pin 18) | Feedback Input | Connects to resistor divider from VOUT to AGND; compares against 0.7V internal reference to regulate output voltage. |
| EN (Pin 19) | Enable Input | Logic-level control (0.8V threshold); drives device into 0.1µA shutdown state when low; must not float. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Inductor + MOSFETs | Eliminates external magnetics and discrete FETs, reducing BOM count and PCB area to 4.6mm × 7mm total solution size. |
| HyperLight Load® Mode | Proprietary PFM control maintains >85% efficiency at 1mA load while enabling sub-10µs load transient recovery. |
| 100% Duty Cycle Operation | Enables dropout as low as IOUT × (RDS(ON) + DCR), extending battery runtime in Li-ion systems where VIN drops near VOUT. |
| Auto-Discharge (MIC33164 only) | 180Ω internal SW pull-down ensures rapid VOUT discharge during shutdown - critical for multi-rail sequencing and safety compliance. |
| Low-Radiated EMI | Meets EN55022 Class B emissions without external shielding or ferrite beads due to monolithic inductor integration and optimized layout. |
Applications
| 5V Point-of-Load (POL) | SSD Storage Systems |
|---|---|
Use Scenario: Local 3.3V or 1.8V rail generation from a 5V motherboard bus in embedded storage controllers. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator supplying core logic and NAND interface voltage with tight load regulation. Use Value: Integrated inductor eliminates layout sensitivity and EMI concerns common with discrete buck designs, ensuring signal integrity on high-speed SATA/NVMe lines. | Use Scenario: Powering DRAM cache, controller SoC, and NAND flash in M.2 or U.2 SSD modules with strict height constraints. IC Role / Device Role / Timing Role: Compact, thermally robust POL regulator delivering stable 1.2V/1.8V/3.3V rails under dynamic write/read current bursts. Use Value: Ultra-fast transient response (<10µs) and 93% peak efficiency minimize thermal rise in sealed SSD enclosures during sustained workloads. |
| Portable Digital Cameras | Space-Constrained Industrial Sensors |
Use Scenario: Powering image sensor, ISP, and display driver ICs in ultra-thin camera modules where board area is at premium. IC Role / Device Role / Timing Role: Single-chip buck solution replacing multi-component discrete regulators to meet 2.5mm × 3.0mm footprint limit. Use Value: 0.1µA shutdown current and 33µA quiescent current extend battery life during standby and preview modes without sacrificing wake-up speed. | Use Scenario: Providing isolated 2.5V or 3.3V bias for precision ADCs, op-amps, and wireless transceivers in compact IoT edge nodes. IC Role / Device Role / Timing Role: High-PSRR, low-noise POL regulator supporting analog signal chain integrity in noisy industrial environments. Use Value: Low output ripple (<10mVpp) with small 22µF ceramic output cap ensures <1 LSB error in 16-bit ADC conversions without added filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC33163YGJ-T5 | No auto-discharge; SW pin floats during shutdown | Suitable where controlled discharge is unnecessary or handled externally | Select when lowest BOM cost and identical performance except discharge requirement |
| TPS62864DLCR | 2.5V–5.5V input, 1A, 4MHz, integrated inductor, 0.6V reference, no auto-discharge | Requires external discharge circuit if needed; slightly higher quiescent current (65µA) | Choose for TI ecosystem compatibility or enhanced thermal metrics (θJA = 42°C/W vs. 50°C/W) |
Compared with MIC33164YGJ-T5, MIC33163YGJ-T5 lacks SW pull-down but matches all other electrical specs, while TPS62864DLCR offers tighter output accuracy (±1%) and lower thermal resistance but requires external discharge design effort and draws more quiescent current - making MIC33164YGJ-T5 optimal for fast-turnoff, battery-sensitive applications.
Availability
MIC33164YGJ-T5 is available at Aetrix Electronics and suitable for portable devices, SSD storage systems, space-constrained industrial sensors, and digital camera power rails requiring stable component supply, long-lifecycle support, and consistent parametric performance.
Supply support for MIC33164YGJ-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 leading global manufacturer of high-performance analog, power, and timing semiconductors before its acquisition by Microchip Technology in 2015; it pioneered integrated power modules with monolithic inductors.
The MIC33163/4 family was designed specifically for ultra-compact, high-efficiency point-of-load conversion in portable and embedded systems where PCB area, thermal headroom, and light-load efficiency are critical constraints.
FAQ
What is the purpose of the auto-discharge function in MIC33164YGJ-T5?
The auto-discharge function in MIC33164YGJ-T5 activates a 180Ω internal pull-down resistor on the SW pin during shutdown, rapidly discharging the output capacitor to zero volts. This ensures safe, predictable power-down sequencing in multi-rail systems and meets functional safety requirements for portable electronics. MIC33163YGJ-T5 lacks this feature, so external discharge circuitry would be required if needed.
How does MIC33164YGJ-T5 achieve ultra-fast transient response?
MIC33164YGJ-T5 achieves ultra-fast transient response through its HyperLight Load® (HLL) control architecture, which uses minimum on-/off-time PFM at light loads and transitions seamlessly to fixed 4MHz PWM above ~220mA. This eliminates traditional compensation limitations, enabling sub-10µs recovery from 50% load steps without external loop compensation components.
Can MIC33164YGJ-T5 operate with input voltage equal to output voltage?
Yes, MIC33164YGJ-T5 supports 100% duty cycle operation, allowing it to maintain regulation even when input voltage drops to within tens of millivolts of the programmed output voltage. In this mode, output voltage is determined by IOUT × (RDS(ON) + DCR), enabling extended battery runtime in single-cell Li-ion applications where VIN sags below VOUT.
What is the recommended output capacitor for MIC33164YGJ-T5?
The recommended output capacitor for MIC33164YGJ-T5 is a 22µF, X5R/X7R dielectric, 0603-size ceramic capacitor with ≤10mΩ ESR, such as TDK C1608X5R1A226M080AC. This value ensures stability, low output ripple (<10mVpp), and optimal transient response. Larger values improve ripple suppression but increase cost and board area without proportional benefit.
Does MIC33164YGJ-T5 require external compensation components?
No, MIC33164YGJ-T5 is internally compensated and designed to be stable with a 22µF ceramic output capacitor. An external 15pF–68pF feedback capacitor (CFF) is required across the FB pin and AGND for optimal regulation performance and noise immunity, but no RC compensation network is needed on the feedback path.
MIC33164YGJ-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)
MIC33164YGJ-T5 FAQ
1.How can I place an order for MIC33164YGJ-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC33164YGJ-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 MIC33164YGJ-T5 reliable?
The price and inventory of MIC33164YGJ-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC33164YGJ-T5 is usually 5 days.
3.What payment methods are accepted for MIC33164YGJ-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC33164YGJ-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC33164YGJ-T5?
MIC33164YGJ-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC33164YGJ-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 MIC33164YGJ-T5?
For technical support, including MIC33164YGJ-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC33164YGJ-T5 requirements.
6.How does Aetrix verify that MIC33164YGJ-T5 is sourced from the original manufacturer or authorized distributors?
All MIC33164YGJ-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 MIC33164YGJ-T5 meets industry standards.
7.What is the process for return or replacement of MIC33164YGJ-T5?
All MIC33164YGJ-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC33164YGJ-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 MIC33164YGJ-T5 part is unused and in its original packaging.
Return procedure for MIC33164YGJ-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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