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Microchip Technology MIC23164YMT-TR
- Part No.:
- MIC23164YMT-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-UFDFN Exposed Pad
- Datasheet:
-
MIC23164YMT-TR.pdf
- Description:
- IC REG BUCK ADJ 2A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,773
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Product details
Overview
MIC23164YMT-TR from Micrel (now Microchip Technology) is a 4MHz, 2A synchronous buck regulator with HyperLight Load® mode, 100% duty cycle capability, active output discharge, and Power Good indicator - designed for space-constrained portable electronics requiring high light-load efficiency and fast transient response, such as cellular modems and GPS modules.
For engineers reviewing the MIC23164YMT-TR datasheet, MIC23164YMT-TR pinout, MIC23164YMT-TR application, or MIC23164YMT-TR equivalent, key selection considerations include its 2.7V–5.5V input range, adjustable output voltage via feedback divider, 33µA quiescent current, 180Ω active discharge FET, and 10-pin 2.0mm × 2.0mm Thin DFN package with thermal performance up to +125°C junction temperature.
Technical Context
The MIC23164YMT-TR employs a proprietary HyperLight Load® (HLL) control architecture combining minimum on/off time pulse-frequency modulation at light loads (<120mA) and fixed 4MHz PWM operation in continuous conduction mode (CCM), enabling ultra-fast load transients and low output ripple without external compensation. Its integrated PMOS/NMOS power stage supports 100% duty cycle for extended battery life in dropout conditions.
It integrates an open-drain Power Good (PG) output referenced to 0.7V internal feedback threshold, programmable soft-start via external capacitor, and dedicated analog (AGND) and power (PGND) ground paths to isolate noise-sensitive control circuitry from high-current switching loops - critical for stable regulation in RF-sensitive portable applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, Li-poly, and 3.3V/5V rail inputs without pre-regulation. |
| Output Current | 2A continuous - sufficient for processor core or SoC I/O rail supply in compact handheld devices. |
| Switching Frequency | 4MHz nominal - enables use of tiny 0.47µH inductor and small ceramic capacitors for <1mm profile solutions. |
| Quiescent Current | 33µA - maintains >85% efficiency at 1mA load, extending battery runtime in standby/sleep modes. |
| Feedback Reference | 0.7V ±3% - sets precise output voltage via external resistor divider; enables 0.7V–VIN adjustable range. |
| Active Discharge | 180Ω internal FET from SW to PGND - ensures rapid, controlled output discharge during disable, preventing back-powering. |
| Power Good Threshold | 90% of VOUT nominal (±5%) - provides reliable system reset or sequencing signal with 7% hysteresis. |
Pinout & Package
Package: 10-pin 2.0mm × 2.0mm Thin DFN (MT) with exposed thermal pad (ePad), RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SW | Switch Node | Internal PMOS/NMOS drain connection; carries high di/dt switching current - requires tight layout to minimize EMI and ringing. |
| 2 - EN | Enable Input | Logic-controlled shutdown; 0.8V typical turn-on threshold - must be actively driven (not floating) for reliable operation. |
| 3 - FB | Feedback Input | Senses output voltage via resistor divider; regulates to 0.7V reference - determines final VOUT accuracy and stability. |
| 4 - NC | No Connect | Not internally bonded - leave unconnected and unpopulated on PCB. |
| 5 - PG | Power Good Output | Open-drain indicator; pulled low when VOUT drops below 85–95% of target - requires external pull-up to VOUT or bias rail. |
| 6 - SS | Soft-Start Control | Connects to external capacitor (≥1nF) to linearly ramp VOUT and prevent inrush current or overshoot at startup. |
| 7 - AGND | Analog Ground | Reference for feedback, error amplifier, and control logic - must tie to clean star ground point separate from PGND. |
| 8 - AVIN | Analog Supply Input | Bypassed locally to AGND; powers internal bias circuitry - decouples noise from power-switching path. |
| 9 - PVIN | Power Input | Main input for high-current MOSFETs; requires low-ESR ceramic capacitor (≥2.2µF) placed adjacent to PVIN and PGND. |
| 10 - PGND | Power Ground | High-current return path for PVIN, SW, and output capacitor - must form low-inductance loop with PVIN and CIN. |
| ePad | Thermal Pad | Internally connected to PGND; essential for thermal dissipation - must be soldered to large copper pour for θJC = 45°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load® Mode | Enables PFM operation below ~120mA load, achieving 85% efficiency at 1mA while maintaining ultra-fast transient response. |
| 100% Duty Cycle Operation | Allows VOUT regulation down to VIN – dropout (effectively zero dropout), maximizing usable battery voltage range in portable systems. |
| Integrated Active Discharge | 180Ω FET switches between SW and PGND when disabled - eliminates need for external discharge circuitry and reduces BOM count. |
| 4MHz Fixed-Frequency PWM | Ensures predictable EMI profile and simplifies filtering; compatible with miniature 0.47µH inductors and 10µF X5R/X7R ceramic output caps. |
| Separate AGND and PGND Pins | Minimizes noise coupling between sensitive analog control circuitry and high-current power paths - improves regulation accuracy and stability. |
Applications
| Cellular Modems | Portable Navigation Devices (GPS) |
|---|---|
|
Use Scenario: Powering baseband processor and RF transceiver in LTE/5G modem modules where battery life and thermal constraints are critical. IC Role / Device Role / Timing Role: Primary DC/DC step-down regulator delivering stable, low-noise 1.2V–1.8V core voltage with fast load-step response to handle burst data transmission. Use Value: HyperLight Load® sustains >85% efficiency at idle current (1–10mA), while 4MHz switching minimizes solution size to fit within tight module footprints. |
Use Scenario: Supplying GNSS SoC and RF front-end in handheld GPS receivers operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Adjustable buck converter providing 3.3V I/O rail and 1.2V core rail with Power Good signaling for safe boot and brown-out detection. Use Value: 100% duty cycle extends operational time near battery end-of-discharge; active discharge prevents backfeed into powered-down peripherals. |
| WiFi/WiMax Modules | Digital Cameras |
|
Use Scenario: Regulating power for 2.4GHz/5GHz WiFi SoCs in compact IoT edge nodes and portable hotspots. IC Role / Device Role / Timing Role: High-efficiency, low-ripple power source supporting dynamic CPU frequency scaling and RF transmit bursts. Use Value: Ultra-low output ripple (<10mVpp) avoids interference with sensitive RF receivers; 2.0mm × 2.0mm DFN saves board area for multi-radio integration. |
Use Scenario: Powering image sensor, ISP, and display driver in pocket-sized digital cameras with strict height limits (<1mm). IC Role / Device Role / Timing Role: Compact 2A buck regulator delivering 1.8V and 3.3V rails with soft-start to prevent flash-trigger timing jitter. Use Value: Total solution height <1mm achieved using 0.47µH inductor and 10µF ceramic cap; SS pin enables precise startup timing control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | 2.25MHz switching, 300mA max output, no active discharge, 0.6V reference | Limited to lower current and less aggressive light-load optimization; lacks 100% duty cycle and PG output | Choose only for sub-300mA applications where cost and footprint are prioritized over efficiency and feature set. |
| RT8059ZSP | 3MHz switching, 2A output, no HLL mode, 0.6V reference, no active discharge | Higher quiescent current (60µA), slower transient response, no integrated discharge path | Acceptable for non-battery-critical industrial applications but unsuitable for GPS/cellular where standby efficiency and fast discharge matter. |
Compared with TPS62260DRVR and RT8059ZSP, the MIC23164YMT-TR delivers superior light-load efficiency (33µA IQ vs. ≥60µA), integrated active discharge, 100% duty cycle, and Power Good - making it uniquely suited for battery-powered portable systems demanding long runtime and robust power sequencing.
Availability
MIC23164YMT-TR is available at Aetrix Electronics and suitable for cellular modems, portable navigation devices (GPS), and WiFi/WiMax modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC23164YMT-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., acquired by Microchip Technology in 2015, specialized in high-performance analog, power management, and timing ICs for portable and communications markets.
The MIC23164YMT-TR belongs to Micrel's HyperLight Load® buck regulator family, engineered specifically for ultra-compact, battery-operated consumer electronics where efficiency across full load range, minimal solution size, and fast transient response are mandatory design requirements.
FAQ
What is the function of the SW pin on the MIC23164YMT-TR?
The SW (Switch) pin on the MIC23164YMT-TR is the internal connection point between the PMOS high-side and NMOS low-side power MOSFETs. It delivers switched voltage to the external inductor and carries high di/dt current during operation. In the MIC23164YMT-TR, this pin also connects to the internal 180Ω active discharge FET when the device is disabled - ensuring rapid, controlled output voltage decay. Proper PCB routing with minimal loop area is essential to limit EMI and voltage spikes.
Does the MIC23164YMT-TR support adjustable output voltage?
Yes, the MIC23164YMT-TR supports fully adjustable output voltage from 0.7V to VIN using an external resistor divider connected to the FB (feedback) pin. The internal reference is precisely 0.7V (±3%), and the output voltage is calculated as VOUT = 0.7V × (1 + R1/R2), where R1 is the top resistor and R2 the bottom resistor. This flexibility allows the MIC23164YMT-TR to generate common rails like 1.2V, 1.8V, 2.5V, or 3.3V without requiring multiple fixed-voltage variants.
How does the MIC23164YMT-TR achieve high efficiency at light loads?
The MIC23164YMT-TR achieves high light-load efficiency through its proprietary HyperLight Load® (HLL) mode - a minimum on/off time PFM scheme that reduces switching activity only when needed. At loads below ~120mA, the MIC23164YMT-TR enters discontinuous conduction mode, skipping pulses to maintain regulation while drawing just 33µA quiescent current. This architecture delivers up to 85% efficiency at 1mA, far exceeding standard PWM regulators, and eliminates the need for external LDOs in low-power states.
What is the purpose of the separate AGND and PGND pins on the MIC23164YMT-TR?
The MIC23164YMT-TR separates AGND (analog ground) and PGND (power ground) to isolate noise-sensitive control circuitry - including the error amplifier, reference, and soft-start logic - from high-current switching paths. AGND serves as the quiet reference for feedback and regulation, while PGND carries pulsed inductor return current. Routing these grounds to distinct low-impedance points prevents ground bounce from corrupting regulation accuracy and improves stability - especially critical when using small ceramic output capacitors.
Can the MIC23164YMT-TR operate with a 100% duty cycle, and why is that important?
Yes, the MIC23164YMT-TR supports true 100% duty cycle operation, meaning the high-side PMOS remains continuously on when VIN approaches VOUT. This eliminates dropout voltage, allowing the MIC23164YMT-TR to sustain regulated output even as the input battery discharges down to the output voltage level. For portable devices powered by single-cell Li-ion (2.7–4.2V), this maximizes usable battery capacity and runtime - a key advantage over buck regulators with fixed minimum off-time limitations.
MIC23164YMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 10-UFDFN Exposed Pad
- 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):
- 5.5V
- 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:
- 10-TDFN (2x2)
MIC23164YMT-TR FAQ
1.How can I place an order for MIC23164YMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23164YMT-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 MIC23164YMT-TR reliable?
The price and inventory of MIC23164YMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23164YMT-TR is usually 5 days.
3.What payment methods are accepted for MIC23164YMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23164YMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23164YMT-TR?
MIC23164YMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23164YMT-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 MIC23164YMT-TR?
For technical support, including MIC23164YMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23164YMT-TR requirements.
6.How does Aetrix verify that MIC23164YMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC23164YMT-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 MIC23164YMT-TR meets industry standards.
7.What is the process for return or replacement of MIC23164YMT-TR?
All MIC23164YMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23164YMT-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 MIC23164YMT-TR part is unused and in its original packaging.
Return procedure for MIC23164YMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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