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Microchip Technology MIC23303YML-T5
- Part No.:
- MIC23303YML-T5
- Manufacturer:
- Microchip Technology
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
MIC23303YML-T5.pdf
- Description:
- IC REG BUCK ADJ 3A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
MIC23303YML-T5 from Micrel is a 4MHz synchronous buck regulator delivering up to 3A output current with HyperLight Load™ mode, Power Good indicator, and programmable soft-start. It operates from 2.7V–5.5V input, regulates down to 0.65V, achieves 93% peak efficiency, and targets processor core voltage rails in space-constrained portable electronics.
For engineers reviewing the MIC23303YML-T5 datasheet, MIC23303YML-T5 pinout, MIC23303YML-T5 application, or MIC23303YML-T5 equivalent, key selection factors include its 24µA quiescent current, 35mVpp ripple in HyperLight Load mode, 12-pin 3mm × 3mm DFN package, thermal shutdown at 160°C, and adjustable feedback architecture supporting 0.65V–3.6V output.
Technical Context
The MIC23303YML-T5 uses a proprietary minimum-on/off-time control architecture enabling seamless transition between HyperLight Load (PFM) and continuous conduction mode (PWM) at ~300mA load. Its integrated PMOS/NMOS power switches eliminate external diode requirements and reduce conduction losses.
Feedback regulation relies on a precise 0.62V internal reference with ±2.5% output voltage accuracy; Power Good asserts when FB reaches 90% of VREF with 160µs delay and 20% hysteresis. Soft-start timing is externally set via capacitor on SS pin (e.g., 2.2nF → 1.26ms).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion and USB-powered systems without pre-regulation. |
| Output Current | Up to 3A - sufficient for ARM Cortex-A/M cores and FPGA I/O banks in portable devices. |
| Switching Frequency | 4MHz in CCM - enables use of sub-1µH inductors and <1mm profile solutions. |
| Quiescent Current | 24µA typical - extends battery life in always-on subsystems like GPS receivers. |
| Output Ripple | 35mVpp in HLL mode - maintains clean supply for noise-sensitive RF sections without large bulk caps. |
| Efficiency | 93% peak at full load; 80% at 1mA - sustains high conversion efficiency across entire operating range. |
| Thermal Protection | 160°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
Pinout & Package
Package: 12-pin 3mm × 3mm DFN with exposed thermal pad (ePad), RoHS-compliant NiPdAu finish, halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch Node Output | Connects directly to inductor; carries high-frequency pulsed current - requires short, low-inductance routing. |
| 3 PG | Open-Drain Power Good | Asserts logic-low when output is within 5–10% of target; requires external pull-up to VOUT for system sequencing. |
| 4 EN | Enable Input | Active-high logic interface; threshold 0.4–1.2V - compatible with 1.8V/3.3V GPIOs; floating state disables device. |
| 5 SNS | Output Voltage Sense | Direct connection to output capacitor anode - minimizes IR drop error for tight load regulation. |
| 6 FB | Feedback Input | Compares divider output against 0.62V reference; sets VOUT = 0.62 × (1 + R3/R4) for adjustable configurations. |
| 7 SS | Soft-Start Control | Capacitor-to-ground sets ramp time (e.g., 2.2nF → 1.26ms); prevents inrush current and overshoot at startup. |
| 8 AGND | Analog Ground | Reference ground for control circuitry - must be isolated from high-current PGND paths to avoid noise coupling. |
| 9 AVIN | Analog Supply Input | Bias rail for internal regulators; tied to PVIN but filtered separately with 1µF ceramic for noise immunity. |
| 10, 11 PVIN | Power Input | Main input for MOSFET drivers; requires ≥4.7µF local bypass to PGND for high-frequency stability. |
| 12 PGND | Power Ground | High-current return path for switching loop - must form minimal-area loop with PVIN and SW pins. |
| EP ePad | Thermal Pad | Internally connected to PGND; soldered to PCB ground plane for θJC = 27°C/W thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load™ Mode | Proprietary PFM control maintaining >80% efficiency at 1mA while delivering ultra-fast transient response (<10µs). |
| Integrated Power Switches | Fully integrated 75mΩ PMOS and 55mΩ NMOS - eliminates external MOSFETs and gate drivers, reducing BOM count by 4+ components. |
| Programmable Soft-Start | Externally adjustable rise time (1.26ms typical with 2.2nF) - prevents input voltage droop and output overshoot during power-up. |
| Low-Ripple Operation | 5mVpp ripple in full PWM mode and 35mVpp in HLL mode - enables use of small 10µF ceramic output capacitors. |
| Robust Protection Suite | Thermal shutdown (160°C), cycle-by-cycle current limit (3.5–10A), undervoltage lockout (2.53V turn-on), and ESD-hardened design (1.5kΩ/100pF HBM). |
Applications
| Portable Navigation Devices (GPS) | WiFi/WiMax Modules |
|---|---|
Use Scenario: Powering GPS baseband processors requiring stable 1.2V/1.8V rails with fast load transients during satellite acquisition. IC Role / Device Role / Timing Role: Core voltage regulator supplying CPU and RF front-end; delivers 3A peak during burst-mode operation. Use Value: HyperLight Load mode maintains >85% efficiency at standby currents (<100µA), extending battery runtime between location fixes. |
Use Scenario: Regulating power for 802.11n/ac radio ICs with dynamic current demands from 1mA (sleep) to 2.5A (transmit). IC Role / Device Role / Timing Role: Primary DC-DC converter for WLAN SoC; provides low-noise 3.3V supply with <35mVpp ripple. Use Value: 4MHz switching allows compact 0.33µH inductor and 22µF output cap - achieving <1mm height in M.2 module designs. |
| Digital Cameras | Wireless LAN Cards |
Use Scenario: Supplying image sensor and ISP cores that draw pulsed 2A loads during frame capture and low µA currents during idle. IC Role / Device Role / Timing Role: Adjustable buck regulator setting 1.1V–1.5V for sensor analog front-end and digital logic domains. Use Value: 24µA quiescent current minimizes dark current leakage in always-on preview mode, preserving battery for critical shots. |
Use Scenario: Providing regulated 1.8V/2.5V to PCIe-based wireless adapters in ultrabooks and mini-PCs with strict thermal envelopes. IC Role / Device Role / Timing Role: Point-of-load regulator adjacent to WLAN chipset; uses ePad for direct thermal coupling to chassis ground. Use Value: θJA = 61°C/W enables full 3A operation at 50°C ambient without heatsinks - simplifying mechanical design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62361BDSCT | 2.5V–5.5V input; 3A max; 2.5MHz switching; 18µA IQ; fixed 1.2V/1.5V/1.8V outputs only | Lacks adjustable output and Power Good; optimized for fixed-voltage DDR memory rails | Select when board space permits larger inductor and fixed output suffices; not suitable for processor core scaling. |
| RT8059GJ6F | 2.5V–5.5V input; 3A max; 3MHz switching; 35µA IQ; adjustable output; no Power Good output | Missing PG signal eliminates safe power sequencing for multi-rail SoCs | Choose where system-level monitoring replaces PG functionality; verify thermal performance with θJA = 75°C/W. |
Compared with TPS62361BDSCT and RT8059GJ6F, the MIC23303YML-T5 uniquely combines adjustable output, Power Good signaling, 4MHz operation, and HyperLight Load efficiency - making it optimal for dynamically scaled processor cores requiring both precision sequencing and ultra-low standby loss.
Availability
MIC23303YML-T5 is available at Aetrix Electronics and suitable for portable navigation devices, WiFi modules, digital cameras, and wireless LAN cards requiring stable component supply with long-term production support.
Supply support for MIC23303YML-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; known for high-performance power management and timing solutions.
The MIC23303 belongs to Micrel's HyperLight Load™ synchronous buck regulator product line, engineered specifically for battery-powered portable electronics demanding ultra-low IQ, fast transient response, and minimal solution footprint.
FAQ
What is the minimum output voltage supported by the MIC23303YML-T5?
The MIC23303YML-T5 supports output voltages down to 0.65V using an external resistor divider on the FB pin. Its internal 0.62V reference and ±2.5% output voltage accuracy enable precise low-voltage regulation required for modern processor cores and FPGAs. The MIC23303YML-T5 achieves this while maintaining 93% peak efficiency and 80% efficiency at 1mA load.
How does the HyperLight Load™ mode improve efficiency at light loads?
HyperLight Load™ mode implements a pulse-frequency modulation (PFM) scheme with minimum on/off times, activating switching only when needed to maintain regulation. This reduces gate drive and transition losses, enabling the MIC23303YML-T5 to sustain 80% efficiency at 1mA while drawing just 24µA quiescent current - critical for battery longevity in always-on portable functions.
What is the purpose of the SNS pin on the MIC23303YML-T5?
The SNS (Sense) pin on the MIC23303YML-T5 provides Kelvin sensing of the output voltage directly at the load, compensating for IR drop across PCB traces and connectors. Connecting SNS to the output capacitor anode ensures accurate regulation under dynamic load conditions and improves load transient response - a key requirement for powering sensitive RF and imaging circuits with the MIC23303YML-T5.
Can the MIC23303YML-T5 be used with a 0.33µH inductor?
Yes, the MIC23303YML-T5 is explicitly designed for use with inductors as low as 0.33µH, enabling ultra-compact solutions. A 0.33µH inductor optimizes transient response and efficiency in continuous conduction mode, and the MIC23303YML-T5's 4MHz switching frequency ensures stable operation with this value while supporting total solution heights under 1mm.
What thermal considerations apply to the MIC23303YML-T5 in a 3mm × 3mm DFN package?
The MIC23303YML-T5 has θJA = 61°C/W and θJC = 27°C/W in its 12-pin 3mm × 3mm DFN package. Effective thermal management requires soldering the ePad to a solid PCB ground plane; with proper layout, the MIC23303YML-T5 sustains 3A output at 50°C ambient without exceeding its 125°C junction limit - verified in thermal calculations using PDISS = 0.67W and RθJA.
MIC23303YML-T5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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):
- 0.65V
- Voltage - Output (Max):
- 3.6V
- Current - Output:
- 3A
- Frequency - Switching:
- 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (3x3)
MIC23303YML-T5 FAQ
1.How can I place an order for MIC23303YML-T5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23303YML-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 MIC23303YML-T5 reliable?
The price and inventory of MIC23303YML-T5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23303YML-T5 is usually 5 days.
3.What payment methods are accepted for MIC23303YML-T5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23303YML-T5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23303YML-T5?
MIC23303YML-T5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23303YML-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 MIC23303YML-T5?
For technical support, including MIC23303YML-T5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23303YML-T5 requirements.
6.How does Aetrix verify that MIC23303YML-T5 is sourced from the original manufacturer or authorized distributors?
All MIC23303YML-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 MIC23303YML-T5 meets industry standards.
7.What is the process for return or replacement of MIC23303YML-T5?
All MIC23303YML-T5 units undergo pre-shipment inspection (PSI). If there is an issue with MIC23303YML-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 MIC23303YML-T5 part is unused and in its original packaging.
Return procedure for MIC23303YML-T5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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