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Microchip Technology MIC23303YML-TR
- Part No.:
- MIC23303YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
MIC23303YML-TR.pdf
- Description:
- IC REG BUCK ADJ 3A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,439
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Product details
Overview
MIC23303YML-TR 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 output, achieves 93% peak efficiency, and uses a 12-pin 3mm × 3mm DFN package-designed for space-constrained portable processor core supplies.
For engineers reviewing the MIC23303YML-TR datasheet, MIC23303YML-TR pinout, MIC23303YML-TR application, or MIC23303YML-TR equivalent, key selection criteria include light-load efficiency (24µA quiescent current, 80% at 1mA), ultra-fast transient response in HyperLight Load mode, low-output-ripple operation (5mVpp in PWM mode), and thermal performance (θJA = 61°C/W) in high-density portable designs.
Technical Context
The MIC23303YML-TR employs a proprietary minimum-on/off-time control architecture enabling seamless transition between HyperLight Load™ (PFM-like discontinuous conduction) and fixed-frequency 4MHz PWM (CCM) modes. Its dual-mode operation maintains high efficiency across 100nA–3A load range while delivering <35mVpp ripple in HLL and <5mVpp in full PWM mode.
It integrates fully synchronous PMOS/NMOS power switches, supports external soft-start via SS pin (2.2nF min), and features precision feedback regulation (0.62V ±1.5% reference) with ±2.5% output voltage accuracy. Protection includes thermal shutdown (160°C), overcurrent limiting (3.5–10A), and undervoltage lockout (2.53V typ).
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 Voltage Range | Adjustable from 0.65V to 3.6V - enables precise core voltage scaling for modern low-voltage processors. |
| Max Output Current | 3A continuous - sufficient for application processor cores and high-performance SoCs in portable devices. |
| Switching Frequency | 4MHz nominal in CCM - allows use of sub-1µH inductors and compact ceramic capacitors for <1mm profile solutions. |
| Quiescent Current | 24µA typical - minimizes battery drain during standby in always-on subsystems. |
| Efficiency @ 1mA | 80% typical in DCM - critical for maintaining runtime in low-power sensor or GPS tracking states. |
| Power Good Threshold | 90% of VREF (0.62V) rising - provides reliable system reset sequencing with 20% hysteresis. |
Pinout & Package
Package: 12-pin 3mm × 3mm DFN (exposed thermal pad), RoHS-compliant, NiPdAu lead finish, halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - SW | Switch node | High-speed connection to inductor; carries full switching current and requires tight layout to minimize EMI. |
| 3 - PG | Open-drain Power Good | Signals valid output when FB ≥ 90% of 0.62V; requires external pull-up to VOUT for logic-level detection. |
| 4 - EN | Enable input | Logic-high (>0.9V) enables regulation; logic-low (<0.4V) reduces supply current to 0.01µA; must not float. |
| 5 - SNS | Output voltage sense | Direct connection to output capacitor anode for accurate load regulation and transient response. |
| 6 - FB | Feedback input | Compares resistor-divider output to internal 0.62V reference; sets VOUT = 0.62 × (1 + R3/R4). |
| 7 - SS | Soft-start timing | Capacitor-to-ground sets ramp time (e.g., 2.2nF → ~1.26ms); prevents inrush and overshoot at startup. |
| 8 - AGND | Analog ground | Reference return for control circuitry; must be isolated from high-current PGND paths to avoid noise coupling. |
| 9 - AVIN | Analog supply | Bias supply for error amplifier and reference; tied to PVIN but decoupled separately (1µF recommended). |
| 10, 11 - PVIN | Power input | Supplies MOSFET switches; requires local 4.7µF ceramic bypass to PGND for high-frequency noise suppression. |
| 12 - PGND | Power ground | High-current return path for switch node; must be low-inductance and separated from AGND loop. |
| EP - ePad | Thermal pad | Internally connected to PGND; soldered to PCB ground plane for thermal dissipation (θJC = 27°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| HyperLight Load™ mode | Proprietary PFM-like control enabling 80% efficiency at 1mA and ultra-fast load transients without external compensation. |
| Integrated synchronous MOSFETs | Low RDS(ON) (75mΩ PMOS / 55mΩ NMOS) eliminates external diode, reduces conduction loss, and improves light-load efficiency. |
| Programmable soft-start | External capacitor on SS pin controls output ramp rate (e.g., 2.2nF → 1.26ms), preventing inrush current and output overshoot. |
| Power Good output | Open-drain PG pin with 160µs delay and 20% hysteresis ensures reliable power sequencing for downstream logic and memory. |
| Thermal and current protection | Auto-recovering thermal shutdown (160°C) and cycle-by-cycle current limit (3.5–10A) protect against overload and PCB overheating. |
Applications
| Portable Media Players | GPS Navigation Devices |
|---|---|
Use Scenario: Powering ARM-based application processors and audio codecs in MP3/Bluetooth headphones with dynamic load profiles. IC Role / Device Role / Timing Role: Core voltage regulator supplying 1.2V/1.8V to CPU and DSP blocks with fast transient response to burst audio decoding. Use Value: HyperLight Load™ maintains >80% efficiency at µA standby currents, extending battery life by minimizing quiescent loss during playback pauses. |
Use Scenario: Delivering stable 1.2V core and 3.3V I/O rails in handheld GPS units operating under variable satellite signal conditions. IC Role / Device Role / Timing Role: Primary DC-DC converter for baseband SoC, synchronized to GNSS acquisition bursts requiring rapid voltage recovery. Use Value: 4MHz switching enables <1mm solution height using 0.33µH inductor and 22µF output cap-critical for slim form-factor enclosures. |
| Wi-Fi/WiMAX Modules | Digital Cameras |
Use Scenario: Supplying RF transceivers and baseband ICs in compact wireless modules where EMI and board area are tightly constrained. IC Role / Device Role / Timing Role: High-efficiency buck regulator with low output ripple (5mVpp) to prevent RF interference in 2.4GHz/5GHz bands. Use Value: Integrated MOSFETs and 4MHz operation reduce external component count to six, simplifying layout and lowering BOM cost. |
Use Scenario: Powering image sensor, ISP, and flash LED drivers in point-and-shoot cameras with intermittent high-current flash pulses. IC Role / Device Role / Timing Role: Main power stage supporting 3A peak loads during flash charging and sensor readout, with soft-start preventing shutter lag. Use Value: Programmable soft-start (via SS pin) and Power Good output enable precise power sequencing for sensor initialization and frame capture timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62363DSGR | 3A, 2.5–5.5V input, 4MHz, 18µA IQ, but no HyperLight Load™ - uses standard DCS-Control with lower light-load efficiency (~65% @ 1mA). | Lacks ultra-low-IQ and PFM-like transient response; less suitable for always-on GPS tracking or sensor wake cycles. | Prefer MIC23303YML-TR when >75% efficiency at sub-10mA loads is required. |
| RT8059GJ6 | 3A, 2.5–5.5V input, 2MHz max, 30µA IQ, integrated soft-start, but no Power Good output or adjustable frequency. | No PG pin limits system-level power sequencing; 2MHz switching requires larger inductors, increasing solution height. | Choose MIC23303YML-TR when PG signaling and <1mm profile are mandatory for portable designs. |
Compared with TPS62363DSGR and RT8059GJ6, the MIC23303YML-TR uniquely combines 4MHz operation, HyperLight Load™ efficiency down to 1mA, and a dedicated Power Good output-all in a 3mm × 3mm DFN-making it optimal for space- and battery-life-critical portable SoC power rails.
Availability
MIC23303YML-TR is available at Aetrix Electronics and suitable for portable media players, GPS navigation devices, and Wi-Fi module designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC23303YML-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 U.S.-based analog and mixed-signal semiconductor company headquartered in San Jose, CA, specializing in power management, interface, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC23303YML-TR belongs to Micrel's HyperLight Load™ synchronous buck regulator family, engineered specifically for ultra-thin portable electronics demanding high efficiency across wide load ranges and minimal solution footprint.
FAQ
What is the minimum output voltage supported by the MIC23303YML-TR?
The MIC23303YML-TR supports an adjustable output voltage down to 0.65V, set via an external resistor divider connected to the FB pin and referenced to its internal 0.62V feedback voltage. This enables direct core voltage regulation for modern low-voltage processors and FPGAs. The MIC23303YML-TR maintains ±2.5% output accuracy across temperature and line/load variations per its datasheet specifications.
Does the MIC23303YML-TR require external compensation components?
No, the MIC23303YML-TR is internally compensated and designed to be stable with a 0.33µH to 1.0µH inductor and a minimum 10µF X5R/X7R ceramic output capacitor. A 33pF feed-forward capacitor across the top feedback resistor is recommended to improve transient response, but no additional compensation network (e.g., type-II or type-III) is needed for basic operation.
How does the HyperLight Load™ mode improve efficiency at light loads?
The MIC23303YML-TR's HyperLight Load™ mode uses a proprietary minimum-on/off-time control scheme that reduces switching frequency under light loads-operating in discontinuous conduction mode with pulse-frequency modulation. This cuts gate-drive and switching losses, achieving 80% efficiency at 1mA and only 24µA quiescent current, far exceeding standard PWM regulators at sub-10mA loads.
What is the purpose of the SNS pin on the MIC23303YML-TR?
The SNS (Sense) pin on the MIC23303YML-TR provides Kelvin sensing of the output voltage directly at the load side of the output capacitor, improving regulation accuracy and transient response. It must be routed close to the capacitor anode-separate from the FB feedback path-to reject PCB IR drop and ensure stable voltage delivery under dynamic load steps.
Can the MIC23303YML-TR be used with input voltages below 2.7V?
No-the MIC23303YML-TR has a specified input voltage range of 2.7V to 5.5V. Operation below 2.7V violates the Absolute Maximum Ratings and triggers undervoltage lockout (UVLO turn-on threshold is 2.53V typical). Attempting to operate below this risks failure to start or unstable regulation, and is outside guaranteed specification.
MIC23303YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- HyperLight Load®
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TR FAQ
1.How can I place an order for MIC23303YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC23303YML-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 MIC23303YML-TR reliable?
The price and inventory of MIC23303YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC23303YML-TR is usually 5 days.
3.What payment methods are accepted for MIC23303YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC23303YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC23303YML-TR?
MIC23303YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC23303YML-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 MIC23303YML-TR?
For technical support, including MIC23303YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC23303YML-TR requirements.
6.How does Aetrix verify that MIC23303YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC23303YML-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 MIC23303YML-TR meets industry standards.
7.What is the process for return or replacement of MIC23303YML-TR?
All MIC23303YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC23303YML-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 MIC23303YML-TR part is unused and in its original packaging.
Return procedure for MIC23303YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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