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Microchip Technology MIC2225-4SYMT-TR
- Part No.:
- MIC2225-4SYMT-TR
- Manufacturer:
- Microchip Technology
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 10-UFDFN, 10-TMLF®
- Datasheet:
-
MIC2225-4SYMT-TR.pdf
- Description:
- IC REG DL BUCK/LNR 2MHZ 10TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,303
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Product details
Overview
MIC2225-4SYMT-TR from Micrel is a dual-output power management IC integrating a 2MHz 600mA synchronous buck regulator and a 300mA LDO, both operating from 2.7V–5.5V input. It delivers fixed 1.2V (buck) and 3.3V (LDO) outputs in a 10-pin 2mm × 2mm Thin MLF® package, targeting core/I/O rail generation for application processors and camera DSPs.
For engineers reviewing the MIC2225-4SYMT-TR datasheet, MIC2225-4SYMT-TR pinout, MIC2225-4SYMT-TR application, or MIC2225-4SYMT-TR equivalent, key selection criteria include fixed dual-voltage output pairing, ultra-low noise LDO performance (470 µVRMS), 2MHz switching frequency for compact filter design, and thermal/overcurrent protection across –40°C to +125°C junction range.
Technical Context
The MIC2225-4SYMT-TR implements independent PWM and LDO regulation paths with separate enable controls (EN and ENLDO), allowing asynchronous power sequencing. Its buck stage uses internal P/N-channel MOSFETs, supports 100% duty cycle, and maintains stable operation with only 2.2µF ceramic output capacitance.
The LDO section features 210mV dropout at 300mA, 43dB PSRR at 1kHz, and low-noise operation enabled by dedicated BIAS and AVIN pins decoupled via 0.1µF and 2.2µF capacitors respectively - ensuring analog circuitry isolation from high-frequency switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and regulated 3.3V/5V rails without external pre-regulation. |
| Buck Output | Fixed 1.2V @ 600mA - optimized for processor core voltage with >95% efficiency at mid-load and ultra-fast transient response. |
| LDO Output | Fixed 3.3V @ 300mA - provides low-noise I/O supply with 470 µVRMS integrated noise (10Hz–100kHz) and 210mV dropout at full load. |
| Switching Frequency | 2MHz ±10% - enables use of small 2.2µH inductors and 2.2µF ceramic output capacitors, minimizing board area. |
| Package | 10-pin 2mm × 2mm Thin MLF® - thermally enhanced Pb-free RoHS-compliant package with θJA = 90°C/W. |
| Operating Temperature | –40°C to +125°C junction - qualified for automotive infotainment and industrial portable applications. |
| Protection Features | Thermal shutdown (160°C), current limiting (0.675A min buck, 400mA LDO), UVLO (2.55V typ), and micropower shutdown (<5µA). |
Pinout & Package
Package: 10-pin 2mm × 2mm Thin MLF® (MT), Pb-free NiPdAu lead finish, halogen-free mold compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AGND | Analog ground reference | Separate low-noise return path for feedback, bias, and LDO control circuitry; must be isolated from PGND. |
| 2 LDO | LDO output | 3.3V regulated output requiring 2.2µF ceramic capacitor to AGND for stability and noise filtering. |
| 3 BIAS | Internal bias supply | Powered from AVIN via 6Ω resistor; requires 0.1µF bypass capacitor to AGND to suppress high-frequency noise. |
| 4 AVIN | Analog supply input | Supplies LDO and control circuitry; must be tied directly to VIN but routed separately to minimize switching noise coupling. |
| 5 FB | Buck feedback input | Internally connected to 1.2V output for fixed-option operation; no external divider needed. |
| 6 EN | Buck enable input | Active-high logic control; <0.2V disables buck stage, reducing quiescent current to <5µA. |
| 7 ENLDO | LDO enable input | Active-high logic control; <0.2V disables LDO, reducing its ground current to <5µA. |
| 8 VIN | Main power input | Supplies buck switches and drivers; requires 1µF ceramic capacitor close to VIN–PGND loop. |
| 9 SW | Buck switch node | Connects to inductor; high dv/dt node requiring short, low-inductance routing away from sensitive analog traces. |
| 10 PGND | Power ground | High-current return path for buck stage; must form tight loop with VIN and SW to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-regulator architecture | Eliminates need for discrete buck + LDO solution, reducing BOM count and PCB footprint by >40% vs. discrete implementation. |
| 2.2µF ceramic output capacitor support | Enables use of small, reliable, temperature-stable X5R/X7R MLCCs instead of larger tantalum or electrolytic capacitors. |
| Independent enable controls (EN/ENLDO) | Allows flexible power sequencing - e.g., bring up LDO first for I/O before enabling buck for core voltage. |
| Ultra-low LDO output noise | 470 µVRMS (10Hz–100kHz) meets stringent noise requirements for camera image sensors and ADC reference supplies. |
| 100% duty cycle capability | Permits operation down to VIN = VOUT, essential for battery-powered systems during brownout conditions. |
Applications
| Smartphone Application Processor Power | Digital Camera DSP Supply |
|---|---|
Use Scenario: Powers ARM-based application processor cores (1.2V) and interface I/O banks (3.3V) in slim smartphone designs. IC Role / Device Role / Timing Role: Dual-rail PMIC providing synchronized yet independently controllable voltage domains with fast load transient response. Use Value: Reduces total solution size by integrating two regulators into a 4mm² package while maintaining <1% output voltage accuracy over temperature. | Use Scenario: Supplies image signal processor (ISP) and CMOS sensor interface in mobile camera modules. IC Role / Device Role / Timing Role: Delivers ultra-low-noise 3.3V LDO output for sensor analog front-end and clean 1.2V buck output for digital logic. Use Value: 470 µVRMS LDO noise prevents image artifacts; 2MHz switching avoids interference with sensor pixel clock frequencies. |
| USB Peripheral Hub Controller | Portable Medical Sensor Node |
Use Scenario: Powers USB 2.0 hub controller IC requiring 1.2V core and 3.3V I/O from a 5V USB port. IC Role / Device Role / Timing Role: Efficient step-down + linear regulation pair enabling direct 5V-to-1.2V/3.3V conversion without intermediate stages. Use Value: >95% buck efficiency minimizes self-heating in sealed enclosures; LDO rejects USB port ripple for stable PHY operation. | Use Scenario: Powers low-power MCU and analog sensor signal chain in battery-operated wearable health monitors. IC Role / Device Role / Timing Role: Provides regulated rails with extended temperature range (–40°C to +125°C) and robust protection against battery voltage sag. Use Value: Micropower shutdown (<5µA) extends battery life; thermal/current limits ensure safe operation during sensor burst sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output DC-DC + LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | Single 600mA buck only (no integrated LDO); requires external LDO for second rail. | Lacks native dual-rail integration - increases layout complexity and component count for 1.2V/3.3V systems. | Select when LDO requirements are minimal or when using a higher-performance standalone LDO is preferred. |
| MAX8646ETE+ | 600mA buck + 300mA LDO, but fixed 1.2V/2.85V outputs and 3mm × 3mm TQFN-16 package. | Output voltage pair mismatch (2.85V vs. 3.3V) may require level-shifting for 3.3V I/O interfaces. | Choose when 2.85V LDO is acceptable and larger package footprint is tolerable for improved thermal margin. |
Compared with TPS62231DRYR and MAX8646ETE+, the MIC2225-4SYMT-TR uniquely delivers matched 1.2V/3.3V outputs in the smallest footprint (4mm²), with integrated LDO noise performance optimized for imaging and precision analog loads - eliminating external filtering components required by alternatives.
Availability
MIC2225-4SYMT-TR is available at Aetrix Electronics and suitable for smartphone power management, camera module design, and USB peripheral development requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC2225-4SYMT-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 semiconductor company specializing in power management, timing, and interface ICs, acquired by Microchip Technology in 2015.
The MIC2225 product line was designed for space-constrained portable electronics requiring highly integrated, low-noise dual-rail power solutions with minimal external components.
FAQ
What are the fixed output voltages of the MIC2225-4SYMT-TR?
The MIC2225-4SYMT-TR provides fixed 1.2V from its synchronous buck regulator and fixed 3.3V from its integrated LDO, as indicated by the "-4S" suffix in the part number per Micrel's ordering guide. These values are factory-trimmed and do not require external feedback resistors.
Does the MIC2225-4SYMT-TR require external compensation components?
No, the MIC2225-4SYMT-TR uses internal Type III compensation optimized for 2.2µH inductors and 2.2µF ceramic output capacitors. No external compensation network is needed - simplifying design and improving reliability across temperature and manufacturing variation.
Can the buck and LDO sections of the MIC2225-4SYMT-TR be enabled independently?
Yes, the MIC2225-4SYMT-TR features separate enable inputs: EN controls the buck regulator and ENLDO controls the LDO. Both are active-high logic inputs with thresholds of 1.0V (high) and 0.2V (low), enabling flexible power sequencing in multi-rail systems.
What is the thermal performance of the MIC2225-4SYMT-TR in its Thin MLF® package?
The MIC2225-4SYMT-TR has a junction-to-ambient thermal resistance (θJA) of 90°C/W in the 10-pin 2mm × 2mm Thin MLF® package. Its thermal shutdown activates at 160°C with 23°C hysteresis, protecting against sustained overload or poor PCB copper pour conditions.
Is the MIC2225-4SYMT-TR compatible with standard PCB assembly processes?
Yes, the MIC2225-4SYMT-TR uses a Pb-free NiPdAu lead finish and halogen-free mold compound, meeting RoHS and JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements. It is compatible with standard reflow profiles and automated optical inspection (AOI) due to its exposed pad-less MLF structure.
MIC2225-4SYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-UFDFN, 10-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 2MHz
- Voltage/Current - Output 1:
- 1.2V, 600mA
- Voltage/Current - Output 2:
- 3.3V, 300mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TMLF® (2x2)
MIC2225-4SYMT-TR FAQ
1.How can I place an order for MIC2225-4SYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2225-4SYMT-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 MIC2225-4SYMT-TR reliable?
The price and inventory of MIC2225-4SYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2225-4SYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC2225-4SYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2225-4SYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2225-4SYMT-TR?
MIC2225-4SYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2225-4SYMT-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 MIC2225-4SYMT-TR?
For technical support, including MIC2225-4SYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2225-4SYMT-TR requirements.
6.How does Aetrix verify that MIC2225-4SYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC2225-4SYMT-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 MIC2225-4SYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC2225-4SYMT-TR?
All MIC2225-4SYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2225-4SYMT-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 MIC2225-4SYMT-TR part is unused and in its original packaging.
Return procedure for MIC2225-4SYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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