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Microchip Technology MIC2285YML-TR
- Part No.:
- MIC2285YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2285YML-TR.pdf
- Description:
- IC REG BUCK ADJ 500MA 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:5,773
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Product details
Overview
MIC2285YML-TR from Micrel is an adjustable-output, 8MHz synchronous buck regulator with integrated LOWQ™ LDO standby mode, operating from 2.7V to 5.5V input and delivering up to 500mA in PWM mode or 60mA in LDO mode while drawing only 20µA quiescent current. It features 100% duty cycle capability, 75µVrms output noise in LDO mode, and uses a 0.47µH inductor for ultra-compact portable power designs.
For engineers reviewing the MIC2285YML-TR datasheet, MIC2285YML-TR pinout, MIC2285YML-TR application, or MIC2285YML-TR equivalent, this device supports critical low-noise, battery-sensitive use cases including cellular phone baseband power, PDA core voltage regulation, USB peripheral rail generation, and fast-transient load switching between PWM and LDO modes.
Technical Context
The MIC2285YML-TR integrates dual regulation architectures: a constant-frequency 8MHz PWM buck converter with internal high-side P-channel and low-side N-channel MOSFETs, and a parallel low-noise linear regulator (LDO) enabled via the LOWQ pin. Its feedback loop uses a 1.0V reference and supports adjustable output down to 1.0V via external resistor divider.
Switching operation is disabled in LOWQ mode, isolating the SW node and routing regulation entirely through the LDO path-eliminating switching ripple while maintaining tight load regulation (±1% over 100µA–50mA). The BIAS pin requires an RC filter (20.5Ω + 100nF) to stabilize internal bias circuitry, and AVIN must be tied to VIN with careful noise isolation from PGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, Li-polymer, and 3.3V/5V system rails without pre-regulation. |
| Output Current (PWM) | Up to 500mA - sufficient for baseband processors, RF transceivers, and memory subsystems in handheld devices. |
| Output Current (LDO) | 60mA - enables low-power sleep states (e.g., modem standby) with ultra-low noise and no burst-mode artifacts. |
| Quiescent Current (LDO) | 20µA typical - extends battery life in always-on, low-duty-cycle applications like real-time clocks or sensor wake-up circuits. |
| Oscillator Frequency | 7.2–8.8MHz (typ. 8MHz) - allows use of sub-1mm-height 0.47µH inductors and minimizes output capacitor size. |
| Feedback Reference | 1.0V ±2% - enables precise, temperature-stable output setting from 1.0V to ≥5V using standard resistor ratios. |
| Maximum Duty Cycle | 100% - supports operation with minimal input-to-output differential (e.g., 3.3V out from 3.6V input), reducing dropout losses. |
| Output Noise (LDO) | 75µVrms (10Hz–100kHz) - meets stringent analog/RF supply requirements without additional LC filtering. |
Pinout & Package
Package: 10-pin 3mm × 3mm MLF™ (MicroLeadFrame) with exposed thermal pad (EP), rated for –40°C to +125°C junction temperature and θJA = 60°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AGND | Analog ground reference | Separate low-current return path for feedback, bias, and control circuitry; must be isolated from PGND to prevent noise coupling. |
| 2 LDO | LDO output terminal | Connects directly to VOUT; provides regulated output in LOWQ mode; high-impedance in PWM mode. |
| 3 BIAS | Internal bias supply input | Requires RC filter (20.5Ω + 100nF) from VIN to suppress high-frequency noise affecting reference stability. |
| 4 AVIN | Analog supply input | Must be tied to VIN but routed separately with local 1µF bypass to minimize switching noise injection into LDO and error amplifier. |
| 5 FB | Feedback input | Senses output voltage via external resistor divider; 1V reference enables accurate adjustable outputs down to 1.0V. |
| 6 EN | Enable control input | Logic-low disables entire IC (<5µA shutdown current); open-drain or logic-compatible drive required. |
| 7 LOWQ | Mode select input | Logic-low activates LDO mode (20µA IQ); logic-high enables 8MHz PWM mode (500mA capability). |
| 8 VIN | Main power input | Supplies internal MOSFETs and drivers; requires 1µF ceramic bypass close to VIN–PGND loop. |
| 9 SW | Power switch node | Connects to inductor; high dv/dt node-must be short, shielded, and远离 sensitive analog traces. |
| 10 PGND | Power ground return | High-current return path for PWM switching; forms tight loop with VIN and SW to minimize EMI and voltage spikes. |
| EP | Exposed thermal pad | Internally connected to GND; must be soldered to PCB thermal plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| LOWQ™ dual-mode architecture | Seamless handoff between 500mA PWM and 60mA LDO modes via single logic pin-enables optimal efficiency across full load range without compromising noise or transient response. |
| Ultra-low-noise LDO mode | 75µVrms output noise eliminates need for post-regulation filters in RF/analog supply chains, preserving signal integrity in cellular front-ends and audio codecs. |
| 8MHz fixed-frequency PWM | Enables use of 0.47µH inductors ≤0.8mm height, supporting <1mm profile power solutions ideal for slim mobile form factors and wearables. |
| Fully integrated power stage | Internal P-channel high-side and N-channel low-side MOSFETs eliminate external FETs and gate drivers-reducing BOM count and layout complexity. |
| 100% duty cycle operation | Permits regulation at near-zero input–output differential (e.g., 3.3V out from 3.4V input), maximizing usable battery voltage range in Li-ion systems. |
| Micropower shutdown | <5µA shutdown current with EN pin low-critical for long-term storage or emergency power-off states in battery-backed systems. |
Applications
| Cellular Phone Baseband Power | PDA Core Voltage Regulation |
|---|---|
|
Use Scenario: Supplying 1.2V–1.8V core voltage to ARM-based application processors during active and deep-sleep states. IC Role / Device Role / Timing Role: Primary DC-DC converter with dynamic mode switching-PWM during CPU bursts, LOWQ LDO during idle/suspend cycles. Use Value: Extends talk time by >15% vs. burst-mode regulators due to 20µA LDO quiescent current and eliminates RF interference from low-frequency ripple. |
Use Scenario: Generating stable 3.3V I/O and 1.5V memory rails for flash storage and display controllers in handheld PDAs. IC Role / Device Role / Timing Role: Dual-rail power source with independent enable and LOWQ control per rail; supports rapid wake-up from hibernation. Use Value: Achieves <10µs output recovery from LDO-to-PWM transition, preventing brownout during sudden load steps from touch-screen or backlight activation. |
| USB Peripheral Rail Generation | Low-Power Sensor Node Supply |
|
Use Scenario: Providing clean 3.3V or 5V power to USB 2.0 transceivers, hubs, and OTG peripherals from a 5V bus or battery source. IC Role / Device Role / Timing Role: Efficient step-down regulator with LDO mode for suspend/resume compliance-meets USB 2.0 <500µA suspend current requirement. Use Value: Meets USB electrical specifications without external LDO post-regulation, reducing component count and board area by 30%. |
Use Scenario: Powering ultra-low-power environmental sensors (e.g., temperature, humidity) with intermittent 10ms wake-up bursts every 60 seconds. IC Role / Device Role / Timing Role: Always-on supply with automatic LOWQ activation during 99.9% sleep time; PWM triggered only during measurement/communication. Use Value: Enables >2-year battery life on CR2032 coin cell by limiting average current to <1.2µA-validated across –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator with LDO standby applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz switching frequency; 25µA LDO IQ; no 100% duty cycle; requires external compensation. | Lower switching frequency increases inductor size; less suitable for space-constrained 1mm-profile designs. | Prefer when lower EMI sensitivity outweighs size constraints and 100% duty cycle is not required. |
| MAX1724EZT+T | 1.5MHz frequency; 22µA LDO IQ; fixed 3.3V/5V outputs only; no adjustable option. | Lacks FB pin flexibility-cannot support custom voltages below 3.3V needed for modern SoC cores. | Select only for fixed-voltage legacy designs where footprint compatibility with MAX1724 package is mandatory. |
Compared with TPS62231DRVR and MAX1724EZT+T, the MIC2285YML-TR uniquely combines 8MHz operation, 100% duty cycle, adjustable output down to 1.0V, and 75µVrms LDO noise-making it the only choice for next-gen compact, multi-rail, battery-critical portable systems requiring both high efficiency and ultra-low noise.
Availability
MIC2285YML-TR is available at Aetrix Electronics and suitable for cellular phone baseband power, PDA core voltage regulation, and USB peripheral rail generation requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for MIC2285YML-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 specializing in power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015.
The MIC2285 product line was designed specifically for portable electronics requiring dynamic power mode switching, ultra-low quiescent current, and minimal PCB footprint-targeting cellular, PDA, and USB-powered devices circa 2006.
FAQ
What is the function of the LOWQ pin on the MIC2285YML-TR?
The LOWQ pin on the MIC2285YML-TR controls the regulator's operating mode: pulling it low (<0.5V) activates the LOWQ™ LDO mode (20µA IQ, 60mA output), while pulling it high (>1.5V) enables 8MHz PWM mode (500mA output). This pin enables seamless, externally controlled transitions between high-efficiency switching and ultra-low-noise linear regulation-without requiring external sequencing or firmware intervention. The MIC2285YML-TR uses this pin to eliminate switching artifacts during sleep states while maintaining fast wake-up response.
Can the MIC2285YML-TR operate with a 1.0V output voltage?
Yes, the MIC2285YML-TR supports adjustable output voltages down to 1.0V using the FB pin and an external resistor divider, based on its 1.0V ±2% internal reference. For a 1.0V output, R2 is left open and R1 connects FB directly to VOUT. This configuration is explicitly validated in the datasheet's Typical Application Circuit and used in production designs for low-voltage SoC cores. The MIC2285YML-TR maintains ±1% load regulation across 100µA–50mA in LDO mode at 1.0V, ensuring stable operation under light loads.
What inductor value is required for the MIC2285YML-TR?
The MIC2285YML-TR is optimized for a 0.47µH shielded power inductor, as specified in the datasheet's Applications Information and Typical Application Circuit. This value enables stable 8MHz operation with minimal peak current ripple and supports sub-1mm profile designs. Inductors such as Murata LQM21PNR47M00 or Coilcraft DO2010-501ML are validated alternatives. Using values significantly outside 0.47µH (e.g., <0.33µH or >1.0µH) risks instability, reduced efficiency, or failure to meet transient response specs-verified across –40°C to +125°C for the MIC2285YML-TR.
Does the MIC2285YML-TR require separate input and analog supplies?
Yes-the MIC2285YML-TR has dedicated VIN (power switches) and AVIN (analog/LDO circuitry) pins that must both be connected to the same input rail, but with strict layout separation: AVIN requires its own 1µF bypass capacitor and must be routed away from high-dv/dt nodes like SW and PGND to prevent noise coupling. The datasheet mandates this split to preserve 75µVrms LDO noise performance and reference stability. Failure to isolate AVIN from VIN switching noise degrades MIC2285YML-TR LDO mode accuracy and increases output ripple.
What protection features does the MIC2285YML-TR include?
The MIC2285YML-TR integrates thermal shutdown (160°C trip, 20°C hysteresis), overcurrent limiting in PWM mode (0.675–1.85A), micropower shutdown (<5µA), and under-voltage lockout (2.45–2.65V turn-on with 100mV hysteresis). These protections are fully internal and require no external components. All functions are tested and guaranteed across the –40°C to +125°C junction range. The MIC2285YML-TR also includes ESD protection rated to 3kV HBM, safeguarding against handling damage during assembly.
MIC2285YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- 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):
- 1V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 500mA
- Frequency - Switching:
- 8MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2285YML-TR FAQ
1.How can I place an order for MIC2285YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2285YML-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 MIC2285YML-TR reliable?
The price and inventory of MIC2285YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2285YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2285YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2285YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2285YML-TR?
MIC2285YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2285YML-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 MIC2285YML-TR?
For technical support, including MIC2285YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2285YML-TR requirements.
6.How does Aetrix verify that MIC2285YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2285YML-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 MIC2285YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2285YML-TR?
All MIC2285YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2285YML-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 MIC2285YML-TR part is unused and in its original packaging.
Return procedure for MIC2285YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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