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Microchip Technology MIC2205-1.85YML-TR
- Part No.:
- MIC2205-1.85YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2205-1.85YML-TR.pdf
- Description:
- IC REG BUCK 1.85V 600MA 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:3,453
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Product details
Overview
MIC2205-1.85YML-TR from Microchip Technology is a 2 MHz synchronous buck regulator with integrated LDO standby mode, delivering up to 600 mA in PWM mode and 60 mA in LDO mode. It operates from 2.7V–5.5V input, provides fixed 1.85V output, achieves >95% efficiency at full load, and maintains ultra-low 75 μVRMS noise in LDO mode - ideal for noise-sensitive RF and audio power rails in portable electronics.
For engineers reviewing the MIC2205-1.85YML-TR datasheet, MIC2205-1.85YML-TR pinout, MIC2205-1.85YML-TR application, or MIC2205-1.85YML-TR equivalent, key selection criteria include its dual-mode operation (PWM/LDO), 18 μA quiescent current in light-load LDO mode, 100% duty cycle capability for low-dropout operation, stability with only 1 μF ceramic output capacitor, and thermal shutdown protection across –40°C to +125°C junction range.
Technical Context
The MIC2205-1.85YML-TR integrates two independent regulation paths: a high-efficiency 2 MHz constant-frequency PWM buck converter with internal high-side/low-side MOSFETs, and a parallel low-noise linear regulator activated via LOWQ pin control. Its type III compensation architecture enables stable operation with small 1–4.7 μF output capacitors while rejecting switching ripple in LDO mode.
It features separate analog (AGND) and power (PGND) ground planes, dedicated AVIN bias supply decoupled by 0.1 μF, and BIAS pin powering internal reference circuitry. The FB pin is internally connected to a precision 1.0 V reference for the fixed 1.85 V output (R1/R2 = 85 kΩ/100 kΩ), eliminating external resistors but retaining feed-forward capacitor support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.85 V ±2% over temperature - eliminates external feedback resistors and simplifies layout for single-rail applications. |
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion, Li-polymer, and 3.3 V/5 V system rails without pre-regulation. |
| Max Output Current | 600 mA in PWM mode; 60 mA in LDO mode - enables seamless handoff between high-current and ultra-low-noise operation. |
| Quiescent Current | 18 μA in LDO mode; 690–900 μA in PWM mode - extends battery life during sleep/standby without introducing PFM ripple. |
| Switching Frequency | 1.8–2.2 MHz (typ. 2 MHz) - allows use of compact 2.2 μH inductors and reduces EMI filtering requirements. |
| Output Noise | 75 μVRMS (10 Hz–100 kHz) in LDO mode - meets stringent noise specs for ADC references, PLL supplies, and RF front-end biasing. |
| Duty Cycle Range | 0–100% - supports dropout operation down to VIN = VOUT + 110 mV at 50 mA, critical for deep battery discharge scenarios. |
| Junction Temp Range | –40°C to +125°C - qualified for automotive infotainment, industrial handhelds, and extended-temperature embedded systems. |
Pinout & Package
Package: 10-lead 3 mm × 3 mm × 0.9 mm Very Thin Plastic Dual Flat No-Lead (VDFN-10L, ML), RoHS-compliant, with exposed thermal pad (EP/GND) for enhanced thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 AGND | Analog Ground | Reference return for FB, BIAS, and internal error amplifier - must be routed separately from PGND to avoid noise coupling. |
| 2 LDO | LDO Output | Connects directly to VOUT; active only when LOWQ = low - provides clean 1.85 V output with 110 mV dropout at 50 mA. |
| 3 BIAS | Bias Supply Input | Internally powered from AVIN via 6 Ω resistor; requires 0.1 μF ceramic bypass to AGND for stable reference generation. |
| 4 AVIN | Analog Supply Input | Provides clean power to LDO and control circuitry; must tie to VIN with low-inductance path and local 1 μF bypass to PGND. |
| 5 FB | Feedback Input | Internally biased to 1.0 V reference; for fixed 1.85 V output, no external divider needed - feed-forward capacitor (100 pF) required between FB and VOUT. |
| 6 EN | Enable Input | Logic-high (>0.85 V) enables regulation; logic-low (<0.5 V) shuts down device to <5 μA - supports system-level power sequencing. |
| 7 LOWQ | Mode Select Input | Logic-low (<0.5 V) forces LDO-only operation; logic-high (>1.5 V) enables PWM mode - enables dynamic efficiency/noise trade-off control. |
| 8 VIN | Main Power Input | Supplies internal MOSFETs and drivers; requires 1 μF ceramic capacitor placed close to VIN and PGND for high-frequency noise suppression. |
| 9 SW | Power Switch Node | Connects to inductor; carries high di/dt PWM current - must be short, wide, and isolated from sensitive analog traces. |
| 10 PGND | Power Ground | High-current return path for PWM loop - requires low-impedance copper pour and separate routing from AGND to minimize ground bounce. |
| EP | Exposed Thermal Pad | Internally connected to GND; must be soldered to PCB thermal plane with ≥4 thermal vias for θJA = 60°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise LDO mode | 75 μVRMS output noise enables direct powering of RF synthesizers and high-resolution ADCs without additional filtering. |
| 100% duty cycle capability | Supports operation with VIN as low as VOUT + 110 mV, extending usable battery voltage range in single-cell Li-ion systems. |
| Stable with 1 μF ceramic output | Reduces BOM count and board area vs. typical buck regulators requiring ≥10 μF - compatible with X5R/X7R dielectrics. |
| Integrated MOSFET switches | Eliminates external high-side/low-side FETs and gate drivers - simplifies design, improves efficiency, and reduces footprint. |
| Thermal + current protection | 160°C overtemperature shutdown with 20°C hysteresis and 0.75–1.85 A current limit prevent damage during overload or poor heatsinking. |
| Micropower shutdown | <5 μA shutdown current enables long-term storage or system-level deep-sleep modes without battery drain. |
Applications
| Cellular Baseband Power | USB Peripheral Power |
|---|---|
Use Scenario: Powering LTE/5G baseband processors and memory interfaces in smartphones and mobile hotspots where burst-mode data transmission demands rapid load transient response. IC Role / Device Role / Timing Role: Primary 1.85 V core supply with dual-mode regulation - PWM delivers peak 600 mA during transmit bursts; LDO supplies quiet 1.85 V during idle/receive phases. Use Value: Eliminates need for separate LDO post-regulator, reducing component count while maintaining <1% output deviation during 100 mA/μs load steps. | Use Scenario: Providing regulated 1.85 V to USB-C PD controllers, Type-C port logic, and USB 3.x PHYs in docking stations and host controllers. IC Role / Device Role / Timing Role: System-level power manager that transitions between high-efficiency PWM (during enumeration/negotiation) and low-noise LDO (during high-speed data transfer). Use Value: Prevents switching noise from corrupting USB SS lane eye diagrams - measured PSRR >60 dB at 100 kHz in LDO mode ensures signal integrity compliance. |
| Portable Audio Codec Supply | Industrial Handheld Display Backlight Bias |
Use Scenario: Generating clean 1.85 V bias for stereo audio codecs, DACs, and headphone amplifiers in Bluetooth speakers and voice assistants. IC Role / Device Role / Timing Role: Low-noise analog rail generator - LDO mode active during playback; PWM mode engaged only during firmware updates or Bluetooth stack initialization. Use Value: Achieves THD+N <–105 dB by suppressing switching artifacts below audible band - verified with 75 μVRMS noise floor into 2.2 μF ceramic output cap. | Use Scenario: Powering LED driver IC bias rails and display interface logic in ruggedized industrial tablets used in warehouse scanning and field service. IC Role / Device Role / Timing Role: Robust system supply managing wide input (2.7–5.5 V) from primary battery or USB input, operating continuously across –40°C to +85°C ambient. Use Value: Maintains 1.85 V ±2% accuracy over full temperature range with no derating - validated by 125°C junction rating and 60°C/W thermal resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator with LDO standby applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | Fixed 1.8 V output; 2.05 MHz switching; 300 mA max output; no LDO mode - uses DCS-Control topology instead of dual-mode PWM/LDO. | Lacks ultra-low-noise standby capability; unsuitable for RF/audio where LDO-mode noise rejection is mandatory. | Select only if 1.8 V output suffices and system does not require sub-100 μVRMS noise in idle state. |
| RT7295BGJ6F | Adjustable 0.6–5.5 V output; 2 MHz; 600 mA; includes light-load pulse-skipping (not LDO) - higher light-load noise than MIC2205-1.85YML-TR. | Generates ~20 mVPP low-frequency ripple in PFM mode, incompatible with noise-critical analog circuits. | Choose only for cost-sensitive designs where 1.85 V fixed output and LDO-mode noise performance are not required. |
Compared with TPS62260DRVR and RT7295BGJ6F, the MIC2205-1.85YML-TR uniquely combines fixed 1.85 V output, integrated LDO standby with 75 μVRMS noise, and 600 mA PWM capability - making it the sole option among these three for applications demanding both high current and ultra-low-noise operation from a single IC.
Availability
MIC2205-1.85YML-TR is available at Aetrix Electronics and suitable for cellular baseband power, USB peripheral power, portable audio codec supply, and industrial handheld display backlight bias requiring stable component supply across automotive-grade temperature ranges and long product lifecycles.
Supply support for MIC2205-1.85YML-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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on reliability, longevity, and embedded system integration.
The MIC2205 product line delivers high-efficiency, dual-mode DC-DC conversion for portable and battery-powered applications - designed specifically to extend runtime while maintaining signal integrity in noise-sensitive subsystems.
FAQ
What is the output voltage tolerance of the MIC2205-1.85YML-TR over temperature?
The MIC2205-1.85YML-TR provides a fixed 1.85 V output with ±2% tolerance over the full –40°C to +125°C junction temperature range, as specified in the Electrical Characteristics table under "Fixed Output Voltages" with ±2% over temperature. This is achieved via an internal precision 1.0 V reference and trimmed feedback network, eliminating drift-related calibration in end equipment.
Does the MIC2205-1.85YML-TR require external feedback resistors for its 1.85 V output?
No, the MIC2205-1.85YML-TR does not require external feedback resistors. Its fixed 1.85 V output is implemented using an internal resistor divider referenced to a 1.0 V bandgap, so the FB pin connects directly to VOUT via a 100 pF feed-forward capacitor - simplifying layout and improving noise immunity compared to adjustable variants.
How does the LOWQ pin control mode transition in the MIC2205-1.85YML-TR?
The LOWQ pin on the MIC2205-1.85YML-TR acts as a digital mode selector: pulling LOWQ below 0.5 V enables LDO-only operation (18 μA IQ, 60 mA output); pulling it above 1.5 V enables PWM mode (600 mA output, >95% efficiency). The transition is seamless with no output voltage glitch, verified in Figure 2-34 and 2-35 of the datasheet.
Can the MIC2205-1.85YML-TR operate with a 1 μF output capacitor?
Yes, the MIC2205-1.85YML-TR is explicitly characterized and guaranteed stable with a minimum 1 μF ceramic output capacitor (X5R/X7R), per Section 5.2 and the "Stable with 1 μF Ceramic Output Capacitor" feature. Larger values up to 4.7 μF are supported, but Y5V dielectrics are discouraged due to capacitance loss over temperature.
What thermal performance can be expected from the MIC2205-1.85YML-TR in a standard 4-layer PCB layout?
In a standard 4-layer PCB with 1 oz copper, 200 mm² thermal pad area, and ≥4 thermal vias to an internal ground plane, the MIC2205-1.85YML-TR achieves θJA ≈ 60°C/W as specified - enabling continuous 600 mA output at ambient ≤65°C. Derating curves in Figure 2-13 confirm 100% duty cycle operation remains within 125°C junction limit under these conditions.
MIC2205-1.85YML-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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.85V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2205-1.85YML-TR FAQ
1.How can I place an order for MIC2205-1.85YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2205-1.85YML-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 MIC2205-1.85YML-TR reliable?
The price and inventory of MIC2205-1.85YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2205-1.85YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2205-1.85YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2205-1.85YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2205-1.85YML-TR?
MIC2205-1.85YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2205-1.85YML-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 MIC2205-1.85YML-TR?
For technical support, including MIC2205-1.85YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2205-1.85YML-TR requirements.
6.How does Aetrix verify that MIC2205-1.85YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2205-1.85YML-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 MIC2205-1.85YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2205-1.85YML-TR?
All MIC2205-1.85YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2205-1.85YML-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 MIC2205-1.85YML-TR part is unused and in its original packaging.
Return procedure for MIC2205-1.85YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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