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Microchip Technology MIC2205-1.38YML-TR
- Part No.:
- MIC2205-1.38YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2205-1.38YML-TR.pdf
- Description:
- IC REG BUCK 1.38V 600MA 10MLF
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MIC2205-1.38YML-TR from Microchip Technology is a 2 MHz synchronous buck regulator with integrated LDO standby mode, delivering 1.38 V fixed output voltage at up to 600 mA in PWM mode and 60 mA in LDO mode, with 18 μA quiescent current and 75 μVRMS output noise - deployed in USB peripherals and portable battery-powered systems requiring ultra-low-noise, high-efficiency power conversion.
For engineers reviewing the MIC2205-1.38YML-TR datasheet, MIC2205-1.38YML-TR pinout, MIC2205-1.38YML-TR application, or MIC2205-1.38YML-TR equivalent, key selection criteria include its dual-mode operation (PWM/LDO), 100% duty cycle capability for low-dropout conditions, stability with 1 μF ceramic output capacitor, thermal shutdown protection, and VDFN-10L package compatibility with space-constrained PCB layouts.
Technical Context
The MIC2205-1.38YML-TR integrates fully synchronous MOSFETs and operates in constant-frequency 2 MHz PWM mode above 60 mA load, switching automatically to low-noise LDO mode below that threshold via the LOWQ control pin. Its internal 1.0 V reference and fixed 1.38 V output are achieved via factory-trimmed feedback network - no external resistors required.
This device uses type III internal compensation optimized for 2.2 μH inductors and 2.2 μF output capacitors, supports 100% duty cycle down to VIN – VOUT = 110 mV dropout (at 50 mA), and features separate AGND/PGND pins plus dedicated BIAS and AVIN rails to isolate analog control circuitry from switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.38 V ±2% over temperature - eliminates need for external feedback resistors and ensures stable core voltage for low-voltage logic. |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion, Li-polymer, and 3.3 V/5 V system rails. |
| Max Output Current | 600 mA in PWM mode; 60 mA in LDO mode - enables seamless transition between high-efficiency switching and ultra-low-noise linear regulation. |
| Quiescent Current | 18 μA in LDO mode - extends battery life during system sleep or standby without introducing switching ripple. |
| Switching Frequency | 2 MHz (1.8–2.2 MHz typical) - allows use of small 2.2 μH inductors and reduces EMI in frequency bands outside sensitive RF receivers. |
| Output Noise | 75 μVRMS (10 Hz–100 kHz) - meets stringent noise requirements for RF transceivers and precision analog circuits. |
| Duty Cycle | 100% maximum - supports operation with minimal input-to-output differential, critical for low-VIN battery discharge scenarios. |
| Junction Temp Range | –40°C to +125°C - qualified for industrial and automotive under-hood applications where ambient temperatures exceed 85°C. |
Pinout & Package
Package: 10-Lead VDFN (ML), 3 mm × 3 mm × 0.9 mm body, exposed thermal pad (EP), RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AGND) | Analog Ground | Reference return for FB, BIAS, AVIN, and internal error amplifier - must be routed separately from PGND to avoid noise coupling. |
| 2 (LDO) | LDO Output | Connects directly to VOUT; provides regulated 1.38 V in LOWQ = low mode; high-impedance in PWM mode. |
| 3 (BIAS) | Bias Supply Input | Powers internal reference and control circuitry via internal 6 Ω resistor from AVIN - requires 0.1 μF local bypass to AGND. |
| 4 (AVIN) | Analog Supply Input | Provides clean power to LDO section and bias chain - must tie to VIN but with careful layout to filter switching noise. |
| 5 (FB) | Feedback Input | Internal resistor divider sets fixed 1.38 V output - no external components 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 enables LDO mode (18 μA IQ); logic-high enables PWM mode (600 mA) - controls dynamic efficiency/noise trade-off. |
| 8 (VIN) | Main Power Input | Supplies high-current MOSFET switches - requires 1 μF ceramic bypass capacitor placed close to VIN and PGND. |
| 9 (SW) | Switch Node Output | Drives external inductor in PWM mode - high dV/dt node; must be minimized in area and kept away from sensitive analog traces. |
| 10 (PGND) | Power Ground | High-current return path for MOSFETs and inductor - forms tight loop with VIN and SW to minimize EMI and ground bounce. |
| EP (GND) | Exposed Thermal Pad | Primary thermal path to PCB - must be soldered to solid copper pour with thermal vias for reliable 125°C operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Fast Transient Response | Sub-10 μs recovery from 50 mA ↔ 500 mA load steps - maintains stable 1.38 V output for burst-mode processors and RF modems. |
| Stable with 1 μF Ceramic Output Capacitor | Enables compact designs using low-ESR X5R/X7R MLCCs - eliminates need for larger, higher-cost tantalum or polymer capacitors. |
| Integrated High-Side/Low-Side MOSFETs | Reduces BOM count and layout complexity - eliminates external gate drivers and discrete FETs while maintaining >95% peak efficiency. |
| Thermal Shutdown & Current Limit | 160°C overtemperature cutoff with 20°C hysteresis and 0.75–1.85 A current limit - protects against sustained overload and PCB overheating. |
| Micropower Shutdown | <5 μA shutdown current - enables zero-power state during long-term storage or firmware updates without battery drain. |
| PSRR >60 dB at 100 kHz (LDO mode) | Rejects high-frequency noise from upstream converters - preserves signal integrity in mixed-signal SoC power domains. |
Applications
| USB-C Peripheral Power | Low-Power IoT Sensor Node |
|---|---|
Use Scenario: Powering USB-C audio adapters, HID devices, or bus-powered hubs with strict EMI and noise limits. IC Role / Device Role / Timing Role: Primary 1.38 V core supply for USB PHY and microcontroller - delivers clean, ripple-free voltage during data bursts. Use Value: 75 μVRMS noise and 2 MHz switching prevent interference with USB 2.0 high-speed signaling (480 Mbps) and ensure full compliance with USB-IF EMI test limits. | Use Scenario: Battery-operated environmental sensor nodes transmitting intermittently via BLE or LoRaWAN. IC Role / Device Role / Timing Role: Dual-mode regulator supplying MCU core and RF transceiver - switches to LDO mode during 99% sleep time to extend 10-year battery life. Use Value: 18 μA LDO quiescent current reduces average system current to <1 μA in deep sleep, enabling CR2032 coin cell operation for >5 years. |
| Portable Medical Monitor | Industrial Handheld Terminal |
Use Scenario: Powering ECG front-end amplifiers and ADCs in wearable patient monitors. IC Role / Device Role / Timing Role: Low-noise 1.38 V rail for precision analog signal chain - isolated from digital switching noise by separate AGND/PGND and AVIN filtering. Use Value: PSRR >60 dB at 100 kHz and 110 mV dropout at 50 mA enable stable operation even as battery discharges from 4.2 V to 2.7 V. | Use Scenario: Ruggedized handheld terminals used in warehouse logistics with wide ambient temperature swings. IC Role / Device Role / Timing Role: Main system regulator supporting ARM Cortex-M7 MCU and display driver - operates continuously across –40°C to +85°C ambient. Use Value: –40°C to +125°C junction rating and 60°C/W θJA allow full 600 mA output at 85°C ambient with standard 2-layer PCB cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | Fixed 1.35 V output; 3 MHz switching; 22 μA IQ in PFM mode; no LDO standby mode. | Lacks true low-noise LDO fallback - uses pulse-frequency modulation, generating higher low-frequency ripple unsuitable for RF/analog loads. | Select when board space is constrained and 3 MHz allows smaller inductors, but avoid where sub-100 μV noise is mandatory. |
| RT7290AZSP | Fixed 1.35 V output; 2 MHz; 25 μA IQ in skip mode; includes I2C programmability and power-good flag. | No integrated LDO path - relies on external LDO for quiet mode, increasing component count and footprint. | Choose when system-level monitoring (PGOOD, telemetry) is required and external LDO integration is acceptable. |
Compared with TPS62231DRYT and RT7290AZSP, the MIC2205-1.38YML-TR uniquely combines fixed 1.38 V output, true LDO standby with 18 μA IQ and 75 μVRMS noise, and 100% duty cycle - making it optimal for noise-sensitive, battery-critical applications where seamless mode transition and minimal BOM are essential.
Availability
MIC2205-1.38YML-TR is available at Aetrix Electronics and suitable for USB peripherals, portable medical monitors, low-power IoT sensor nodes, industrial handheld terminals, and battery-powered communication modules requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for MIC2205-1.38YML-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 design centers worldwide and ISO/TS-16949-certified manufacturing.
The MIC2205 product line delivers high-efficiency, low-noise DC-DC conversion for portable and battery-powered systems - engineered specifically for applications demanding dynamic efficiency optimization, ultra-low quiescent current, and robust thermal performance in miniature packages.
FAQ
What is the output voltage tolerance of the MIC2205-1.38YML-TR over temperature?
The MIC2205-1.38YML-TR has a fixed 1.38 V output with ±2% tolerance over the full –40°C to +125°C junction temperature range, as specified in the Electrical Characteristics table (DS20006177A, page 3). This tolerance is achieved through factory trimming of the internal feedback divider and remains stable without external components.
Can the MIC2205-1.38YML-TR operate with a 2.5 V input voltage?
Yes, the MIC2205-1.38YML-TR supports input voltages from 2.7 V to 5.5 V per its Absolute Maximum and Operating Ratings. At 2.5 V input, the device will not operate - UVLO turns off regulation below 2.45 V (typical) turn-on threshold. For 2.5 V input applications, consider a lower-VOUT variant or pre-regulation.
How does the LOWQ pin control mode switching in the MIC2205-1.38YML-TR?
The LOWQ pin selects operating mode: logic low (<0.5 V) enables LDO mode (18 μA IQ, 60 mA output); logic high (>1.5 V) enables PWM mode (600 mA, 2 MHz). The MIC2205-1.38YML-TR transitions seamlessly between modes with no output voltage glitch - verified in Figure 2-34 and 2-35 of the datasheet.
Is an external feed-forward capacitor required for the MIC2205-1.38YML-TR?
Yes - a 100 pF ceramic capacitor is required between the FB pin and VOUT for the MIC2205-1.38YML-TR, as stated in Section 4.7 and confirmed in the Typical Application schematic (DS20006177A, page 2). This capacitor stabilizes the control loop for the fixed-output configuration and is not optional.
What thermal management is recommended for the MIC2205-1.38YML-TR at full 600 mA load?
At 600 mA continuous load, the MIC2205-1.38YML-TR requires the exposed thermal pad (EP) to be soldered to a minimum 100 mm² copper pour with ≥4 thermal vias (0.33 mm diameter, 1.2 mm pitch) to an inner ground plane. With this layout, θJA remains near 60°C/W, keeping junction temperature within the +125°C limit at +85°C ambient.
MIC2205-1.38YML-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):
- 1.38V
- 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)
MIC2205-1.38YML-TR FAQ
1.How can I place an order for MIC2205-1.38YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2205-1.38YML-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 MIC2205-1.38YML-TR reliable?
The price and inventory of MIC2205-1.38YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2205-1.38YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2205-1.38YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2205-1.38YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2205-1.38YML-TR?
MIC2205-1.38YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2205-1.38YML-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 MIC2205-1.38YML-TR?
For technical support, including MIC2205-1.38YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2205-1.38YML-TR requirements.
6.How does Aetrix verify that MIC2205-1.38YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2205-1.38YML-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 MIC2205-1.38YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2205-1.38YML-TR?
All MIC2205-1.38YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2205-1.38YML-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 MIC2205-1.38YML-TR part is unused and in its original packaging.
Return procedure for MIC2205-1.38YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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