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Microchip Technology MIC2203YML-TR
- Part No.:
- MIC2203YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2203YML-TR.pdf
- Description:
- IC REG BUCK ADJ 300MA 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,321
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Product details
Overview
MIC2203YML-TR from Micrel is a high-efficiency, 1MHz synchronous buck regulator in a 3mm × 3mm MLF-10L package, designed for low-noise RF and audio power rails. It operates from 2.3V to 5.5V input, delivers up to 300mA output current, regulates down to 0.5V via external resistor divider, and features <1mA switching supply current and >95% peak efficiency - ideal for space-constrained portable devices like WLAN modules and MP3 players.
For engineers reviewing the MIC2203YML-TR datasheet, MIC2203YML-TR pinout, MIC2203YML-TR application, or MIC2203YML-TR equivalent, key selection considerations include its adjustable output voltage capability, SYNC_IN/SYNC_OUT daisy-chain synchronization, ultra-fast transient response enabled by high loop bandwidth, and compatibility with all-ceramic capacitor designs requiring no external compensation.
Technical Context
The MIC2203YML-TR implements voltage-mode PWM control with an internal 1MHz ramp generator and error amplifier referenced to a precise 0.5V feedback threshold. Its high loop bandwidth enables sub-microsecond transient response, reducing required output capacitance to just 2.2µF ceramic (X5R/X7R).
It integrates complementary P-channel high-side and N-channel low-side MOSFETs with typical 1.5Ω ON-resistance, supports external clock synchronization from 0.8MHz to 1.25MHz, and includes thermal shutdown, current limiting, and <1µA shutdown quiescent current - all within a –40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, Li-poly, or dual-cell alkaline/battery-powered systems without pre-regulation. |
| Output Current | 300mA continuous - sufficient for powering baseband processors, RF transceivers, or audio codecs in handheld devices. |
| Switching Frequency | 1MHz (±20%) - enables compact 10µH inductor and small ceramic capacitors while avoiding AM/FM radio bands. |
| Feedback Reference | 0.5V ±2.5% - sets output voltage via resistor divider (e.g., 3.83kΩ/10kΩ for 1.8V), minimizing divider current and noise sensitivity. |
| Quiescent Current | <1mA during switching - maintains high light-load efficiency critical for battery runtime in always-on subsystems. |
| Shutdown Current | <1µA - ensures negligible battery drain when disabled, supporting long-term standby modes. |
| Thermal Resistance θJA | 60°C/W (MLF-10L) - allows 300mA operation at +85°C ambient without forced airflow or heatsinking. |
Pinout & Package
Package: 3mm × 3mm, 10-pin MicroLead Frame (MLF™-10L) with exposed thermal pad (EP) connected to GND - optimized for thermal performance in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SW) | Switch Node | Internal MOSFET output node - connects to inductor; requires low-inductance layout and Kelvin return path for stability. |
| 2 (VIN) | Input Supply | Main power input (2.3–5.5V); requires ≥1µF X5R/X7R ceramic bypass capacitor placed adjacent to pin. |
| 3 (SYNC_IN) | External Clock Input | Accepts 0.8–1.25MHz TTL-compatible sync signal; tie to GND if unused to prevent noise coupling. |
| 4 (SYNC_OUT) | Synchronization Output | Open-collector 50ns pulse at oscillator frequency - enables master-slave daisy-chaining of multiple MIC2203YML-TR units. |
| 5 (EN) | Enable Control | Active-high logic input (0.7V threshold); pulls device into <1µA shutdown state when low, tri-stating SW output. |
| 6 (FB) | Feedback Input | Connects to resistor divider midpoint; internal 0.5V reference enables precise adjustable output voltage configuration. |
| 7 (BIAS) | Internal Bias Supply | 2.3V regulated output for internal circuitry; requires mandatory 10nF ceramic bypass capacitor to GND. |
| 8,9,10 (GND) | Signal Ground | Primary ground return paths - must be tied to common system ground plane; EP pad is electrically identical. |
| EP | Exposed Thermal Pad | Internally connected to GND - must be soldered to large copper pour for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| All-ceramic capacitor support | Stable operation with 1µF input / 2.2µF output X5R/X7R ceramics - eliminates electrolytic or tantalum parts, improving reliability and size. |
| Daisy-chain synchronization | SYNC_OUT → SYNC_IN cascading enables phase-aligned switching across multiple MIC2203YML-TR regulators - reduces input ripple and EMI summation. |
| Ultra-fast transient response | High loop bandwidth delivers sub-1µs recovery from 50% load steps - essential for CPU core or RF PA supply regulation. |
| Low-noise constant-frequency PWM | Fixed 1MHz operation avoids variable-frequency artifacts (e.g., burst mode), preventing interference in sensitive 2.4GHz WLAN or audio circuits. |
| Integrated protection | Thermal shutdown and cycle-by-cycle current limit prevent damage during overload or short-circuit conditions without external components. |
Applications
| 802.11 WLAN Modules | MP3/MD Players |
|---|---|
Use Scenario: Powering 2.4GHz RF transceiver ICs and baseband processors in compact wireless modules. IC Role / Device Role / Timing Role: Primary DC-DC converter supplying clean, low-noise 1.8V or 2.5V rails to RF and digital sections. Use Value: 1MHz fixed-frequency operation avoids spectral overlap with WLAN channels; SYNC_IN allows alignment with system clock to suppress beat frequencies. |
Use Scenario: Regulating battery-derived voltage to stable 1.2V–3.3V supplies for audio DACs, flash memory, and display drivers. IC Role / Device Role / Timing Role: High-efficiency buck regulator delivering 300mA with minimal heat in thermally constrained portable enclosures. Use Value: <1mA quiescent current extends playback time; all-ceramic design eliminates audible capacitor squeal during dynamic audio loads. |
| Handheld PDAs | Low-Power IoT Sensors |
Use Scenario: Supporting multi-rail power architecture (e.g., 1.2V core, 1.8V I/O, 3.3V interface) in legacy PDA platforms. IC Role / Device Role / Timing Role: Adjustable-output synchronous buck providing flexible, board-level point-of-load conversion. Use Value: EN pin enables software-controlled rail sequencing; wide input range accommodates aging Li-ion batteries down to 2.3V. |
Use Scenario: Powering ultra-low-power microcontrollers and BLE/Wi-Fi SoCs in battery-operated sensor nodes. IC Role / Device Role / Timing Role: Efficient step-down regulator operating across full battery discharge curve (3.6V → 2.3V) while maintaining regulated output. Use Value: <1µA shutdown current enables years of shelf life; MLF-10L package fits 3×3mm footprint constraints in miniaturized PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz switching frequency, 400mA output, 0.6V reference, smaller 2mm × 2mm WSON-6 package. | Better suited for higher-frequency, lower-current applications where board area is more constrained than thermal budget. | Select TPS62231DRVR when 3MHz operation enables smaller magnetics and faster transient response is prioritized over absolute lowest EMI. |
| RT8059ZSP | 1.5MHz switching, 500mA output, 0.6V reference, MSOP-8 package, no SYNC_IN/SYNC_OUT capability. | Lacks synchronization features and has higher quiescent current (~25µA in shutdown), limiting suitability for multi-rail synchronized systems. | Choose RT8059ZSP only when higher output current is required and daisy-chain timing alignment is unnecessary. |
Compared with TPS62231DRVR and RT8059ZSP, the MIC2203YML-TR offers unique 1MHz synchronization capability, <1µA shutdown current, and proven stability with minimal external components - making it optimal for noise-sensitive, multi-regulator RF/audio systems where timing coherence and battery longevity are critical.
Availability
MIC2203YML-TR is available at Aetrix Electronics and suitable for 802.11 WLAN modules, MP3 players, and handheld PDAs requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for MIC2203YML-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 (acquired by Microchip in 2015) was a U.S.-based analog and power management IC designer focused on high-performance, low-noise power solutions for communications and portable electronics.
The MIC2203 product line was engineered specifically for RF and audio subsystems demanding clean, efficient, and synchronizable DC-DC conversion - emphasizing low EMI, fast transient response, and minimal external component count.
FAQ
What is the minimum input voltage supported by the MIC2203YML-TR?
The MIC2203YML-TR supports a minimum input voltage of 2.3V, enabling direct operation from partially discharged single-cell Li-ion or Li-poly batteries. This specification is guaranteed across the full –40°C to +125°C junction temperature range and allows uninterrupted function down to end-of-discharge battery voltages without brownout.
Can the MIC2203YML-TR be used with only ceramic capacitors?
Yes, the MIC2203YML-TR is explicitly designed for all-ceramic capacitor operation: a minimum 1µF X5R/X7R ceramic at VIN and a 2.2µF X5R ceramic at VOUT ensure stability without requiring electrolytic or tantalum types. The internal voltage-mode compensation eliminates need for external RC networks, simplifying layout and improving reliability.
How does the SYNC_IN pin affect the MIC2203YML-TR's switching frequency?
The SYNC_IN pin allows the MIC2203YML-TR's switching frequency to be externally locked between 0.8MHz and 1.25MHz - deviating from its nominal 1MHz free-running frequency. When driven with a clean TTL-level clock, the device synchronizes its internal oscillator to that source, enabling harmonic alignment across multiple converters and EMI spectrum shaping.
What is the purpose of the BIAS pin on the MIC2203YML-TR?
The BIAS pin on the MIC2203YML-TR provides a dedicated 2.3V internal bias supply for internal circuitry and must be bypassed with a mandatory 10nF ceramic capacitor to GND. It is not intended as a user-accessible power rail - drawing external current will degrade regulation accuracy and may cause instability in the MIC2203YML-TR's control loop.
Does the MIC2203YML-TR require external compensation components?
No, the MIC2203YML-TR is fully internally compensated for use with a 10µH inductor and 2.2µF ceramic output capacitor. Its voltage-mode architecture and fixed 1MHz ramp generator eliminate the need for external compensation networks, reducing BOM count and layout complexity while ensuring stability across temperature and load variations.
MIC2203YML-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):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 300mA
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2203YML-TR FAQ
1.How can I place an order for MIC2203YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2203YML-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 MIC2203YML-TR reliable?
The price and inventory of MIC2203YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2203YML-TR is usually 5 days.
3.What payment methods are accepted for MIC2203YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2203YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2203YML-TR?
MIC2203YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2203YML-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 MIC2203YML-TR?
For technical support, including MIC2203YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2203YML-TR requirements.
6.How does Aetrix verify that MIC2203YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2203YML-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 MIC2203YML-TR meets industry standards.
7.What is the process for return or replacement of MIC2203YML-TR?
All MIC2203YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2203YML-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 MIC2203YML-TR part is unused and in its original packaging.
Return procedure for MIC2203YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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