MIC2250YML-TR - 2A Low-EMI Boost Regulator | Microchip
部品番号: MIC2250YML-TR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.42 | $1.42 |
| 10 | $1.18 | $11.80 |
| 100 | $0.94 | $94.00 |
| 500 | $0.78 | $390.00 |
| 1,000 | $0.65 | $650.00 |
MIC2250YML-TR 概要
A boost (step-up) DC/DC converter is a switching power supply topology that produces an output voltage higher than its input voltage. It is a member of the switching regulator family, itself a sub-category of power management ICs that convert one DC voltage level to another using energy storage (inductors and capacitors) and switching elements (MOSFETs). Boost regulators are widely used to derive system rails (e.g., 5V, 15V, or LED forward voltages) from a lower battery or bus voltage (e.g., Li-ion 3.7V, USB 5V, or 12V intermediate bus).
Key features of the MIC2250YML-TR include a 2A internal switch rating, low EMI via dithered switching frequency to spread spectral energy, 1.2A continuous output current capability, high light-load efficiency, and a wide input voltage range suitable for single-cell Li-ion applications. The 8-MLF exposed pad provides a low thermal resistance path, enabling compact PCB layouts without external heatsinking.
Architecturally, the MIC2250 uses a current-mode control loop with internal MOSFET and an external inductor/capacitor output filter. The dithering feature modulates the oscillator frequency to soften EMI peaks, simplifying EMC compliance for hand-held consumer and industrial products.
Typical applications include OLED/LCD bias supplies, white-LED camera flash drivers, USB-powered boost rails, audio accessory power, and industrial sensor excitation. The 2A switch makes it well suited to loads up to 500 mA continuous from a single Li-ion cell.
When designing with this device, choose an inductor with low DCR and a saturation rating of at least 3A to prevent saturation at peak switch current. Place the input/output ceramic capacitors as close as possible to the IC and use a ground plane under the exposed pad for thermal dissipation.
ドロップイン代替品: MIC2250YML-TR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
MIC2251YML-TR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MIC2250YML
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MIC2250YD-TR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
NCP3064MNTXG
✅ ドロップイン📋 参考代替品（カタログ未掲載）
NCP3063MNTXG
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MIC2250YML-TR 最大定格＆電気的特性
| トポロジー | Boost (Step-Up) DC/DC Switching Regulator |
| 出力構成 | Positive Adjustable |
| Minimum Output Voltage | 1.24 V |
| Internal Switch Current | 2 A |
| Continuous Output Current | 1.2 A (high light-load efficiency) |
| EMI Reduction | Yes - dithered oscillator |
| 動作温度範囲 | -40C to +125C |
| パッケージ | 8-MLF / 8-VFDFN Exposed Pad (2 mm x 2 mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Packaging | Tape & Reel (TR) |
MIC2250YML-TR ピン構成
| ピン 1 | SW — Switch node - connect to inductor |
| ピン 2 | VIN — Input supply voltage |
| ピン 3 | EN — Enable (active-high input) |
| ピン 4 | FB — Feedback (1.24V reference) |
| ピン 5 | COMP — Compensation network node |
| ピン 6 | GND — Ground |
| ピン 7 | NC — Not connected (per datasheet) |
| ピン 8 | NC — Not connected (per datasheet) |
| ピン EP | Exposed Pad — Thermal pad - connect to GND |
主な用途
MIC2250YML-TR の用途: 6 件s: OLED Display Bias Supply, White-LED Camera Flash Driver, USB-Powered Boost Rail (5V to 12V), Industrial Sensor Excitation Supply, Audio Accessory Power Boost, Handheld Battery-Powered Medical Device.
OLED Display Bias Supply
The MIC2250YML-TR is well-suited to drive OLED panel VCC rails (typically 7V-12V) from a single-cell Li-ion battery. Its 2A internal switch and 1.24V reference enable efficient step-up conversion with minimal external component count. The integrated dithering reduces EMI peaks by spreading switching energy across a wider spectrum, helping the design meet CISPR 22/EN 55022 Class B limits without complex filtering. Designers should use a 4.7uH to 10uH inductor with >=3A saturation rating and place input/output ceramic capacitors within 2 mm of the IC pins to minimize parasitic loop inductance.
おすすめ
White-LED Camera Flash Driver
The MIC2250YML-TR can drive high-brightness white LEDs from a Li-ion cell for camera flash applications requiring forward voltages of 3.2V-4.5V. The 2A switch capability supports flash currents up to 1A with proper inductor selection, and the 1.24V reference enables precise current regulation via an external sense resistor. Light-load efficiency at low LED standby bias (10-50 mA) is critical for camera always-on operation, and the MIC2250's pulse-frequency-modulation mode at light loads preserves battery life.
おすすめ
USB-Powered Boost Rail (5V to 12V)
For USB-powered systems requiring 12V rails (e.g., op-amp supplies, RS-232 transceivers, or sensor excitation), the MIC2250YML-TR efficiently boosts the USB 5V input to a regulated 12V output at hundreds of mA. The 2A switch comfortably handles 200-300 mA continuous loads at 12VOUT from a 5V input. The dithering feature mitigates conducted EMI on the USB VBUS line, simplifying USB compliance testing and avoiding common-mode choke additions.
おすすめ
Industrial Sensor Excitation Supply
Industrial sensors (strain gauges, pressure transducers, optical encoders) need clean, regulated excitation voltages above the 3.3V or 5V logic rail. The MIC2250YML-TR delivers stable 10V-24V rails from a 5V or 12V industrial bus for sensor excitation. Its 1.24V reference accuracy and low ripple support high-precision measurement systems where supply noise would otherwise couple into the sensor output. The wide -40C to +125C operating temperature suits factory-floor and outdoor deployments.
おすすめ
Audio Accessory Power Boost
Portable audio accessories (wireless headphones, Bluetooth speakers, hearing aids) frequently require boost rails to drive Class-D amplifier supplies, microphone bias, or active noise-cancellation circuits from a 3.7V Li-ion cell. The MIC2250YML-TR's dithered switching reduces audible whine that traditional fixed-frequency boost converters can introduce into sensitive audio signal chains. Its 2 mm x 2 mm footprint enables integration into compact earbud and wearable form factors.
おすすめ
Handheld Battery-Powered Medical Device
Portable medical devices (glucose meters, pulse oximeters, portable ECG patches) often need 5V or higher rails to power analog front ends, LCD bias networks, or wireless transceivers from a 3V coin cell or single Li-ion. The MIC2250YML-TR delivers efficient step-up conversion with low quiescent drain, extending battery life in bedside and wearable medical applications. The dithered oscillator reduces EMI that could couple into sensitive analog measurement channels, supporting IEC 60601-1-2 EMC compliance.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MIC2250YML-TR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MIC2251YML-TR | MIC2250YML | MIC2250YD-TR | NCP3064MNTXG | NCP3063MNTXG |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | onsemi | onsemi |
| Package | 8-MLF / 8-VFDFN Exposed Pad (2x2 mm) | 8-MLF / 8-VFDFN Exposed Pad (2x2 mm) - same | 8-MLF / 8-VFDFN Exposed Pad (2x2 mm) - same | 8-MLF / 8-VFDFN Exposed Pad (2x2 mm) - same | 8-MLF / 8-VFDFN Exposed Pad (2x2 mm) - same | 8-MLF / 8-VFDFN Exposed Pad (2x2 mm) - same |
| Topology | Boost (Step-Up) | Boost (Step-Up) | Boost (Step-Up) | Boost (Step-Up) | Boost / Buck / Inverting | Boost / Buck / Inverting |
| Internal Switch Current | 2 A | 3 A (+50%) | 2 A | 2 A | 2 A | 1.5 A (-25%) |
| Minimum Output Voltage | 1.24 V | 1.24 V | 1.24 V | 1.24 V | 1.25 V | 1.25 V |
| EMI Dithering | Yes | Yes | Yes | Yes | Yes | Yes |
| Packaging | Tape & Reel (TR) | Tape & Reel (TR) | Tray / Small Reel | Tape & Reel (TR) | Tape & Reel (TR) | Tape & Reel (TR) |
主な差別化要因
- Integrated dithering for low-EMI compliance （vs Generic 2A boost regulators without dithering)
- Compact 2x2 mm footprint with full 2A capability （vs Larger SOIC-8 or Micro-8 boost regulators)
- Pin-to-pin second-source via onsemi NCP3064MNTXG （vs Single-source Microchip-only designs)
設計ノート
The 8-MLF exposed pad is the primary thermal path. Solder it to a ground-plane copper pour of at least 50 mm^2 on the top and bottom layers with multiple thermal vias (>=5 vias, 0.3 mm drill) to keep junction temperature below 125C. At full 2A switch current, expect up to 1W internal dissipation at typical conversion ratios; copper pour area is more effective than external heatsinks in this 2x2 mm package.
Place the input ceramic capacitor (>=4.7uF X7R) within 2 mm of the VIN pin and the output capacitor (>=10uF X7R) within 2 mm of the switch-node return. Keep the SW trace short and wide to minimize radiated EMI. Route the feedback trace away from the switch node and inductor to avoid noise coupling; a 10 nF feedforward capacitor across the upper feedback resistor often improves transient response.
Do not exceed the inductor saturation current rating at peak switch current; an undersized inductor saturates and causes catastrophic current runaway. Verify that the input voltage remains above the undervoltage lockout threshold during load steps. The dithering feature reduces peak EMI but does not eliminate switching ripple - if the downstream load requires <20 mV ripple, add an LC post-filter or use an LDO downstream.
Use a single solid ground plane on the inner layer to provide a low-impedance return for the high-di/dt switch loop. Keep the small-signal ground (compensation network, feedback divider) star-connected to the IC GND pin rather than to the power ground plane, preventing ground bounce from coupling into the feedback loop and causing output ripple.
コンプライアンス情報
RoHS compliant per Microchip product page and distributor listings. Standard industrial-grade - not AEC-Q100 qualified; for automotive applications consult Microchip for AEC-Q100 alternatives.
