LM3673
- 16-µA Typical Quiescent Current
- 350-mA Maximum Load Capability
- 2-MHz PWM Fixed Switching Frequency (Typical)
- Automatic PFM/PWM Mode Switching
- Available in Fixed and Adjustable Output Voltages
- Internal Synchronous Rectification for High Efficiency
- Internal Soft Start
- 0.01-µA Typical Shutdown Current
- Operates From a Single Li-Ion Cell Battery
- Current Overload and Thermal Shutdown Protection
- Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)
The LM3673 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 350-mA load current over the entire input voltage range. There are several different fixed voltage output options available, as well as an adjustable output voltage version ranging from 1.1 V to 3.3 V.
The device offers superior features and performance for mobile phones and similar portable systems. The LM3673 uses intelligent automatic switching between pulse width modulation (PWM) and pulse frequency modulation (PFM) for better efficiency. During PWM mode, the device operates at a fixed-frequency of
2 MHz (typical). Hysteretic PFM mode extends the battery life by reducing the quiescent current to 16 µA (typical) during light load and standby operation. Internal synchronous rectification provides high efficiency during PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).
The LM3673 is available in a tiny 5-pin DSBGA package. A high switching frequency of 2 MHz (typical) allows the use of three tiny surface-mount components: an inductor and two ceramic capacitors.
For all available packages, see the orderable addendum at the end of the data sheet.技術資料
種類 | タイトル | 最新の英語版をダウンロード | 日付 | |||
---|---|---|---|---|---|---|
* | データシート | LM3673 2-MHz, 350-mA Step-Down DC-DC Converter データシート (Rev. M) | PDF | HTML | 2016年 11月 15日 | ||
ユーザー・ガイド | AN-1465 LM3673 Evaluation Board (Rev. D) | 2013年 7月 5日 |
設計および開発
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パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
---|---|---|
DSBGA (YZR) | 5 | Ultra Librarian |
購入と品質
- RoHS
- REACH
- デバイスのマーキング
- リード端子の仕上げ / ボールの原材料
- MSL 定格 / ピーク リフロー
- MTBF/FIT 推定値
- 使用原材料
- 認定試験結果
- 継続的な信頼性モニタ試験結果
- ファブの拠点
- 組み立てを実施した拠点