LM2831
- Space-Saving SOT-23 Package
- Input Voltage Range of 3 V to 5.5 V
- Output Voltage Range of 0.6 V to 4.5 V
- 1.5-A Output Current
- High Switching Frequencie
- 1.6 MHz (LM2831X)
- 0.55 MHz (LM2831Y)
- 3 MHz (LM2831Z)
- 130-mΩ PMOS Switch
- 0.6-V, 2% Internal Voltage Reference
- Internal Soft Start
- Current Mode, PWM Operation
- Thermal Shutdown
- Overvoltage Protection
The LM2831 regulator is a monolithic, high-frequency, PWM step-down DC-DC converter in a 5-pin SOT-23 and a 6-Pin WSON package. The LM2831 provides all the active functions to provide local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM2831 is easy to use. The ability to drive 1.5-A loads with an internal 130-mΩ PMOS switch using state-of-the-art 0.5-µm BiCMOS technology results in the best power density available. The world-class control circuitry allows on-times as low as 30 ns, thus supporting exceptionally high frequency conversion over the entire 3 V to 5.5 V input operating range, down to the minimum output voltage of 0.6 V. Switching frequency is internally set to 550 kHz, 1.6 MHz, or 3 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies of up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 30 nA. The LM2831 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | LM2831 High-Frequency 1.5-A Load — Step-Down DC-DC Regulator datasheet (Rev. D) | PDF | HTML | 2015年 9月 30日 |
White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 2024年 4月 30日 | |
EVM User's guide | AN-1550 LM2831X 6-Pin LLP Demo Board (Rev. A) | 2013年 4月 25日 |
設計與開發
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PMP9487 — 適用汽車儀錶板資訊娛樂系統的 CISPR 25 第 5 類額定多重輸出電源
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
SOT-23 (DBV) | 5 | Ultra Librarian |
WSON (NGG) | 6 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點