LP2985A
- VIN range (new chip): 2.5V to 16V
- VOUT range (new
chip):
- 1.2V to 5.0V (fixed, 100mV steps)
- VOUT accuracy:
- ±1% for A-grade (legacy chip)
- ±1.5% for standard-grade (legacy chip)
- ±0.5% (new chip)
- ±1% output accuracy over load and temperature (new chip)
- Output current: Up to 150mA
- Low IQ (new chip): 71µA at ILOAD = 0mA
- Low IQ (new chip): 750µA at ILOAD = 150mA
- Shutdown current:
- 0.01µA (typ, legacy chip)
- 1.12µA (typ, new chip)
- Low noise: 30µVRMS with 10nF bypass capacitor
- Output current limiting and thermal protection
- Stable with 2.2µF ceramic capacitors (new chip)
- High PSRR: 70dB at 1kHz, 40dB at 1MHz (new chip)
- Operating junction temperature: –40°C to +125°C
- Package: 5-pin SOT-23 (DBV)
The LP2985 is a fixed-output, wide-input, low-noise, low-dropout voltage regulator supporting an input voltage range from 2.5V to 16V (for new chip) and up to 150mA of load current. The LP2985 supports an output range of 1.2V to 5.0V (for new chip).
Additionally, the LP2985 (new chip) has a ±1% output accuracy across load, and temperature that can meet the needs of low-voltage microcontrollers (MCUs) and processors.
Low output noise of 30µVRMS (with 10nF bypass capacitors) and wide bandwidth PSRR performance of greater than 70dB at 1kHz and 40dB at 1MHz help attenuate the switching frequency of an upstream DC/DC converter and minimize post regulator filtering.
The new chip provides internal soft-start mechanism to reduce inrush current during start up, thus minimizing input capacitance. Standard protection features, such as overcurrent and overtemperature protection, are also included.
The LP2985 is available in a 5-pin 2.9mm × 2.8mm SOT-23 (DBV) package.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LP2985 150mA, Low-Noise, Low-Dropout Regulator With Shutdown datasheet (Rev. S) | PDF | HTML | 2025/5/23 |
設計與開發
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PMP23332 — 交錯式和多相反相降壓-升壓轉換器參考設計
此參考設計運用 UCD3138064A 做為數位控制器，使用支援雙相峰值電流模式控制的能力來控制反相降壓升壓。此設計採用軟切換技術提升電源效率。輸入電壓範圍為 -62 V 至 -36 V。輸出電壓範圍可在 28 V 至 52 V 之間調整。預設輸出電壓為 48-V，最大電流為 14 A。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。