| FLYiNG 零件編號 | ICLM3940IMP33NOPBTI |
| FLYiNG 庫存現貨 | 電洽/Contact |
| 製造商 | TEXAS INSTRUMENTS |
| 製造商零件編號 | LM3940IMP-3.3/NOPB |
| 說明 | LM3940IMP-3.3/NOPB SOT-223-4 TI |
| 無鉛狀態 / RoHS 指令狀態 | RoHS |
| 穩壓器數 | 1 |
| 輸入電壓 | 7.5V |
| 輸出電壓 | 3.3V |
| 壓降 (最大值) | 0.2V @ 100mA |
| 輸出電流 | 1A |
| 工作溫度 | -40°C ~ 85°C |
| 安裝類型 | SMD表面黏著式 |
| 封裝／外殼 | SOT-223-4 |
| 標準包裝數量 | 1000/Reel |
文件:LM3940.png)
LM3940
1-A Low-Dropout Regulator for 5-V to 3.3-V Conversion
FEATURES
LM3940
1-A Low-Dropout Regulator for 5-V to 3.3-V Conversion
FEATURES
- Input Voltage Range: 4.5 V to 5.5 V
- Output Voltage Specified over Temperature
- Excellent Load Regulation
- Specified 1-A Output Current
- Requires only One External Component
- Built-in Protection against Excess Temperature
- Short-Circuit Protected
- Laptop and Desktop Computers
- Logic Systems
The LM3940 is a 1-A low-dropout regulator designed to provide 3.3 V from a 5-V supply.
The LM3940 is ideally suited for systems which contain both 5-V and 3.3-V logic, with prime power provided from a 5-V bus.
Because the LM3940 is a true low dropout regulator, it can hold its 3.3-V output in regulation with input voltages as low as 4.5 V.
The TO-220 package of the LM3940 means that in most applications the full 1 A of load current can be delivered without using an additional heatsink.
The surface mount DDPAK/TO-263 package uses minimum board space, and gives excellent power dissipation capability when soldered to a copper plane on the PC board.
The LM3940 is ideally suited for systems which contain both 5-V and 3.3-V logic, with prime power provided from a 5-V bus.
Because the LM3940 is a true low dropout regulator, it can hold its 3.3-V output in regulation with input voltages as low as 4.5 V.
The TO-220 package of the LM3940 means that in most applications the full 1 A of load current can be delivered without using an additional heatsink.
The surface mount DDPAK/TO-263 package uses minimum board space, and gives excellent power dissipation capability when soldered to a copper plane on the PC board.
LM3940
1A 低壓降穩壓器，適用於 5V 至 3.3V 轉換
特性
- 輸入電壓範圍：4.5V 至 5.5V
- 輸出電壓溫度範圍內規格化
- 優異的負載調節能力
- 額定輸出電流達 1A
- 僅需一顆外部元件
- 內建過溫保護機制
- 短路保護
應用領域
- 筆記型電腦與桌上型電腦
- 邏輯系統
產品描述
LM3940 為一款1A 低壓降 (LDO) 穩壓器，專為 5V 轉 3.3V 供電應用而設計。
該穩壓器特別適用於同時包含 5V 與 3.3V 邏輯電路的系統，並且由 5V 匯流排提供主要電源。
由於 LM3940 屬於真正的低壓降穩壓器，因此即使輸入電壓降至 4.5V，仍可維持穩定的 3.3V 輸出電壓。
TO-220 封裝在大多數應用中可提供 1A 負載電流，而無需額外的散熱片。
而 DDPAK/TO-263 表面貼裝封裝則可有效節省 PCB 板面積，並透過焊接至銅層提供優異的散熱能力。
