TPS7B4255
- Wide input operating voltage
range (3 V to 40 V):
- Absolute maximum input range: –40 V to +45 V
- Wide output voltage range: 2 V to 30 V
- Very-tight, output-tracking tolerance: 5 mV (max)
- Low dropout voltage: 500 mV (max) at 70 mA
- Reverse polarity protection
- Reverse current protection
- Combined reference and enable input
- Low quiescent current at light
loads (100-µA load):
- 50 µA (max)
- Wide ESR range:
- Stable with 1-µF to 200-µF ceramic output capacitor, 1-mΩ to 3-Ω ESR
- Overtemperature protection
- Output short-circuit protection to ground and supply
- Junction temperature: –40°C to +150°C, TJ
- Available in 5-pin SOT-23 DBV package
- Buffers signals up to 1 kHz (see the Signal-Buffering LDO section)
The TPS7B4255 is a low-dropout (LDO) voltage-tracking regulator, with high tracking accuracy and excellent load and line transient response. The device is available in a 5-pin, SOT-23 (DBV) package. The TPS7B4255 is designed to supply off-board sensors in industrial applications such as condition monitoring sensor systems. The device provides integrated protection features such as reverse polarity, output short to supply and ground, current limit, and thermal shutdown to protect against the high risk of cable failures in an off-board power system. The device is designed to survive a 45-V (absolute maximum) input voltage during extreme transient events.
A reference voltage applied at the ADJ/EN pin is effectively tracked with high accuracy for loads up to 70 mA. The high tracking accuracy provides accurate power supply to off-board modules and enables better accuracy when making measurements using ratiometric sensors.
By setting the ADJ/EN input pin low, the TPS7B4255 switches to standby mode and reduces the quiescent current to the minimum value.
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 | TPS7B4255 70-mA, 40-V, Voltage-Tracking LDO With Voltage-Buffering Capability datasheet | PDF | HTML | 2022/12/14 |
設計與開發
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TPS7B4255EVM-062 — 適用 70-mA、40-V 電壓追蹤低壓降 (LDO) 穩壓器的 TPS7B4255 評估模組
TPS7B4255EVM-062 評估模組 (EVM) 可用來評估 TPS7B4255-Q1 線性穩壓器的運作及性能，以在電路應用中使用。
此特定 EVM 配置包含適合汽車應用的 70-mA、高電壓、電壓追蹤、低壓降 (LDO) 穩壓器，以及適合超低寄生測量的板載負載暫態電路。該穩壓器可提供最高 70-mA 和 3-mV 追蹤公差，並具備高達 40 V 及 45 V 暫態的廣泛輸入電壓 (V IN) 範圍。為確保 TPS7B4255-Q1 的穩定性，請使用具小於 3-Ω 同等串聯電阻 (ESR) 的 1-µF (或更大) 輸出電容器。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |