搜索结果：TPS77401

TPS77401是一款具有电源正常（PG）功能的低压差线性稳压器（LDO）。该器件可提供250mA输出电流，压差仅为200mV。满载时静态电流为92μA，在禁用状态下可降至1μA。其专为宽范围输出电容的稳定性而优化，包括低ESR陶瓷电容（10μF）或小容量（1μF）钽电容。无需外接滤波电容即可实现极低噪声输出性能（55μVrms）。TPS77401针对大负载电流变化设计了快速瞬态响应，提供1.5V、1.8V、2.7V、2.8V、3.3V和5V固定电压版本及可调版本（编程范围1.5V至5.5V）。在输入电压、负载和温度变化范围内，输出电压精度为2%。该器件采用8引脚微型小外形封装（MSOP-DGK）。 由于PMOS器件表现为低阻值电阻，其压差电压极低（3.3V版本在250mA输出电流时典型值为200mV），且与输出电流成正比。此外，PMOS传输元件为电压驱动型器件，静态电流极低且与输出负载无关（0mA至250mA全范围输出电流下典型值为92μA）。这两项关键特性显著提升了电池供电系统的工作寿命。 当使能（EN）引脚接入低电平电压时器件启动。该系列LDO还具有休眠模式：向EN引脚施加TTL高电平信号可关闭稳压器，在结温25°C时静态电流降至1μA以下。TPS77401的电源正常（PG）端口为高电平有效输出，可用于实现上电复位或低电量指示。器件内部比较器通过监测稳压器输出电压来检测欠压状态：当OUT降至稳压值的82%以下时，PG进入低阻抗状态；当OUT高于稳压值的82%时，PG恢复高阻抗状态。

IC REG LIN POS ADJ 250MA 8VSSOP

The TPS77401 is a low-dropout (LDO) regulator with power good (PG) function. This device is capable of supplying 250 mA of output current with a dropout of 200 mV. Quiescent current is 92 µA at full load dropping down to 1 µA when device is disabled. This device is optimized to be stable with a wide range of output capacitors including low-ESR ceramic (10-µF) or low-capacitance (1 µF) tantalum capacitors. This device has extremely low noise output performance (55 µV rms ) without using any added filter capacitors. The TPS77401 is designed to have fast transient response for larger load current changes. The TPS77401 is offered in 1.5-V, 1.8-V, 2.7-V, 2.8-V, 3.3-V, and 5-V fixed-voltage versions and in an adjustable version (programmable over the range of 1.5 V to 5.5 V). Output voltage tolerance is 2% over line, load, and temperature ranges. The TPS77401 device is available in an 8-pin mini small-outline package (MSOP) (DGK). Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 200 mV at an output current of 250 mA for 3.3-V option) and is directly proportional to the output current. Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 92 µA over the full range of output current, 0 mA to 250 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. The device is enabled when the enable ( EN ) pin is connected to a low-level input voltage. This LDO family also features a sleep mode; applying a TTL high signal to EN shuts down the regulator, reducing the quiescent current to less than 1 µA at T J = 25°C. For the TPS77401, the power good (PG) terminal is an active-high output, which can be used to implement a power-on reset or a low-battery indicator. An internal comparator in the TPS77401 monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT falls below 82% of its regulated voltage, PG goes to a low-impedance state. PG goes to a high-impedance state when OUT is above 82% of its regulated voltage.

IC REG LIN POS ADJ 250MA 8VSSOP

IC REG LIN POS ADJ 250MA 8VSSOP

IC REG LIN POS ADJ 250MA 8VSSOP