TPS77101QDGKRQ1

具有电源正常指示和使能功能的汽车类 150mA、10V、可调节低压降稳压器 8-VSSOP -40 to 125

The TPS771xx and TPS772xx are low-dropout regulators with integrated power-on reset and power good PG function respectively. These devices are capable of supplying 150 mA of output current with a dropout of 115 mV TPS77133, TPS77233. Quiescent current is 92 µA at full load dropping down to 1 µA when device is disabled. These devices are optimized to be stable with a wide range of output capacitors including low ESR ceramic 10 µF or low capacitance 1 µF tantalum capacitors. These devices have extremely low noise output performance 55 \xECVrms without using any added filter capacitors. TPS771xx and TPS772xx are designed to have fast transient response for larger load current changes.

The TPS771xx or TPS772xx 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 TPS771xx and TPS772xx families are available in 8-pin MSOP DGK packages.

Because the PMOS device behaves as a low-value resistor, the dropout voltage is low typically 115 mV at an output current of 150 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 low and independent of output loading typically 92 \xECA over the full range of output current, 0 mA to 150 mA. These two key specifications yield a significant improvement in operating life for battery-powered systems.

The device is enabled when the 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 enable shuts down the regulator, reducing the quiescent current to less than 1 µA at TJ = 25°C.

The TPS771xx features an integrated power-on reset, commonly used as a supply voltage supervisor SVS or reset output voltage. The RESET output of the TPS771xx initiates a reset in DSP, microcomputer or microprocessor systems at power up and in the event of an undervoltage condition. An internal comparator in the TPS771xx monitors the output voltage of the regulator to detect an undervoltage condition on the regulated output voltage. When OUT reaches 95% of its regulated voltage, RESET goes to a high-impedance state after a 220 ms delay. RESET goes to low-impedance state when OUT is pulled below 95% i.e., over load condition of its regulated voltage.

For the TPS772xx, the power good terminal PG 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 TPS772xx 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.