TPS76433

*150-mA Low Noise, Low-Dropout Regulator
*Output Voltage: 2.5 V, 2.7 V, 2.8 V, 3.0 V, 3.3 V
*Output Noise Typically 50 µV
*Quiescent Current Typically 85 µA
*Dropout Voltage, Typically 300 mV at 150 mA
*Thermal Protection
*Over Current Limitation
*Less Than 2-µA Quiescent Current in
  Shutdown Mode
*40 to 125 Operating Junction
  Temperature Range
*5-Pin SOT-23 (DBV) Package

    The TPS76433 low-dropout (LDO) voltage regulators offers the benefits of a low noise, low-dropout voltage, low-power operation, and miniaturized package. Additionally, TPS76433 feature low quiescent current when compared to conventional LDO regulators. Offered in 5-terminal small outline integrated-circuit SOT-23 package, the TPS76433 series devices are ideal for low-noise applications, cost-sensitive designs and applications where board space is at a premium.

    A combination of new circuit design and process innovation has enabled the usual pnp pass transistor to be replaced by a PMOS pass element. Because the PMOS pass element of TPS76433 behaves as a low-value resistor, the dropout voltage is very low-typically 300 mV at 150 mA of load current (TPS76433)-and is directly proportional to the load current. Since the PMOS pass element is a voltage-driven device, the quiescent current of TPS76433 is very low (140 µA maximum) and is stable over the entire range of output load current (0 mA to 150 mA). Intended for use in portable systems such as laptops and cellular phones, the low-dropout voltage feature and low-power operation of TPS76433 result in a significant increase in system battery operating life.

    The TPS76433 also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current to 1 µA maximum at T_J = 25.The TPS764xx is offered in 2.5-V, 2.7-V, 2.8-V, 3.0-V, and 3.3-V fixed-voltages.