TPS73425

TPS734xx www.ti.com ........................................................................................................................................ SBVS089F – DECEMBER 2007 – REVISED FEBRUARY 2009 250mA, Low Quiescent Current, Ultra-Low Noise, High PSRR Low-Dropout Linear Regulator FEATURES 1 2 250mA Low Dropout Regulator with EN Low IQ: 44µA Multiple Output Voltage Versions Available: – Fixed Outputs of 1.0V to 4.3V Using Innovative Factory EEPROM Programming – Adjustable Outputs from 1.25V to 6.2V High PSRR: 60dB at 1kHz Ultra-low Noise: 28µVRMS Fast Start-Up Time: 45µs Stable with a Low-ESR, 2.0µF Typical Output Capacitance Excellent Load/Line Transient Response 2% Overall Accuracy (Load/Line/Temp) Very Low Dropout: 125mV at 250mA ThinSOT-23, 2mm × 2mm SON-6, and 3mm x 3mm SON-8 Packages DESCRIPTION The TPS734xx family of low-dropout (LDO), low-power linear regulators offers excellent ac performance with very low ground current. High power-supply rejection ratio (PSRR), low noise, fast start-up, and excellent line and load transient response are provided while consuming a very low 44µA (typical) ground current. The TPS734xx is stable with ceramic capacitors and uses an advanced BiCMOS fabrication process to yield a typical dropout voltage of 125mV at 250mA output. The TPS734xx uses a precision voltage reference and feedback loop to achieve overall accuracy of 2% over all load, line, process, and temperature variations. It is fully specified...