The TPS796 family of low-dropout (LDO) low-power linear voltage regulators features high power-supply rejection ratio (PSRR), ultralow-noise, fast start-up, and excellent line and load transient responses in small outline, 3 × 3 VSON, SOT223-6, and TO-263 packages. Each device in the family is stable with a small, 1-µF ceramic capacitor on the output. The family uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 250 mV at 1 A). Each device achieves fast start-up times (approximately 50 µs with a 0.001-µF bypass capacitor) while consuming very low quiescent current (265 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79630 exhibits approximately 40 µV_RMS of output voltage noise at 3.0-V output, with a 0.1-µF bypass capacitor. Applications with analog components that are noise sensitive, such as portable RF electronics, benefit from the high PSRR, low noise features, and need fast response time.

Key Features

• 1-A Low-Dropout Regulator With Enable
• Available in Fixed and Adjustable (1.2 V to 5.5 V) 
  Versions
• High PSRR (53 dB at 10 kHz)
• Ultralow-Noise (40 µV_RMS, TPS79630)
• Fast Start-Up Time (50 µs)
• Stable With a 1-µF Ceramic Capacitor
• Excellent Load and Line Transient Response
• Very Low Dropout Voltage (250 mV at Full Load, 
  TPS79630)
• 3 × 3 VSON PowerPAD™, SOT223-6, and 
  TO-263 Packages