TPS79650DCQR

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.

Applications

• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth, Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs

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