描述 Description

The TPS713xx family of low-dropout (LDO) voltage regulators is tailored to noise-sensitive and RF appli- cations. These products feature dual 250 mA LDOs with ultralow noise, high power-supply rejection ratio (PSRR), and fast transient and start-up response. These devices also feature an integrated supply voltage supervisor (SVS) that monitors the voltage at OUT2 and will assert if the voltage falls to 95% (typical) of the measured output. Each regulator output is stable with low-cost 2.2 μF ceramic output capacitors and features very low dropout voltages (125 mV typical at 250 mA). Each regulator achieves fast start-up times (approximately 60 μs with a 0.001 μF bypass capacitor) while consuming very low quiescent current (300 μA typical with both outputs enabled). When the device is placed in standby mode, the supply current is reduced to less than 0.3 μA typical. Each regulator exhibits approximately 32 μVrms of output voltage noise with VOUT = 2.8 V and a 0.01 μF noise reduction (NR) capacitor. Applications with analog components that are noise-sensitive, such as portable RF electronics, will benefit from high PSRR, low noise, and fast line and load transient features. The TPS713xx family is offered in a thin 3mm x 3mm SON package and is fully specified from ?40°C to +125°C (TJ).

特性 Features

? Dual 250 mA High-Performance RF LDOs
? Integrated Supply Voltage Supervisor Monitors VOUT2
? Available in Fixed and Adjustable Voltage Options (1.2 V to 5.5 V)
? High PSRR: 65 dB at 10 kHz
? UltraLow Noise: 32 μVrms
? Fast Start-Up Time: 60 μs
? Stable with 2.2 μF Ceramic Capacitor
? Excellent Load/Line Transient Response
? Very Low Dropout Voltage: 125 mV at 250 mA
? Independent Enable Pins
? Thermal Shutdown and Independent Current Limit
? Available in Thermally-Enhanced SON Package: 3mm x 3mm x 1mm
? APPLICATIONS
? Cellular and Cordless Phones
? Wireless PDA/Handheld Products
? PCMCIA/Wireless LAN Applications
? Digital Camera/Camcorder/Internet Audio
? DSP/FPGA/ASIC/Controllers and Processors