RTQ2539C Datasheet | Richtek

Description The RTQ2539C is a high-current (3A), low-noise (6.8VRMS), high accuracy (1% over line, load, and temperature), low-dropout linear regulator (LDO) capable of sourcing 3A with extremely low dropout (max. 180m V for RTQ2539CGQV and max. 130m V for RTQ2539CGQWF). The device supports single input supply voltage as low to 1.1V, which makes it easy to use. The low-noise, high PSRR and high output current capability makes the RTQ2539C ideal to power noisesensitive devices such as analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and RF ponents. With very high accuracy, remote sensing, and soft-start capabilities to reduce inrush current, the RTQ2539C is ideal for powering digital loads such as FPGAs, DSPs, and ASICs. The external enable control and power good indicator function make the control sequence easier. The output noise immunity is enhanced by adding external bypass capacitor on the NR/SS pin. The device is fully specified over the temperature range of TJ = - 40°C to 125°C and is offered in the WQFN-12L 2.2x2.5(FC) and VQFN-20L 3.5x3.5 packages. 2 Features - Input Voltage Range: 1.1V to 6.5V - Two Output Voltage Modes - 0.5V to 5.5V (Set by a Resistive Divider) - 0.5V to 3.65V (For RTQ2539CGQV only, Set via PCB Layout, No External Resistor Required) - Accurate Output Voltage Accuracy (1%) Over Line, Load and Temperature - PSRR: 40d B at 500k Hz - Noise Immunity - 6.8VRMS at 0.8V Output - 10VRMS at 3.3V Output - Dropout Voltage: - 180m V Max. at 3A for VQFN-20L 3.5x3.5 - 130m V Max. at 3A for WQFN-12L 2.2x2.5 - Enable Control - Programmable Soft-Start Output - Stable with a 47F or Larger Ceramic Output Capacitor - Support Power-Good Indicator Function 3 Applications - Portable Electronic Devices - Wireless Infrastructures: Ser Des, FPGA, DSP - RD, IF, ponents: VCO, ADC, DAC, LVDS 4 Simplified Application Circuit Power Good VOUT Enable VOUT FB R3 PGOOD CNR/SS EN...