General Description

The RTQ2539A is a high-current (3A), low-noise

(6.8μVRMS), high accuracy (1 over line, load, and

temperature), low-dropout linear regulator (LDO) capable

of sourcing 3A with extremely low dropout (max. 180mV).

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 RTQ2539A ideal to power noise-sensitive

devices such as analog-to-digital converters (ADCs),

digital-to-analog converters (DACs), and RF components.

With very high accuracy, remote sensing, and soft-start

capabilities to reduce inrush current, the RTQ2539A 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 a WQFN-12L 2.2x2.5 (FC) package.

Features

 Input Voltage Range : 1.1V to 6.5V

 Output Voltage Range : 0.8 V to 5.5V

 Accurate Output Voltage Accuracy (1) Over Line,

Load and Temperature

 Ultra High PSRR : 40dB at 500kHz

 Excellent Noise Immunity

6.8μVRMS at 0.8V Output

10μVRMS at 3.3V Output

 Ultra Low Dropout Voltage : 180mV at 3A

 Enable Control

 Programmable Soft-Start Output

 Stable with a 47μF or Larger Ceramic Output

Capacitor

 Support Power-Good Indicator Function

 RoHS Compliant and Halogen Free

Applications

 Portable Electronic Devices

 Wireless Infrastructures : SerDes, FPGA, DSP

 RF, IF Components : VCO, ADC, DAC, LVDS