General Description

The RTQ2521A is a high-current (1.5A), low-noise

(7μVRMS), high accuracy (1 over line, load, and

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

of sourcing 1.5A with extremely low dropout (max. 110mV).

The device supports single input supply voltage as low to

1.1V that makes it easy to use.

The low noise, high PSRR and high output current capability

makes the RTQ2521A 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 RTQ2521A is

ideal for powering digital loads such as FPGAs, DSPs,

and ASICs.

The external enable control and power good indicator

function makes the sequence control easier. The output

noise immunity is enhanced by adding external bypass

capacitor on NR/SS pin. The device is fully specified over

the temperature range of TJ = −40°C to 125°C and is offered

in the WDFN-8EL 3x3 package.

Features

 Input Voltage Range : 1.1V to 6.5V

 Output Voltage Range : 0.5V to 5.5V

 Accurate Output Voltage Accuracy (1) Over Line,

Load and Temperature

 Ultra High PSRR : 38dB at 500kHz

 Excellent Noise Immunity

7μVRMS at 0.5V Output

10μVRMS at 3.3V Output

 Ultra Low Dropout Voltage : 110mV at 1.5A

 Enable Control

 Programmable Soft-Start Output

 Stable with a 10μF or Larger Ceramic Output

Capacitor

 Support Power-Good Indicator Function

 RoHS Compliant and Halogen Free

Applications

 Portable Electronic Device

 Wireless Infrastructure : SerDes, FPGA, DSP

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