RTQ2532N High-Current, Low-Noise, High-Accuracy Low-Dropout Linear Regulator

Richtek's RTQ2532N is a high-current (2 A), low-noise (6.8 μV_RMS), high-accuracy (1% over line, load, and temperature), low-dropout (LDO) linear regulator capable of sourcing 2 A with extremely low dropout (max. 125 mV). The device's output voltage is pin-selectable (up to 3.95 V) using a PCB layout without the need for external resistors, thus reducing the overall component count. Designers can achieve higher output voltage with the use of an external resistor divider. The device supports single-input supply voltage as low as 1.1 V making it easy to use.

The low-noise, high-PSRR, and high output current capability make the RTQ2532N 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 RTQ2532N is ideal for powering digital loads such as FPGAs, DSPs, and ASICs.

The external enable control and power good indicator function makes the control sequence easier. The output noise immunity is enhanced by adding an external bypass capacitor on the NR/SS pin. The device is fully specified over the temperature range of T_J = -40°C to +125°C and is offered in a VQFN-20L 3.5 x 3.5 package.