RTQ2537 Datasheet | Richtek

Description The RTQ2537 is a high-current (4A), low-noise (6.8μVRMS), high accuracy (1% over line, load, and temperature), lowdropout linear regulator (LDO) capable of sourcing 4A with extremely low dropout (Max. 240m V). The device output voltage is pin-selectable (up to 3.95V) using a PCB layout without the need of external resistors, thus reducing overall ponent count. Designers can achieve higher output voltage with the use of external resistor divider. 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 RTQ2537 ideal to power noise-sensitive devices such as analog-to-digital converters (ADCs), digital-toanalog converters (DACs), and RF ponents. With very high accuracy, remote sensing, and soft-start capabilities to reduce inrush current, the RTQ2537 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 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 VQFN-20L 3.5x3.5 package. Features - Input Voltage Range : 1.1V to 6.5V - Two Output Voltage Modes  0.8 V to 5.5V (Set by a Resistive Divider)  0.8 V to 3.95V (Set via PCB Layout, No External Resistor Required) - Accurate Output Voltage Accuracy (1%) Over Line, Load and Temperature - Ultra High PSRR : 40d B at 500k Hz - Excellent Noise Immunity 6.8μVRMS at 0.8V Output 10μVRMS at 3.3V Output - Ultra Low Dropout Voltage : 240m V Max. at 4A - Enable Control - Programmable Soft-Start Output - Stable with a 47μF or Larger Ceramic Output Capacitor - Support Power-Good Indicator Function - Ro HS pliant and Halogen Free Applications - Portable Electronic Devices - Wireless Infrastructures : Ser Des, FPGA, DSP - RF, IF ponents : VCO, ADC, DAC, LVDS Simplified...