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The RTQ2537E is a high-current (4A), low-noise (6.8μVRMS), high accuracy (1% over line, load, and temperature), low-dropout linear regulator (LDO) capable of sourcing 4A with an extremely low dropout (maximum 240mV). The device supports a single input supply voltage as low to 1.1V, which makes it easy to use.<br /><br />The low-noise, high PSRR, and high output current capability make the RTQ2537E 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 RTQ2537E is ideal for powering digital loads such as FPGAs, DSPs, and ASICs.<br /><br />The external enable control and power good indicator function make 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<sub>J</sub> = -40°C to 125°C and is offered in the VQFN-20L 3.5x3.5 package.
RTQ2537E Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>Input Voltage Range: 1.1V to 6.5V </li><li>Two Output Voltage Modes <ul class="lv2"> <li></li><li>0.5V to 5.5V (Set by a Resistive Divider) </li><li>0.5V to 2.075V (Set via PCB Layout, No External Resistor Required) </li></ul> </li><li>Accurate Output Voltage Accuracy (1%) Over Line, Load, and Temperature </li><li>PSRR: 44dB at 500kHz </li><li>Noise Immunity <ul class="lv2"> <li></li><li>6.8μVRMS at 0.5V Output </li><li>16μVRMS at 5V Output </li></ul> </li><li>Dropout Voltage: 240mV Maximum at 4A </li><li>Enable Control </li><li>Programmable Soft-Start Output </li><li>Stable with a 47μF or Larger Ceramic Output Capacitor </li><li>Support Power-Good Indicator Function </li><li>Junction Temperature Range: -40°C to 125°C </li></ul></div>
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RTQ2537E Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Portable Electronic Devices </li><li>Wireless Infrastructures: SerDes, FPGA, DSP </li><li>RF, IF, Components: VCO, ADC, DAC, LVDS </li></ul></div>
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