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Ultra-Low Noise, Ultra-High PSRR Low-Dropout Voltage Linear Regulator

Linear Technology Corp. recently announced the LT3045 an ultra-low noise, ultra-high power supply ripple rejection (PSRR) low-dropout voltage linear regulator. It’s a higher output current version of its 200-mA LT3042 ultra-low noise LDO.LT3045 Linear

The LT3045’s features, benefits, and specs:

  • Ultra-low RMS Noise: 0.8 µVRMS (10 Hz to 100 kHz)
  • Ultra-low Spot Noise: 2 nV/√ Hz at 10 kHz
  • Ultra-high PSRR: Greater than 90 dB to 10 kHz; greater than 70 dB to 2.5 MHz
  • Output Current: 500 mA
  • Wide Input Voltage Range: 1.8 to 20 V
  • Single Capacitor Improves Noise and PSRR
  • 100-µA SET Pin Current: ±1% Initial Accuracy
  • Single Resistor Programs Output Voltage
  • High Bandwidth: 1 MHz
  • Programmable Current Limit
  • Low-Dropout Voltage: 260 mV
  • Output Voltage Range: 0 to 15 V
  • Power Good Flag with Programmable Threshold
  • Fast Start-Up Capability
  • Precision Enable/UVLO
  • Can Be Paralleled for Lower Noise and Higher Current
  • Internal Current Limit with Foldback
  • Minimum Output Capacitor: 10-μF Ceramic
  • Reverse-Battery and Reverse-Current Protection
  • 12-Lead MSOP and 10-Lead 3 mm × 3 mm DFN Packages

Source: Linear Technology


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