Diodes Incorporated has introduced a line of low-dropout regulators. The AP7372 low dropout regulator, with its very low 8µVRMS noise and large high-frequency power supply rejection-ratio (PSRR), is ideal for power supplies in noise-sensitive signal chain blocks like precision ADC/DAC, VCO, medical devices, and instrumentation.

This high-VIN LDO operates from 2.7 V to 20 V, enabling operation in many standard power rail systems. It delivers 200 mA output current with fixed output voltage options of 1.8 V, 2.5 V, 3.3V and 5.0 V, and is also available in an adjustable version with a nominal 1.2 V output.

The AP7372’s fixed-output voltages can be adjusted above the nominal value using an external feedback divider. The device supports an adjustable output from VOUT(NOM) to VIN (minus the dropout voltage, VDO). It also has excellent line and load transient response with a small 2.2μF ceramic output capacitor, and it supports adjustable softstart using a small capacitor on the SS pin.

The AP7372 is available in the tiny U-WLB1012-6 (Type A1); occupying only 1mm by 1.2 mm and enabling it to be used in high-power-density applications across a -40ºC to +125ºC ambient temperature range.

Advantage

Low 8µVRMS, High-PSRR 20 V 200 mA LDO Reduces Noise and Ripple on Power Rails in Noise-Sensitive Applications

• Low Noise: 8μVrms: Ensures minimal additive noise in power supplies for precision ADC, DAC, VCO, medical devices, and instrumentation
• High PSRR (90dB@10kHz, 70dB@100kHz, 52dB@1MHz): Rejects input ripples and noise across a wide frequency range, improving signal-to-noise ratios
• Wide 2.7 V to 20 V Input Voltage Range: Supports Li-Ion, 3.3 V, 5 V, and 12 V power rails
• Four-Fixed Output Voltages with ±0.8% Output Accuracy, Which Can Be Adjusted: Maintains high output voltage accuracy with the versatility to adjust the output voltage if necessary
• Easily Adjustable Soft-Start Time by External Capacitor: Allows optimization of start-up time to system needs

Applications

Low noise point-of-load regulation for:

• ADC and DAC circuits
• Precision signal conditioning
• VCO VTUNE controls
• Communications and infrastructures
• Medical and healthcare equipment
• Industrial equipment
• Instrumentation

Click here to learn more about AP7372.