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The DIODES Advantage

The AP7372, with its very low 8µVRMS noise and large PSRR,

is ideal for noise-sensitive applications.

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 2.7V to

20V, enabling operation in many standard

power rail systems. It delivers 200mA output

current with fixed output voltage options of

1.8V, 2.5V, 3.3V and 5.0V, and is also

available in an adjustable version with a

nominal 1.2V 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 soft-

start using a small capacitor on the SS pin.

The AP7372 is available in the tiny

U-WLB1012-6 (Type A1); occupying only

1mm by 1.2mm and enabling it to be used in

high-power-density applications across

a -40ºC to +125ºC ambient temperature

range.

Low 8µVRMS, High-PSRR 20V 200mA LDO Reduces Noise and

Ripple on Power Rails in Noise-Sensitive Applications

AP7372

▪ 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 2.7V to 20V Input Voltage Range:

Supports Li-Ion, 3.3V, 5V, and 12V 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

August 2025

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