The AP7372 low dropout regulator (LDO) offers ultra-low 8µVRMS noise and high power supply rejection-ratio (PSRR), making it ideal for power supplies in noise-sensitive signal chain blocks such as precision ADC/DAC, VCO, medical devices, and instrumentation.
This high-input-voltage LDO operates from 2.7V to 20V, suitable for many standard power rail systems. It delivers 200mA output current and is available with fixed output voltage options of 1.8V, 2.5V, 3.3V, and 5.0V. An adjustable version is also available, providing a nominal 1.2V output.
The fixed-output voltages of the AP7372 can be adjusted above their nominal values using an external feedback divider. The device supports an adjustable output ranging from VOUT(NOM) down to VIN minus the dropout voltage (VDO).
It features excellent line and load transient response, requiring only a small 2.2µF ceramic output capacitor. The AP7372 also supports adjustable soft-start functionality via a small capacitor connected to the SS pin, allowing for optimization of start-up time according to system needs.
The AP7372 is housed in the compact U-WLB1012-6 (Type A1) package, measuring only 1mm by 1.2mm. This small footprint enables its use in high-power-density applications across an ambient temperature range of -40°C to +125°C.
The DIODES Advantage
The AP7372 excels in noise-sensitive applications due to its very low 8µVRMS noise and high PSRR.
- Low Noise: 8µVRMS ensures minimal additive noise for precision analog circuits.
- High PSRR: 90dB at 10kHz, 70dB at 100kHz, and 52dB at 1MHz, effectively rejecting input ripples and noise to improve signal-to-noise ratios.
- Wide Input Voltage Range: Supports 2.7V to 20V, compatible with Li-Ion, 3.3V, 5V, and 12V power rails.
- Four Fixed Output Voltages: Available with ±0.8% output accuracy, with the option to adjust the output voltage if necessary.
- Adjustable Soft-Start: Easily configurable with an external capacitor for optimized start-up times.
Applications
The AP7372 provides 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
Typical Application
AP7372-50 with Fixed 5V Output Voltage:
AP7372-xx with Adjustable Output by R1 and R2:
Extremely Low Noise LDO Portfolio
| Part Number | VIN (V) | Adj. VOUT (V) | Fixed VOUT (V) | IOUT (mA) | VDROP @ Full Load (mV) | Noise (µVRMS) | PSRR (@10kHz) (dB) | Enable | Package |
|---|---|---|---|---|---|---|---|---|---|
| AP7372 | 2.7 to 20 | Yes (1.2) | 1.8, 2.5, 3.3, 5.0 | 200 | 120 | 8 | 90 | Yes | U-WLB1012-6 (Type A1) |
| AP7353D | 2.0 to 5.5 | No | 1.8, 2.5, 2.8, 2.85, 2.9, 3.0, 3.1, 3.2, 3.3, 3.6, 4.5, 4.7, 5.0 | 250 | 74 | 10 | 70 | Yes | X1-WLB0707-4, X2-DFN1010-4 |
Ordering Information
| Orderable Part Number | Output Voltage | Compliance (Only Automotive Supports PPAP) | Package | Moisture Sensitivity | Quantity | Carrier |
|---|---|---|---|---|---|---|
| AP7372-12CBA6-7 | 1.2V Adj. | Standard | U-WLB1012-6 (Type A1) (1.0mm x 1.2mm) (CBA6) | MSL-1 | 3,000 | 7" Tape & Reel |
| AP7372-18CBA6-7 | 1.8V | |||||
| AP7372-25CBA6-7 | 2.5V | |||||
| AP7372-33CBA6-7 | 3.3V | |||||
| AP7372-50CBA6-7 | 5.0V |
