Overview
The ADP7105ACPZ-3.3-R7 is a CMOS, low dropout (LDO) linear regulator produced by Analog Devices Inc. This regulator operates from an input voltage range of 3.3 V to 20 V and provides up to 500 mA of output current. It is designed for high-performance analog and mixed-signal circuits, offering excellent power supply rejection and low noise characteristics. The ADP7105 is available in both fixed and adjustable output voltage configurations, with the ADP7105ACPZ-3.3-R7 specifically providing a fixed output voltage of 3.3 V.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 3.3 V to 20 V |
| Maximum Output Current | 500 mA |
| Output Voltage (Fixed) | 3.3 V |
| Output Voltage (Adjustable) | 1.22 V to 19 V (via external feedback divider) |
| Low Dropout Voltage | 350 mV at 500 mA |
| Noise Voltage | 15 µV rms |
| Power Supply Rejection Ratio (PSRR) | 60 dB at 10 kHz, VOUT = 3.3 V |
| Package Types | 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC |
Key Features
- High input voltage range from 3.3 V to 20 V
- Low dropout voltage of 350 mV at 500 mA
- Low noise: 15 µV rms for fixed output versions
- Excellent power supply rejection ratio (PSRR) of 60 dB at 10 kHz
- Reverse current protection
- User-programmable precision undervoltage lockout (UVLO) function
- External soft start capacitor for programmable startup
- Digital power-good output for power system monitoring
- Compact packaging options including 8-lead LFCSP and SOIC
Applications
The ADP7105ACPZ-3.3-R7 is ideal for regulating high-performance analog and mixed-signal circuits. It is suitable for a variety of applications, including:
- Analog and mixed-signal circuits requiring high input voltage and low noise
- Power supply systems needing precise voltage regulation and monitoring
- Industrial and medical devices requiring reliable and compact power solutions
- Communication and networking equipment with stringent power requirements
Q & A
- What is the input voltage range of the ADP7105ACPZ-3.3-R7?
The input voltage range is from 3.3 V to 20 V.
- What is the maximum output current of the ADP7105ACPZ-3.3-R7?
The maximum output current is 500 mA.
- What is the fixed output voltage of the ADP7105ACPZ-3.3-R7?
The fixed output voltage is 3.3 V.
- What is the noise voltage of the ADP7105ACPZ-3.3-R7?
The noise voltage is 15 µV rms.
- Does the ADP7105ACPZ-3.3-R7 have reverse current protection?
- Can the startup of the ADP7105ACPZ-3.3-R7 be programmed?
- What is the power supply rejection ratio (PSRR) of the ADP7105ACPZ-3.3-R7?
The PSRR is 60 dB at 10 kHz, VOUT = 3.3 V.
- Does the ADP7105ACPZ-3.3-R7 have a digital power-good output?
- What are the available package types for the ADP7105ACPZ-3.3-R7?
The available package types are 8-lead, 3 mm × 3 mm LFCSP and 8-lead SOIC.
- What is the purpose of the undervoltage lockout (UVLO) function in the ADP7105ACPZ-3.3-R7?
The UVLO function facilitates the sequencing of multiple power supplies and can be user-programmed for precision.
