Overview
The ADM7172ACPZ-3.3-R7 is a high-performance, low dropout linear regulator (LDO) manufactured by Analog Devices Inc. This CMOS LDO operates from an input voltage range of 2.3 V to 6.5 V and provides up to 2 A of output current. It is designed for use in noise-sensitive applications, offering ultralow noise and high power supply rejection ratio (PSRR). The device is available in an 8-lead, 3 mm × 3 mm LFCSP package, ensuring a compact and thermally efficient solution for various electronic systems.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Output Voltage | 3.3 V (fixed), adjustable options available |
| Maximum Output Current | 2 A |
| Dropout Voltage | 172 mV at 2 A load |
| Output Noise | 5 μV rms (100 Hz to 100 kHz) |
| PSRR | 60 dB at 100 kHz |
| Quiescent Current | 0.7 mA (no load) |
| Shutdown Current | 0.25 μA at VIN = 5 V |
| Package | 8-lead, 3 mm × 3 mm LFCSP |
| Thermal Protection | Junction temperature limit: 150°C (typical) |
Key Features
- Ultralow noise: 5 μV rms independent of output voltage
- High PSRR: 60 dB at 100 kHz
- Fast transient response: 1.5 μs for 1 mA to 1.5 A load step
- Low dropout voltage: 172 mV at 2 A load
- Enable and soft start functions
- Current limit and thermal overload protection
- Compact 8-lead LFCSP package with excellent thermal performance
Applications
- Noise-sensitive applications: analog-to-digital converters (ADCs), digital-to-analog converters (DACs), precision amplifiers, phase-locked loops (PLLs), and voltage-controlled oscillators (VCOs)
- Communications and infrastructure
- Medical and healthcare
- Industrial and instrumentation
Q & A
- What is the input voltage range of the ADM7172ACPZ-3.3-R7? The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum output current of the ADM7172ACPZ-3.3-R7? The maximum output current is 2 A.
- What is the output noise of the ADM7172ACPZ-3.3-R7? The output noise is 5 μV rms (100 Hz to 100 kHz).
- What is the PSRR of the ADM7172ACPZ-3.3-R7 at 100 kHz? The PSRR is 60 dB at 100 kHz.
- Does the ADM7172ACPZ-3.3-R7 have thermal protection? Yes, it has thermal overload protection with a junction temperature limit of 150°C (typical).
- What package type is the ADM7172ACPZ-3.3-R7 available in? It is available in an 8-lead, 3 mm × 3 mm LFCSP package.
- Can the output voltage of the ADM7172ACPZ-3.3-R7 be adjusted? Yes, while the ADM7172ACPZ-3.3-R7 is a fixed 3.3 V output, other models in the series offer adjustable output voltage options.
- What is the quiescent current of the ADM7172ACPZ-3.3-R7? The quiescent current is 0.7 mA (no load).
- Does the ADM7172ACPZ-3.3-R7 have current limit protection? Yes, it has current limit protection, limiting the output current to 3 A (typical).
- What are some typical applications of the ADM7172ACPZ-3.3-R7? Typical applications include noise-sensitive circuits such as ADCs, DACs, precision amplifiers, PLLs, and VCOs, as well as communications, medical, and industrial systems.
