Overview
The ADM7172ACPZ-5.0-R7 is a high-performance, low dropout linear regulator (LDO) from 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 to offer high power supply rejection ratio (PSRR) and low noise, making it ideal for regulating high-performance analog and mixed-signal circuits. The device is available in a compact 8-pin LFCSP (Lead Frame Chip Scale Package) with an exposed pad, enhancing thermal performance.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.3 V to 6.5 V |
| Output Voltage | Fixed: 5.0 V (adjustable with external voltage divider) |
| Output Current | Up to 2 A |
| Dropout Voltage | Typically 172 mV |
| Package Type | 8-pin LFCSP (Lead Frame Chip Scale Package) with exposed pad |
| Enable/Disable Function | Yes, via EN pin with programmable thresholds |
| Soft Start | Internal soft start to limit inrush current |
| Thermal Overload Protection | Yes, limits junction temperature to 150°C |
| Undervoltage Lockout | Yes, with internal fixed thresholds and hysteresis |
Key Features
- High power supply rejection ratio (PSRR) and low noise
- Excellent line and load transient response with a small 4.7 μF ceramic output capacitor
- Enable/Disable function via EN pin with programmable thresholds
- Internal soft start to limit inrush current
- Thermal overload protection to limit junction temperature to 150°C
- Undervoltage lockout with internal fixed thresholds and hysteresis
- Current limit protection (typically 3 A)
Applications
The ADM7172ACPZ-5.0-R7 is suitable for a variety of high-performance applications, including:
- Regulation of high-performance analog and mixed-signal circuits
- Powering sensitive electronics in industrial, medical, and communication systems
- Use in battery-powered devices where low noise and high PSRR are critical
- Applications requiring fast transient response and low dropout voltage
Q & A
- What is the input voltage range of the ADM7172ACPZ-5.0-R7?
The input voltage range is from 2.3 V to 6.5 V.
- What is the maximum output current of the ADM7172ACPZ-5.0-R7?
The maximum output current is up to 2 A.
- How does the enable/disable function work on the ADM7172ACPZ-5.0-R7?
The enable/disable function is controlled via the EN pin, with programmable thresholds. The output turns on when the rising voltage on EN crosses the upper threshold and turns off when the falling voltage crosses the lower threshold.
- What is the dropout voltage of the ADM7172ACPZ-5.0-R7?
The dropout voltage is typically 172 mV.
- Does the ADM7172ACPZ-5.0-R7 have thermal overload protection?
Yes, it includes thermal overload protection that limits the junction temperature to 150°C.
- How does the soft start feature work on the ADM7172ACPZ-5.0-R7?
The internal soft start feature limits the inrush current when the output is enabled, reducing the start-up time to approximately 380 μs for the 5.0 V option.
- What type of package does the ADM7172ACPZ-5.0-R7 come in?
The device is packaged in an 8-pin LFCSP (Lead Frame Chip Scale Package) with an exposed pad.
- Is the output voltage of the ADM7172ACPZ-5.0-R7 adjustable?
The output voltage is fixed at 5.0 V but can be adjusted to a higher voltage using an external voltage divider.
- What is the typical load transient response time of the ADM7172ACPZ-5.0-R7?
The load transient response is typically 1.5 μs for a 1 mA to 1.5 A load step.
- Does the ADM7172ACPZ-5.0-R7 have undervoltage lockout protection?
Yes, it includes an internal undervoltage lockout circuit to disable the output voltage when the input voltage is below a certain threshold.
