Overview
The ADM7172ACPZ-2.5-R7 is a CMOS, low dropout linear regulator (LDO) manufactured by Analog Devices Inc. This regulator 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 high-performance analog and mixed-signal circuits, offering excellent line and load transient response with a small 4.7 μF ceramic output capacitor. The device features ultralow noise, high power supply rejection ratio (PSRR), and fast transient response, making it ideal for a variety of applications requiring stable and efficient voltage regulation.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.3 V to 6.5 V | V |
| Output Current | Up to 2 A | A |
| Output Voltage | 2.5 V (fixed for this model) | V |
| Output Noise | 5 μV rms | V |
| PSRR | High | - |
| Load Transient Response | Typically 1.5 μs for a 1 mA to 1.5 A load step | μs |
| Package Type | 8-lead, 3 mm × 3 mm LFCSP | - |
| Enable Threshold | 3.6 V with 300 mV hysteresis | V |
| Current Limit | Typically 3 A | A |
| Thermal Shutdown Temperature | Typically 150°C | °C |
Key Features
- Ultralow Noise: The regulator has an output noise of 5 μV rms, independent of the output voltage.
- High PSRR: Excellent power supply rejection ratio, ensuring stable output voltage despite input voltage variations.
- Fast Transient Response: Achieves excellent line and load transient response with a small 4.7 μF ceramic output capacitor.
- Compact Package: Available in an 8-lead, 3 mm × 3 mm LFCSP, providing a compact and low-profile solution.
- Soft Start Capability: Internal soft start feature limits inrush current when the output is enabled, adjustable via the soft start pin.
- Current Limit and Thermal Protection: Includes current limit protection (typically 3 A) and thermal shutdown protection to prevent overheating.
- Undervoltage Lockout: Internal undervoltage lockout circuit disables the output voltage when the input voltage falls below a certain threshold).
Applications
- High-Performance Analog and Mixed-Signal Circuits: Ideal for regulating high-performance analog and mixed-signal circuits operating from 6 V down to 1.2 V rails).
- Power Management in Embedded Systems: Suitable for power management in embedded systems requiring stable and efficient voltage regulation.
- Industrial and Automotive Systems: Can be used in industrial and automotive systems where high reliability and low noise are critical.
- Telecommunications and Networking Equipment: Applicable in telecommunications and networking equipment that demand stable power supply.
Q & A
- What is the input voltage range of the ADM7172ACPZ-2.5-R7?
The input voltage range is from 2.3 V to 6.5 V).
- What is the maximum output current of the ADM7172ACPZ-2.5-R7?
The maximum output current is up to 2 A).
- What is the output voltage of the ADM7172ACPZ-2.5-R7?
The output voltage is fixed at 2.5 V for this model).
- What is the output noise of the ADM7172ACPZ-2.5-R7?
The output noise is 5 μV rms).
- What type of package does the ADM7172ACPZ-2.5-R7 come in?
The device is available in an 8-lead, 3 mm × 3 mm LFCSP package).
- Does the ADM7172ACPZ-2.5-R7 have current limit and thermal protection features?
Yes, it includes current limit protection (typically 3 A) and thermal shutdown protection).
- What is the purpose of the soft start feature in the ADM7172ACPZ-2.5-R7?
The soft start feature limits the inrush current when the output is enabled, adjustable via the soft start pin).
- What is the enable threshold voltage for the ADM7172ACPZ-2.5-R7?
The enable threshold voltage is 3.6 V with a hysteresis of 300 mV).
- What type of capacitors are recommended for use with the ADM7172ACPZ-2.5-R7?
Good quality ceramic capacitors with X5R or X7R dielectrics and a voltage rating of 6.3 V to 100 V are recommended).
- What is the thermal shutdown temperature for the ADM7172ACPZ-2.5-R7?
The thermal shutdown temperature is typically 150°C).
