The **ADP122ACPZ-2.5-R7** is a high-performance, low quiescent current, low dropout (LDO) linear regulator manufactured by Analog Devices. It is designed to provide a stable 2.5V output from a wide range of input voltages, making it ideal for battery-powered and portable electronic devices. --- ### ## Technical Specifications Below are the primary electrical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Output Voltage (Fixed)** | 2.5 V | | **Input Voltage Range** | 2.3 V to 5.5 V | | **Maximum Output Current** | 300 mA | | **Dropout Voltage** | 85 mV (typical at 300 mA load) | | **Quiescent Current ($I_q$)** | 45 µA (typical with no load) | | **Shutdown Current** | < 1 µA | | **PSRR (Power Supply Rejection Ratio)** | 60 dB at 10 kHz | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | 6-lead LFCSP (2mm x 2mm) | --- ### ### Key Features and Internal Parts 1. **Low Dropout (LDO) Architecture**: Uses a PMOS pass element, which allows the device to maintain regulation even when the input voltage is very close to the output voltage. 2. **Enable (EN) Logic**: Includes a dedicated enable pin. When pulled low, it enters a "shutdown mode" where it consumes less than 1 µA, preserving battery life. 3. **Internal Protection**: * **Thermal Overload Protection**: Shuts down the device if the junction temperature exceeds safe limits. * **Short-Circuit Protection**: Limits the output current to prevent damage during a fault. 4. **Stability**: Optimized for use with small, low-ESR ceramic capacitors (as small as 1 µF). --- ### ### Typical Application Circuit The ADP122 requires minimal external components for operation: ```text Input (2.3V-5.5V) ----[ C_in: 1uF ]----| VIN VOUT |----[ C_out: 1uF ]---- Output (2.5V) | ADP122 | Enable Signal -------------------------| EN GND |---------------------- Ground ``` --- ### ### Naming Convention Breakdown * **ADP122**: Model series (LDO Regulator). * **ACPZ**: Package code (LFCSP) and RoHS compliance (Z). * **2.5**: Fixed output voltage (2.5 Volts). * **R7**: Packaging type (7-inch Reel, usually containing 3,000 units).