## Technical Overview of ADP223ACPZ-R7 The **ADP223ACPZ-R7** is a high-performance, dual-output, low dropout (LDO) linear regulator manufactured by **Analog Devices**. It is specifically designed to provide high power supply rejection ratio (PSRR) and low noise, making it ideal for noise-sensitive analog circuits. --- ### 1. Key Technical Specifications | Parameter | Value / Specification | | :--- | :--- | | **Input Voltage Range** | 2.5 V to 5.5 V | | **Output Current** | 300 mA per channel (600 mA total) | | **Output Voltage Options** | Adjustable (via external resistors) | | **Dropout Voltage** | 170 mV (at 300 mA load) | | **PSRR** | 68 dB at 1 kHz; 60 dB at 10 kHz | | **Quiescent Current** | 110 µA (both LDOs active, no load) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | LFCSP-8 (2mm x 2mm) | --- ### 2. Functional Features * **Dual Independent LDOs:** Two separate regulators in a single compact package allow for independent power rails. * **Individual Enable Pins:** Each regulator has its own `EN` pin, allowing for precise power sequencing. * **Low Noise Performance:** Optimized for RF and sensitive analog applications where power supply ripples can interfere with performance. * **Protection Circuitry:** * **Current-Limit Protection:** Prevents damage during short-circuit conditions. * **Thermal Shutdown (TSD):** Automatically shuts down the device if the junction temperature exceeds safe limits. * **Stability:** Designed to be stable with small, low-ESR ceramic capacitors (1 µF). --- ### 3. Pin Configuration Summary | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | VIN | Input Voltage supply. | | 2 | EN1 | Enable input for LDO1 (Active High). | | 3 | EN2 | Enable input for LDO2 (Active High). | | 4 | ADJ1 | Feedback/Adjust pin for LDO1. | | 5 | ADJ2 | Feedback/Adjust pin for LDO2. | | 6 | VOUT2 | Regulated output voltage for channel 2. | | 7 | VOUT1 | Regulated output voltage for channel 1. | | 8 | GND | Ground. | | EP | Pad | Exposed Pad (should be soldered to PCB ground). | --- ### 4. Typical Application Circuit To set the output voltage ($V_{OUT}$), an external resistor divider is required. The formula used is: ```math V_{OUT} = 1.20V \times (1 + R1 / R2) ``` Where **1.20V** is the internal reference voltage. --- ### 5. Common Applications * **Mobile Phones:** Powering camera modules or sensors. * **RF Transceivers:** Providing clean power to noise-sensitive radio components. * **Medical Equipment:** High-precision instrumentation. * **IoT Devices:** Space-constrained battery-powered electronics.