## ADP5023ACPZ-1-R7: Technical Overview The **ADP5023ACPZ-1-R7** is a highly integrated power management unit (PMU) designed by Analog Devices. It is optimized for applications requiring low noise, high efficiency, and a compact footprint, such as smartphones, portable medical devices, and wearable electronics. --- ### 1. Key Internal Components The device integrates three high-performance regulators into a single package: | Component | Type | Current Output | Primary Use Case | | :--- | :--- | :--- | :--- | | **Buck 1** | High-Efficiency Step-Down | 800 mA | Core processors or digital rails. | | **Buck 2** | High-Efficiency Step-Down | 800 mA | Memory (DDR) or I/O interfaces. | | **LDO** | Low-Dropout Regulator | 300 mA | Sensitive analog circuitry (RF, Audio). | --- ### 2. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 2.3 V to 5.5 V | | **Switching Frequency** | 3 MHz (allows for small inductors) | | **LDO PSRR** | 60 dB at 10 kHz | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | 24-Lead LFCSP (4mm x 4mm) | | **Shutdown Current** | < 1.0 μA | --- ### 3. Functional Features * **High Switching Frequency:** Operating at 3 MHz allows the use of tiny 0603 or 0805 sized multilayer inductors, significantly reducing the total PCB area. * **Power-Good Output:** Includes a dedicated pin to signal when the output voltages are within regulation, useful for system sequencing. * **Automatic PWM/PSM Transition:** The buck regulators automatically switch between Pulse Width Modulation (PWM) for high loads and Power Save Mode (PSM) for light loads to maximize battery life. * **Thermal Shutdown:** Integrated protection circuit that shuts the device down if internal temperatures exceed safety limits. --- ### 4. Typical Application Circuit The circuit typically requires minimal external components: ```text Input (2.3V-5.5V) ----> [ ADP5023 ] ----+----> Vout1 (Buck 1: 0.8V-3.8V) | | | | | +----> Vout2 (Buck 2: 0.8V-3.8V) | | | | +---------------> Vout3 (LDO: 0.8V-4.75V) | [GND] ``` ### 5. Ordering Information Code Breakdown * **ADP5023:** Base Model Number. * **ACPZ:** LFCSP Package, RoHS Compliant. * **1:** Specific factory-set default voltage configuration. * **R7:** Tape and Reel packaging (7-inch reel). ---