## ADP2311ACPZ-2-R7 Technical Overview The **ADP2311ACPZ-2-R7** is a high-efficiency, dual-output, step-down (buck) DC-to-DC regulator. It is designed by Analog Devices and is widely used in systems requiring multiple voltage rails from a single input source, especially where space is at a premium. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Analog Devices | | **Input Voltage Range** | 4.5V to 18V | | **Output Channels** | Dual (2) | | **Output Current** | 1A per channel | | **Switching Frequency** | 300 kHz to 2.5 MHz (Sync) / 750 kHz Default | | **Output Voltage Range** | Adjustable from 0.6V to 0.9 × VIN | | **Package** | 24-Lead LFCSP (4mm x 4mm) | | **Operating Temp** | -40°C to +125°C | --- ### 2. Core Features * **Integrated Power MOSFETs:** The device includes internal high-side and low-side N-channel MOSFETs, which reduces the external component count and simplifies PCB layout. * **180° Out-of-Phase Operation:** The two channels operate 180 degrees out of phase. This significantly reduces the input ripple current and the size of the required input capacitance. * **Precision Enable:** Independent enable pins for each channel allow for specific power-up sequencing. * **Power Good Output:** An open-drain output indicates when the output voltage is within the target range. * **Protection Circuitry:** * **OCP:** Overcurrent protection (hiccup mode). * **TSD:** Thermal shutdown. * **UVLO:** Undervoltage lockout. --- ### 3. Application Areas Due to its compact size and high efficiency, this part is commonly found in: 1. **Intermediate Bus Voltage Conversion:** Stepping down 12V or 5V rails. 2. **Communications & Networking:** Powering FPGAs, ASICs, and DSPs. 3. **Industrial/Instrumentation:** Reliable power for sensors and control units. 4. **Consumer Electronics:** Set-top boxes and high-end routers. --- ### 4. Part Number Breakdown * **ADP2311:** Base model (Dual 1A Buck Regulator). * **ACPZ:** Package type (LFCSP - Lead Frame Chip Scale Package) and RoHS compliance (Z). * **2:** Specific version/sub-variant code. * **R7:** Packaging format (7-inch Tape and Reel, typically 1,500 units). --- ### 5. Typical Circuit Configuration ```text Input (4.5V - 18V) | [CIN] | +-------------+ | ADP2311 |----[Inductor 1]----[COUT1]----> Output 1 (1A) | | | |----[Inductor 2]----[COUT2]----> Output 2 (1A) +-------------+ | [GND] ```