The **ADP165ACBZ-2.85-R7** is a high-performance, low quiescent current, low dropout (LDO) linear regulator manufactured by Analog Devices. It is specifically designed for battery-powered portable devices where space and power efficiency are critical. --- ### ## Technical Specifications | Parameter | Value | | :--- | :--- | | **Manufacturer** | Analog Devices Inc. | | **Input Voltage Range** | 2.2V to 5.5V | | **Output Voltage (Fixed)** | 2.85V | | **Output Current** | 150 mA | | **Dropout Voltage** | 120 mV (at 150 mA load) | | **Quiescent Current ($I_q$)** | 42 µA (Typical at full load) | | **PSRR (at 1 kHz)** | 72 dB | | **Package / Case** | 4-Ball WLCSP (Wafer Level Chip Scale Package) | --- ### ## Key Electronic Features 1. **Low Dropout (LDO) Operation:** The device requires only a very small difference between the input and output voltage (120mV) to maintain a stable 2.85V output. This extends battery life as the battery voltage drops over time. 2. **Ultra-Small Footprint:** It uses a **WLCSP** package (approximately 0.97 mm × 0.97 mm), making it one of the smallest voltage regulation solutions available for high-density circuit boards. 3. **Stability with Small Capacitors:** The internal compensation circuit is optimized for stability using small **1 µF ceramic input and output capacitors**, reducing the overall Bill of Materials (BOM) size. 4. **Shutdown Mode:** The device features an "Enable" pin. When pulled low, the regulator enters a shutdown mode, consuming less than **1 µA**, which is essential for preserving energy in standby modes. 5. **Protection Circuitry:** * **Thermal Overload Protection:** Prevents damage if the junction temperature exceeds safe limits. * **Short-Circuit Protection:** Limits current flow if the output is grounded. --- ### ## Pin Configuration (4-Ball WLCSP) | Pin Ball | Name | Description | | :--- | :--- | :--- | | **A1** | VIN | Regulator Input Supply. | | **A2** | VOUT | Regulated Output Voltage (2.85V). | | **B1** | EN | Enable Input (High = On, Low = Off). | | **B2** | GND | Ground Reference. | --- ### ## Typical Applications * **Mobile Phones:** Powering camera modules or RF stages. * **Digital Cameras:** Low-noise power for image sensors. * **Portable Medical Devices:** Stable voltage for sensors and microcontrollers. * **Wearables:** Optimized for ultra-small PCB area and low power consumption.