## ADP165ACBZ-3.3-R7 Technical Overview The **ADP165ACBZ-3.3-R7** is a high-performance, ultra-low quiescent current, low dropout (LDO) linear regulator. It is specifically designed for battery-powered applications where power efficiency and space-saving are critical requirements. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 3.3 V (Fixed) | | **Input Voltage Range** | 2.2 V to 5.5 V | | **Maximum Output Current** | 150 mA | | **Dropout Voltage** | 120 mV (at 150 mA load) | | **Quiescent Current ($I_Q$)** | 0.6 $\mu$A (No load) | | **Shutdown Current** | < 50 nA | | **Package Type** | 4-ball WLCSP (Wafer Level Chip Scale Package) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Core Features * **Ultra-Low Quiescent Current:** With a typical $I_Q$ of only 600 nA, this regulator significantly extends battery life in "always-on" systems. * **Stability with Small Capacitors:** It is stable with tiny 1 $\mu$F ceramic input and output capacitors, reducing the overall PCB footprint. * **Low Dropout Voltage:** The low 120 mV dropout allows the device to maintain regulation even as the battery voltage approaches the output voltage. * **Protection Circuitry:** * **Overcurrent Protection:** Limits current during short circuits. * **Thermal Overload Protection:** Shuts down the device if the junction temperature exceeds limits. * **Logic Controlled Enable:** Allows the system to put the regulator into a near-zero power state when not in use. --- ### 3. Pin Configuration (4-Ball WLCSP) | Ball No. | Name | Description | | :--- | :--- | :--- | | **A1** | **VIN** | Regulator Input Supply. | | **A2** | **VOUT** | Regulated Output Voltage (3.3V). | | **B1** | **EN** | Enable Input. High = On, Low = Off. | | **B2** | **GND** | Ground Reference. | --- ### 4. Typical Applications 1. **Mobile Devices:** Smartphones, tablets, and portable media players. 2. **Wearables:** Smartwatches and fitness trackers requiring long standby times. 3. **IoT Sensors:** Remote wireless sensors powered by coin cell batteries. 4. **Digital Cameras:** Specifically for low-power auxiliary rails. --- ### 5. Part Number Breakdown * **ADP165:** Series Name (Ultra-low $I_Q$ LDO). * **ACBZ:** Package Code (WLCSP). * **3.3:** Fixed Output Voltage (3.3 Volts). * **R7:** Tape and Reel packaging (7-inch reel).