The **ADP162ACBZ-4.2-R7** is a high-performance, ultra-low quiescent current, low dropout (LDO) linear regulator manufactured by Analog Devices. It is specifically designed for portable and battery-powered applications where power efficiency and space constraints are critical. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 2.2V to 5.5V | | **Fixed Output Voltage** | 4.2V | | **Maximum Output Current** | 150 mA | | **Dropout Voltage** | 150 mV (at 150 mA load) | | **Quiescent Current (Low Load)** | 560 nA (Typical) | | **Shutdown Current** | < 50 nA | | **Package Type** | 4-ball WLCSP (Wafer Level Chip Scale Package) | | **Operating Temperature** | -40°C to +125°C | --- ### ### Key Electronic Features 1. **Ultra-Low Quiescent Current ($I_Q$):** The most defining feature of this part is its extremely low $I_Q$. Even under light load conditions, it consumes only about 560 nanoamps, which significantly extends battery life in "always-on" systems. 2. **Stability with Small Capacitors:** The device is designed to be stable with small $1 \mu F$ ceramic input and output capacitors. This minimizes the total PCB footprint. 3. **Low Dropout (LDO) Performance:** With a dropout voltage of only 150 mV at full load, it allows the battery to be discharged to a level very close to the output voltage (4.2V) before regulation is lost. 4. **Protection Circuitry:** It includes integrated protection features such as: * **Short-circuit protection:** Prevents damage during fault conditions. * **Thermal Overload Protection:** Shuts down the device if the junction temperature exceeds safety limits. --- ### ### Typical Application Circuit The ADP162 requires very few external components to operate: ```mermaid graph LR Vin[Input Voltage 4.5V-5.5V] --> Cin(1uF Cap) Cin --> IN[Pin: VIN] IN --> IC[ADP162] EN[Enable Pin] --> IC IC --> OUT[Pin: VOUT] OUT --> Cout(1uF Cap) Cout --> Vout[4.2V Output] IC --> GND[Ground] ``` --- ### ### Part Number Breakdown (ADP162ACBZ-4.2-R7) * **ADP162:** Base series number. * **A:** Performance grade/revision. * **CBZ:** Indicates the WLCSP package (Halogen-free/RoHS compliant). * **4.2:** Fixed output voltage of 4.2 Volts. * **R7:** Packaging format (7-inch reel containing 3,000 units).