## ADP190ACBZ-R7 Overview The **ADP190ACBZ-R7** is a high-side load switch designed for efficient power domain isolation in portable electronics. It is manufactured by **Analog Devices** and is specifically engineered to handle high currents while maintaining a very low "on" resistance to minimize power loss. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 1.1 V to 3.6 V | | **Continuous Current** | 500 mA (Maximum) | | **On-Resistance ($R_{DS(ON)}$)** | 105 mΩ (at 1.8 V) | | **Quiescent Current** | 2 μA (Ultra-low) | | **Shutdown Current** | < 1 μA | | **Package Type** | 4-ball WLCSP (0.8 mm x 0.8 mm) | --- ### 2. Functional Features The ADP190 includes several integrated features that simplify circuit design: * **Low $R_{DS(ON)}$:** Ensures minimal voltage drop across the switch, which is critical for battery-operated devices. * **Logic Level Enable:** The `EN` pin allows the switch to be controlled by standard GPIO signals (compatible with 1.2 V to 3.3 V logic). * **Small Footprint:** The Wafer Level Chip Scale Package (WLCSP) allows it to be used in space-constrained designs like smartphones or wearables. * **Power Domain Isolation:** It effectively disconnects sub-systems (like sensors or cameras) when they are not in use to extend battery life. --- ### 3. Pin Configuration The device is housed in a 4-ball grid arrangement: | Pin | Mnemonic | Description | | :--- | :--- | :--- | | **A1** | **VIN** | Input voltage source. | | **A2** | **VOUT** | Output voltage to the load. | | **B1** | **EN** | Enable input. High = On, Low = Off. | | **B2** | **GND** | Ground reference. | --- ### 4. Typical Application Circuit In a typical scenario, the ADP190 sits between a battery (or regulated rail) and a peripheral component. ```c // Conceptual Block Diagram [ Power Source (1.8V) ] ---> [ VIN (A1) ] | [ ADP190 Switch ] <--- [ MCU GPIO (Control Signal) ] | [ Peripheral Load ] <------- [ VOUT (A2) ] ``` --- ### 5. Common Use Cases * **Mobile Phones:** Turning off camera modules or GPS chips when idle. * **Digital Cameras:** Managing power to image sensors. * **Portable Medical Devices:** Isolating sensitive analog front-ends. * **Wearables:** Minimizing standby power consumption in smartwatches.