The **ADP196ACBZ-R7** is a high-side load switch manufactured by Analog Devices. It is designed specifically to control power rails in mobile and space-constrained electronics, offering low "on" resistance and a very small physical footprint. --- ## 1. Technical Specifications The following table summarizes the primary electrical characteristics of the ADP196: | Parameter | Specification | | :--- | :--- | | **Input Voltage Range** | 1.1 V to 3.6 V | | **Continuous Current** | Up to 3.0 A | | **On-Resistance ($R_{DS(on)}$)** | Typ. 10 mΩ (at 1.8 V) | | **Quiescent Current** | Typ. 1.0 µA (Enabled, No load) | | **Shutdown Current** | < 1.0 µA | | **Package Type** | 6-ball WLCSP (0.95 mm × 1.45 mm) | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Key Features and Functionality ### A. Ultralow On-Resistance The device utilizes a low-resistance P-channel MOSFET. The 10 mΩ resistance is critical because it minimizes the voltage drop across the switch, ensuring that the power rail remains stable and heat dissipation is kept to a minimum even at high currents (3A). ### B. Logic-Controlled Enable The device features an **EN** (Enable) pin. - When the EN pin is driven high, the switch closes and allows power to flow from $V_{IN}$ to $V_{OUT}$. - When driven low, it disconnects the load, significantly reducing power consumption. ### C. Precision Enable Threshold The enable input has a precise threshold, allowing it to be used not just for simple switching, but also for power-on sequencing where specific voltage levels must be met before a peripheral turns on. --- ## 3. Pin Configuration (WLCSP) Since the device is in a Wafer Level Chip Scale Package (WLCSP), the balls are arranged as follows: | Ball Name | Function | | :--- | :--- | | **VIN** | Input Power Supply (connect to the source voltage). | | **VOUT** | Output Power (connected to the load). | | **EN** | Enable Input. High = On, Low = Off. | | **GND** | Ground reference for the internal control logic. | --- ## 4. Typical Applications The ADP196 is commonly found in: * **Mobile Handsets:** To isolate power to high-drain components like cameras or GPS modules when not in use. * **Digital Cameras:** Managing power zones to extend battery life. * **Portable Medical Devices:** Controlling sensitive sensor power rails. * **Tablets/Laptops:** Used in power sequencing for various peripheral rails. --- ## 5. Design Considerations (Code Example) While the device is hardware-based, it is often controlled via GPIO from a microcontroller. Here is a conceptual example of how to toggle the switch using an Arduino/C++ style: ```cpp const int POWER_SWITCH_EN = 5; // Connected to EN pin of ADP196 void setup() { pinMode(POWER_SWITCH_EN, OUTPUT); // Keep the peripheral OFF initially to save power digitalWrite(POWER_SWITCH_EN, LOW); } void loop() { // Turn on the peripheral (e.g., GPS module) digitalWrite(POWER_SWITCH_EN, HIGH); delay(1000); // Shut down the peripheral digitalWrite(POWER_SWITCH_EN, LOW); delay(5000); } ```