The **P1696L-AD-SH2-R** is a specific part number typically associated with a **Low Dropout (LDO) Voltage Regulator**. Below is a detailed breakdown of its technical specifications, package type, and typical applications. --- ### 1. Technical Specifications The part is generally a high-performance linear regulator designed for low-noise and low-quiescent current applications. | Feature | Specification | | :--- | :--- | | **Component Type** | CMOS Low Dropout (LDO) Regulator | | **Output Type** | Adjustable (ADJ) | | **Output Current** | Typically 300mA to 600mA (model dependent) | | **Input Voltage Range** | 2.5V to 6.0V | | **Dropout Voltage** | Low (typically < 300mV at full load) | | **Quiescent Current** | Very Low (approx. 50µA - 70µA) | | **Protection Features** | Thermal Shutdown, Over-current limiting | --- ### 2. Part Number Breakdown While nomenclature varies slightly by manufacturer (often UTC - Unisonic Technologies), the suffix usually breaks down as follows: * **P1696**: The base model series (LDO Regulator). * **L**: Lead-free / RoHS compliant. * **AD**: Adjustable output voltage (allows setting voltage via external resistors). * **SH2**: Package code, typically referring to a **SOT-223** or **SOT-25** / **SOT-23-5** package. * **R**: Tape and Reel packaging. --- ### 3. Pin Configuration (Typical SOT-23-5) If the part is in the SH2 (SOT-23-5) format, the pinout usually follows this logic: | Pin Number | Name | Description | | :--- | :--- | :--- | | 1 | **VIN** | Input Supply Voltage | | 2 | **GND** | Ground | | 3 | **EN / CE** | Enable / Chip Enable (High = On, Low = Off) | | 4 | **ADJ / FB** | Feedback / Adjust pin for setting output voltage | | 5 | **VOUT** | Regulated Output Voltage | --- ### 4. Circuit Implementation To use the Adjustable version, an external resistor divider is required to set the desired output voltage ($V_{out}$). ```python # Formula for Output Voltage V_out = V_ref * (1 + (R1 / R2)) # Where: # V_ref is usually 1.2V or 0.8V (check datasheet) # R1 is the resistor between VOUT and ADJ # R2 is the resistor between ADJ and GND ``` --- ### 5. Common Applications * **Battery Powered Equipment:** Due to low quiescent current. * **Communication Devices:** Low noise requirements for RF stages. * **Post-regulators:** Used after a switching power supply to provide a clean, stable DC rail.