The **ADP3309ARTZ-3.6-R7** is a high-precision, low dropout (LDO) linear voltage regulator. It belongs to the anyCAP® family from Analog Devices, designed to be stable even with small, low-cost multilayer ceramic capacitors. --- ## 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Output Voltage** | 3.6V (Fixed) | | **Input Voltage Range** | 2.8V to 12V | | **Output Current** | 100 mA | | **Dropout Voltage** | 120 mV (Typical at 100 mA) | | **Accuracy** | ±0.8% at room temperature | | **Package Type** | SOT-23-5 (Surface Mount) | | **Operating Temperature** | -40°C to +85°C | --- ## 2. Pin Configuration (SOT-23-5) The device typically follows a standard 5-pin layout: 1. **IN (Input):** Power source for the regulator. 2. **GND (Ground):** Common reference point. 3. **SD (Shutdown):** Logic input. Pulling this low puts the device in sleep mode ($< 1 \mu A$ current). 4. **ERR (Error Flag):** Open-collector output that goes low if the output falls out of regulation. 5. **OUT (Output):** Regulated 3.6V DC output. --- ## 3. Core Features and Benefits ### anyCAP® Technology Traditional LDOs require large tantalum capacitors with specific ESR (Equivalent Series Resistance) to remain stable. The ADP3309 is stable with **any type of capacitor**, including Ceramic (MLCC), which saves board space and cost. ### High Accuracy The device offers an ultralow tolerance (±0.8% room temp / ±1.4% over temp), making it ideal for sensitive RF and precision measurement circuits. ### Thermal & Current Protection It includes built-in internal current limiting and thermal overload protection to prevent the device from burning out during a fault condition. --- ## 4. Typical Applications * **Cellular Handsets:** Powering internal logic or RF stages. * **Battery-Powered Systems:** Due to the low quiescent current and shutdown mode. * **PCMCIA Cards:** Small form factor for portable computing. * **Instrumentations:** Precision sensors requiring stable 3.6V rails. --- ## 5. Part Number Breakdown * **ADP3309:** Model Series. * **ARTZ:** Package code (SOT-23) and RoHS compliance. * **3.6:** Fixed Output Voltage (3.6 Volts). * **R7:** 7-inch Tape and Reel packaging (3,000 units).