## Technical Overview: 78L08ML-AB3-R The **78L08ML-AB3-R** is a 3-terminal positive fixed voltage regulator. It belongs to the 78Lxx series, which is the low-power (small current) version of the standard 78xx series. This specific part is designed to provide a stable 8V output for electronic circuits. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 8V | | **Output Current** | Up to 100mA | | **Input Voltage (Max)** | 30V | | **Package Type** | SOT-89 (Surface Mount) | | **Operating Temperature** | -40°C to +125°C | | **Quiescent Current** | ~3.0mA to 5.0mA | --- ### 2. Part Number Breakdown Understanding the suffix helps identify the package and manufacturer (typically UTC - Unisonic Technologies): * **78L**: Low-power positive regulator series. * **08**: 8V Output. * **ML**: Often indicates specific tolerance or lead-free enhancements. * **AB3**: Refers to the **SOT-89** package type. * **R**: Denotes Tape & Reel packaging for automated assembly. --- ### 3. Pin Configuration (SOT-89) When looking at the part from the top (leads pointing down): 1. **OUT**: Regulated 8V output. 2. **GND**: Ground (connected to the large heat-sink tab). 3. **IN**: Unregulated input voltage. --- ### 4. Application Circuit To ensure stability and reduce noise, external capacitors are required. ```c Input (V_in) ----[ 78L08 ]---- Output (8V) | [GND] Recommended Capacitors: - Input: 0.33uF Ceramic/Tantalum - Output: 0.1uF Ceramic ``` --- ### 5. Common Uses * **Local on-card regulation:** Eliminating noise problems associated with single-point regulation. * **Voltage logic conversion:** Converting 12V or 24V rails down to 8V for specialized sensors or op-amps. * **Current Limiters:** Can be configured with a resistor to act as a constant current source.