The **US1528XG-S08-R** is a specific integrated circuit produced by Unisonic Technologies Co., Ltd (UTC). It is primarily categorized as a **Low Dropout (LDO) Voltage Regulator** designed for high-performance power management. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the US1528XG-S08-R: | Parameter | Specification | | :--- | :--- | | **Component Type** | CMOS Low Dropout (LDO) Regulator | | **Input Voltage Range** | 2.5V to 6.0V | | **Output Current** | 300mA to 500mA (load dependent) | | **Dropout Voltage** | Extremely low (typically < 200mV @ full load) | | **Package Type** | SOP-8 (Standard 8-pin Small Outline Package) | | **Operating Temperature** | -40°C to +85°C | | **RoHS Status** | Lead-free / Halogen-free (denoted by -R) | --- ### 2. Functional Features The US1528 series is designed for applications where efficiency and space are critical. Its core features include: * **High PSRR:** Excellent Power Supply Rejection Ratio, making it suitable for noise-sensitive RF circuits. * **Low Quiescent Current:** Minimizes power consumption during standby, extending battery life in portable devices. * **Built-in Protections:** * *Thermal Shutdown:* Prevents the chip from burning out under heavy load. * *Current Limiting:* Protects the IC and the circuit during short-circuits. * **Enable/Shutdown Pin:** Allows the system to turn the regulator off electronically. --- ### 3. Pin Configuration (SOP-8) In the SOP-8 package, the pins are generally assigned as follows (typical for this series): 1. **VIN:** Input Voltage 2. **GND:** Ground 3. **EN:** Enable (High = On, Low = Off) 4. **NC/SET:** No connection or Output Voltage Adjustment 5. **VOUT:** Regulated Output Voltage 6. **FB/ADJ:** Feedback pin (for adjustable versions) 7. **NC:** No Internal Connection 8. **NC:** No Internal Connection --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying variants: * **US1528:** Series base number. * **XG:** Specific internal revision or output voltage coding. * **S08:** Indicates the **SOP-8** package type. * **R:** Indicates **Tape and Reel** packaging for automated assembly. --- ### 5. Common Applications * Battery-powered portable equipment (Smartphones, Tablets). * Wireless LAN (WLAN) cards and RF modules. * Low voltage microcontrollers and DSP power supplies.