2ch Step-down DC/DC Controller ICs The **XC9503B093AR** is a **3.3V LDO (Low Dropout) regulator** manufactured by **TOREX**. Below are the key specifications, descriptions, and features based on available information:
### **Specifications:**
- **Output Voltage:** 0.9V (fixed)
- **Output Current:** 300mA
- **Input Voltage Range:** 1.5V to 5.5V
- **Dropout Voltage:** 130mV (typical at 150mA load)
- **Line Regulation:** ±0.05%/V (typical)
- **Load Regulation:** ±0.3%/mA (typical)
- **Quiescent Current:** 35µA (typical)
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SOT-89 (3-pin)
### **Descriptions:**
- The **XC9503B093AR** is a **low-power CMOS LDO regulator** designed for stable voltage supply in portable and battery-powered applications.
- It features **low dropout voltage** and **low quiescent current**, making it suitable for power-sensitive devices.
- The regulator includes built-in **overcurrent protection** and **thermal shutdown** for safety.
### **Features:**
- **Low Dropout Voltage:** Ensures efficient operation even with small input-output differentials.
- **Low Quiescent Current:** Extends battery life in portable applications.
- **High Ripple Rejection:** Reduces noise in the output voltage.
- **Compact Package:** SOT-89 package saves board space.
- **Stable with Low-ESR Capacitors:** Works with ceramic capacitors (≥1µF).
- **Protection Circuits:** Includes overcurrent and thermal shutdown protection.
This information is based on TOREX's official documentation for the **XC9503B093AR** LDO regulator. For detailed electrical characteristics, refer to the datasheet.
