1.5A SWITCHING REGULATOR The L4963 is a monolithic power switching regulator manufactured by STMicroelectronics (STM). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Output Voltage Range:** Adjustable from **5.1V to 40V**
- **Output Current:** Up to **2.5A** (with proper heat sinking)
- **Input Voltage Range:** **9V to 46V** (with transient capability up to 50V)
- **Switching Frequency:** **100 kHz** (fixed)
- **Efficiency:** Up to **90%**
- **Dropout Voltage:** **1.1V typical**
- **Operating Junction Temperature:** **-40°C to +150°C**
- **Package:** **Multiwatt15** (through-hole)
### **Descriptions:**
- The L4963 is a **step-down (buck) switching regulator** with a **high-efficiency monolithic design**.
- It integrates a **power switch, oscillator, error amplifier, and protection circuits** in a single package.
- Designed for **DC-DC converter applications**, it provides a regulated output with minimal external components.
- Includes **current limiting, thermal shutdown, and soft-start** for protection.
### **Features:**
- **Monolithic design** for simplified circuit implementation
- **Adjustable output voltage** via external resistors
- **Internal current limiting** and **thermal shutdown**
- **Soft-start function** to reduce inrush current
- **Low standby current** (typically **2.5mA**)
- **Pulse-by-pulse current limiting** for overload protection
- **Built-in error amplifier** for precise voltage regulation
This information is based on the manufacturer's datasheet and technical documentation.
