42V, 750mA Step-Down Regulator with 2.5渭A Quiescent Current and Integrated Diodes The LT3973EMSE-3.3#PBF is a step-down switching regulator manufactured by Linear Technology (now part of Analog Devices). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Linear Technology (Analog Devices)
- **Part Number:** LT3973EMSE-3.3#PBF
- **Type:** Step-Down (Buck) Switching Regulator
- **Output Voltage:** Fixed 3.3V
- **Input Voltage Range:** 4V to 42V
- **Output Current:** Up to 3A
- **Switching Frequency:** 200kHz to 2MHz (adjustable)
- **Efficiency:** Up to 95%
- **Operating Temperature Range:** -40°C to +125°C
- **Package:** MSOP-16 (Exposed Pad)
- **Protection Features:** Overcurrent, Overtemperature, and Reverse-Battery Protection
### **Descriptions:**
- The LT3973 is a high-efficiency, monolithic buck switching regulator with a wide input voltage range.
- It features a low dropout (LDO) mode for improved efficiency at low input-output differentials.
- The device includes an internal power switch, oscillator, control circuitry, and protection features in a compact MSOP-16 package.
- It is designed for applications requiring high power density and efficiency, such as automotive, industrial, and telecom systems.
### **Features:**
- **Wide Input Voltage Range (4V to 42V)** – Suitable for automotive and industrial applications.
- **High Efficiency (Up to 95%)** – Minimizes power loss and heat dissipation.
- **Adjustable Switching Frequency (200kHz to 2MHz)** – Allows optimization for efficiency or component size.
- **Low Dropout Operation** – Maintains regulation even when the input voltage is close to the output.
- **Integrated Power Switch** – Simplifies design and reduces external component count.
- **Protection Features:**
- Overcurrent protection
- Overtemperature shutdown
- Reverse-battery protection
- **Compact MSOP-16 Package** – Space-saving and thermally efficient.
This information is based solely on the manufacturer's datasheet and technical documentation.
