4.75 to 28 V,power-source selector for dual-battery system The **MAX1538ETI** is a power management IC manufactured by **Maxim Integrated** (now part of Analog Devices). Below are its key specifications, descriptions, and features based on factual data:
### **Specifications:**
- **Manufacturer:** Maxim Integrated
- **Package:** 28-pin TQFN (Thin Quad Flat No-Lead)
- **Operating Temperature Range:** -40°C to +85°C
- **Input Voltage Range:** 4.5V to 28V
- **Output Voltage Range:** Adjustable (supports multiple outputs)
- **Switching Frequency:** Up to 1MHz
- **Number of Outputs:** Dual (buck + boost or other configurations)
- **Control Method:** PWM (Pulse-Width Modulation)
### **Description:**
The **MAX1538ETI** is a **high-efficiency, dual-output power-supply controller** designed for applications requiring flexible power management. It integrates a **buck controller** and a **boost controller**, allowing it to generate multiple regulated voltages from a single input source. It is commonly used in **portable devices, industrial systems, and embedded applications**.
### **Features:**
- **Dual-Output Power Management:** Combines a **step-down (buck) and step-up (boost) regulator** in a single IC.
- **Wide Input Voltage Range (4.5V to 28V):** Suitable for various power sources, including batteries and adapters.
- **High Efficiency:** Uses synchronous rectification for improved power conversion.
- **Programmable Switching Frequency (up to 1MHz):** Allows optimization for efficiency and component size.
- **Adjustable Output Voltages:** Supports external resistor dividers for custom voltage settings.
- **Soft-Start Function:** Prevents inrush current during startup.
- **Overcurrent and Thermal Protection:** Enhances system reliability.
- **Compact TQFN Package:** Space-saving design for compact PCB layouts.
This information is strictly based on the manufacturer's datasheet and technical documentation.
