Power Source Selector for Dual-Battery Systems The MAX1773EUP is a step-up DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Maxim Integrated (now Analog Devices)
- **Part Number:** MAX1773EUP
- **Package:** 20-TSSOP (Thin Shrink Small Outline Package)
- **Input Voltage Range:** 0.7V to 5.5V
- **Output Voltage Range:** Adjustable (up to 5.5V)
- **Output Current:** Up to 300mA (depending on input/output conditions)
- **Switching Frequency:** 500kHz (typical)
- **Efficiency:** Up to 90%
- **Operating Temperature Range:** -40°C to +85°C
- **Features:** Low startup voltage, low quiescent current, and automatic pulse-frequency modulation (PFM) for improved efficiency at light loads.
### **Descriptions:**
The MAX1773EUP is a high-efficiency, step-up DC-DC converter designed for low-input-voltage applications. It is optimized for battery-powered systems and can operate from input voltages as low as 0.7V. The device incorporates an internal N-channel MOSFET switch and provides an adjustable output voltage up to 5.5V. The MAX1773EUP is well-suited for applications requiring power from single-cell or dual-cell alkaline/NiMH batteries.
### **Features:**
- **Wide Input Voltage Range:** 0.7V to 5.5V
- **Adjustable Output Voltage:** Up to 5.5V
- **High Efficiency:** Up to 90%
- **Low Startup Voltage:** 0.7V (ensures operation from nearly depleted batteries)
- **Low Quiescent Current:** 19µA (typical)
- **500kHz Switching Frequency:** Allows for small external components
- **Automatic PFM Mode:** Improves efficiency at light loads
- **Internal N-Channel MOSFET Switch:** Simplifies design and reduces external components
- **Thermal Shutdown Protection:** Prevents damage from excessive heat
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions
This information is based solely on the manufacturer's datasheet and technical documentation.
