Professional IC Distribution & Technical Solutions

The MAX857ESA+T is a step-up DC-DC converter manufactured by Maxim Integrated (now part of Analog Devices).

Specifications:

• Input Voltage Range: 0.7V to 5.5V
• Output Voltage: Adjustable from 2V to 5.5V
• Output Current: Up to 300mA (depending on input/output conditions)
• Switching Frequency: 500kHz
• Efficiency: Up to 90%
• Operating Temperature Range: -40°C to +85°C
• Package: 8-pin SOIC (Small Outline Integrated Circuit)
• Shutdown Current: <1µA

Descriptions:

The MAX857ESA+T is a low-power, step-up DC-DC converter designed for battery-powered applications. It features an internal N-channel MOSFET switch and requires minimal external components. The device is optimized for low-input-voltage operation, making it suitable for single-cell or dual-cell battery systems.

Features:

• Low Start-Up Voltage: Operates down to 0.7V
• Adjustable Output Voltage (via external resistors)
• Internal MOSFET Switch (reduces external component count)
• Low Quiescent Current: 25µA (typical)
• Pulse-Skipping Mode for improved efficiency at light loads
• Thermal Shutdown Protection
• Undervoltage Lockout (UVLO)

This device is commonly used in portable electronics, such as wireless sensors, medical devices, and handheld instruments.

(Source: Maxim Integrated datasheet)