Multiple Output Power Source – Dual 10V (+/-10V), 5V DC, 3.3V DC from 9V Battery 

This is a multiple output power converter module that provides +/-10V (Dual 10V), 5V DC, and 3.3V DC from a 9V PP3 battery. This is a very useful project that has been designed for low-load current applications. Dual +/-10V output from a 9V battery is a key feature of the project. The battery holder can be mounted on the backside of the PCB. An onboard slide switch provides power ON/OFF. Onboard LED indicates the power. LM1117-5V chip provides 5V DC output from 9V Battery, further, an LM1117-3.3V regulator is provided to step down the 5V to 3.3V DC. MAX680 charge pump chip provides +/-10V from 5V.

The MAX680 is a monolithic, CMOS, dual charge-pump voltage converter that provides ±10V outputs from a +5V input voltage. The MAX680 provides both a positive step-up charge pump to develop +10V from +5V input and an inverting charge pump to generate the -10V output. This chip has an on-chip, 8kHz oscillator. The output source impedances are typically 150Ω, providing useful output currents up to 10mA. The low quiescent current and high efficiency make this device suitable for a variety of applications that need both positive and negative voltages generated from a single supply.

Features

• Output +/-10V Load Up to 10mA, 5V DC Load Up to 150mA, 3.3V Load Up to 150mA
• Input Supply 9V Battery (Alkaline Battery is preferable)
• On Board ON/OFF Slide Switch
• On Board Power LED
• Header Connectors for Easy Connection
• On Board Battery Holder
• Very Compact Design
• PCB Dimensions 56.04 x 31.59 mm

Schematic

Parts List

Connections

Gerber View

Photos

Video

MAX680 Datasheet

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