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Low noise power supply for handheld instruments

Overview

Low noise power supply for handheld instruments

author	date
CNPP	2020-03-26

Overview

A power module composed of TI's positive and negative voltage dual-output DC-DC chip TPS65131 and low-voltage dropout regulators TPS7A49 and TPS7A30 with polar noise is very suitable for providing low-noise positive and negative voltages to analog chips when powered by lithium batteries or USB. Dual power supply, and output current up to 100mA. At the same time, it can also provide positive and negative voltage power output with current up to 1000mA, which is very suitable for powering portable devices such as handheld instruments.

Design Parameters

project	parameter
Module input voltage	3.3V to 5.5V
Positive power output voltage	6.0V or 10.5V
Positive power output current	1000mA max
Negative power output voltage	-6.0V or -10.0V
Negative power output current	1000mA max
Positive low noise output voltage	9.0V or 5.0V
Positive low noise output current	150mA max
Negative low noise output voltage	-9.0V or -5.0V
Negative low noise output current	200mA max

(The voltage output settings of each channel are selected through jumpers, see the schematic diagram for details)

Design Files

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Update:2025-06-27 17:24:51

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