Author Topic: GM120041 (LT1963 clone?)  (Read 1168 times)

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Offline ParoidiaTopic starter

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GM120041 (LT1963 clone?)
« on: February 13, 2024, 10:34:03 pm »
So I need a very low dropout LDO for a servo breakout PCB intended to power servos off a 7.4v or less battery (7.4v lipo / li-ion or 6V NiMH depending on whether standard servos or HV servos are connected) while providing direct battery power to the servos and 5v to a multirotor flight controller that is providing the servo control signals (PWM throttle signals are the same thing as PWM servo position control signals) and possibly a 5V receiver. I've been using a TPS76801 for this but it's annoying to order things with that chip from JLCPCB because they don't normally have it in stock and I have to pre order it to my parts library.

 The switching regulator on an FC will typically start having trouble below 6V which is why I power it with a 5V LDO connected to the 5V rail on the FC.

I found this on LCSC, https://www.lcsc.com/product-detail/Linear-Voltage-Regulators-LDO_GONGMOSEMI-GM12041ARDZ-R7_C7463178.html

This is cheaper than the TPS76801 I've been using and JLCPCB has it in stock regularly Pinout is the same as an Analog devices LT1963 except the dropout voltage stated by the datasheet is much lower. Even if they are fudging I could derate it to 1A and still get about the same dropout assuming the dropout is similar to the analog devices chip.

 Anyone heard any bad things about this company's stuff?

 (attached circuit and PCB, pretty much just dropped the new regulator into the existing design and reworked the PCB a little)

 EDIT in case anyone is wondering what D1 is for it's because the FC is plugged into USB to configure it which also powers the 5V rail
« Last Edit: February 13, 2024, 10:46:26 pm by Paroidia »
 


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