component recomendation for converting analog sequencer into MCU based - Page 1
Forum section: electronics / general

author: john23
author_rank: Frequent Contributor
timestamp: April 12, 2024, 03:45:03 pm
content: Hello ,I got this good QORVO manual shown below it uses a combination of regulators and a comporator.all the component there are analogLT1716 -analog comparatorLTC1261LCS8-4 - negative generatorLT1761-BYP- analog regulatorCould you reccomend me names of similar components which could do the same method using a microcontroller?Thanks.https://www.qorvo.com/products/d/da007774

author: eutectique
author_rank: Frequent Contributor
timestamp: April 12, 2024, 04:02:09 pm
content: Quote from: john23 on April 12, 2024, 03:45:03 pmIf you knowwhat and whyyou are doing, the thing you areprobablylooking for is aPower Management Integrated Circuit. There are obviously other brands apart from NXP.

author: john23
author_rank: Frequent Contributor
timestamp: April 12, 2024, 05:05:00 pm
content: Hello eutectique,Could you please help me with a name of programmable voltage regulator i could use instead ?Thanks.

author: eutectique
author_rank: Frequent Contributor
timestamp: April 12, 2024, 05:27:38 pm
content: You can chose whatever suits your requirements here:https://www.qorvo.com/products/power-solutions/modular-pmicshttps://www.nxp.com/products/power-management/pmics-and-sbcs/pmicshttps://www.analog.com/en/product-category/pmic-multifunction.htmlhttps://www.st.com/en/power-management/multi-output-controllers-and-regulators.htmlhttps://www.ti.com/power-management/multi-channel-ics-pmic/overview.htmlhttps://www.renesas.com/us/en/products/power-management/multi-channel-power-management-ics-pmicshttps://www.infineon.com/cms/en/product/power/power-management-ics-pmic-system-basis-chips-sbc/power-management-ics-pmic/https://www.microchip.com/en-us/products/power-management/pmic-power-management-ics

author: john23
author_rank: Frequent Contributor
timestamp: April 12, 2024, 07:34:55 pm
content: Hello eutectique, Regarding the LTC1261LCS8 (datasheet link shown below)In order to stick with the QORVO manual can I Turn on and off the voltage regulator with a MCU using SHDN pin ?I want to use ESP8266 which is 3.3V GPIO.Suppose i want to turn this device on so i send GPIO pin into logical 1 which is "3.3"However the device working when the SHDN is floating.How do i connect the GPIO pin to the LTC1261L so i could turn it ON and OFF with GPIO pin?Could you make some visual schematics so i'll the method of doing that? (if its possible)Thanks.Thanks.https://www.analog.com/en/products/ltc1261.html

author: eutectique
author_rank: Frequent Contributor
timestamp: April 12, 2024, 10:30:39 pm
content: You can drive this pin from your MCU directly.Page 5 of the datasheet, section PIN FUNCTIONS, reads literally:SHDN (Pin 8 ): Shutdown.When this pin is at ground the LTC1261L operates normally.An internal 5μA pull-down keeps SHDN low if it is left floating.When SHDN is pulled high, the LTC1261L enters shutdown mode.In shutdown, the charge pump is disabled, the output collapses to 0V and the quiescent current drops to 5μA typically.

author: john23
author_rank: Frequent Contributor
timestamp: April 13, 2024, 04:09:35 am
content: Hello eutectique,So if i put GPIO '0' which is 0 volts to the SHDN pin why does it means that the SHDN pin will be connected to GND?COuld you please make some drawing so i'll understand the logic?Thanks.

author: eutectique
author_rank: Frequent Contributor
timestamp: April 13, 2024, 09:15:44 am
content: This means that the SHDN pin will be at ground potential, more or less. The voltages considered as high and low for SHDN pin are specified in the table ELECTRICAL CHARACTERISTICS on page 3.You are seriously lacking the basic knowledge of electronics.