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TPS61021A: Max Input Voltage at VIN=EN

Hirotsugu Kobayashi

Mastermind 9530 points

Part Number: TPS61021A

Hi, team.

Since the maximum rating of EN pin is 3.6 V, when using with VIN = EN, the maximum input voltage is 3.6V?
Can I use it with 3.8Vout/0.8 A at 2.4 to 3.7Vin?

Best Regards,

over 6 years ago

0 Minqiu Xie over 6 years ago

TI__Mastermind 21565 points

Hi Hirotsugu:
Please add the divide resistances or zener to keep the voltage of EN below the maximum rating.
The EN logic high threshold is 0.84V(Max) in datasheet.

0 Helen chen over 6 years ago

TI__Mastermind 40080 points

HI Sir,

Please use a divide resistor to make sure the EN voltage <=3.6V.

0 Hirotsugu Kobayashi over 6 years ago in reply to Minqiu Xie

Mastermind 9530 points

Hi, Minqiu

Since it is a battery application, I do not want to waste current to resistance or zener.
Why is EN 3.6Vmax as input voltage range is 4.4V?

Best Regards,

0 Helen chen over 6 years ago in reply to Hirotsugu Kobayashi

TI__Mastermind 40080 points

Dear Sir,

you can use 100k and 1M ohm resistor for the divider, thus the current consumption on the resistor is not big.