MB39C007 Datasheet, PDF (18/52 Pages) Fujitsu Component Limited. – 2 ch DC/DC Converter IC Built-in Switching FET & voltage detection function, PFM/PWM Synchronous Rectification, and Down Conversion Support

MB39C007
[5] XPOR threshold voltage setting [VPORH, VPORL]
Set the detection voltage by applying voltage to the VDET pin via an external resistor calculated according to
this formula.
VPORH =
VPORL =
R3 + R4
R4
R3 + R4
R4
× VTHHPR
× VTHLPR
VTHHPR = 0.600 V
VTHLPR = 0.583 V
Example for setting detection voltage to 3.7 V
R3 = 510 kΩ
R4 = 100 kΩ
510 kΩ + 100 kΩ
VPORH =
× 0.600 = 3.66 =: 3.7 [V]
100 kΩ
510 kΩ + 100 kΩ
VPORL =
× 0.583 = 3.56 =: 3.6 [V]
100 kΩ
VIN
MB39C007
AVDD
R3
VDET
R4
XPOR
1 MΩ
XPOR
18
DS04-27246-2E