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MB39C031 Datasheet(PDF) 21 Page - Cypress Semiconductor

Part # MB39C031
Description  2ch Buck DC/DC Converter 1ch LDO with I2C Interface and SW FET
PDF  69 Pages
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

MB39C031 Datasheet(HTML) 21 Page - Cypress Semiconductor

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Document Number: 002-08407 Rev. *B
Page 21 of 69
MB39C031
13.
CTL* Turning On and Off Sequence 2(VCC→CTLMAIN→CTL1→CTL2)
VCC
VR
osc (IC internal signal)
3.6V
0.6V
85%
DD1
PG1
CTLMAIN
ctl1 (IC internal signal)
VCCI2C
85%
DD2
PG2
0V
Soft-start time
uvlo_vcc
(IC internal signal)
VREF
2.4V
Discharge
Discharge
90%
CTL1
CTL2
ctl2 (IC internal signal)
Soft-start time
(1)
(2)
(1)
Time from turning on CTLMAIN to VREF activation completion (=communication enabled)*
Typ: 130
μs, Max: 200 μs
(2)
Time from turning on CTL1 to ctll (IC internal signal) "H"
Typ: 150
μs, Max: 250 μs
*: VREF and VR activations depend on the VREF pin capacitance and VR pin capacitance.
Time in the sequence figure above is applied for the following condition.
 VREF pin capacitance : 0.1
μF
 VR pin capacitance : 0.47
μF



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