![](http://datasheet.mmic.net.cn/Micrel-Inc/MIC2070-2PCQS-TR_datasheet_98992/MIC2070-2PCQS-TR_9.png)
January 2005
9
M9999-101104
MIC2010/2070
Micrel
Functional Characteristics
VMAIN = VAUX = 5V
CL = 100F
RL = 10
AUX Start-up by UVLO
TIME (500s/div)
V
AU
X
(2V/div)
FA
U
LT
(2V/div)
V
OUT
(2V/div)
I OUT
(50mA/div)
V
AUX ramps from 0V to 5V
V
MAIN = S3# = 0V
EN = [ON]
R
LOAD = 50
C
LOAD = 1F
VMAIN = VAUX = 5V
CL = 100F
RL = 10
AUX Shutdown by UVLO
TIME (10ms/div)
2.96V
V
AUX ramps from 5V to 0V
V
MAIN = S3# = 0V
EN = [ON]
R
LOAD = 50
C
LOAD = 1F
V
AU
X
(2V/div)
FA
U
LT
(2V/div)
V
OUT
(2V/div)
I OUT
(50mA/div)
Main Start-up by UVLO
TIME (500s/div)
3.20V
V
MAIN
(2V/div)
FA
U
LT
(2V/div)
V
OUT
(2V/div)
I OUT
(200mA/div)
V
MAIN = VAUX;VMAIN & VAUX ramp from 0V to 5V
S3# = 5V
EN = [ON]
R
LOAD = 10
C
LOAD = 1F
S3# = 5V
EN = [ON]
R
LOAD = 10‰
C
LOAD = 1 F
V
MAIN = VAUX;VMAIN & VAUX ramp from 5V to 0V
V
MAIN
(2V/div)
F
AUL
T
(2V/div)
V
OUT
(2V/div)
I OUT
(200mA/div)
Main Shut-down by UVLO
TIME (10ms/div)
2.96V
Main Turn-On Response
TIME (250s/div)
V
MAIN = VAUX =5V
S3# = 5V
EN toggles from [OFF] to [ON]
R
LOAD = 10
C
LOAD = 1F
EN
(5V/div)
FA
U
LT
(5V/div)
V
OUT
(2V/div)
I OUT
(200mA/div)
Main Turn-Off Response
TIME (100s/div)
V
MAIN = VAUX =5V
S3# = 5V
EN toggles from [ON] to [OFF]
R
LOAD = 10
C
LOAD = 1F
EN
(5V/div)
FA
U
LT
(5V/div)
V
OUT
(5V/div)
I OUT
(200mA/div)