MIC2545A/2549A
Micrel
Functional Characteristics
V
OUT
V
FLG
V
EN
(2V/div.) (10V/div.) (10V/div.)
Turn-On Response
V
FLG
V
EN
(10V/div.) (10V/div.)
Turn-Off Response
V
IN
= 5V
C
L
= 100 F
R
L
= 10‰
V
OUT
(2V/div.)
500mA
I
OUT
(200mA/div.)
I
OUT
(200mA/div.)
V
IN
= 5V
C
L
= 100µF
R
L
= 10Ω
MIC2545A-1
TIME (500µs/div.)
500mA
MIC2545A-1
TIME (1ms/div.)
V
FLG
V
EN
(10V/div.) (10V/div.)
Load Removed
Thermal Shutdown
Current-Limit Threshold 1.12A (I
TH
)
I
SET
= 1A
C = 5V
R
L
= 1Ω
V
FLG
V
EN
(10V/div.) (10V/div.)
Current-Limit Response
Short-Circuit Response
Short Circuit
V
OUT
(5V/div.)
V
OUT
(5V/div.)
I
OUT
(500mA/div.)
I
OUT
(500mA/div.)
Current-Limit Threshold 1.12A
Short-Circuit Current
820mA (I
SHORT
)
Thermal
Shutdown
MIC2545A-1
V
IN
= 5V
MIC2545A-1
TIME (100ms/div.)
TIME (100ms/div.)
Enable Into Short Circuit
V
FLG
V
EN
(10V/div.) (10V/div.)
V
FLG
V
EN
(10V/div.) (10V/div.)
Inrush Current Response
V
OUT
(5V/div.)
V
IN
= 5V
R
L
= 10Ω
C
L
= 490µF
C
L
= 130µF
I
OUT
(500mA/div.)
I
OUT
(500mA/div.)
Thermal
Shutdown
Short-Circuit Current
820mA
V
IN
= 5V
R
SET
= 240Ω
C
L
= 10µF
MIC2545A-1
TIME (500µs/div.)
MIC2545A-1
TIME (100ms/div.)
April 2004
9
M9999-041204
MICREL [ MICREL SEMICONDUCTOR ]
