MIC2544/2548
Micrel
Functional Characteristics
V
OUT
V
FLG
V
EN
(2V/div.) (5V/div.) (10V/div.)
V
FLG
V
EN
(10V/div.) (5V/div.)
Turn-On Response
Turnoff Response
V
OUT
(2V/div.)
V
IN
= 5V
C
IN
= 4.7µF
C
L
= 1µF
R
L
= 10Ω
I
OUT
(200mA/div.)
V
IN
= 5V
C
IN
= 4.7µF
C
L
= 1µF
R
L
= 10Ω
MIC2544-1
TIME (500µs/div.)
I
OUT
(200mA/div.)
MIC2544-1
TIME (1ms/div.)
Current-Limit Response
V
OUT
V
FLG
V
EN
(5V/div.) (10V/div.) (10V/div.)
V
OUT
V
FLG
V
EN
(5V/div.) (10V/div.) (10V/div.)
Enable Into Heavy Load
Thermal Shutdown
V
IN
= 5V
C
IN
= 4.7µF
I
SET
= 1A
R
L
= 1Ω
I
OUT
(500mA/div.)
I
OUT
(500mA/div.)
V
IN
= 5V
C
IN
= 4.7µF
R
L
= 1Ω
I
SET
= 1A
MIC2544-1
TIME (100ms/div.)
MIC2544-1
TIME (100ms/div.)
Enable Into Heavy Load
V
FLG
V
EN
(5V/div.) (10V/div.)
Inrush Current Response
V
FLG
V
EN
(5V/div.) (10V/div.)
V
IN
= 5V
C
IN
= 4.7µF
R
L
= 1Ω
I
SET
= 1A
Reset
V
OUT
(5V/div.)
V
IN
= 5V
C
IN
= 4.7µF
R
L
= 10Ω
C
L
= 110µF
Output Latched
I
OUT
(500mA/div.)
Thermal Shutdown
I
OUT
(1A/div.)
C
L
= 60µF
C
L
= 10µF
MIC2544-1
MIC2548-1
TIME (500µs/div.)
TIME (500µs/div.)
MIC2544/2548
8
June 2000
MICREL [ MICREL SEMICONDUCTOR ]
