MIC2584/2585
Micrel
Turn-On Response (Hot Insert)
V
CC1
= 5V
V
CC2
= 3.3V
C
L
= 250µF
R
L
= 5Ω
Power-On Reset Response
FAULT
5V/div
VCC1
2V/div
V
OUT1
2V/div
ON
5V/div
I
IN1
V
OUT1
500mA/div 2V/div
22.5ms
/POR PG1
2V/div 2V/div
V
CC1 =
5V
V
CC2 =
3.3V
R
L1
=3.5Ω
C
L1
= 220µF
C
POR
= 47nF
TIME (5ms/div.)
TIME (5ms/div.)
Short-Circuit Crowbar Channel 1
(SCR enabled through a PNP from DIS pin-MIC2585-1BTS)
FAULT V
OUT1
5V/div 5V/div
Short-Circuit Crowbar Channel 2
(SCR enabled through a PNP from DIS pin-MIC2585-1BTS)
/FAULT V
OUT2
5V/div 2V/div
4.5A peak
V
CC1
= 5V
V
CC2
= 3.3V
R
L1
= 3.5Ω
R
L2
= 1Ω
C
L1
= C
L2
= 220µF
3.88A peak
V
CC1
= 5V
V
CC2
= 3.3V
R
L1
= 3.5Ω
R
L2
= 1Ω
C
L1
= C
L2
= 220µF
I
IN1
1A/div
TIME (25µs/div.)
I
IN2
1A/div
TIME (10µs/div.)
Short-Circuit Response
V
CC1 =
5V
V
CC2 =
3.3V
R
L1
= 1Ω
R
L2
= open
C
L1
= 2200µF
C
L2
= 220µF
FAULT V
GATE1
V
OUT1
10V/div 10V/div 2V/div
6.04A peak
I
IN1
2A/div
TIME (25µs/div.)
March 2005
13
MIC2584/2585
MICREL [ MICREL SEMICONDUCTOR ]
