Micrel
MIC2589/MIC2595
Typical Applications
-48V RTN
(Long Pin)
*D1
SMAT70A
MIC2589-2BM
VDD
/PWRGD1
PGTIMER
UV
OV
CFILTER
CNLD
VEE
/PWRGD3
/PWRGD2
DRAIN
GATE
SENSE
N/C
-48V RTN
1
14
-48V RTN
(Short Pin)
R1
689k
1%
R2
11.8k
1%
C
TIMER
0.068µF
2
13
C4
100µF
IN+
C3
0.1µF
OUT+
+5V
OUT
ON/OFF*
IN–
OUT–
+5V RTN
3
12
4
11
C1
0.47µF
R3
12.4k
1%
C
FILTER
2.2µF
5
10
IN+
C6
100µF
*C2
0.1µF
R4
10
C8
100µF
C7
0.1µF
C5
0.1µF
OUT+
+2.5V
OUT
6
9
ON/OFF*
IN–
OUT–
+2.5V RTN
C
NLD
0.068µF
7
8
IN+
OUT+
+1.8V
OUT
ON/OFF*
IN–
OUT–
+1.8V RTN
-48V RTN
(Long Pin)
Nominal Undervoltage and Overvoltage Thresholds:
V
UV
=36.5V
V
OV
=71.2V
Overcurrent TImer Delay
=30ms
t
FLT
~
*Optional components (See Funtional Description and Applications Information for more details)
#An external pull-up resistor for the power-good signal is necessary for DC-DC convertors (and all other load modules) not equipped with an
internal pull-up impedance
R
SENSE
0.01
5%
M1
SUM110N10-09
December 2005
2
M9999-120505
(408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
