Micrel
MIC2589/MIC2595
Typical Applications
-48V RTN
(Long Pin)
-48V RTN
MIC2589-2BM
*D1
SMAT70A
1
2
3
4
5
6
7
14
13
12
11
10
9
/PWRGD1
VDD
/PWRGD3
/PWRGD2
DRAIN
IN+
OUT+
+5VOUT
R1
689k
1%
R2
11.8k
1%
C4
100µF
CTIMER
0.068µF
C3
0.1µF
ON/OFF*
PGTIMER
UV
-48V RTN
(Short Pin)
IN–
IN+
OUT–
+5V RTN
OV
CFILTER
2.2µF
C1
0.47µF
OUT+
+2.5VOUT
CFILTER
CNLD
VEE
GATE
C6
100µF
C5
0.1µF
ON/OFF*
R3
12.4k
1%
SENSE
N/C
CNLD
0.068µF
IN–
OUT–
+2.5V RTN
*C2
8
0.1µF
R4
10
IN+
OUT+
+1.8VOUT
C8
100µF
C7
0.1µF
ON/OFF*
IN– OUT–
-48V RTN
(Long Pin)
+1.8V RTN
RSENSE
0.01
5%
M1
SUM110N10-09
Nominal Undervoltage and Overvoltage Thresholds:
UV=36.5V
V
VOV=71.2V
Overcurrent TImer Delay
~
tFLT=30ms
*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
2
M9999-120505
(408) 955-1690
December 2005
MICREL [ MICREL SEMICONDUCTOR ]
