MIC2594-1YM Micrel Inc, MIC2594-1YM Datasheet - Page 20

• Manufacturer Part Number: MIC2594-1YM
• Description: Negative Voltage Hot-Swap Controller -
• Manufacturer: Micrel Inc
• Type: Hot-Swap Controllerr

Specifications of MIC2594-1YM

• Applications: General Purpose
• Internal Switch(s): No
• Voltage - Supply: -19 V ~ -80 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Family Name: MIC2594
• Package Type: SOIC
• Operating Supply Voltage (min): -19V
• Operating Supply Voltage (max): -80V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.94mm
• Product Height (mm): 1.48mm
• Product Length (mm): 4.93mm
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

/PWRGD Signal Drive Capability
The /PWRGD signal can be used to drive an optoisolator or
an LED. The use of an optoisolator is sometimes needed
to protect I/O signals (e.g., /PWRGD, RESET, ENABLE) of
both the controller and downstream DC-DC converter(s)
from damage caused by common mode transients. Such
September 2005
MIC2588/MIC2594
(Short Pin)
(Long Pin)
-48V RTN
(Long Pin)
-48V RTN
-48V
IN
SMAT70A
100V
*D1
Nominal Undervoltage and Overvoltage Thresholds:
* Optional components (See Applications Information for more details)
# An external pull-up resistor for the power-good signal is necessary for DC-DC supplies
(and all other load modules) not equipped with internal pull-up impedence
V
V
12.4kΩ
UV
OV
698kΩ
C1
1uF
1%
R1
= 36.5V
= 71.2V
1%
R3
43kΩ
R5
Figure 10. Optoisolator Driven by /PWRGD Signal
*C6
0.33uF
11.8 kΩ
*C2
22nF
1%
R2
MOC207-M
1
2
VDD
1
2
3
4
/PWRGD
VEE
6
5
OV
UV
MIC2588-2BM
R
0.01Ω
SENSE
5%
SENSE
DRAIN
GATE
VDD
20
8
7
6
5
is the case when an EMI filter is utilized to prevent DC-DC
converter switching noise from being injected back onto the
power supply. The circuit of Figure 10 shows how to con-
figure an optoisolator driven by the /PWRGD signal of the
MIC2588 controller.
C3
0.22uF
10Ω
SUM110N10-09
R4
M1
R
15kΩ
FDBK
100uF
C
6.8nF
100V
C5
FDBK
0.1uF
C4
-48V RTN
-48V
OUT
ON/OFF
IN+
IN-
CONVERTER
DC-DC
#
OUT+
OUT-
+2.5V RTN
+2.5V
OUT
M9999-083005
Micrel