MIC2594-1BM TR Micrel Inc, MIC2594-1BM TR Datasheet - Page 13

• Manufacturer Part Number: MIC2594-1BM TR
• Description: IC CTRLR HOT SWAP NEG HV 8-SOIC
• Manufacturer: Micrel Inc
• Type: Hot-Swap Controllerr

Specifications of MIC2594-1BM TR

• 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: Contains lead / RoHS non-compliant
• Other names: MIC2594-1BMTR; MIC2594-1BMTR

MIC2588/MIC2594
the OFF pin falls below its V
turns off due to a fault. Should either event occur, the GATE
pin is immediately pulled low and will remain low until the
ON pin once again exceeds its V
turn-on and turn-off points are set using the resistor divider
R1, R2, and R3 as shown in the “Typical Application.” The
equations to establish the trip points are shown below. In the
following example, the circuit’s nominal ON threshold is set to
V
V
Given V
two resistor values can be readily found. A suggested value
for R3 is that which will provide a minimum of 100µA of cur-
rent through the voltage divider chain at V
yields the following as a starting point:
The closest standard 1% value for R3 = 12.4kΩ.
solving for R2 and R1 yields:
M9999-083005
ON
OFF
= 40V and the circuit’s nominal OFF threshold is
= 35V.
V
V
R3 =
OFF
ON
OFF
, V
= V
V
= V
OFFL
ON
100 A
ONH
OFFL
, and any one resistor value, the remaining

(typ)
(typ)
(typ)


12.23k


R1 R2 R3
OFFL

R1 R2 R3


R2 R3
R3

ONH

threshold value, or the part



threshold. The circuit’s



DD
= V
OFF
. This
13
The closest standard 1% value for R2 = 1.78kΩ.
The closest standard 1% value for R1 = 392kΩ.
Using standard 1% resistor values, the circuit’s nominal
ON and OFF thresholds are:
Good general engineering design practices must consider
the tolerances associated with these parameters, including
but not limited to, power supply tolerance, undervoltgae
and overvoltage tolerances, and the tolerances of the
external passive components.
V
V
ON
OFF
R2 = R3
R2 = 12.4k
R2 = 1.771k
R1= R3
R1= 12.4k
R1= 391.380k
= 40.1V
= 35V







 
 
V




ON
V
V
OFF
1.223V
ON





40V – 1.223V



–1.223V
35V
40V



1.223V
– 1







– 1




– R2

– 1.78kΩ
September 2005
Micrel