MIC2005-0.5LYM5 TR Micrel Inc, MIC2005-0.5LYM5 TR Datasheet - Page 23

• Manufacturer Part Number: MIC2005-0.5LYM5 TR
• Description: Fixed Current Limit Single High-Side Switch + Flag + Cslew, Active Low- 0.5A -
• Manufacturer: Micrel Inc
• Type: High Side Switchr

Specifications of MIC2005-0.5LYM5 TR

• Number Of Outputs: 1
• Rds (on): 100 mOhm
• Internal Switch(s): Yes
• Current Limit: 500mA
• Voltage - Input: 2.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-3397-2

August 2011
Application Information
Setting I
The MIC2009/2019’s current limit is user programmable
and controlled by a resistor connected between the
I
determined by the following equation:
or
For example: Set I
Looking in the Electrical specifications we will find CLF
at I
For the sake of this example, we will say the typical
value of CLF at an I
equation above:
Designers should be aware that variations in the
measured I
because of small differences between individual ICs
(inherent in silicon processing) resulting in a spread of
I
value of CLF to calculate R
I
values of CLF and the calculated value of R
LIMIT
LIMIT
LIMIT
Micrel, Inc.
LIMIT
’s spread by using the minimum and maximum
values. In the example above we used the typical
Min
190
pin and GND. The value of this resistor is
= 1A.
LIMIT
R
I
R
(the closest standard 1% value)
R
I
I
LIMIT
LIMIT
LIMIT_MIN
LIMIT_MAX
SET
SET
SET
Table 1. CLF at I
= 196Ω
(
=
=
for a given R
Ω
CurrentLim
CurrentLim
)
Typ
243
LIMIT
=
=
=
OUT
1.25A
190V
196
243V
196Ω
293V
= 1.25A
of 1A is 243V. Applying the
Ω
I
LIMIT
R
=
=
=
itFactor(C
itFactor(C
SET
194
. 0
SET
LIMIT
1.5A
(A)
SET
97
Max
293
. We can determine
4 .
= 1A
A
resistor, will occur
Ω
LF)
LF)
SET
Units
.
V
23
Giving us a maximum I
of:
0.97A (-22%)
I
LIMIT_MIN
0.2A
0.3A
0.4A
0.5A
0.6A
0.7A
0.8A
0.9A
1.1A
1.2A
1.3A
1.4A
1.5A
I
0.1A
0.2A
0.3A
0.4A
0.5A
0.6A
0.7A
0.8A
0.9A
I
OUT
1A
OUT
Table 2. MIC20x9A R
Table 3. MIC20x9 R
1125Ω
1928Ω
765Ω
582Ω
470Ω
395Ω
341Ω
300Ω
268Ω
243Ω
222Ω
204Ω
189Ω
176Ω
165Ω
R
993Ω
673Ω
511Ω
413Ω
346Ω
299Ω
263Ω
235Ω
R
SET
SET
I
LIMIT_TYP
1.25A
LIMIT
I
I
0.127A
0.202A
0.281A
0.361A
0.443A
0.526A
0.610A
0.695A
0.781A
0.868A
0.956A
1.044A
1.133A
1.222A
LIMIT_MIN
0.063A
0.137A
0.216A
0.296A
0.379A
0.463A
0.548A
0.634A
0.722A
LIMIT_MIN
variation over temperature
SET
SET
Table
Table
MIC20xx Family
M9999-080211-D
I
I
1.5A (+20%)
LIMIT_MAX
0.136A
0.265A
0.391A
0.515A
0.637A
0.759A
0.880A
1.001A
1.121A
LIMIT_MAX
0.267A
0.390A
0.510A
0.629A
0.746A
0.861A
0.976A
1.089A
1.202A
1.314A
1.426A
1.537A
1.647A
1.757A
I
LIMIT_MAX