MIC2005-0.5LYM5 TR Micrel Inc, MIC2005-0.5LYM5 TR Datasheet - Page 25

• 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
C
Only parts in bold have CSLEW pin.
(Not available in 5-pin SOT-23 packages).
The C
output voltage ramp at turn-on. This input allows
designers the option of decreasing the output’s slew
rate (slowing the voltage rise) by adding an external
capacitance between the C
capacitance slows the rate at which the pass FET gate
voltage increases and thus, slows both the response to
an Enable command as well as V
value.
Figure 8 illustrates effect of C
output rise time.
Figure 7. Normalized Output Current vs. Output Voltage
Micrel, Inc.
2003
2013
SLEW
Figure 8. C
SLEW
2004
2014
pin is provided to increase control of the
0.014
0.012
0.008
0.006
0.004
0.002
0.01
SLEW
1.2
1.0
0.8
0.6
0.4
0.2
14
12
10
vs. External C
0
0
6
4
2
0
8
2005X
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
0
2015
Normalized Output Current
vs. Output Voltage (2.5V)
vs. Turn-On, Delay and Rise Times
Typical Turn-on Times
0
0.5
OUTPUT VOLTAGE (V)
0
1.0
C
0
2006
2016
SLEW
SLEW
0
1.5
SLEW
SLEW
0
(nF)
Capacitance
2.0
0
2007
2017
OUT
T
on turn-on delay and
ON
and V
0
2.5
T
’s ascent to its final
T
DELAY
RISE
0
3.0
2008
2018
0
IN
pins. This
2009X
2019X
25
C
An
capacitance is a reduction in the MIC20X5 – 20X8’s
ability to quickly limit current transients or surges. A
sufficiently large capacitance can prevent both the
primary and secondary current limits from acting in time
to prevent damage to the MIC20X5 – 20X8 or the
system from a short circuit fault. For this reason, the
upper limit on the value of C
Variable Undervoltage Lock Out (VUVLO)
Only parts in bold have VUVLO pin and functionality.
Power-conscious systems, such as those implementing
ACPI, will remain active even in their low-power states
and may require the support of external devices
through both phases of operation. Under these
conditions, the current allowed these external devices
may vary according to the system’s operating state and
as such require dual current limits on their peripheral
ports.
demanding two primary current limiting levels but
without the use of a control signal to select between
current limits.
To better understand how the MIC20X6 provides this,
imagine a system whose main power supply supports
heavy loads during normal operation, but in sleep mode
is reduced to only few hundred milliamps of output
current. In addition, this system has several USB ports
which must remain active during sleep. During normal
operation, each port can support a 500mA peripheral,
but in sleep mode their combined output current is
limited to what the power supply can deliver minus
whatever the system itself is drawing.
If a peripheral device is plugged in which demands
more current than is available, the system power supply
will sag, or crash. The MIC20X6 prevents this by
monitoring both the load current and V
operation, when the power supply can source plenty of
current, the MIC20X6 will support any load up to its
factory programmed current limit. When the weaker,
standby supply is in operation, the MIC20X6 monitors
V
predetermined value. This predetermined voltage is
user programmable and set by the selection of the
resistor divider driving the VUVLO pin.
2003
2013
IN
SLEW
and will shut off its output should V
unavoidable
’s Effect on I
The
2004
2014
MIC20X6
2005X
2015
LIMIT
consequence
2006
2016
is
SLEW
designed
is 4nF.
2007
2017
of
MIC20xx Family
IN
M9999-080211-D
. During normal
adding
2008
2018
IN
for
dip below a
systems
2009X
2019X
C
SLEW