MIC2040-1YMM Micrel Inc, MIC2040-1YMM Datasheet - Page 12
![IC DISTRIBUTION SW SGL 10-MSOP](/photos/6/84/68455/576-10-msop_sml.jpg)
MIC2040-1YMM
Manufacturer Part Number
MIC2040-1YMM
Description
IC DISTRIBUTION SW SGL 10-MSOP
Manufacturer
Micrel Inc
Type
High Side Switchr
Datasheet
1.MIC2040-1YMM.pdf
(15 pages)
Specifications of MIC2040-1YMM
Number Of Outputs
1
Rds (on)
75 mOhm
Internal Switch(s)
Yes
Current Limit
Adjustable
Voltage - Input
0.8 ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Short Circuit Current Limit
0.25 to 1.5A
Input Voltage Range
0.8 to 5.5V
Number Of Switches
Single
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
10
Package Type
MSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
576-1693-5
MIC2040-1YMM
MIC2040-1YMM
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MIC2040-1YMM
Manufacturer:
MICREL
Quantity:
2 000
Part Number:
MIC2040-1YMM
Manufacturer:
MIC
Quantity:
20 000
MIC2040/2041
/FAULT
The /FAULT signal is an N-Channel, open-drain MOSFET
output. An external pull-up resistor tied to a maximum 6V rail
is required for the /FAULT pin. The /FAULT pin is asserted
(active-low) when either an overcurrent or thermal shutdown
condition occurs. During a hot insert of a PCB or when turning
on into a highly capacitive load, the resulting high transient
inrush current may exceed the current limit threshold of the
MIC2040/41. In the case where an overcurrent condition
occurs, /FAULT will assert only after the flag delay time has
elapsed, typically 28ms. This ensures that /FAULT is as-
serted only upon valid overcurrent conditions and that nui-
sance error reporting is prevented.
Thermal Shutdown
For the MIC2040, thermal shutdown is employed to protect
the device from damage should the die temperature exceed
safe margins due to a short circuit or an excessive load.
Thermal shutdown shuts off the output MOSFET and asserts
the /FAULT output if the die temperature exceeds 140°C. The
MIC2040 automatically resets its output and resumes supply-
ing current to the load when the die temperature drops to
120°C. If the fault is still present, the MIC2040 will quickly
reheat and shut down again. This process of turning
ON-OFF-ON is called thermal cycling and will continue as
long as the power switch is enabled while the fault or
excessive load is present.
M9999-012004
12
Depending on PCB layout (including thermal considerations
such as heat sinking), package, and ambient temperature, it
may take several hundred milliseconds from the incidence of
the fault to the output MOSFET being shut off.
Circuit Breaker Function (MIC2041)
The MIC2041 is designed to shut off all power to the load
when a fault condition occurs, just as a circuit breaker would
do. A fault condition is deemed to be anytime the output
current exceeds the current limit for more than the flag delay
period, nominally 28ms. Once the output shuts off, it remains
off until either the fault load is removed from VOUT or the EN
input is cycled ON-OFF-ON. If the fault is still present after EN
has been cycled, the MIC2041 will again shut off all power to
the load after 28ms. Once the fault has been removed, then
normal operation will resume.
Open Load Detection
The MIC2041 will automatically reset its output when the fault
load is cleared. This is accomplished by applying a small
current to VOUT and watching for the voltage at VOUT to rise
to within 200mV of VIN. This current is supplied by an internal
resistor connected to VIN and is connected to VOUT when
MIC2041 latches off.
January 2005
Micrel