MIC5018
Micrel
MIC5018
IttyBitty鈩?High-Side MOSFET Driver
Preliminary Information
General Description
The MIC5018 IttyBitty鈩?high-side MOSFET driver is de-
signed to switch an N-channel enhancement-type MOSFET
from a TTL compatible control signal in high- or low-side
switch applications. This driver features the tiny 4-lead
SOT-143 package.
The MIC5018 is powered from a +2.7V to +9V supply and
features extremely low off-state supply current. An internal
charge pump drives the gate output higher than the driver
supply voltage and can sustain the gate voltage indefinitely.
An internal zener diode limits the gate-to-source voltage to a
safe level for standard N-channel MOSFETs.
In high-side configurations, the source voltage of the MOS-
FET approaches the supply voltage when switched on. To
keep the MOSFET turned on, the MIC5018鈥檚 output drives
the MOSFET gate voltage higher than the supply voltage. In
a typical high-side configuration, the driver is powered from
the load supply voltage. Under some conditions, the MIC5018
and MOSFET can switch a load voltage that is slightly higher
than the driver supply voltage.
In a low-side configuration, the driver can control a MOSFET
that switches any voltage up to the rating of the MOSFET.
The gate output voltage is higher than the typical 3.3V or 5V
logic supply and can fully enhance a standard MOSFET.
The MIC5018 is available in the SOT-143 package and
is rated for 鈥?0掳C to +85掳C ambient temperature range.
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
+2.7V to +9V operation
150碌A typical supply current at 5V supply
鈮?/div>
1碌A typical standby (off) current
Charge pump for high-side low-voltage applications
Internal zener diode gate-to-ground MOSFET protection
Operates in low- and high-side configurations
TTL compatible input
ESD protected
Battery conservation
Power bus switching
Solenoid and motion control
Lamp control
Applications
Ordering Information
Part Number
MIC5018BM4
Temp. Range
鈥?0掳C to +85掳C
Package
SOT-143
Marking
H10
5
Typical Applications
+5V
鈥?/div>
Load voltage limited only by
MOSFET drain-to-source rating
V
LOAD SUPPLY鈥?/div>
2
4
VS
CTL
G
GND
3
1
+2.7 to +9V
4.7碌F
MIC5018
2
4
On
Off
3
1
Load
On
Off
Load
Si9410DY*
N-channel
MOSFET
4.7碌F
MIC5018
IRFZ24*
N-Channel
MOSFET
* Siliconix
30m
鈩?/div>
, 7A max., 30V V
DS
max.
8-lead SOIC package
VS
CTL
G
GND
* International Rectifier
100m
鈩?/div>
, 17A max.
TO-220 package
Low-Voltage High-Side Power Switch
Low-Side Power Switch
1997
5-155
MIC5018相关型号PDF文件下载
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