MIC5018 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – IttyBitty™ High-Side MOSFET Driver Preliminary Information

MIC5018
Micrel
MIC5018
IttyBitty™ High-Side MOSFET Driver
Preliminary Information
General Description
Features
The MIC5018 IttyBitty™ high-side MOSFET driver is de- • +2.7V to +9V operation
signed to switch an N-channel enhancement-type MOSFET • 150µA typical supply current at 5V supply
from a TTL compatible control signal in high- or low-side • ≤ 1µA typical standby (off) current
switch applications. This driver features the tiny 4-lead • Charge pump for high-side low-voltage applications
SOT-143 package.
• Internal zener diode gate-to-ground MOSFET protection
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
• Operates in low- and high-side configurations
• TTL compatible input
• ESD protected
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’s output drives
Applications
• Battery conservation
• Power bus switching
• Solenoid and motion control
• Lamp control
the MOSFET gate voltage higher than the supply voltage. In
a typical high-side configuration, the driver is powered from ^{Ordering Information}
the load supply voltage. Under some conditions, the MIC5018 _{Part Number Temp. Range}
Package Marking
and MOSFET can switch a load voltage that is slightly higher
than the driver supply voltage.
MIC5018BM4 –40°C to +85°C SOT-143
H10
In a low-side configuration, the driver can control a MOSFET
5
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 –40°C to +85°C ambient temperature range.
Typical Applications
+5V
4.7µF
On
Off
MIC5018
2
VS
3
G
4 _{CTL GND} 1
* International Rectifier
100mΩ, 17A max.
TO-220 package
IRFZ24*
N-Channel
MOSFET
Low-Voltage High-Side Power Switch
‡ _{Load voltage limited only by}
V_LOAD
‡
SUPPLY
MOSFET drain-to-source rating
* Siliconix
30mΩ, 7A max., 30V VDS max.
8-lead SOIC package
+2.7 to +9V
4.7µF
On
Off
MIC5018
2 _VS
G³
4 _{CTL GND} 1
Si9410DY*
N-channel
MOSFET
Low-Side Power Switch
1997
5-155