Document
MIC5018
Micrel
MIC5018
IttyBitty™ High-Side MOSFET Driver Preliminary Information
General Description
The MIC5018 IttyBitty™ high-side MOSFET driver is designed 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 MOSFET approaches the supply voltage when switched on. To keep the MOSFET turned on, the MIC5018’s 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 –40°C to +85°C ambient temperature range.
Features
• • • • • • • • • • • • +2.7V to +9V operation 150µA typical supply current at 5V supply ≤ 1µA 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 –40°C to +85°C Package SOT-143 Marking H10
5
Typical Applications
+5V
‡
Load voltage limited only by MOSFET drain-to-source rating
VLOAD SUPPLY‡
2 4
VS CTL
G GND
3 1
+2.7 to +9V 4.7µF MIC5018
2 4 On Off 3 1
Load
On Off
Load
Si9410DY* N-channel MOSFET
4.7µF
MIC5018
IRFZ24* N-Channel MOSFET
* Siliconix 30mΩ, 7A max., 30V VDS max. 8-lead SOIC package
VS CTL
G GND
* International Rectifier 100mΩ, 17A max. TO-220 package
Low-Voltage High-Side Power Switch
Low-Side Power Switch
1997
5-155
MIC5018
Micrel
Pin Configuration
VS
2
GND
1
Part Identification
Early production identification: MH10
3
H10
4
G
CTL
SOT-143 (M4)
Pin Description
Pin Number 1 2 3 4 Pin Name GND VS G CTL Pin Function Ground: Power return. Supply (Input): +2.7V to +9V supply. Gate (Output): Gate connection to external MOSFET. Control (Input): TTL compatible on/off control input. Logic high drives the gate output above the supply voltage. Logic low forces the gate output near ground.
5-156
1997
MIC5018
Micrel
Lead Temperature, Soldering 10sec. ........................ 300°C Package Thermal Resistance SOT-143 θJA ..................................................... 220°C/W SOT-143 θJC ..................................................... 130°C/W
Absolute Maximum Ratings
Supply Voltage (VSUPPLY) ........................................... +10V Control Voltage (VCTL) ................................. –0.6V to +16V Gate Voltage (VG) ....................................................... +16V Ambient Temperature Range (TA) ............. –40°C to +85°C
Electrical Characteristics
Parameter Supply Current Condition (Note 1) VSUPPLY = 3.3V VSUPPLY = 5V Control Input Voltage 2.7V ≤ VSUPPLY ≤ 9V 2.7V ≤ VSUPPLY ≤ 5V 5V ≤ VSUPPLY ≤ 9V Control Input Current Control Input Capacitance Zener Diode Output Clamp Gate Output Voltage VSUPPLY = 9V VSUPPLY = 2.7V VSUPPLY = 3.0V VSUPPLY = 4.5V Gate Output Current Gate Turn-On Time Gate Turn-Off Time VSUPPLY = 5V VSUPPLY = 4.5V VSUPPLY = 4.5V VOUT = 10V, Note 3 CL = 1000pF, Note 4 CL = 3000pF, Note 4 CL = 1000pF, Note 5 CL = 3000pF, Note 5 2.7V ≤ VSUPPLY ≤ 9V Note 2 13 6.3 7.1 11.4 VCTL = 0V VCTL = 3.3V VCTL = 0V VCTL = 5V VCTL for logic 0 input VCTL for logic 1 input VCTL for logic 1 input 0 2.0 2.4 0.01 5 16 7.1 8.2 13.4 9.5 0.75 2.1 10 30 1.5 4.2 20 60 19 Min Typ 0.01 70 0 150 Max 1 140 1 300 0.8 VSUPPLY VSUPPLY 1 Units µA µA µA µA V V V µA pF V V V V µA ms ms µs µs
5
General Note: Devices are ESD protected, however handling precautions are recommended. Note 1: Note 2: Note 3: Note 4: Note 5: Typical values at TA = 25°C. Minimum and maximum values indicate performance at –40°C ≥ TA ≥ +85°C. Parts production tested at 25°C. Guaranteed by design. Resistive load selected for VOUT = 10V. Turn-on time is the time required for gate voltage to rise to 4V greater than the supply voltage. This represents a typical MOSFET gate threshold voltage. Turn-off time is the time required for the gate voltage to fall to 4V above the supply voltage. This represents a typical MOSFET gate thre.