MIC4415YFT T5 Microchip

MIC4414/MIC4415 Evaluation Board 1.5A / 4.5V to 18V Low-Side MOSFET Driver General Description Getting Started The MIC4414 and MIC4415 are low-side MOSFET 1. VDD Supply drivers designed to switch an N-channel enhancement Connect a supply to the VS and GND terminals, type MOSFET in low-side switch applications. The paying careful attention to the polarity and the supply MIC4414 is a non-inverting driver and the MIC4415 is range (4.5V < VDD < 18V). Monitor I with a current DD an inverting driver. These drivers feature short delays meter and VDD at VS and GND terminals with and high peak current to produce precise edges and voltmeter. Do not apply power until Step 4. rapid rise and fall times. The MIC4414/15 are powered from a 4.5V to 18V 2. Connect Function Generator to IN pin supply and can sink and source peak currents up to Connect the Function generator output to IN pin and 1.5A, switching a 1000pF capacitor in 12ns. The on- GND. state gate drive output voltage is approximately equal to the supply voltage (no internal regulators or 3. OUT Signal clamps). High supply voltages, such as 10V, are appropriate for use with standard N-channel The voltage on OUT pin can be monitored by either a MOSFETs. Low supply voltages, such as 5V, are voltmeter or with scope probe. appropriate for use with many logic-level N-channel MOSFETs. 4. Turn on the Power In a low-side configuration, the driver can control a Turn on the VDD supply and apply logic signal to IN MOSFET that switches any voltage up to the rating of pin, and verify OUT signal. The on-state gate drive the MOSFET. output voltage is approximately equal to the supply Datasheets and support documentation can be found voltage (no internal regulators or clamps). Since the on Micrels web site at: www.micrel.com. MIC4414 is a non-inverting driver so a logic high signal on the IN pin makes the OUT signal high (typically VDD) and MIC4415 is an inverting driver so Requirements logic low signal on the IN pin makes the OUT signal high (typically VDD). The MIC4414/MIC4415 evaluation board requires only a single power supply to power the driver and a The user has a flexibility of soldering a FET (Q1) or function generator or logic signal to drive the IN pin. using different values of capacitors to imitate the gate capacitance (C3). Precautions Ordering Information The MIC4414/MIC4415 evaluation board does not have reverse polarity protection. Applying a negative Part Number Description voltage to the VDD and GND terminals may damage MIC4414YFT EV MIC4414 Evaluation Board the device. The maximum VDD of the board is rated at 20V. Exceeding 20V on the VDD could damage the MIC4415YFT EV MIC4415 Evaluation Board device. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC4414/MIC4415 Evaluation Board MIC4414/MIC4415 Evaluation Board Typical Characteristics IN Bias Current Supply Current Output Source Resistance vs. Supply Voltage vs. Supply Voltage vs. Supply Voltage 500 15 1 400 12 IN = ON 0.8 I = 10mA OUT 300 9 0.6 200 0.4 6 IN = ON 100 0.2 3 IN = OFF 0 0 0 03 69 12 15 18 0 3 6 9 12 15 18 0 3 6 9 12 15 18 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Output Sink Resistance Delay Time Rise and Fall Time vs. Supply Voltage vs. Supply Voltage vs. Supply Voltage 80 15 60 C =1000pF L 64 IN = 1MHz, 50% Duty Cycle 12 48 I = 10mA OUT IN FALL 48 9 36 FALL 32 6 24 IN RISE RISE 16 12 3 0 0 0 0 3 6 9 12 15 18 03 69 12 15 18 0 3 6 9 12 15 18 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Peak Output Current Supply Current Supply Current vs. Supply Voltage vs. Load Capacitance vs. Load Capacitance 3.0 100 100 IN = 1MHz IN = 1MHz 2.4 IN = 100kHz 10 10 1.8 IN = 100kHz Source IN = 10kHz 1.2 IN = 10kHz 1 1 Sink VDD = 18V 0.6 VDD = 5V Duty Cycle = 50% Duty Cycle = 50% 0.0 0.1 0.1 0 3 6 9 12 15 18 1 10 100 1 10 100 SUPPLY VOLTAGE (V) CAPACITANCE (nF) CAPACITANCE (nF) Note: 1. MIC4414 ON IN =5V OFF IN = 0V. 2. MIC4415 ON IN =0V OFF IN = 5V. 2 M9999-082912 August 2012 hbwhelp micrel.com or (408) 955-1690 CURRENT (A) ON RESISTANCE () SUPPLY CURRENT (A) SUPPLY CURRENT (mA) TIME (ns) IN BIAS CURRENT (A) ON RESISTANCE () SUPPLY CURRENT (mA) DELAY TIME (ns)