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 drivers designed to switch an N-channel enhancement type MOSFET in low-side switch applications. The MIC4414 is a non-inverting driver and the MIC4415 is an inverting driver. These drivers feature short delays and high peak current to produce precise edges and rapid rise and fall times. The MIC4414/15 are powered from a 4.5V to 18V supply and can sink and source peak currents up to 1.5A, switching a 1000pF capacitor in 12ns. The onstate gate drive output voltage is approximately equal to the supply voltage (no internal regulators or clamps). High supply voltages, such as 10V, are appropriate for use with standard N-channel MOSFETs. Low supply voltages, such as 5V, are appropriate for use with many logic-level N-channel MOSFETs. In a low-side configuration, the driver can control a MOSFET that switches any voltage up to the rating of the MOSFET. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. 1. VDD Supply Connect a supply to the VS and GND terminals, paying careful attention to the polarity and the supply range (4.5V < VDD < 18V). Monitor IDD with a current meter and VDD at VS and GND terminals with voltmeter. Do not apply power until Step 4. Requirements The MIC4414/MIC4415 evaluation board requires only a single power supply to power the driver and a function generator or logic signal to drive the IN pin. Precautions The MIC4414/MIC4415 evaluation board does not have reverse polarity protection. Applying a negative voltage to the VDD and GND terminals may damage the device. The maximum VDD of the board is rated at 20V. Exceeding 20V on the VDD could damage the device. 2. Connect Function Generator to IN pin Connect the Function generator output to IN pin and GND. 3. OUT Signal The voltage on OUT pin can be monitored by either a voltmeter or with scope probe. 4. Turn on the Power Turn on the VDD supply and apply logic signal to IN pin, and verify OUT signal. The on-state gate drive output voltage is approximately equal to the supply voltage (no internal regulators or clamps). Since the 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 logic low signal on the IN pin makes the OUT signal high (typically VDD). The user has a flexibility of soldering a FET (Q1) or using different values of capacitors to imitate the gate capacitance (C3). Ordering Information Part Number Description MIC4414YFT EV MIC4414 Evaluation Board MIC4415YFT EV MIC4415 Evaluation Board Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com August 2012 M9999-082912 [email protected] or (408) 955-1690 Micrel, Inc. MIC4414/MIC4415 Evaluation Board MIC4414/MIC4415 Evaluation Board Typical Characteristics IN Bias Current vs. Supply Voltage Supply Current vs. Supply Voltage 15 400 IN = ON 300 200 100 IN = OFF 0 0.8 0.6 0.4 IN = ON 6 3 6 9 12 15 18 0 0 3 6 9 12 15 18 0 SUPPLY VOLTAGE (V) Output Sink Resistance vs. Supply Voltage 15 60 12 48 TIME (ns) 6 6 9 12 SUPPLY VOLTAGE (V) 15 18 15 18 80 CL =1000pF IN = 1MHz, 50% Duty Cycle IOUT = 10mA 9 3 Delay Time vs. Supply Voltage Rise and Fall Time vs. Supply Voltage DELAY TIME (ns) 3 IOUT = 10mA 9 0.2 SUPPLY VOLTAGE (V) 36 FALL 24 64 IN FALL 48 32 IN RISE RISE 16 12 3 0 0 0 0 3 6 9 12 15 0 18 SUPPLY VOLTAGE (V) 3 6 9 12 15 SUPPLY CURRENT (mA) 1.8 Source 1.2 Sink 0.0 100 IN = 1MHz 10 6 9 12 15 18 SUPPLY VOLTAGE (V) 12 IN = 1MHz IN = 100kHz 10 IN = 100kHz IN = 10kHz 1 VDD = 5V Duty Cycle = 50% 0.1 3 9 Supply Current vs. Load Capacitance 100 2.4 6 SUPPLY VOLTAGE (V) Supply Current vs. Load Capacitance 3.0 0 3 SUPPLY VOLTAGE (V) Peak Output Current vs. Supply Voltage 0.6 0 18 SUPPLY CURRENT (mA) ON RESISTANCE (Ω) 12 0 0 CURRENT (A) ON RESISTANCE (Ω) 1 IN BIAS CURRENT (µA) SUPPLY CURRENT (µA) 500 Output Source Resistance vs. Supply Voltage IN = 10kHz 1 VDD = 18V Duty Cycle = 50% 0.1 1 10 CAPACITANCE (nF) 100 1 10 100 CAPACITANCE (nF) Note: 1. MIC4414 ON IN =5V; OFF IN = 0V. 2. MIC4415 ON IN =0V; OFF IN = 5V. August 2012 2 M9999-082912 [email protected] or (408) 955-1690 Micrel, Inc. MIC4414/MIC4415 Evaluation Board Typical Characteristics (Continued) Output Rise and Fall Time vs. Load Capacitance Output Rise and Fall Time vs. Load Capacitance 100 100 VDD = 5V IN = 1kHz, 50% DUTY CYCLE VDD = 18V IN = 1kHz; 50% DUTY CYCLE 10 10 1 TIME (µs) TIME (µs) VDD SUPPLY CURRENT (mA) 100 VDD Supply Current vs. Frequency FALL 1 FALL RISE 0.1 0.1 0.01 RISE 10 100 CAPACITANCE (nF) CL = 10000pF CL =5000pF 10 CL =2000pF CL =1000pF CL =0pF 1 0.1 0.01 1 VDD = 5V 1 10 CAPACITANCE (nF) 100 0 1 10 100 1000 10000 IN FREQUENCY (kHz) VDD Supply Current vs. Frequency VDD SUPPLY CURRENT (mA) 100 VDD = 18V CL =10000pF CL =5000pF 10 CL =2000pF CL =1000pF CL =0pF 1 0.1 0 1 10 100 1000 10000 IN FREQUENCY (kHz) August 2012 3 M9999-082912 [email protected] or (408) 955-1690 Micrel, Inc. MIC4414/MIC4415 Evaluation Board MIC4414/MIC4415 Evaluation Board Schematic Figure 1. MIC4414/MIC4415 Evaluation board schematic Bill of Materials Item C1 Part Number GRM188R71E104KA01D C2 Manufacturer (1) Murata TDK GRM21BR61E475KA12L Murata 0.1µF/25V Ceramic Capacitor, X7R, Size 0603 1 4.7µF/25V Ceramic Capacitor, X5R, Size 0805 1 (3) AVX C3, Q1 Do not populate (DNP) MIC4414YFT U1 Qty (2) C2012X5R1E475K 08053D475KAT2A Description MIC4415YFT Micrel, Inc.(4) 1.5A/4.5V to 18V Low Side MOSFET Driver 1 Notes: 1. Murata: www.murata.com. 2. TDK: www.tdk.com. 3. AVX: www.avx.com 4. Micrel, Inc.: www.micrel.com. August 2012 4 M9999-082912 [email protected] or (408) 955-1690 Micrel, Inc. MIC4414/MIC4415 Evaluation Board Evaluation Board PCB Layout MIC4414/MIC4415 Evaluation Board Copper Layer 1 (Top) MIC4414/MIC4415 Evaluation Board Copper Layer 2 (Bottom) August 2012 5 M9999-082912 [email protected] or (408) 955-1690 Micrel, Inc. MIC4414/MIC4415 Evaluation Board MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2012 Micrel, Incorporated. August 2012 6 M9999-082912 [email protected] or (408) 955-1690