MIC5019 Evaluation Board Ultra-Small High-Side N-Channel MOSFET Driver with Integrated Charge Pump General Description Getting Started The MIC5019 is a high-side MOSFET driver with integrated charge pump designed to switch an Nchannel enhancement type MOSFET in high-side or low–side applications. The MIC5019 operates from a 2.7V to 9V supply. It generates gate voltages of 9.2V from a 3V supply and 16V from a 9V supply. The device consumes a low 77µA of supply current and less than 1µA of supply current in shutdown mode. In high-side configurations, the source voltage of the MOSFET approaches the supply voltage when switched on. To keep the MOSFET on, the MIC5019’s output drives the MOSFET gate voltage higher than the supply voltage. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Requirements The MIC5019 evaluation board needs only a single power supply to power the driver and a function generator or logic signal to drive the IN pin. If the application needs different supplies for driver and load, then another supply may be used to power the external MOSFET at the VEXT (J7 and J6) by loading the resistor R1 and cutting the traces indicated by R4. Precautions The MIC5019 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 10V. Exceeding 10V on the VDD could damage the device. 1. VDD Supply Connect a supply to the VDD and GND terminals, paying careful attention to the polarity and the supply range (2.7V < VIN < 9V). Monitor IIN with a current meter and VIN at VDD and GND terminals with a voltmeter. Do not apply power until step 4. 2. Connect Function Generator to IN pin Connect the function generator output to the IN pin and GND. 3. OUT Signal The voltage on the OUT pin can be monitored by using either a voltmeter or a high-impedance scope probe. 4. Turn on the Power Turn on the VDD supply, apply a logic high signal to the IN pin, and verify the OUT signal. The OUT pin is supplied by an internal charge pump; the charge pump is enabled when IN is logic high. The charge pump consists of an oscillator and a voltage quadrupler (4×). The oscillator operates from 70kHz to 100kHz, depending on the supply voltage and temperature. The output voltage is limited to 16V, typically by an internal zener diode clamp. The charge pump output voltage is approximately: VOUT = 4 × VDD – 2.8V, but not exceeding 19Vmax. Refer to the “Output Voltage vs. Supply Voltage” graph in the “Typical Characteristics” section. The user has a flexibility of either soldering a FET (Q1) or using different values of capacitors to imitate the gate capacitance (C5). Ordering Information Part Number Description MIC5019YFT EV MIC5019 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 M9999-082212-A [email protected] or (408) 955-1690 Micrel, Inc. MIC5019 Evaluation Board Typical Characteristics VDD Supply Current vs. Supply Voltage VDD Supply Current vs. Supply Voltage 1.0 1.0 20 -40°C 25°C 0.4 0.2 OUTPUT VOLTAGE (V) SUPPLY CURRENT (µ A) 0.8 0.6 125°C IN=GND IN=VDD SUPPLY CURRENT (mA) Output Voltage vs. Supply Voltage 0.8 0.6 0.4 25°C -40°C 125°C 0.2 16 -40°C 25°C 12 8 4 125°C 2 0 4 6 8 4 0 10 8 6 SUPPLY VOLTAGE (V) Output Voltage vs. Output Current Output Voltage vs. Output Current IN Current vs. Supply Voltage VDD=IN =5V 12 10 VDD = IN = 3.3V 8 6 VDD = IN = 2.7V 12 10 4 0 80 100 120 140 -40°C 6 2 60 25°C 8 0 40 0.8 14 2 20 IN = 2.7V VDD=IN=5V IN CURRENT (µ A) OUTPUT VOLTAGE (V) 14 160 10 1.0 16 VDD=IN=9V 0 8 6 4 SUPPLY VOLTAGE (V) 18 4 2 SUPPLY VOLTAGE (V) 16 0.6 0.4 125°C 0.2 125°C 20 40 60 80 100 120 140 160 -40°C 25°C 0.0 0 0 2 4 6 8 10 SUPPLY VOLTAGE (V) OUTPUT CURRENT (µA) OUTPUT CURRENT (µA) OUT Turn-Off Time vs. Load Capacitance OUT Turn-On Time vs. Load Capacitance 5 20 TURN-OFF TIME (µ s) TURN-ON TIME (ms) 2 0 10 18 OUTPUT VOLTAGE (V) 0 0.0 0.0 4 VDD=3V 3 2 VDD=9V VDD=5V 1 0 16 12 8 VDD=3V VDD=5V 4 VDD=9V 0 0 1000 2000 3000 CAPACITANCE (pF) August 2012 4000 5000 0 1000 2000 3000 4000 5000 CAPACITANCE (pF) 2 M9999-082212-A [email protected] or (408) 955-1690 Micrel, Inc. MIC5019 Evaluation Board MIC5019 Evaluation Board Schematic Figure 1. MIC5019 Evaluation Board Schematic Bill of Materials Item C1 Part Number GRM188R71C104KA01D C2 Manufacturer Description Murata (1) 0.1µF/16V Ceramic Capacitor, X7R, Size 0603 TDK GRM21BR71C475KA73L Murata 4.7µF/16V Ceramic Capacitor, X7R, Size 0805 1 (3) AVX R1, R3, C3, C4, Q1, C5 R2 Do not populate (DNP) CRCW06030000FKEA U1 1 (2) C2012X7R1C475K 0805YC475KAT2A Qty. MIC5019YFT (4) 0Ω Resistor, Size 0603, 5% 1 (5) High-Side/Low-Side MOSFET Driver 1 Vishay Dale Micrel. Inc. Notes: 1. Murata: www.murata.com. 2. TDK: www.tdk.com. 3. AVX: www.avx.com. 4. Vishay: www.vishay.com. 5. Micrel, Inc.: www.micrel.com. August 2012 3 M9999-082212-A [email protected] or (408) 955-1690 Micrel, Inc. MIC5019 Evaluation Board Evaluation Board PCB Layout MIC5019 Evaluation Board − Copper Layer 1 (Top) MIC5019 Evaluation Board − Copper Layer 2 (Bottom) August 2012 4 M9999-082212-A [email protected] or (408) 955-1690 Micrel, Inc. MIC5019 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 5 M9999-082212-A [email protected] or (408) 955-1690