mic5019 evaluation board ultra - small high - side n - channel mosfet driver with integrated charge pump 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 -0 8 221 2 - a hbwhelp@micrel.com or (408) 955 - 1690 general description the mic5019 is a high - side mosfet driver with integrated charge pump designed to switch an n - c hannel enhancement type mosfet in high - side or low ? side applications. the mic5019 operates from a 2.7v to 9v supply . it generates gate voltag es of 9.2v from a 3v supply and 16v from a 9v supply. the device consumes a low 77 a of supply current and less than 1 a 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 . re quirements 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. i f the application needs different supplies for driver and load , then a nother supply may be used to p ower the external mosfet at the vext (j7 and j 6 ) by loading the resistor r1 and cutting the traces indicated by r4 . precautions the mic 5019 evaluation board does not have reverse polarity protection. applying a negative voltage to the vdd and gnd terminals may damage the device. the maximum v dd of the board is rated at 10 v . exceeding 10v on the vdd could damage the device . getting started 1. v dd supply connect a suppl y to the v dd and gnd terminals, paying careful attention to the polarity and the supply ra nge ( 2.7 v < v in < 9 v ). monitor i in with a current meter and v in at v dd and gnd terminals with a voltmeter . d o not apply power until step 4 . 2. connect function generator to in pin connect the f unction generator output to the in pin and gnd. 3 . out s ignal t he voltage on the out pin can be monitored by using either a voltmeter or a high - impedance scope probe. 4 . turn o n 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 interna l charge pump ; the charge pump is enabled when in is logic high. the charge pump consists of an oscillator and a voltage quadruple r (4 ). the oscillator operates from 70khz to 100khz , depending on the supply voltage and temperature. the o utput voltage is l imited to 16v , typically by a n internal zener diode clamp . the charge pump output voltage is approximately: v out = 4 v dd ? 2.8v, but not exceeding 19vmax. r efer to the ?output v oltage vs . supply v oltage ? graph in the ?typical characteristics ? section. the user has a flexibility of e ither solder ing a fet (q1) or us ing different values of capacitors to imitate the gate capacitance (c5). or dering information part number description mic5019 yft ev mic5 01 9 evaluation board
micrel, inc. mic5019 evaluation board august 2012 2 m9999 -082 2 12 - a hbwhelp@micrel.com or (408) 955 - 16 90 typica l characteristics vdd supply current vs. supply voltage 0.0 0.2 0.4 0.6 0.8 1.0 0 2 4 6 8 10 supply voltage (v) supply current (ma) -40c 25 c 125 c in=vdd vdd supply current vs. supply voltage 0.0 0.2 0.4 0.6 0.8 1.0 0 2 4 6 8 10 supply voltage (v) supply current ( a) -40c 25 c 125 c in=gnd output voltage vs. supply voltage 0 4 8 12 16 20 0 2 4 6 8 10 supply voltage (v) output voltage (v) -40c 125c 25 c output voltage vs. output current 0 2 4 6 8 10 12 14 16 18 0 20 40 60 80 100 120 140 160 output current ( a) output voltage ( v) vdd = in = 2.7v vdd = in = 3.3v vdd=in =5v vdd=in=9v output voltage vs. output current 0 2 4 6 8 10 12 14 16 18 0 20 40 60 80 100 120 140 160 output current ( a) output voltage (v) -40 c 25c 125c vdd=in=5v in current vs. supply voltage 0.0 0.2 0.4 0.6 0.8 1.0 0 2 4 6 8 10 supply voltage (v) in current ( a) -40c 25c 125c in = 2.7v out turn-on time vs. load capacitance 0 1 2 3 4 5 0 1000 2000 3000 4000 5000 capacitance (pf) turn-on time (ms) vdd=9v vdd=5v vdd=3v out turn-off time vs. load capacitance 0 4 8 12 16 20 0 1000 2000 3000 4000 5000 capacitance (pf) turn-off time ( s) vdd=5v vdd=3v vdd=9v
micrel, inc. mic5019 evaluation board august 2012 3 m9999 -082 2 12 - a hbwhelp@micrel.com or (408) 955 - 16 90 mic5019 evaluation board schematic figure 1. mic5019 evaluation b oard s chematic bill of materials item part number manufacturer description qty . c1 grm188r71c104ka01d murata (1) 0.1 f /16v ceramic cap acitor, x 7 r, size 0603 1 c2 c2012x7r1c475k tdk ( 2 ) 4.7 f /16v ceramic capacitor, x 7 r, size 0805 1 grm21br71c475ka73l murata 0805yc475kat2a avx ( 3 ) r1, r3, c3, c4, q1, c5 do not populate (dnp) r2 crcw06030000fkea vishay dale ( 4 ) 0 resisto r, size 0603, 5% 1 u1 mic5019yft micrel. inc. ( 5 ) high - side/low - side mosfet driver 1 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 .
micrel, inc. mic5019 evaluation board august 2012 4 m9999 -082 2 12 - a hbwhelp@micrel.com or (408) 955 - 16 90 evaluation board pcb layout mic5019 evaluation board ? copper layer 1 (top) mic5019 evaluation bo ard ? copper layer 2 (bottom)
micrel, inc. mic5019 evaluation board august 2012 5 m9999 -082 2 12 - a hbwhelp@micrel.com or (408) 955 - 16 90 micrel, in c. 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 notic e. 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 whatsoe ver, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including liabil ity 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 mal function of a product can reasonably be expected to result in personal injury. life support devices o r systems are de vices 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 res ult in a significant injury to the user. a purchaser?s use or sale of micrel products fo r 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. ? 201 2 micrel, incorporated.
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