Dual High-Speed 1.5A MOSFET Drivers

Transcription

1 19-132; Rev 2; 6/6 Dual High-Speed 1.A MOSFE Drivers General Description he are dual monolithic MOSFE drivers designed to tralate L/CMOS inputs to high voltage/current outputs. he MAX4426 is a dual inverting power MOSFE driver. he MAX4427 is a dual noninverting power MOSFE driver, and the MAX4428 contai one inverting section and one noninverting section. Delay times are nearly independent of VDD (see ypical Operating Characteristics). High-current output drivers rapidly charge and discharge the gate capacitance of even the largest power MOSFEs to within millivolts of the supply rails. his produces the power MOSFEs' minimum on resistance. he 's high speed minimizes power losses in switching power supplies and DC-DC converters. Switching Power Supplies DC-DC Converters Motor Controllers Pin-Diode Drivers Charge-Pump Voltage Inverters N.C. 1 8 Applicatio Pin Configuratio N.C. INA 2 7 OUA MAX4426 GND 3 6 V DD INB 4 OUB OP VIEW 2, 4 7, INVERING S Upgrade for SC4426/4427/4428 S Lower On Resistance: 4Ω vs. 7Ω S Shorter Delay imes: td1-1 vs. 3 td2-2 vs. S 1.A Peak Output Current Features S Fast Rise and Fall imes: ypically 2 with 1pF Load S Wide Operating Range: 4.V to 18V S Low Power Coumption: 1.8mA with Logic 1 Input 2µA with Logic Input S L/CMOS Compatible S Latchup Protected-Withstand > ma Reverse Current S ESD Protected Ordering Information PAR EMP RANGE PIN-PACKAGE MAX4426CPA NC to +7NC 8 Plastic DIP MAX4426CSA NC to +7NC 8 SO MAX4426C/D NC to +7NC Dice* MAX4426EPA -4NC to +8NC 8 Plastic DIP MAX4426ESA -4NC to +8NC 8 SO MAX4426EJA -4NC to +8NC 8 CERDIP MAX4426MJA -NC to +12NC 8 CERDIP** Ordering Information continued on last page. *Dice are tested at. **Contact factory for availability and processing to MIL-SD-883. DIP/SO ypical Operating Circuit N.C. 1 8 N.C. INA 2 7 OUA MAX4427 GND 3 6 V DD 2, 4 7, 4.7µF.1µF INB 4 OUB NONINVERING DIP/SO MAX4426 N.C. 1 8 INA 2 7 MAX4428 N.C. OUA GND 3 6 V DD INB 4 OUB A B OUPU* OUPU* DIP/SO Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 ABSOLUE MAXIMUM RAINGS Supply Voltage V DD to GND... +2V ime V IL < V IN_ < V IH... Input Voltage...V DD +.3V to GND -.3V Continuous Power Dissipation ( A = +7 C) Plastic DIP (derate 9.9mW/ C above +7 C)...727mW SO (derate.88mw/ C above +7 C)...471mW CERDIP (derate 8.mW/ C above +7 C)...64mW ELECRICAL CHARACERISICS (V DD = +4.V to +18V, A = MIN to MAX, unless otherwise specified.) Operating emperature Ranges: MAX442_C... C to +7 C MAX442_E C to +8 C MAX442_MJA... - C to +12 C Storage emperature Range... - C to +16 C Maximum Chip emperature...+1 C Lead emperature (soldering, 1 sec)...+3 C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. hese are stress ratings only, and functional operation of the device at these or any other conditio beyond those indicated in the operational sectio of the specificatio is not implied. Exposure to absolute maximum rating conditio for extended periods may affect device reliability. PARAMEER SYMBOL CONDIIONS MIN YP MAX UNIS Logic 1 Input Voltage V IH 2.4 V Logic Input Voltage V IL.8 V Input Current I IN V IN = V to 18V -1 1 µa Output High Voltage V OH No load Output Low Voltage V OL No load 2 mv V DD - 2 mv Output Resistance R OU I LOAD = V DD = 18V, 1mA V IN =.8V for inverting stages, V IN = 2.4V for noninverting stages V IN = 2.4V for inverting stages, V IN =.8V for noninverting stages 4 1 A = MIN to MAX A = MIN to MAX 12 ω Peak Output Current I PK V DD = 18V 1. A Power-Supply Current I SUPP V IN = +3V for both inputs V IN = V for both inputs A = MIN to MAX A = MIN to MAX.3.6 Rise ime (Note 1) t A = +2 C 2 3 R A = MIN to MAX 2 4 Fall ime (Note 1) t A = +2 C 2 3 F A = MIN to MAX 2 4 Delay ime (Note 1) t A = +2 C 1 3 D1 A = MIN to MAX 1 4 t A = +2 C 2 D2 A = MIN to MAX 3 6 Note 1: Switching times guaranteed by design, not tested. See Figure 1 for timing measuremenl circuit. ma 2

3 MAX4426 RISE AND FALL IME vs. SUPPLY VOLAGE C L = 1pF 1 1 SUPPLY VOLAGE (V) t F t R MAX4426/27/28t oc C L = 1pF MAX4426 DELAY IME vs. SUPPLY VOLAGE 1 ypical Operating Characteristics 1 SUPPLY VOLAGE (V) MAX4426/27/28 toc MAX4426 RISE AND FALL IME vs. EMPERAURE C L = 1pF t R, t F EMPERAURE ( C) MAX4426/27/28 toc C L = 1pF MAX4426 DELAY IME vs. EMPERAURE MAX4426/27/28 toc4 SUPPLY CURREN (ma) MAX4426 SUPPLY CURREN vs. CAPACIIVE LOAD V DD = +16V 2kHz 4kHz MAX4426/27/28 toc 1k 1 1 MAX4426 RISE AND FALL IME vs. CAPACIIVE LOAD t R, t F MAX4426/27/28 toc6 1 2kHz EMPERAURE ( C) , CAPACIIVE LOAD (pf) , CAPACIIVE LOAD (pf) SUPPLY CURREN (ma) MAX4426 SUPPLY CURREN vs. FREQUENCY C L = 1pF V DD = +1V V DD = +V MAX4426/27/28 toc7 (VDD - VOU) (V).6.3 MAX4426 OUPU HIGH VOLAGE vs. SOURCE CURREN V DD = +8V V DD = +13V MAX4426/27/28 toc8 OUPU VOLAGE (V).6.3 MAX4426 OUPU LOW VOLAGE vs. SOURCE CURREN V DD = +8V V DD = +13V MAX4426/27/28 toc FERQUENCY (khz) SOURCE CURREN (ma) SOURCE CURREN (ma) 3

4 Applicatio Information he have easy-to-drive inputs. However, these inputs must never be allowed to stay between VIH and VIL for more than. Unused inputs should always be connected to ground to minimize supply current. Drivers can be paralleled on the MAX4426 or MAX4427 by tying both Inputs together and both outputs together. Supply bypassing and grounding are extremely important with the, as the peak supply current can be as high as 3A, which is twice the peak output current. Ground drops are a form of negative feedback with inverters, and hence will degrade the delay and traition time of the MAX4426/MAX4428. Suggested bypass capacitors are a 4.7µF (low ESR) capacitor in parallel with a.1µf ceramic capacitor, mounted as close as possible to the. Use a ground plane if possible or separate ground retur for inputs and outputs. Output voltage ringing can be minimized with a Ω to 2Ω resistor in series with the output, but this will degrade output traition time. Ringing may be undesirable due to the large current that flows through capacitive loads when the voltage across these loads traitio quickly. Operation at the upper end of the supply voltage range (> 1V) requires that a capacitance of at least pf be present at the outputs. his prevents the supply voltage provided to the die (which can be different from that seen at the Ie supply pin) from exceeding the 2V absolute maximum rating, due to overshoot. Since at least pf of gate capacitance is present in all higher power FEs, this requirement is easily met. Power Dissipation he power dissipation coists of input inverter losses, crowbar current through the output devices, and output current (either capacitive or resistive). he sum of these must be kept below the maximum power dissipation limit. he DC input inverter supply current is.2ma when both inputs are low and 2mA when both inputs are high. he crowbar current through an output device making a traition is approximately 1mA for a few nanoseconds. his is a small portion of the total supply current, except for high switching frequencies or a small load capacitance (1pF). he power dissipation when driving a ground-referenced resistive load is: P = (D) (ron(max)) (ILOAD 2 ) where D is the percentage of time the output pulls high, ron(max) is the maximum on resistance, and ILOAD is the MAX4426/4427/ 4428 load current. For capacitive loads. the power dissipation is: P = (CLOAD) (VDD 2 ) (FREQ) where CLOAD is the capacitive load. VDD is the supply voltage, and FREO is the toggle frequency. 4

5 RISE AND FALL IMES = INVERING OUPU +V +.4V +18V V MAX4428 1% 9% t F 4.7µF.1µF OUPU 1pF OUPU 1pF 9% 1% 1% t R 9% Ordering Information (continued) PAR EMP RANGE PIN-PACKAGE MAX4427CPA NC to +7NC 8 Plastic DIP MAX4427CSA NC to +7NC 8 SO MAX4427C/D NC to +7NC Dice* MAX4427EPA -4NC to +8NC 8 Plastic DIP MAX4427ESA -4NC to +8NC 8 SO MAX4427EJA -4NC to +8NC 8 CERDIP MAX4427MJA -NC to +12NC 8 CERDIP** MAX4428CPA NC to +7NC 8 Plastic DIP MAX4428CSA NC to +7NC 8 SO MAX4428C/D NC to +7NC Dice* MAX4428EPA -4NC to +8NC 8 Plastic DIP MAX4428ESA -4NC to +8NC 8 SO MAX4428EJA -4NC to +8NC 8 CERDIP MAX4428MJA -NC to +12NC 8 CERDIP** *Dice are tested at. **Contact factory for availability and processing to MIL-SD-883. NONINVERING OUPU +18V V 1% t R 9% 9% 1% t F Chip opography Figure 1. Inverting and Noninverting est Circuit SUBSRAE CONNECED O VDD; RANSISOR COUN: 26. MAX4427/MAX4428

6 Package Information (he package drawing(s) in this data sheet may not reflect the most current specificatio. For the latest package outline information go to 6

7 REVISION NUMBER REVISION DAE DESCRIPION Revision History PAGES CHANGED 2 6/6 Maxim cannot assume respoibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licees are implied. Maxim reserves the right to change the circuitry and specificatio without notice at any time. Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.