Supertex inc. MD1822 High Speed Four Channel MOSFET Driver with Two Inverting and Two Non-Inverting Outputs Features General Description Mixed inversion MOSFET driver The Supertex MD1822 is a high speed, four channel MOSFET driver designed to drive high voltage P- and N-channel MOSFETs for medical 6.0ns rise and fall time ultrasound applications and other applications requiring a high output 2.0A peak output source/sink current current for a capacitive load. The high-speed input stage of the MD1822 1.8 to 5.0V input CMOS compatible can operate from a 1.8 to 5.0V logic interface with an optimum operating 5.0 to 10V total supply voltage input signal range of 1.8 to 3.3V. An adaptive threshold circuit is used to Smart logic threshold set the level translator switch threshold to the average of the input logic 0 Low jitter design and logic 1 levels. The input logic levels may be ground referenced, even Four matched channels though the driver is putting out bipolar signals. The level translator uses a proprietary circuit, which provides DC coupling together with high-speed Drives two P- and two N-channel MOSFETs operation. Outputs can swing below ground Low inductance, quad flat no-lead package The output stage of the MD1822 has separate power connections High performance, thermally enhanced enabling the output signal L and H levels to be chosen independently from packaging the supply voltages used for the majority of the circuit. As an example, the input logic levels may be 0 and 1.8V, the control logic may be powered by +5.0 and -5.0V, and the output L and H levels may be varied anywhere Applications over the range of -5.0 to +5.0V. The output stage is capable of peak Medical ultrasound imaging currents of up to 2.0A, depending on the supply voltages used and load Piezoelectric transducer drivers capacitance present. The PE pin serves a dual purpose. First, its logic H Non-Destructive Testing (NDT) level is used to compute the threshold voltage level for the channel input PIN diode driver level translators. Second, when PE is low, the outputs are disabled, with the A & C output high and the B & D output low. This assists in properly CCD Clock driver/buffer precharging the AC coupling capacitors that may be used in series in the High speed level translator gate drive circuit of an external PMOS and NMOS transistor pair. Typical Application Circuit +10V +10V +100V 0.1F Supertex 0.47F 0.47F +3.3V MD1822 VDD VH PE 10nF OUTA INA PIN 10nF -100V OUTB INB 3.3V CMOS NIN 0.47F Logic Inputs Supertex HV OUT TC6320 OUTC DMP INC OUTD IND 10nF GND VSS VL 10nF Supertex TC6320 Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com MD1822 Ordering Information 16-Lead QFN 3.00x3.00mm body Device 1.00mm height (max) 0.50mm pitch MD1822 MD1822K6-G -G indicates package is RoHS compliant (Green) Absolute Maximum Ratings Pin Configuration Parameter Value 16 V -V , Logic supply voltage -0.5V to +12.5V DD SS V , Output high supply voltage V - 0.5V to V +0.5V 1 H L DD V , Output low supply voltage V - 0.5V to V +0.5V L SS H V , Low side supply voltage -6.0V to +0.5V SS Logic input levels V - 0.5V to GND +5.5V SS Maximum junction temperature +125C 16-Lead QFN (K6) Storage temperature -65C to 150C (top view) Operating temperature -20C to +85C Product Marking Package power dissipation 2.2W Thermal resistance ( )* 55C/W JA Y = Last Digit of Year Sealed Absolute Maximum Ratings are those values beyond which damage to the device 1822 W = Code for Week Sealed may occur. Functional operation under these conditions is not implied. Continuous L = Lot Number YWLL operation of the device at the absolute rating level may affect device reliability. All = Green Packaging voltages are referenced to device ground. Package may or may not include the following marks: Si or * 1.0oz 4-layer 3x4 PCB 16-Lead QFN (K6) DC Electrical Characteristics (V = V = 10V, V = V = GND = 0V, V = 3.3V, T = 25C) H DD L SS PE A Sym Parameter Min Typ Max Units Conditions V - V Logic supply voltage 4.75 - 11.5 V 4.0V V 11.5V DD SS DD V Low side supply voltage -5.5 - 0 V --- SS V Output high supply voltage V +2.0 - V V --- H SS DD V Output low supply voltage V - V -4.0 V --- L SS DD I V quiescent current - 60 - A DDQ DD No input transitions, PE = 0 I V quiescent current - 2.0 - A HQ H I V quiescent current - 1.0 - mA DDQ DD No input transitions, PE = 1 I V quiescent current - 2.0 - A HQ H I V average current - 4.0 - mA One channel on at 5.0Mhz, DD DD No load I V average current - 10 - mA H H V Input logic voltage high V -0.3 - V V IH PE PE V Input logic voltage low 0 - 0.3 V For logic inputs INA, INB, INC, IL and IND I Input logic current high - 1.0 A IH I Input logic current low - - 1.0 A IL V PE input logic voltage high 1.70 3.30 5.25 V IH V PE input logic voltage low 0 - 0.3 V For logic input PE IL R PE input impedance to GND 100 - - K IN PE Supertex inc. 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 2