MIC4103/4104 100V Half-Bridge MOSFET Drivers with 3A/2A Sinking/Sourcing Current General Description Features The MIC4103 and MIC4104 are high-frequency, 100V half- Asymmetrical, low impedance outputs drive 1000pF bridge MOSFET drivers with faster turn-off characteristics load with 10ns rise times and 6ns fall times than the MIC4100 and MIC4101 drivers. They feature fast Bootstrap supply maximum voltage to 118V DC 24ns propagation delay times and 6ns driver fall times. Supply voltage up to 16V The low-side and high-side gate drivers are independently Drives high and low-side N-Channel MOSFETs with controlled and matched to within 3ns (typical). The independent inputs MIC4103 has CMOS input thresholds and the MIC4104 has TTL input thresholds. The MIC4103/4 include a high- CMOS input thresholds (MIC4103) voltage internal diode that charges the high-side gate drive TTL input thresholds (MIC4104) bootstrap capacitor. On-chip bootstrap diode A robust, high-speed, and low-power level shifter provides Fast 24ns propagation times clean level transitions to the high-side output. The robust Low power consumption operation of the MIC4103/4 ensures the outputs are not Supply undervoltage protection affected by supply glitches, HS ringing below ground, or Typical 2.5 pull-up and 1.25 pull-down output driver HS slewing with high-speed voltage transitions. resistance Undervoltage protection is provided on both the low-side and high-side drivers. 40C to +125C junction temperature range The MIC4103 and MIC4104 are available in an 8-pin SOIC Applications package with an operating junction temperature range of High-voltage buck converters 40C to +125C. Full- and half-bridge power topologies Datasheets and support documentation are available on Active clamp forward converter Micrels web site at: www.micrel.com. Two switch forward topologies Interface to digital controllers Typical Application 100V Buck Regulator Solution Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. MIC4103/4104 Ordering Information Part Number Input Junction Temperature Range Package MIC4103YM CMOS 40 to +125C 8-Pin SOIC MIC4104YM TTL 40 to +125C 8-Pin SOIC Pin Configuration 8-Pin SOIC (M) (Top View) Pin Description Pin Number Pin Name Pin Function Positive Supply to lower gate drivers. Decouple this pin to VSS (Pin 7). Bootstrap diode connected 1 VDD to HB (pin 2). High-Side Bootstrap supply. External bootstrap capacitor is required. Connect positive side of 2 HB bootstrap capacitor to this pin. Bootstrap diode is on-chip. 3 HO High-Side Output. Connect to gate of High-Side power MOSFET. High-Side Source connection. Connect to source of High-Side power MOSFET. Connect negative 4 HS side of bootstrap capacitor to this pin. 5 HI High-Side input. 6 LI Low-Side input. 7 VSS Chip negative supply, generally will be ground. 8 LO Low-Side Output. Connect to gate of Low-Side power MOSFET. November 12, 2014 Revision 3.0 2
