Isolated Transformer Driver for PCMCIA ApplicationsABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC) ...-0.3V to +7V Operating Temperature Range ...-40°C to +85°C Control Input Voltage (SD, FS) ...-0.3V to (VCC + 0.3V) Storage Temperature Range ...-65°C to +160°C Peak Output Switch Current (D1, D2) ..1A Junction Temperature ..+150°C Output Switch Voltage (D1, D2) ...12V Lead Temperature (soldering, 10sec) ...+300°C Average Output Switch Current (D1, D2) ...200mA Continuous Power Dissipation (TA = +70°C) MAX845 SO (derate 5.88mW/°C above +70°C) ...471mW µMAX (derate 4.10mW/°C above +70°C) ..330mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VCC = 5V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETERCONDITIONSMINTYPMAXUNITS Switch On-Resistance D1, D2; 100mA 1.5 4.0 Ω FS = VCC = 4.5V 450 675 900 FS = VCC = 5.5V 550 860 1100 Switch Frequency kHz FS = 0V, VCC = 4.5V 500 FS = 0V, VCC = 5.5V 575 Operating Supply Current (Note 1) No load, SD = 0V, FS = VCC 1.1 5.0 mA Shutdown Supply Current (Note 2) SD = VCC 0.4 µA High 2.4 Shutdown Input Threshold V Low 0.8 Shutdown Input Leakage Current 10 pA High 2.4 FS Input Threshold V Low 0.8 FS = 0V 50 FS Input Current µA FS = VCC 10 Minimum Start-Up Voltage 2.5 2.2 V Note 1: Operating supply current is the current used by the MAX845 only. Load current is not included. Note 2: Shutdown supply current includes output switch leakage currents. 2_______________________________________________________________________________________
