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MAX744AMJA Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX744AMJA Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 16 page 5V, Step-Down, Current-Mode PWM DC-DC Converters _______________________________________________________________________________________ 3 Note 1: The standby current typically settles to 25µA (over temperature) within 2 seconds; however, to decrease test time, the part is guaranteed at a 100µA maximum value. ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 3, V+ = 9V for the MAX730A, V+ = 12V for the MAX738A/MAX744A, ILOAD = 0mA, TA = TMIN to TMAX, unless otherwise noted.) PARAMETER ILOAD = 0mA to 300mA MAX730A MIN TYP MAX Supply Current (includes switch current) ILOAD = 0mA to 750mA UNITS V+ = 9.0V, ILOAD = 300mA MAX738A MIN TYP MAX 4.3 mA MAX744AE ILX = 500mA 6.0 100.0 6.0 100.0 6.0 100.0 µA Standby Current VIH 0.0005 LX On Resistance 2.0 2.0 2.0 MAX744AC/AE 0.5 VIL MAX744A MIN TYP MAX 0.25 0.25 0.25 V 0.5 0.0005 Shutdown Input Threshold %/mA Shutdown Input Leakage Current V+ = 12V, ILOAD = 750mA Load Regulation 0.0005 SHDN = 0V (Note 1) 0.5 1.7 3.0 1.7 3.0 1.7 3.0 159.0 185.0 212.5 Ω MAX744AC/AE 1.2 2.5 V+ = 12V, LX = 0V MAX744AM 1.0 3.0 1.0 1.0 V+ = 6.0V to 9.0V MAX744AC/AE 3.0 1.0 µA Reference Drift 1.0 1.0 MAX744AM µA 3.5 1.5 MAX744AM V+ = 9.0V to 12.0V MAX744AC 4.0 50 50 LX Leakage Current 1.5 87 1.5 CONDITIONS A Short-Circuit Current V+ rising 159.0 216.5 5.7 6.0 5.7 6.0 4.7 5.2 V+ falling 5.0 5.7 V kHz Undervoltage Lockout 90 87 90 % Efficiency 92 V+ = 6.0V to 16.0V V+ = 12V, TA = +25°C Reference Voltage 1.15 1.23 1.30 1.15 1.23 1.30 1.15 1.23 1.30 V 50 130 160 190 130 170 210 ppm/°C Oscillator Frequency 7500 7500 7500 Ω Compensation Pin Impedance 4.5 V+ = 12.0V to 16.0V MAX744AM |
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