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LM3822 Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LM3822 Datasheet(HTML) 3 Page - National Semiconductor (TI) |
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3 / 12 page  Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Absolute Maximum Supply Voltage 5.5V Power Dissipation (Note 2) ESD Susceptibility (Note 3) 1.5 kV Sense Current (peak, for 200 msec) (Note 4) 10A Sink Current for PWM pin 1mA Maximum Junction Temperature 150˚C Storage Temperature −65˚C to +150˚C Lead Temperature (Soldering, 10 sec) 260˚C Operating Ratings (Note 1) Input Voltage 2.0V to 5.25V Sense Current (continuous) (Note 4) 5A Junction Temperature Range −40˚C to +85˚C Electrical Characteristics Typical numbers are at 25˚C and represent the most likely parametric norm. Specifications in standard type face are for T J = 25˚C and those with boldface type apply over full operating temperature ranges. LM3822-1.0 SENSE+V DD = 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF. Symbol Parameter Conditions Typ (Note 5) Limit (Note 6) Units I ACC Average Current Accuracy (Note 7) 1.0A current 1.0 A 0.98 / 0.96 A (min) 1.02 / 1.04 A (max) e n Effective Output Noise (rms) 2 mA LM3822-2.0 SENSE+V DD = 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF. Symbol Parameter Conditions Typ (Note 5) Limit (Note 6) Units I ACC Average Current Accuracy (Note 7) 2.0A current (Note 8) 2.0 A 1.94 / 1.90 A (min) 2.06 / 2.10 A (max) e n Effective Output Noise (rms) 6 mA Common Device Parameters Unless otherwise specified, V DD = 3.6V for the following specifications. Supply bypass capacitor is 1 µF and filter capacitor is 0.1 µF. Symbol Parameter Conditions Typ (Note 5) Limit (Note 6) Units I Q1 Quiescent Current Normal Mode, SD = high 95 µA 150 µA (max) I Q2 Quiescent Current Shutdown Mode, SD = low 1.8 µA 10 µA (max) D RES PWM Resolution 0.1 % t S Sampling Time 50 ms 40 ms (min) 80 ms (max) f P Frequency of PWM Waveform 20 Hz 12.5 Hz (min) 25 Hz (max) V TH Threshold High Level for SD 1.3 V 1.8 V (min) www.national.com 3 |
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