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LM2726 Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM2726 Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 9 page Electrical Characteristics LM2725 (Continued) VCC = CBOOT = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T A =T J = +25˚C. Limits appearing in boldface type apply over the entire operating temperature range. Symbol Parameter Condition Min Typ Max Units LOGIC V IH_EN EN Pin High Input 2.4 V V IL_EN EN Pin Low Input 0.8 V I leak_EN EN Pin Leakage Current EN = VCC = 5V −2 2 µA VCC = 5V, EN = 0V −2 2 t on_min Minimum Positive Input Pulse Width (Note 4) 55 ns t off_min Minimum Negative Input Pulse Width (Note 5) 55 V IH_PWM PWM_IN High Level Input Voltage When PWM_IN pin goes high from 0V 2.4 V V IL_PWM PWM_IN Low Level Input Voltage When PWM_IN pin goes low from 5V 0.8 Electrical Characteristics LM2726 VCC = CBOOT = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T A =T J = +25˚C. Limits appearing in boldface type apply over the entire operating temperature range. Symbol Parameter Condition Min Typ Max Units POWER SUPPLY I q_op Operating Quiescent Current PWM_IN = 0V 185 250 µA I q_sd Shutdown Quiescent Current EN = 0V, PWM_IN = 0V 0.5 15 µA TOP DRIVER Peak Pull-Up Current Test Circuit 1, V bias = 5V, R = 0.1 Ω 3.0 A Pull-Up Rds_on I CBOOT =IHG = 1.0A 1.2 Ω Peak Pull-down Current Test Circuit 2, V bias = 5V, R = 0.1 Ω −3.2 A Pull-down Rds_on I SW =IHG = 1.0A 0.5 Ω t 4 Rise Time Timing Diagram, C LOAD = 3.3nF 17 ns t 6 Fall Time 12 ns t 3 Pull-Up Dead Time Timing Diagram 19 ns t 5 Pull-Down Delay Timing Diagram, from PWM_IN from Falling Edge 27 ns BOTTOM DRIVER Peak Pull-Up Current Test Circuit 3, V bias = 5V, R = 0.1 Ω 3.2 A Pull-up Rds_on I VCC =ILG = 1.0A 1.1 Ω Peak Pull-down Current Test Circuit 4, V bias = 5V, R = 0.1 Ω −3.2 A Pull-down Rds_on I GND =ILG = 1.0A 0.6 Ω t 8 Rise Time Timing Diagram, C LOAD = 3.3nF 17 ns t 2 Fall Time 14 ns t 7 Pull-up Dead Time Timing Diagram 12 ns www.national.com 4 |
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