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L5973ADTR Datasheet(PDF) 3 Page - STMicroelectronics |
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L5973ADTR Datasheet(HTML) 3 Page - STMicroelectronics |
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3 / 14 page  3/14 L5973AD Table 5. Electrical Characteristics (Tj = 25°C, VCC = 12V, unless otherwise specified.) Note: 1. Guaranteed by design Symbol Parameter Test Condition Min. Typ. Max. Unit VCC Operating input voltage range Vo = 1.235V; Io = 2A 4.4 36 V RDSON Mosfet on Resistance 0.250 0.5 Ω Il Maximum limiting current VCC = 4.4V to 36V 2 2.3 A fs Switching frequency 500 KHz Duty cycle 0 100 % DYNAMIC CHARACTERISTICS (see test circuit ). V5 Voltage feedback 4.4V < VCC < 36V 1.220 1.235 1.25 V η Efficiency VO = 5V, VCC = 12V 90 % DC CHARACTERISTICS Iqop Total Operating Quiescent Current 5 7 mA Iq Quiescent current Duty Cycle = 0; VFB = 1.5V 2.7 mA Iqst-by Total stand-by quiescent current Vinh > 2.2V 50 100 µA INHIBIT INH Threshold Voltage Device ON 0.8 V Device OFF 2.2 V ERROR AMPLIFIER VOH High level output voltage VFB = 1V 3.5 V VOL Low level output voltage VFB = 1.5V 0.4 V Io source Source output current VCOMP = 1.9V; VFB = 1V 200 300 µA Io sink Sink output current VCOMP = 1.9V; VFB = 1.5V 1 1.5 mA Ib Source bias current 2.5 4 µA DC open loop gain RL = ∞ 50 57 dB gm Transconductance Icomp = -0.1mA to 0.1mA VCOMP = 1.9V 2.3 mS SYNC FUNCTION High Input Voltage VCC = 4.4V to 36V 2.5 VREF V Low Input Voltage VCC = 4.4V to 36V 0.74 V Slave Sink Current Vsync = 0.74V (1) Vsync = 2.33V 0.11 0.21 0.25 0.45 mA mA Master Output Amplitude Isource = 3mA 2.75 3 V Output Pulse Width no load, Vsync = 1.65V 0.20 0.35 µs REFERENCE SECTION Reference Voltage 3.234 3.3 3.366 V IREF = 0 to 5mA VCC = 4.4V to 36V 3.2 3.3 3.399 V Line Regulation IREF = 0mA VCC = 4.4V to 36V 510 mV Load Regulation IREF = 0 to 5mA 8 15 mV Short Circuit Current 10 18 30 mA |
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