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A5970D Datasheet(PDF) 5 Page - STMicroelectronics |
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A5970D Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 13 page A5970D 5/13 3 Electrical characteristics Table 4. Electrical characteristics (TJ=-40 to 85°C, VCC = 12V, unless otherwise specified) Symbol Parameter Test condition Min Typ Max Unit VCC Operating input voltage range V0=1.235V; I0=1A 4.4 36 V RDS(on) Mosfet on resistance 0.250 0.5 Ω IL Maximum limiting current VCC=5V; 1.5 1.87 2.25 A fSW Switching frequency 212 250 280 kHz Duty cycle 0 100 % Dynamic characteristics (see test circuit). V5 Voltage feedback 4.4V<VCC<36V, 20mA<I0<2A 1.198 1.235 1.272 V η Efficiency V0=5V, VCC=12V 90 % DC characteristics Iqop Total operating quiescent current 35 mA Iq Quiescent current Duty ycle=0; VFB=1.5V 2.5 mA Iqst-by Total stand-by quiescent current Vinh > 2.2V 50 100 µA VCC=36V; Vinh > 2.2V 80 150 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 190 300 µA Io sink Sink output current VCOMP = 1.9V; VFB = 1.5V 11.5 mA Ib Source bias current 2.5 4 µA DC open loop gain RL= 50 65 dB gm Transconductance ICOMP = -0.1mA to 0.1mA; VCOMP = 1.9V 2.3 mS ∞ |
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