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L9779WD 数据表(PDF) 44 Page - STMicroelectronics |
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L9779WD 数据表(HTML) 44 Page - STMicroelectronics |
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44 / 170 page  Functional description L9779WD 44/170 DocID027452 Rev 5 VDD5 SVRVDD5 Supply voltage 5 V rejection Cout =10 µF; 4 Vpp, VB mean 9 V, f = 20 kHz 40 - - dB VDD_OS Max overshoot at switch on Vbat = 18 V Cout = 1 µF Rout =100 Ω -- 5.2 V Max overshoot exiting from cranking Not tested, is guaranteed by design. -- 5.2 V Tdelay_REG - Tested by scan(1) 0.75 1 1.25 ms VDD_UV_low VDD5 under voltage low threshold -4.5 - VDD5 (typ.) -150mV V VDD_UV_hys VDD5 under voltage hysteresis -50 - - mV VDD_UV_high VDD5 under voltage high threshold -4.5 - VDD5 (typ.) -40 mV V VDD_OV_high VDD5 over voltage high threshold - 5.8 - 6.2 V VDD_OV_hys VDD5 over voltage hysteresis -310 - 460 mV VDD_OV_low VDD5 over voltage low threshold - 5.5 - 5.9 V t_VDD5_OV VDD5 overvoltage filter time Tested by scan(1) 75 100 125 µs TfUV_Reset VDD5 under voltage reset filter Tested by scan(1) 25 50 75 µs VDD_G VDD_G External device voltage at pin VDD_G VB = 4.5 V 9.5 - - V Vgs_clamp External N-DMOS Vgs clamp Iclamp = 20 mA - VDD5 +10 -V Ig Driver capability VB = 6-18 V Open loop, VDD5 = VDD_G = 0 V 500 - - µA Ig_rdson Driver capability VB = 4.5 V = VDD_G, open loop, VDD5 = 0 V (charge pump current capability to keep ext MOS in Rdson mode during crank) 160 - - µA - Fcp Oscillator frequency VB = 6-18 V Fcp (typ.) -5% 9.984 Fcp (typ.) +5% MHz 1. All tests by scan parameters have 25% tolerance. Table 15. Linear 5 V regulator electrical characteristics (continued) Pin Symbol Parameter Test condition Min Typ Max Unit |
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