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MIC2103 数据表(PDF) 4 Page - Microchip Technology |
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MIC2103 数据表(HTML) 4 Page - Microchip Technology |
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4 / 42 page  MIC2103/4 DS20005899A-page 4 2017 Microchip Technology Inc. TABLE 1-1: ELECTRICAL CHARACTERISTICS Electrical Characteristics: VIN = 48V, VOUT = 5V, VBST – VSW = 5V; TA = +25°C, unless noted. Bold values indicate –40°C ≤ TJ ≤ +125°C. Note 1 Parameter Symbol Min. Typ. Max. Units Conditions Power Supply Input Input Voltage Range VIN 4.5 — 75 V Note 2 Quiescent Supply Current IQ —400 750 µA MIC2103, VFB = 1.5V —2.1 3 mA MIC2104, VFB = 1.5V Shutdown Supply Current ISHDN —0.1 10 µA SW unconnected, VEN = 0V VDD Supply VDD Output Voltage VDD 4.8 5.2 5.4 VVIN = 7V to 75V, IDD = 10 mA VDD UVLO Upper Threshold VDDUV,R 3.8 4.2 4.6 VVDD rising VDD UVLO Hysteresis ∆VDDUV —400 — mV — Load Regulation ∆VDD,LOAD 0.6 2 3.6 % IDD = 0 mA to 40 mA Reference Feedback Reference Voltage VFB 0.792 0.8 0.808 V TJ = 25°C (±1.0%) 0.784 0.8 0.816 –40°C ≤ TJ ≤ +125°C (±2%) FB Bias Current IFB —5 500 nA VFB = 0.8V Enable Control EN Logic Level High VEN(HI) 1.8 —— V — EN Logic Level Low VEN(LO) —— 0.6 V— EN Hysteresis VEN(HYS) —200 — mV — EN Bias Current IEN —23 40 µA VEN = 48V Oscillator Switching Frequency fSW 400 600 750 kHz VFREQ = VIN —300 — VFREQ = 50%VIN Maximum Duty Cycle DMAX —85— % — Minimum Duty Cycle DMIN —0— % VFB > 0.8V Minimum Off-Time tOFF(MIN) 140 200 260 ns — Soft-Start Soft-Start Time tSS —5— ms — Short-Circuit Protection Current-Limit Threshold VCL –30 –14 0 mV VFB = 0.79V Short-Circuit Threshold VCL(FB) –23 –7 9 mV VFB = 0V Current-Limit Source Current ICL 60 80 100 µA VFB = 0.79V Short-Circuit Source Current ICL(FB) 27 36 47 µA VFB = 0V FET Drivers DH, DL Output Low Voltage VLO —— 0.1 VISINK = 10 mA DH, DL Output High Voltage VHI VPVDD – 0.1V or VBST – 0.1V —— V ISOURCE = 10 mA DH On-Resistance, High State RON(DHH) —2.1 3.3 Ω — DH On-Resistance, Low State RON(DHL) —1.8 3.3 Ω — DL On-Resistance, High State RON(DLH) —1.8 3.3 Ω — |
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