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MIC45404 Datasheet(PDF) 4 Page - Microchip Technology |
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MIC45404 Datasheet(HTML) 4 Page - Microchip Technology |
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4 / 32 page  MIC45404 DS20005478A-page 4 2015 Microchip Technology Inc. ELECTRICAL CHARACTERISTICS(1) Electrical Specifications: unless otherwise specified, VIN = 12V; CVDDA= 2.2 µF, TA = +25°C. Boldface values indicate -40°C TJ +125°C. Parameter Symbol Min. Typ. Max. Units Test Conditions VIN Supply Input Range VIN 4.5 — 19 V Disable Current IVINQ —33 60 µA EN/DLY = 0V Operating Current IVINOp —5.35 8.5 mA EN/DLY > 1.28V, OUTSNS = 1.15 x VOUT(NOM), no switching VDDA 5V Supply Operating Voltage VDDA 4.8 5.1 5.4 V EN/DLY > 0.58V, IVDDA = 0 mA to 10 mA Dropout Operation 3.6 3.75 — V VIN = 4.5V, EN/DLY > 0.58V, IVDDA = 10 mA VDDA Undervoltage Lockout VDDA UVLO Rising UVLO_R 3.1 3.5 3.9 VVDDA Rising, EN/DLY > 1.28V VDDA UVLO Falling UVLO_F 2.87 3.2 3.45 VVDDA Falling, EN/DLY > 1.28V VDDA UVLO Hysteresis UVLO_H — 300 — mV EN/DLY Control LDO Enable Threshold EN_LDO_R — 515 600 mV Turns on VDDA LDO LDO Disable Threshold EN_LDO_F 450 485 — mV Turns off VDDA LDO LDO Threshold Hysteresis EN_LDO_H — 30 — mV EN/DLY Rising Threshold EN_R 1.14 1.21 1.28 V Initiates power stage operation EN/DLY Falling Threshold EN_F — 1.06 — V Stops power stage operation EN/DLY Hysteresis EN_H — 150 — mV EN/DLY Pull-up Current EN_I 1 2 3 µA Switching Frequency Programmable Frequency (High Z) fSZ 360 400 440 kHz FREQ = High Z (open) Programmable Frequency 0 fS0 500 565 630 kHz FREQ= Low (GND) Programmable Frequency 1 fS1 700 790 880 kHz FREQ = High (VDDA) Overcurrent Protection HS Current Limit 0 ILIM_HS0 6.0 7.1 8.1 AILIM = Low (GND) HS Current Limit 1 ILIM_HS1 8.1 9.3 10.3 AILIM = High (VDDA) HS Current Limit High Z ILIM_HSZ 9.3 10.5 11.9 AILIM = High Z (open) Top FET Current Limit Leading-Edge Blanking Time LEB — 108 — ns LS Current Limit 0 ILIM_LS0 3.0 4.6 6.3 AILIM = Low (GND) LS Current Limit 1 ILIM_LS1 4.0 6.2 7.9 AILIM = High (VDDA) LS Current Limit High Z ILIM_LSZ 5.0 6.8 8.6 AILIM = High Z (Open) OC Events Count for Hiccup INHICC_DE —15— Clock Cycles Number of subsequent cycles in current limit before entering hiccup overload protection Hiccup Wait Time tHICC_WAIT —3 x Soft Start Time — Duration of the High Z state on LX before new soft start. Note 1: Specification for packaged product only. |
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