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MIC21LV32 Datasheet(PDF) 7 Page - Microchip Technology |
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MIC21LV32 Datasheet(HTML) 7 Page - Microchip Technology |
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7 / 50 page  2021 Microchip Technology Inc. DS20006513A-page 7 MIC21LV32 On Timer Nominal Switching Frequency per Phase fSWNOM_PH 450 500 550 kHz VIN = 12V, VOUTS = 5V, RFREQ = 40.2 kΩ Minimum Switching Frequency per Phase fSWMIN_PH —100 — kHz VIN = 12V, VOUTS = 5V, RFREQ = 200 kΩ Maximum Switching Frequency per Phase fSWMAX_PH —800 — kHz VIN = 12V, VOUTS = 5V, RFREQ = 25.5 kΩ Minimum On-Time TONMIN — 60 — ns Measured in application (Note 2) Minimum Off-Time TOFFMIN —360 — ns VFBS = 0V Maximum Duty Cycle DMAX —85 — % fSW = 400 kHz per phase (Note 4) Minimum Duty Cycle DMIN —0 — % VFBS = +1V Current Limit ILIM Source Current ICL 8.64 9.6 10.56 µA ILIM Source Current Temperature Coefficient TCICL — 0 — ppm/°C Nominal Current Limit Threshold Voltage per Phase VILIM_TH 142 156 174 mV RILIM = 60.4 kΩ, RILIM = 105 kΩ, RILIM = 21 kΩ —47 — mV —250 — mV Negative Current Limit Threshold Voltage VILIM_NTH 60 75 90 mV RILIM = 60.4 kΩ Current Sharing Amplifier Current Sense Amplifier Input Offset VIOS -2.25 0 +2.25 mV VCSN1 = VCSN2 = 0V, VFBS = 0.59V (Note 3) CSH Operating Point VCSH_OP 1.154 1.19 1.226 VVCSN1 = VCSN2 = VCSP1 = VCSP2 = 0V Current Sense Amplifier(s) Gain GCSA — 8 — V/V As reflected on VCSH pin and DROOP pin Current Sense Input Voltage Range VCS -120 — +120 mV -40ºC ≤ TJ ≤ +125ºC Phase to Phase Current Balance ΔIPH — 5 — % Using equal sense resistors on the bottom, equal inductances, VOUT = 5V, fSW = 500 kHz, VIN = 12V, VCSP1 – VCSN1=-120 mV, VCSP2 – VCSN2=-120mV MIC21LV32 to MIC21LV32 Current Balance ΔIPH_DEV — 8 — % In stacking applications ELECTRICAL CHARACTERISTICS(1) (CONTINUED) Electrical Characteristics: VIN = 12V; VOUT = 1.2V; fSW = 500 kHz/phase; VBST – VSW =5V; TA = +25°C, unless noted. Boldface values indicate -40°C ≤ TJ ≤ +125°C. Parameters Symbol Min. Typ. Max. Units Conditions Note 1: Specification for packaged product only. 2: Ensured by design and characterization. Not production tested. 3: Measured in Test mode. 4: The maximum duty cycle is limited by the fixed mandatory off-time of typically 360 ns. 5: Power dissipation at 36V input does not allow the measurement at higher VDD current levels. The bolded Min. and Max. Characteristics specify 125°C as the maximum junction temperature, not the maximum ambient temperature. Measurements can be done at a higher current and higher input voltage in a pulsed way to avoid heating the junction over 125°C. |
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