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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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LM5122ZPWPR Scheda tecnica(PDF) 7 Page - Texas Instruments |
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LM5122ZPWPR Scheda tecnica(HTML) 7 Page - Texas Instruments |
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7 / 51 page  7 LM5122, LM5122-Q1 www.ti.com SNVS954G – FEBRUARY 2013 – REVISED MAY 2016 Product Folder Links: LM5122 LM5122-Q1 Submit Documentation Feedback Copyright © 2013–2016, Texas Instruments Incorporated 6.6 Electrical Characteristics Unless otherwise specified, these specifications apply for –40°C ≤ TJ ≤ +125°C, VVIN = 12 V, VVCC = 8.3 V, RT = 20 kΩ, no load on LO and HO. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIN SUPPLY ISHUTDOWN VIN shutdown current VUVLO = 0 V 9 17 µA IBIAS VIN operating current (exclude the current into RT resistor) VUVLO = 2 V, non-switching 4 5 mA VCC REGULATOR VCC(REG) VCC regulation No load 6.9 7.6 8.3 V VCC dropout (VIN to VCC) VVIN = 4.5 V, no external load 0.25 V VVIN = 4.5 V, IVCC = 25 mA 0.28 0.5 V VCC sourcing current limit VVCC = 0 V 50 62 mA IVCC VCC operating current (exclude the current into RT resistor) VVCC = 8.3 V 3.5 5 mA VVCC = 12 V 4.5 8 mA VCC undervoltage threshold VCC rising, VVIN = 4.5 V 3.9 4.0 4.1 V VCC falling, VVIN = 4.5 V 3.7 V VCC undervoltage hysteresis 0.385 V UNDERVOLTAGE LOCKOUT UVLO threshold UVLO rising 1.17 1.20 1.23 V UVLO hysteresis current VUVLO = 1.4 V 7 10 13 µA UVLO standby enable threshold UVLO rising 0.3 0.4 0.5 V UVLO standby enable hysteresis 0.1 0.125 V MODE Diode emulation mode threshold MODE rising 1.20 1.24 1.28 V Diode emulation mode hysteresis 0.1 V Default MODE voltage 145 155 170 mV Default skip cycle threshold COMP rising, measured at COMP 1.290 V COMP falling, measured at COMP 1.245 V Skip cycle hysteresis Measured at COMP 40 mV ERROR AMPLIFIER VREF FB reference voltage Measured at FB, VFB= VCOMP 1.188 1.200 1.212 V FB input bias current VFB= VREF 5 nA VOH COMP output high voltage ISOURCE = 2 mA, VVCC = 4.5 V 2.75 V ISOURCE = 2 mA, VVCC = 12 V 3.40 V VOL COMP output low voltage ISINK = 2 mA 0.25 V AOL DC gain 80 dB fBW Unity gain bandwidth 3 MHz Slave mode threshold FB rising 2.7 3.4 V OSCILLATOR fSW1 Switching frequency 1 RT = 20 kΩ 400 450 500 kHz fSW2 Switching frequency 2 RT = 10 kΩ 775 875 975 kHz RT output voltage 1.2 V RT sync rising threshold RT rising 2.5 2.9 V RT sync falling threshold RT falling 1.6 2.0 V Minimum sync pulse width 100 ns SYNCOUT SYNCOUT high-state voltage ISYNCOUT = –1 mA 3.3 4.3 V SYNCOUT low-state voltage ISYNCOUT = 1 mA 0.15 0.25 V |
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