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LM26420-Q0 Datasheet(PDF) 7 Page - Texas Instruments |
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LM26420-Q0 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 47 page 7 LM26420, LM26420-Q0, LM26420-Q1 www.ti.com SNVS579K – FEBRUARY 2009 – REVISED APRIL 2016 Product Folder Links: LM26420 LM26420-Q0 LM26420-Q1 Submit Documentation Feedback Copyright © 2009–2016, Texas Instruments Incorporated 6.6 Electrical Characteristics Per Buck Over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VFB Feedback Voltage 0.788 0.8 0.812 V ΔVFB/VIN Feedback Voltage Line Regulation VIN = 3 V to 5.5 V 0.05 %/V IB Feedback Input Bias Current 0.4 100 nA UVLO Undervoltage Lockout VIN Rising 2.628 2.9 V VIN Falling 2 2.3 V UVLO Hysteresis 330 mV FSW Switching Frequency LM26420-X 1.85 2.2 2.65 MHz LM26420-Y 0.4 0.55 0.7 FFB Frequency Fold-back LM26420-X 300 kHz LM26420-Y 150 DMAX Maximum Duty Cycle LM26420-X 86% 91.5% LM26420-Y 90% 98% RDSON_TOP TOP Switch On Resistance WQFN-16 Package 75 135 m Ω HTSSOP-20 Package 70 135 RDSON_BOT BOTTOM Switch On Resistance WQFN-16 Package 55 100 m Ω TSSOP-20 Package 45 80 ICL_TOP TOP Switch Current Limit VIN = 3.3 V 2.4 3.3 A ICL_BOT BOTTOM Switch Reverse Current Limit VIN = 3.3 V 0.4 0.75 A ΔΦ Phase Shift Between SW1 and SW2 160 180 200 ° VEN_TH Enable Threshold Voltage 0.97 1.04 1.12 V Enable Threshold Hysteresis 0.15 ISW_TOP Switch Leakage -0.7 µA IEN Enable Pin Current Sink/Source 5 nA VPG-TH-U Upper Power Good Threshold FB Pin Voltage Rising 848 925 1,008 mV Upper Power Good Hysteresis 40 mV VPG-TH-L Lower Power Good Threshold FB Pin Voltage Rising 656 710 791 mV Lower Power Good Hysteresis 40 mV IQVINC VINC Quiescent Current (non- switching) with both outputs on LM26420X/Y VFB = 0.9 V 3.3 5.0 mA VINC Quiescent Current (switching) with both outputs on LM26420X/Y VFB = 0.7 V 4.7 6.2 VINC Quiescent Current (shutdown) All Options VEN = 0 V 0.05 µA IQVIND VIND Quiescent Current (non- switching) LM26420X/Y VFB = 0.9 V 0.9 1.5 mA VIND Quiescent Current (switching) LM26420X VFB = 0.7 V 11 15 LM26420Q0X VFB = 0.7 V 11 18 LM26420Y VFB = 0.7 V 3.7 7.5 VIND Quiescent Current (shutdown) All Options VEN = 0 V 0.1 µA TSD Thermal Shutdown Temperature 165 °C |
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