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LM3485MM Datasheet(PDF) 5 Page - Texas Instruments |
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LM3485MM Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 28 page  LM3485 www.ti.com SNVS178H – JANUARY 2002 – REVISED DECEMBER 2015 6.5 Electrical Characteristics Specifications are for TJ = 25°C. Unless otherwise specified, VIN = 12 V, VISNS = VIN − 1 V, and VADJ = VIN − 1.1 V. Data sheet minimum and maximum specification limits are specified by design, test, or statistical analysis. PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT FB = 1.5 V (Not Switching) 250 Quiescent current at ground IQ µA pin (TJ = −40°C to 125°C) 400 1.226 1.242 1.258 VFB Feedback voltage(3) V (TJ = −40°C to 125°C) 1.217 1.267 10 15 VHYST Comparator hysteresis mV (TJ = −40°C to 125°C) 14 20 RADJ = 20 kΩ 110 Current limit comparator trip VCL (4) mV voltage RADJ = 160 kΩ 880 VFB = 1.5 V 0 Current limit comparator VCL_OFFSET mV offset (TJ = −40°C to 125°C) −20 20 VFB = 1.5 V 5.5 Current limit ADJ current ICL_ADJ µA source (TJ = −40°C to 125°C) 3.0 7.0 VADJ = 11.5 V 9 Current limit one shot off TONMIN_CLCL VISNS = 11.0 V µs time (TJ = −40°C to 125°C) 6 14 VFB = 1.0 V Source 5.5 ISOURCE = 100 mA RPGATE Driver resistance Ω Sink 8.5 ISink = 100 mA Source VIN = 7 V, 0.44 PGATE = 3.5 V IPGATE Driver output current A Sink VIN = 7 V, 0.32 PGATE = 3.5 V VFB = 1.0 V 300 IFB FB pin bias current(5) nA (TJ = −40°C to 125°C) 750 Minimum on time in normal VISNS = VADJ + 0.1 V TONMIN_NOR 100 ns operation Cload on OUT = 1000 pF (6) VISNS = VADJ + 0.1 V Minimum on time in current T VFB = 1.0 V 175 ns limit Cload on OUT = 1000 pF (6) Feedback voltage line %VFB/ΔVIN 4.5 ≤ VIN ≤ 35 V 0.010% regulation (1) All limits are at room temperature unless otherwise specified. All room temperature limits are 100% tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (2) Typical numbers are at 25°C and represent the most likely norm. (3) The VFB is the trip voltage at the FB pin when PGATE switches from high to low. (4) VCL = ICL_ADJ × RADJ (5) Bias current flows out from the FB pin. (6) A 1000-pF capacitor is connected between VIN and PGATE. Copyright © 2002–2015, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3485 |
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