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LM3000 Datasheet(PDF) 6 Page - Texas Instruments |
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LM3000 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 41 page  LM3000 SNVS612A – JULY 2009 – REVISED JULY 2009 www.ti.com Electrical Characteristics Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise noted, VIN = 12.0V, IEN1 = IEN2 = 40 µA. Symbol Parameter Condition Min Typ Max Units VFB FB Pin Voltage FB1, FB2 (LM3000A) -20°C to +85°C 0.594 0.6 0.606 V 0.591 0.6 0.609 VFB FB Pin Voltage FB1, FB2 (LM3000) -20°C to +85°C 0.591 0.6 0.609 V 0.588 0.6 0.612 ΔVFB/VFB Line Regulation VDD = VIN = VDR 3.3V < VIN < 5.5, COMP = 1.5V 0.15 % Line Regulation VIN > 6V 6V < VIN < 18.5V, COMP = 1.5V 0.3 % Load Regulation VIN = 12.0V, 1.0V < COMP < 1.4V 0.1 % Iq VIN Operating Current 5 mA ISD VIN Shutdown Current IEN1 , IEN2 < 5 µA 50 µA IEN EN Input Threshold Current IEN Rising 15 35 µA Hysteresis 10 ILIM Source Current ILIM1, ILIM2 VILIM1, VILIM2 = 0V 17 20 23 µA ISS Soft-Start Pull-Up Current VSS = 0.5V 5.5 8.5 11.5 µA VHICCUP COMP Pin Hiccup Thresholds COMP Threshold High 2.85 V Hysteresis 50 mV tDELAY Hiccup Delay 16 Cycles tCOOL Cool-Down Time Until Restart 4096 Cycles VOVP Over-Voltage Protection Threshold As a % of Nominal Output Voltage 110 115 120 % Hysteresis 3 VUVP Under-Voltage Protection Threshold As a % of REF1, REF2 (see Block 85 % Diagram) GATE DRIVE ICB VCB Pin Leakage Current VCB - VSW = 5.5V 250 nA RDS1 Top FET Drive Pull-Up On-Resistance VCB - VSW = 4.5V, VCB - HG = 100 3 Ω mV RDS2 Top FET Drive Pull-Down On-Resistance VCB - VSW = 4.5V, HG - VSW = 100 2 Ω mV RDS3 Bottom FET Drive Pull-Up On-Resistance VDR - PGND = 5V, VDR - LG = 100 2 Ω mV RDS4 Bottom FET Drive Pull-Down On- VDR - PGND = 5V, LG - PGND = 100 1 Ω Resistance mV OSCILLATOR fSW Switching Frequency RFRQ = 100 kΩ 230 kHz RFRQ = 42.2 kΩ 425 500 575 kHz RFRQ = 10 kΩ 1550 kHz VSYNC Threshold for Synchronization at the Rising 2.2 V FREQ/SYNC Pin Falling 0.6 fSYNC SYNC Range 200 1500 kHz tSYNC SYNC Pulse Width 100 ns tSYNC-TRS SYNC Rise/Fall Time 10 ns DMAX Maximum Duty cycle 85 % ERROR AMPLIFIER IFB FB Pin Bias Current FB = 0.6V 20 nA ISOURCE COMP Pin Source Current FB = 0.5V, COMP = 1.0V 80 µA ISINK COMP Pin Sink Current FB = 0.7V, COMP = 0.7V 80 µA 6 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Links: LM3000 |
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