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LM3495 Arkusz danych(PDF) 4 Page - Texas Instruments |
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LM3495 Arkusz danych(HTML) 4 Page - Texas Instruments |
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4 / 35 page  LM3495 SNVS410E – FEBRUARY 2006 – REVISED NOVEMBER 2007 www.ti.com Electrical Characteristics Specifications with standard type are for TJ = 25°C only; limits in boldface type apply over the full Operating Junction Temperature (TJ) range. 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 indicated, VIN = 12V. Symbol Parameter Conditions Min Typ Max Units (Note 4) SYSTEM PARAMETERS -20°C to 85°C 0.594 0.6 0.606 VFB FB Pin Voltage V -40°C to 125°C 0.591 0.6 0.609 Line Regulation 2.9V < VIN < 18V, COMP/SD = 1.5V 0.1 % ΔVFB/VFB Load Regulation 1.1V < COMP/SD <1.8V 0.1 % VIN Rising 2.55 2.6 2.7 VON UVLO Thresholds V VIN Falling 2.26 2.3 2.45 COMP/SD > 0.3V Operating VIN Current 1.8 mA Not switching IQ COMP/SD < 0.3V Quiescent Current 33 µA Shutdown, VIN = 18V IILIM ILIM Pin Source Current 18 20 22 µA VILIM-MAX Maximum Current Limit Sense Voltage 200 mV ISD COMP/SD Pin Pull-up current COMP/SD = 0V 2 2.6 µA VHICCUP COMP/SD Pin Hiccup Threshold 2 V tDELAY Hiccup Delay 16 Cycles tCOOL Cool Down Time Until Restart 4096 Cycles tSS Internal Soft start Time 400 Cycles VOVP Over Voltage Protection Threshold As a % of nominal output voltage 116 125 132 % IFPWM FPWM Pin Pull-up Current FPWM = 0V 4.5 µA VFPWM-LO FPWM Operation Threshold FPWM Voltage Falling 0.9 V SNS = 1.5V RSNS SNS Pin Input Resistance 30 k Ω COMP/SD > 0.3V SNS = 1.5V RDIS SNS Pin Discharge FET RDSON 350 440 530 Ω COMP/SD = 0V GATE DRIVE IBOOST BOOST Pin Leakage Current BOOST - SW = 5.5V 25 nA High-Side FET Driver Pull-up ON RDS1 BOOST - SW = 4.5V 4.5 Ω resistance High-Side FET Driver Pull-down ON RDS2 BOOST - SW = 4.5V 0.9 Ω resistance Low-Side FET Driver Pull-up ON RDS3 VLIN5 = 5.5V 1.4 Ω resistance Low-Side FET Driver Pull-down ON RDS4 VLIN5 = 5.5V 0.7 Ω resistance OSCILLATOR RADJ = 150 kΩ 200 fSW PWM Frequency RADJ = 54.9 kΩ 450 500 550 kHz RADJ = 17.8 kΩ 1500 VSYNC-HI Threshold for SYNC on FREQ Pin SYNC Voltage Rising 1.2 V VSYNC-LO Threshold for SYNC on FREQ Pin SYNC Voltage Falling 0.3 V VO = 1.5V tON-SKIP On Time During Skip Mode 125 ns fSW = 500 kHz VO = 1.5V tON-MAX Adaptive Maximum On-time Limit 750 ns fSW = 500 kHz tOFF-MIN Minimum Off-time 300 ns 4 Submit Documentation Feedback Copyright © 2006–2007, Texas Instruments Incorporated Product Folder Links: LM3495 |
Podobny numer części - LM3495_14 |
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Podobny opis - LM3495_14 |
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