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LM3500 Fiches technique(PDF) 4 Page - Texas Instruments |
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LM3500 Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 25 page LM3500 SNVS231F – MAY 2004 – REVISED APRIL 2007 www.ti.com Electrical Characteristics Specifications in standard type face are for TA = 25°C and those in boldface type apply over the Operating Temperature Range of TA = −10°C to +85°C. Unless otherwise specified VIN =2.7V and specification apply to both LM3500-16 and LM3500-21. Min Typ Max Symbol Parameter Conditions Units (1) (2) (1) IQ Quiescent Current, Device Not FB > 0.54V 0.95 1.2 Switching mA Quiescent Current, Device FB = 0V 1.8 2.5 Switching Shutdown SHDN = 0V 0.1 2 µA VFB Feedback Voltage VIN = 2.7V to 7V 0.47 0.5 0.53 V ΔVFB Feedback Voltage Line VIN = 2.7V to 7V 0.1 0.4 %/V Regulation ICL Switch Current Limit (LM3500- VIN = 2.7V, 275 400 480 16) Duty Cycle = 80% VIN = 3.0V, 255 400 530 Duty Cycle = 70% mA Switch Current Limit (LM3500- VIN = 2.7V, 420 640 770 21) Duty Cycle = 70% VIN = 3.0V, 450 670 800 Duty Cycle = 63% IB FB Pin Bias Current FB = 0.5V (3) 45 200 nA VIN Input Voltage Range 2.7 7.0 V RDSON NMOS Switch RDSON VIN = 2.7V, ISW = 300mA 0.43 Ω PMOS Switch RDSON VOUT = 6V, ISW = 300mA 1.1 2.3 DLimit Duty Cycle Limit (LM3500-16) FB = 0V 80 87 % Duty Cycle Limit (LM3500-21) FB = 0V 85 94 FSW Switching Frequency 0.85 1.0 1.15 MHz ISD SHDN Pin Current (4) SHDN = 5.5V 18 30 SHDN = 2.7V 9 16 µA SHDN = GND 0.1 IL Switch Leakage Current VSW = 15V 0.01 0.5 µA (LM3500-16) Switch Leakage Current VSW = 20V 0.01 2.0 (LM3500-21) UVP Input Undervoltage Lockout ON Threshold 2.4 2.5 2.6 V OFF Threshold 2.3 2.4 2.5 OVP Output Overvoltage Protection ON Threshold 15 15.5 16 (LM3500-16) OFF Threshold 14 14.6 15 V Output Overvoltage Protection ON Threshold 20 20.5 21 (LM3500-21) OFF Threshold 19 19.5 20 IVout VOUT Bias Current (LM3500- VOUT = 15V, SHDN = VIN 260 400 16) µA VOUT Bias Current (LM3500- VOUT = 20V, SHDN = VIN 300 460 21) (1) All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are production tested, guaranteed through statistical analysis or guaranteed by design. All limits at temperature extremes are guaranteed 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) Feedback current flows out of the pin. (4) Current flows into the pin. 4 Submit Documentation Feedback Copyright © 2004–2007, Texas Instruments Incorporated Product Folder Links: LM3500 |
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