LM2991T National Semiconductor, LM2991T Datasheet
LM2991T
Specifications of LM2991T
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LM2991T Summary of contents
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... Must be at least a 10 μF aluminum electrolytic μF solid tantalum to maintain stability. May be increased without bound to maintain regulation during transients. Locate the capacitor as close as possible to the regulator. The equivalent series resistance (ESR) is critical, and should be less than 10Ω over the same operating temperature range as the regulator. © 2011 National Semiconductor Corporation LM2991 Features ■ ...
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... TO-263 LM2991T 5-Pin TO-220 www.national.com 1126009 Front View TO-220, 5-Lead, Straight See NS Package Number T05A 1126011 Top View TO263, 5-Lead, Surface-Mount See NS Package TS5B NSC Package Package Marking TS5B TS5B T05A 2 Supplied As LM2991S Rail of 45 LM2991S Reel of 500 LM2991T Rail of 45 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Input Voltage ESD Susceptibility (Note 2) Power Dissipation (Note 3) Storage Temperature Range Lead Temperature (Soldering, 10 sec.) Electrical Characteristics = 47 μ 2.7 kΩ −10V − ...
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Typical Performance Characteristics Dropout Voltage Output Voltage Quiescent Current www.national.com Normalized Output Voltage 1126013 Output Noise Voltage 1126015 Maximum Output Current 1126017 4 1126014 1126016 1126018 ...
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Line Transient Response 1126019 Maximum Output Current 1126021 Output Impedance 1126023 Load Transient Response Ripple Rejection ON /OFF Control Voltage 5 1126020 1126022 1126024 www.national.com ...
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Adjust Pin Current Maximum Power Dissipation (TO-220) www.national.com Low Voltage Behavior 1126025 Maximum Power Dissipation (TO-263) (See Note 3) 1126027 6 1126026 1126028 ...
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Application Hints EXTERNAL CAPACITORS Like any low-dropout regulator, external capacitors are re- quired to stabilize the control loop. These capacitors must be correctly selected for proper performance. INPUT CAPACITOR An input capacitor is required if the regulator is located more ...
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Typical Applications www.national.com FIGURE 2. Fully Isolated Post-Switcher Regulator FIGURE 3. Adjustable Current Sink 8 1126006 1126010 ...
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Equivalent Schematic 9 www.national.com ...
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... Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 5-Lead T0-220, Straight Leads (T) Order Number LM2991T NS Package Number T05A TO-263 5-Lead Plastic Surface Mount Package Ordering Number LM2991S NS Package Number TS5B 10 ...
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Notes 11 www.national.com ...
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