Datenblatt-Suchmaschine für elektronische Bauteile |
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LM1572 Datenblatt(PDF) 5 Page - National Semiconductor (TI) |
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LM1572 Datenblatt(HTML) 5 Page - National Semiconductor (TI) |
5 / 17 page Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) 2kV Input Voltage 17V SD Pin Voltage 7V FB Pin Voltage (All Options) 7V Storage Temp. Range −65˚C to 150˚C Junction Temperature 150˚C Operating Ratings Supply Voltage (V IN) (Note 3) 8.5V to 16V Junction Temperature Range −40˚C to +125˚C Package Thermal Resistance (TSSOP-16) (Note 4) 130˚C/W Electrical Characteristics Unless otherwise specified, all limits are guaranteed for T A = 25˚C, VIN = 15V, VCOMP = 1.5V, VSD = 5V, ILOAD = 0A, unless otherwise noted. Boldface apply over the temperature extremes. ’V FB low (high)’ is 0.95 (1.05) times the nominal value at regulation. Symbol Parameter Conditions Min (Note 5) Typ (Note 6) Max (Note 5) Units V FB_ADJ Voltage on Feedback pin (Adjustable version in regulation) 2.37 2.35 2.42 2.49 2.5 V V FB_5 Voltage on Feedback pin (Fixed 5V version in regulation) 4.85 4.8 5.0 5.15 5.2 V V FB_3.3 Voltage on Feedback pin (Fixed 3.3V version in regulation) 3.22 3.16 3.3 3.4 3.44 V ∆V FB/VIN Feedback Voltage Line Regulation V IN = 8.5V to VIN = 16V −0.05 0 0.05 %/V I FB_REG Feedback Pin Bias Current (Adjustable Part) V FB at regulation 0 0.5 1.5 µA AV ERROR Error Amplifier Voltage Gain (Note 7) 350 gm EA Error Amplifier Transconductance (Note 7) 1100 800 2000 2700 3200 µMho gm COMP_SW Comp Pin to Switch Current Transconductance 2 A/V I EA_SOURCE Error Amplifier Source Current V FB low 50 200 300 µA I EA_SINK Error Amplifier Sink Current V FB high 2.4 mA V COMP_TH Comp Pin Switching Threshold Duty Cycle = 0 0.9 V V COMP_LIM Comp Pin High Clamp 2 V I CLIM Switch Current Limit V BOOT =VSW + 5V, Comp Open, V FB low D ≤ 0.5 2.0 2.7 3.2 A D = 0.8 1.75 2.4 3 R DS Switch ON Resistance I SW = 1.5A, VBOOT =VIN + 5V 0.15 0.4 0.5 Ω D MAX Maximum Duty Cycle (Note 8) Comp Open, V FB low 86 94 % f SW Switch Frequency V FB low, VCOMP = 1V, Full Temp. Range 400 500 570 kHz -20˚C ≤ T J ≤ 125˚C 440 560 f REG Switch Frequency Line Regulation V IN = 8.5V and V IN = 16V,VFB low, VCOMP =1V 0.01 %/V ∆f FOLDBACK Foldback Frequency shift (Adjustable part) V FB = 0.8V, VCOMP = 1V 20 90 160 kHz www.national.com 5 |
Ähnliche Teilenummer - LM1572 |
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Ähnliche Beschreibung - LM1572 |
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