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LM3488 Arkusz danych(PDF) 3 Page - National Semiconductor (TI) |
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LM3488 Arkusz danych(HTML) 3 Page - National Semiconductor (TI) |
3 / 24 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. Input Voltage 45V FB Pin Voltage -0.4V < V FB < 7V FA/SYNC/SD Pin Voltage -0.4V < V FA/SYNC/SD < 7V Peak Driver Output Current (<10µs) 1.0A Power Dissipation Internally Limited Storage Temperature Range −65˚C to +150˚C Junction Temperature +150˚C ESD Susceptibilty Human Body Model (Note 2) 2kV Lead Temperature MM Package Vapor Phase (60 sec.) Infared (15 sec.) 215˚C 220˚C DR Pin Voltage −0.4V ≤ VDR ≤ 8V I LIM Pin Voltage 600mV Operating Ratings (Note 1) Supply Voltage 2.97V ≤ V IN ≤ 40V Junction Temperature Range −40˚C ≤ T J ≤ +125˚C Switching Frequency 100kHz ≤ F SW ≤ 1MHz Electrical Characteristics Specifications in Standard type face are for T J = 25˚C, and in bold type face apply over the full Operating Temperature Range. Unless otherwise specified, V IN = 12V, RFA = 40k Ω Symbol Parameter Conditions Typical Limit Units V FB Feedback Voltage V COMP = 1.4V, 2.97 ≤ V IN ≤ 40V 1.26 1.2507/1.24 1.2753/1.28 V V(min) V(max) ∆V LINE Feedback Voltage Line Regulation 2.97 ≤ V IN ≤ 40V 0.001 %/V ∆V LOAD Output Voltage Load Regulation I EAO Source/Sink ±0.5 %/V (max) V UVLO Input Undervoltage Lock-out 2.85 2.97 V V(max) V UV(HYS) Input Undervoltage Lock-out Hysteresis 170 130 210 mV mV (min) mV (max) F nom Nominal Switching Frequency R FA = 40K Ω 400 370 420 kHz kHz(min) kHz(max) R DS1 (ON) Driver Switch On Resistance (top) I DR = 0.2A, VIN=5V 16 Ω R DS2 (ON) Driver Switch On Resistance (bottom) I DR = 0.2A 4.5 Ω V DR (max) Maximum Drive Voltage Swing(Note 6) V IN < 7.2V V IN V V IN ≥ 7.2V 7.2 D max Maximum Duty Cycle(Note 7) 100 % T min (on) Minimum On Time 325 230 550 nsec nsec(min) nsec(max) I SUPPLY Supply Current (switching) (Note 9) 2.0 2.6 mA mA (max) I Q Quiescent Current in Shutdown Mode V FA/SYNC/SD = 5V(Note 10), V IN =5V 5 7 µA µA (max) V SENSE Current Sense Threshold Voltage V IN = 5V 165 140/ 135 195/ 200 mV mV (min) mV (max) www.national.com 3 |
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