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LM2585SX-3.3 Datasheet(PDF) 2 Page - National Semiconductor (TI) |
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LM2585SX-3.3 Datasheet(HTML) 2 Page - National Semiconductor (TI) |
2 / 25 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 −0.4V ≤ V IN ≤ 45V Switch Voltage −0.4V ≤ V SW ≤ 65V Switch Current (Note 2) Internally Limited Compensation Pin Voltage −0.4V ≤ V COMP ≤ 2.4V Feedback Pin Voltage −0.4V ≤ V FB ≤ 2VOUT Storage Temperature Range −65˚C to +150˚C Lead Temperature (Soldering, 10 sec.) 260˚C Maximum Junction Temperature (Note 3) 150˚C Power Dissipation (Note 3) Internally Limited Minimum ESD Rating (C = 100 pF, R = 1.5 k Ω)2 kV Operating Ratings Supply Voltage 4V ≤ V IN ≤ 40V Output Switch Voltage 0V ≤ V SW ≤ 60V Output Switch Current I SW ≤ 3.0A Junction Temperature Range −40˚C ≤ T J ≤ +125˚C Electrical Characteristics LM2585-3.3 Specifications with standard type face are for T J = 25˚C, and those in bold type face apply over full Operating Temperature Range. Unless otherwise specified, V IN = 5V. Symbol Parameters Conditions Typical Min Max Units SYSTEM PARAMETERS Test Circuit of Figure 2 (Note 4) V OUT Output Voltage V IN = 4V to 12V 3.3 3.17/3.14 3.43/3.46 V I LOAD = 0.3A to 1.2A ∆V OUT/ Line Regulation V IN = 4V to 12V 20 50/100 mV ∆V IN I LOAD = 0.3A ∆V OUT/ Load Regulation V IN = 12V 20 50/100 mV ∆I LOAD I LOAD = 0.3A to 1.2A η Efficiency V IN = 5V, ILOAD = 0.3A 76 % UNIQUE DEVICE PARAMETERS (Note 5) V REF Output Reference Measured at Feedback Pin 3.3 3.242/3.234 3.358/3.366 V Voltage V COMP = 1.0V ∆V REF Reference Voltage V IN = 4V to 40V 2.0 mV Line Regulation G M Error Amp I COMP = −30 µA to +30 µA 1.193 0.678 2.259 mmho Transconductance V COMP = 1.0V A VOL Error Amp V COMP = 0.5V to 1.6V 260 151/75 V/V Voltage Gain R COMP = 1.0 MΩ (Note 6) LM2585-5.0 Symbol Parameters Conditions Typical Min Max Units SYSTEM PARAMETERS Test Circuit of Figure 2 (Note 4) V OUT Output Voltage V IN = 4V to 12V 5.0 4.80/4.75 5.20/5.25 V I LOAD = 0.3A to 1.1A ∆V OUT/ Line Regulation V IN = 4V to 12V 20 50/100 mV ∆V IN I LOAD = 0.3A ∆V OUT/ Load Regulation V IN = 12V 20 50/100 mV ∆I LOAD I LOAD = 0.3A to 1.1A η Efficiency V IN = 12V, ILOAD = 0.6A 80 % UNIQUE DEVICE PARAMETERS (Note 5) V REF Output Reference Measured at Feedback Pin 5.0 4.913/4.900 5.088/5.100 V Voltage V COMP = 1.0V ∆V REF Reference Voltage V IN = 4V to 40V 3.3 mV Line Regulation www.national.com 2 |
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