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LM2576HVT-ADJ Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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LM2576HVT-ADJ Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 24 page LM2576-ADJ, LM2576HV-ADJ Electrical Characteristics Specifications with standard type face are for T J = 25˚C, and those with boldface type apply over full Operating Temperature Range. Symbol Parameter Conditions LM2576-ADJ Units (Limits) LM2576HV-ADJ Typ Limit (Note 2) SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2 V OUT Feedback Voltage V IN = 12V, ILOAD = 0.5A 1.230 V V OUT = 5V, 1.217 V(Min) Circuit of Figure 2 1.243 V(Max) V OUT Feedback Voltage 0.5A ≤ I LOAD ≤ 3A, 1.230 V LM2576 8V ≤ V IN ≤ 40V 1.193/1.180 V(Min) V OUT = 5V, Circuit of Figure 2 1.267/1.280 V(Max) V OUT Feedback Voltage 0.5A ≤ I LOAD ≤ 3A, 1.230 V LM2576HV 8V ≤ V IN ≤ 60V 1.193/1.180 V(Min) V OUT = 5V, Circuit of Figure 2 1.273/1.286 V(Max) η Efficiency V IN = 12V, ILOAD = 3A, VOUT =5V 77 % All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for T J = 25˚C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, V IN = 12V for the 3.3V, 5V, and Adjustable version, VIN = 25V for the 12V version, and VIN = 30V for the 15V version. I LOAD = 500 mA. Symbol Parameter Conditions LM2576-XX Units (Limits) LM2576HV-XX Typ Limit (Note 2) DEVICE PARAMETERS I b Feedback Bias Current V OUT = 5V (Adjustable Version Only) 50 100/500 nA f O Oscillator Frequency (Note 11) 52 kHz 47/42 kHz (Min) 58/63 kHz (Max) V SAT Saturation Voltage I OUT = 3A (Note 4) 1.4 V 1.8/2.0 V(Max) DC Max Duty Cycle (ON) (Note 5) 98 % 93 %(Min) I CL Current Limit (Notes 4, 11) 5.8 A 4.2/3.5 A(Min) 6.9/7.5 A(Max) I L Output Leakage Current (Notes 6, 7): Output = 0V 2 mA(Max) Output = −1V 7.5 mA Output = −1V 30 mA(Max) I Q Quiescent Current (Note 6) 5 mA 10 mA(Max) I STBY Standby Quiescent ON /OFF Pin = 5V (OFF) 50 µA Current 200 µA(Max) www.national.com 5 |
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