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LM2574N-12 Folha de dados(PDF) 5 Page - National Semiconductor (TI) |
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LM2574N-12 Folha de dados(HTML) 5 Page - National Semiconductor (TI) |
5 / 24 page LM2574-ADJ, LM2574HV-ADJ Electrical Characteristics (Continued) Specifications with standard type face are for T J = 25˚C, and those with boldface type apply over full Operating Tempera- ture Range. Unless otherwise specified, V IN = 12V, ILOAD = 100 mA. Symbol Parameter Conditions LM2574-ADJ Units (Limits) LM2574HV-ADJ Typ Limit (Note 2) SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2 V FB Feedback Voltage 7V ≤ V IN ≤ 40V, 0.1A ≤ ILOAD ≤ 0.5A 1.230 V LM2574 V OUT Programmed for 5V. Circuit of Figure 2 1.193/1.180 V(Min) 1.267/1.280 V(Max) V FB Feedback Voltage 7V ≤ V IN ≤ 60V, 0.1A ≤ ILOAD ≤ 0.5A 1.230 LM2574HV V OUT Programmed for 5V. Circuit of Figure 2 1.193/1.180 V(Min) 1.273/1.286 V(Max) η Efficiency V IN = 12V, VOUT = 5V, ILOAD = 0.5A 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 Tempera- ture Range. Unless otherwise specified, V IN = 12V for the 3.3V, 5V, and Adjustable version, VIN = 25V for the 12V version, and V IN = 30V for the 15V version. ILOAD = 100 mA. Symbol Parameter Conditions LM2574-XX Units (Limits) LM2574HV-XX Typ Limit (Note 2) DEVICE PARAMETERS I b Feedback Bias Current Adjustable Version Only, V OUT = 5V 50 100/500 nA f O Oscillator Frequency (see Note 10) 52 kHz 47/42 kHz(Min) 58/63 kHz(Max) V SAT Saturation Voltage I OUT = 0.5A (Note 4) 0.9 V 1.2/1.4 V(max) DC Max Duty Cycle (ON) (Note 5) 98 % 93 %(Min) I CL Current Limit Peak Current, (Notes 4, 10) 1.0 A 0.7/0.65 A(Min) 1.6/1.8 A(Max) I L Output Leakage (Notes 6, 7) Output = 0V 2 mA(Max) Current 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) θ JA Thermal Resistance N Package, Junction to Ambient (Note 8) 92 θ JA N Package, Junction to Ambient (Note 9) 72 ˚C/W θ JA M Package, Junction to Ambient (Note 8) 102 θ JA M Package, Junction to Ambient (Note 9) 78 www.national.com 5 |
Nº de peça semelhante - LM2574N-12 |
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Descrição semelhante - LM2574N-12 |
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