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LM2597M-5.0 Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LM2597M-5.0 Datasheet(HTML) 3 Page - National Semiconductor (TI) |
3 / 34 page LM2597/LM2597HV-12 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.V INmax=40V for the LM2597 and 60V for the LM2597HV Symbol Parameter Conditions LM2597/LM2597HV-12 Units (Limits) Typ Limit (Note 4) (Note 5) SYSTEM PARAMETERS (Note 6) Test Circuit Figure 12 V OUT Output Voltage 15V ≤ V IN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A 12 V 11.52/11.40 V(min) 12.48/12.60 V(max) η Efficiency V IN = 25V, ILOAD = 0.5A 88 % LM2597/LM2597HV-ADJ 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.V INmax=40V for the LM2597 and 60V for the LM2597HV Symbol Parameter Conditions LM2597/LM2597HV-ADJ Units (Limits) Typ Limit (Note 4) (Note 5) SYSTEM PARAMETERS (Note 6) Test Circuit Figure 12 V FB Feedback Voltage 4.5V ≤ V IN ≤ VINmax, 0.1A ≤ ILOAD ≤ 0.5A 1.230 V V OUT programmed for 3V. Circuit of Figure 12. 1.193/1.180 V(min) 1.267/1.280 V(max) η Efficiency V IN = 12V, VOUT = 3V, ILOAD = 0.5A 80 % 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 and VIN = 24V for the 12V ver- sion. I LOAD = 100 mA. Symbol Parameter Conditions LM2597/LM2597HV-XX Units (Limits) Typ Limit (Note 4) (Note 5) DEVICE PARAMETERS I b Feedback Bias Current Adjustable Version Only, V FB = 1.235V 10 50/100 nA f O Oscillator Frequency (Note 7) 150 kHz 127/110 kHz(min) 173/173 kHz(max) V SAT Saturation Voltage I OUT = 0.5A (Notes 8 and 9) 0.9 V 1.1/1.2 V(max) DC Max Duty Cycle (ON) (Note 9) 100 % Min Duty Cycle (OFF) (Note 10) 0 I CL Current Limit Peak Current, (Notes 8 and 9) 0.8 A 0.65/0.58 A(min) 1.3/1.4 A(max) I L Output Leakage Current (Notes 8, 10 and 11) Output = 0V 50 µA(max) Output = −1V 2 mA 15 mA(max) I Q Operating Quiescent SD /SS Pin Open, V BS Pin Open(Note 10) 5mA www.national.com 3 |
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