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LM2595 Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM2595 Datasheet(HTML) 4 Page - National Semiconductor (TI) |
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4 / 29 page  LM2595-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. Symbol Parameter Conditions LM2595-ADJ Units (Limits) Typ Limit (Note 3) (Note 4) SYSTEM PARAMETERS (Note 5) Test Circuit Figure 1 V FB Feedback Voltage 4.5V ≤ V IN ≤ 40V, 0.1A ≤ ILOAD ≤ 1A 1.230 V V OUT programmed for 3V. Circuit of Figure 1 1.193/1.180 V(min) 1.267/1.280 V(max) η Efficiency V IN = 12V, VOUT = 3V, ILOAD = 1A 78 % 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 = 200 mA. Symbol Parameter Conditions LM2595-XX Units (Limits) Typ Limit (Note 3) (Note 4) DEVICE PARAMETERS I b Feedback Bias Current Adjustable Version Only,V FB = 1.3V 10 nA 50/100 nA (max) f O Oscillator Frequency (Note 6) 150 kHz 127/110 kHz(min) 173/173 kHz(max) V SAT Saturation Voltage I OUT = 1A (Notes 7, 8) 1 V 1.2/1.3 V(max) DC Max Duty Cycle (ON) (Note 8) 100 % Min Duty Cycle (OFF) (Note 9) 0 I CL Current Limit Peak Current (Notes 7, 8) 1.5 A 1.2/1.15 A(min) 2.4/2.6 A(max) I L Output Leakage Current Output = 0V (Notes 7, 9) and (Note 10) 50 µA(max) Output = −1V 2 mA 15 mA(max) I Q Quiescent Current (Note 9) 5 mA 10 mA(max) I STBY Standby Quiescent ON/OFF pin = 5V (OFF) (Note 10) 85 µA Current 200/250 µA(max) θ JC Thermal Resistance TO-220 or TO-263 Package, Junction to Case 2 ˚C/W θ JA TO-220 Package, Junction to Ambient (Note 11) 50 ˚C/W θ JA TO-263 Package, Junction to Ambient (Note 12) 50 ˚C/W θ JA TO-263 Package, Junction to Ambient (Note 13) 30 ˚C/W θ JA TO-263 Package, Junction to Ambient (Note 14) 20 ˚C/W ON/OFF CONTROL Test Circuit Figure 1 ON /OFF Pin Logic Input 1.3 V V IH Threshold Voltage Low (Regulator ON) 0.6 V(max) V IL High (Regulator OFF) 2.0 V(min) www.national.com 4 |
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