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LM2590HVT-ADJ Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LM2590HVT-ADJ Datasheet(HTML) 3 Page - National Semiconductor (TI) |
3 / 20 page LM2590HV-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. Symbol Parameter Conditions LM2590HV-ADJ Units (Limits) Typ Limit (Note 4) (Note 5) η Efficiency V IN = 12V, VOUT = 3V, ILOAD =1A 76 % 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. ILOAD = 500 mA Symbol Parameter Conditions LM2590HV-XX Units (Limits) Typ Limit (Note 4) (Note 5) 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 7) 150 kHz 127/110 kHz(min) 173/173 kHz(max) V SAT Saturation Voltage I OUT = 1A (Note 8) (Note 9) 0.95 V 1.2/1.3 V(max) DC Max Duty Cycle (ON) (Note 9) 100 % Min Duty Cycle (OFF) (Note 10) 0 I CLIM Switch current Limit Peak Current, (Note 8) (Note 9) 1.9 A 1.3/1.2 A(min) 2.8/3.0 A(max) I L Output Leakage Current (Note 8) (Note 10) (Note 11) Output = 0V 50 µA(max) Output = −1V 5 mA 30 mA(max) I Q Operating Quiescent SD /SS Pin Open (Note 10) 5mA Current 10 mA(max) I STBY Standby Quiescent SD /SS pin = 0V (Note 11) 90 µA Current 200/250 µA(max) θ JC Thermal Resistance TO220 or TO263 Package, Junction to Case 2 ˚C/W θ JA TO220 Package, Juncton to Ambient (Note 12) 50 ˚C/W θ JA TO263 Package, Juncton to Ambient (Note 13) 50 ˚C/W θ JA TO263 Package, Juncton to Ambient (Note 14) 30 ˚C/W θ JA TO263 Package, Juncton to Ambient (Note 15) 20 ˚C/W SHUTDOWN/SOFT-START CONTROL Test Circuit of Figure 1 V SD Shutdown Threshold 1.3 V Voltage Low, (Shutdown Mode) 0.6 V(max) High, (Soft-start Mode) 2 V(min) V SS Soft-start Voltage V OUT = 20% of Nominal Output Voltage 2 V V OUT = 100% of Nominal Output Voltage 3 I SD Shutdown Current V SHUTDOWN = 0.5V 5µA 10 µA(max) I SS Soft-start Current V Soft-start = 2.5V 1.5 µA 5 µA(max) www.national.com 3 |
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