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LM2591HVS-3.3 数据表(PDF) 3 Page - National Semiconductor (TI) |
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LM2591HVS-3.3 数据表(HTML) 3 Page - National Semiconductor (TI) |
3 / 20 page 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 LM2591HV-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 (Note 7) (Note 8) 0.95 V 1.2/1.3 V(max) DC Max Duty Cycle (ON) (Note 8) 100 % Min Duty Cycle (OFF) (Note 9) 0 I CLIM Switch current Limit Peak Current, (Note 7) (Note 8) 1.9 A 1.3/1.2 A(min) 2.8/3.0 A(max) I L Output Leakage Current (Note 7) (Note 9) (Note 10) Output = 0V 50 µA(max) Output = −1V 5 mA 30 mA(max) I Q Operating Quiescent SD /SS Pin Open (Note 9) 5mA Current 10 mA(max) I STBY Standby Quiescent SD /SS pin = 0V (Note 10) 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 11) 50 ˚C/W θ JA TO263 Package, Juncton to Ambient (Note 12) 50 ˚C/W θ JA TO263 Package, Juncton to Ambient (Note 13) 30 ˚C/W θ JA TO263 Package, Juncton 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) I H ON /OFF Pin Input Current V LOGIC = 2.5V (Regulator OFF) 5 µA 15 µA(max) I L V LOGIC = 0.5V (Regulator ON) 0.02 µA 5 µA(max) Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Note 3: Typical numbers are at 25˚C and represent the most likely norm. Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). Note 5: External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance. When the LM2591HV is used as shown in the Figure 1 test circuit, system performance will be as shown in system parameters section of Electrical Characteristics. Note 6: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current overload. Note 7: No diode, inductor or capacitor connected to output pin. Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 9: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version to force the output transistor switch OFF. Note 10: VIN = 60V. www.national.com 3 |
类似零件编号 - LM2591HVS-3.3 |
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类似说明 - LM2591HVS-3.3 |
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