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LM2597HVM-5.0 데이터시트(PDF) 4 Page - National Semiconductor (TI) |
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LM2597HVM-5.0 데이터시트(HTML) 4 Page - National Semiconductor (TI) |
4 / 34 page All Output Voltage Versions 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 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 Current 10 mA(max) I STBY Standby Quiescent SD /SS pin = 0V (Note 10)LM2597 85 µA Current 200/250 µA(max) LM2597HV 140 250/300 µA(max) θ JA Thermal Resistance N Package, Junction to Ambient (Note 12) 95 ˚C/W M Package, Junction to Ambient (Note 12) 150 SHUTDOWN/SOFT-START CONTROL Test Circuit of Figure 12 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 1.6 µA 5 µA(max) FLAG/DELAY CONTROL Test Circuit of Figure 12 Regulator Dropout Low (Flag ON) 96 % Detector 92 %(min) Threshold Voltage 98 %(max) VF SAT Flag Output Saturation I SINK = 3 mA 0.3 V Voltage V DELAY = 0.5V 0.7/1.0 V(max) IF L Flag Output Leakage Current V FLAG = 40V 0.3 µA Delay Pin Threshold 1.25 V Voltage Low (Flag ON) 1.21 V(min) High (Flag OFF) and V OUT Regulated 1.29 V(max) Delay Pin Source V DELAY = 0.5V 3 µA Current 6 µA(max) Delay Pin Saturation Low (Flag ON) 55 mV 350/400 mV(max) BIAS SUPPLY I BS Bias Supply Pin Current V BS = 2V (Note 10) 120 µA 400 µA(max) V BS = 4.4V (Note 10) 4 mA 10 mA(max) I Q Operating Quiescent Current V BS = 4.4V , Vin pin current(Note 10) 1 2 mA 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: Voltage internally clamped. If clamp voltage is exceeded, limit current to a maximum of 1 mA. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Note 4: Typical numbers are at 25˚C and represent the most likely norm. www.national.com 4 |
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