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LM2594HVMX-5.0 Arkusz danych(PDF) 5 Page - Texas Instruments |
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LM2594HVMX-5.0 Arkusz danych(HTML) 5 Page - Texas Instruments |
5 / 40 page LM2594, LM2594HV www.ti.com SNVS118C – DECEMBER 1999 – REVISED APRIL 2013 All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for TJ = 25°C, and those with boldface type apply over full Operating Temperature Range . Unless otherwise specified, VIN = 12V for the 3.3V, 5V, and Adjustable version and VIN = 24V for the 12V version. ILOAD = 100 mA Symbol Parameter Conditions LM2594/LM2594HV-XX Units (Limits) Typ(1) Limit(2) DEVICE PARAMETERS Ib Feedback Bias Current Adjustable Version Only, VFB = 1.3V 10 50/100 nA fO Oscillator Frequency See(3) 150 kHz 127/110 kHz(min) 173/173 kHz(max) VSAT Saturation Voltage IOUT = 0.5A (4) (5) 0.9 V 1.1/1.2 V(max) DC Max Duty Cycle (ON) See(5) 100 % Min Duty Cycle (OFF) See(6) 0 ICL Current Limit Peak Current(4)(5) 0.8 A 0.65/0.58 A(min) 1.3/1.4 A(max) IL Output Leakage Current Output = 0V(4)(6)(7) 50 μA(max) Output = −1V 2 mA 15 mA(max) IQ Quiescent Current See(6) 5 mA 10 mA(max) ISTBY Standby Quiescent Current ON/OFF pin = 5V (OFF)(7) 85 μA LM2594 200/250 μA(max) LM2594HV 140 250/300 μA(max) θJA Thermal Resistance P Package, Junction to Ambient(8) 95 °C/W MDPackage, Junction to Ambient(8) 150 ON/OFF CONTROL Test Circuit Figure 20 ON /OFF Pin Logic Input 1.3 V VIH Threshold Voltage Low (Regulator ON) 0.6 V(max) VIL High (Regulator OFF) 2.0 V(min) IH ON /OFF Pin Input Current VLOGIC = 2.5V (Regulator OFF) 5 μA 15 μA(max) IL VLOGIC = 0.5V (Regulator ON) 0.02 μA 5 μA(max) (1) Typical numbers are at 25°C and represent the most likely norm. (2) All limits ensured 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 specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (3) 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. (4) No diode, inductor or capacitor connected to output pin. (5) Feedback pin removed from output and connected to 0V to force the output transistor switch ON. (6) Feedback pin removed from output and connected to 12V for the 3.3V, 5V, and the ADJ. version, and 15V for the 12V version, to force the output transistor switch OFF. (7) VIN = 40V for the LM2594 and 60V for the LM2594HV. (8) Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional copper area will lower thermal resistance further. See application hints in this data sheet and the thermal model in Switchers Made Simple® software. Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM2594 LM2594HV |
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