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LM2576HVS-12 Folha de dados(PDF) 6 Page - Texas Instruments |
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LM2576HVS-12 Folha de dados(HTML) 6 Page - Texas Instruments |
6 / 37 page LM2576, LM2576HV SNVS107C – JUNE 1999 – REVISED APRIL 2013 www.ti.com ELECTRICAL CHARACTERISTICS ALL OUTPUT VOLTAGE VERSIONS 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, VIN = 25V for the 12V version, and VIN = 30V for the 15V version. ILOAD = 500 mA. LM2576-XX Units LM2576HV-XX Symbol Parameter Conditions (Limits) Typ Limit (1) DEVICE PARAMETERS Ib Feedback Bias Current VOUT = 5V (Adjustable Version Only) 50 100/500 nA fO Oscillator Frequency See (2) 52 kHz 47/42 kHz (Min) 58/63 kHz (Max) VSAT Saturation Voltage IOUT = 3A (3) 1.4 V 1.8/2.0 V(Max) DC Max Duty Cycle (ON) See (4) 98 % 93 %(Min) ICL Current Limit See (3)(2) 5.8 A 4.2/3.5 A(Min) 6.9/7.5 A(Max) IL Output Leakage Current Output = 0V 2 mA(Max) Output = −1V 7.5 mA Output = −1V (5)(6) 30 mA(Max) IQ Quiescent Current See (5) 5 mA 10 mA(Max) ISTBY Standby Quiescent ON /OFF Pin = 5V (OFF) 50 μA Current 200 μA(Max) θJA Thermal Resistance T Package, Junction to Ambient (7) 65 θJA T Package, Junction to Ambient (8) 45 °C/W θJC T Package, Junction to Case 2 θJA S Package, Junction to Ambient (9) 50 ON /OFF CONTROL Test Circuit Figure 21 and Figure 22 VIH ON /OFF Pin VOUT = 0V 1.4 2.2/2.4 V(Min) Logic Input Level VIL VOUT = Nominal Output Voltage 1.2 1.0/0.8 V(Max) IIH ON /OFF Pin Input ON /OFF Pin = 5V (OFF) 12 μA Current 30 μA(Max) IIL ON /OFF Pin = 0V (ON) 0 μA 10 μA(Max) (1) All limits specified 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. (2) The oscillator frequency reduces to approximately 11 kHz in the event of an output short or an overload which causes the regulated output voltage to drop approximately 40% from the nominal output voltage. This self protection feature lowers the average power dissipation of the IC by lowering the minimum duty cycle from 5% down to approximately 2%. (3) Output pin sourcing current. No diode, inductor or capacitor connected to output. (4) Feedback pin removed from output and connected to 0V. (5) Feedback pin removed from output and connected to +12V for the Adjustable, 3.3V, and 5V versions, and +25V for the 12V and 15V versions, to force the output transistor OFF. (6) VIN = 40V (60V for high voltage version). (7) Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ½ inch leads in a socket, or on a PC board with minimum copper area. (8) Junction to ambient thermal resistance (no external heat sink) for the 5 lead TO-220 package mounted vertically, with ¼ inch leads soldered to a PC board containing approximately 4 square inches of copper area surrounding the leads. (9) If the DDPAK/TO-263 package is used, the thermal resistance can be reduced by increasing the PC board copper area thermally connected to the package. Using 0.5 square inches of copper area, θJA is 50°C/W, with 1 square inch of copper area, θJA is 37°C/W, and with 1.6 or more square inches of copper area, θJA is 32°C/W. 6 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM2576 LM2576HV |
Nº de peça semelhante - LM2576HVS-12 |
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Descrição semelhante - LM2576HVS-12 |
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