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LM2577M-ADJ Fiches technique(PDF) 3 Page - Texas Instruments |
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LM2577M-ADJ Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 42 page LM1577, LM2577 www.ti.com SNOS658D – JUNE 1999 – REVISED APRIL 2013 Absolute Maximum Ratings (1) (2) Supply Voltage 45V Output Switch Voltage 65V Output Switch Current(3) 6.0A Power Dissipation Internally Limited Storage Temperature Range −65°C to +150°C Lead Temperature Soldering, 10 sec. 260°C Maximum Junction Temperature 150°C Minimum ESD Rating C = 100 pF, R = 1.5 k Ω 2 kV (1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to be functional, but device parameter specifications may not be ensured under these conditions. For ensured specifications and test conditions, see the Electrical Characteristics. (2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. (3) Due to timing considerations of the LM1577/LM2577 current limit circuit, output current cannot be internally limited when the LM1577/LM2577 is used as a step-up regulator. To prevent damage to the switch, its current must be externally limited to 6.0A. However, output current is internally limited when the LM1577/LM2577 is used as a flyback or forward converter regulator in accordance to the Application Hints. Operating Ratings Supply Voltage 3.5V ≤ VIN ≤ 40V Output Switch Voltage 0V ≤ VSWITCH ≤ 60V Output Switch Current ISWITCH ≤ 3.0A Junction Temperature Range LM1577 −55°C ≤ TJ ≤ +150°C LM2577 −40°C ≤ TJ ≤ +125°C Electrical Characteristics—LM1577-12, LM2577-12 Specifications with standard type face are for TJ = 25°C, and those in bold type face apply over full Operating Temperature Range. Unless otherwise specified, VIN = 5V, and ISWITCH = 0. Symbol Parameter Conditions Typical LM1577-12 LM2577-12 Units Limit(1)(2) Limit(3) (Limits) SYSTEM PARAMETERS Circuit of Figure 29(4) VOUT Output Voltage VIN = 5V to 10V 12.0 V ILOAD = 100 mA to 800 mA (1) 11.60/11.40 11.60/11.40 V(min) 12.40/12.60 12.40/12.60 V(max) Line Regulation VIN = 3.5V to 10V 20 mV ILOAD = 300 mA 50/100 50/100 mV(max) (1) Load Regulation VIN = 5V 20 mV ILOAD = 100 mA to 800 mA 50/100 50/100 mV(max) (2) η Efficiency VIN = 5V, ILOAD = 800 mA 80 % DEVICE PARAMETERS IS Input Supply Current VFEEDBACK = 14V (Switch Off) 7.5 mA 10.0/14.0 10.0/14.0 mA(max) ISWITCH = 2.0A 25 mA VCOMP = 2.0V (Max Duty Cycle) 50/85 50/85 mA(max) (1) All limits ensured at room temperature (standard type face) and at temperature extremes (boldface type). All limits are used to calculate Outgoing Quality Level, and are 100% production tested. (2) A military RETS electrical test specification is available on request. At the time of printing, the LM1577K-12/883, LM1577K-15/883, and LM1577K-ADJ/883 RETS specifications complied fully with the boldface limits in these columns. The LM1577K-12/883, LM1577K- 15/883, and LM1577K-ADJ/883 may also be procured to Standard Military Drawing specifications. (3) All limits ensured at room temperature (standard type face) and at temperature extremes (boldface type). All room temperature limits are 100% production tested. All limits at temperature extremes are ensured via correlation using standard Statistical Quality Control (SQC) methods. (4) External components such as the diode, inductor, input and output capacitors can affect switching regulator performance. When the LM1577/LM2577 is used as shown in the Test Circuit, system performance will be as specified by the system parameters. Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM1577 LM2577 |
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