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LM2577SX-ADJ Fiches technique(PDF) 5 Page - Texas Instruments |
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LM2577SX-ADJ Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 42 page LM1577, LM2577 www.ti.com SNOS658D – JUNE 1999 – REVISED APRIL 2013 Electrical Characteristics—LM1577-15, LM2577-15 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 LM1577-15 LM2577-15 Units Limit(1)(2) Limit(3) (Limits) SYSTEM PARAMETERS Circuit of Figure 30(4) VOUT Output Voltage VIN = 5V to 12V 15.0 V ILOAD = 100 mA to 600 mA 14.50/14.25 14.50/14.25 V(min) (1) 15.50/15.75 15.50/15.75 V(max) Line Regulation VIN = 3.5V to 12V 20 mV ILOAD = 300 mA mV(max) 50/100 50/100 Load Regulation VIN = 5V 20 mV ILOAD = 100 mA to 600 mA mV(max) 50/100 50/100 η Efficiency VIN = 5V, ILOAD = 600 mA 80 % DEVICE PARAMETERS IS Input Supply Current VFEEDBACK = 18.0V 7.5 mA (Switch Off) 10.0/14.0 10.0/14.0 mA(max) ISWITCH = 2.0A 25 mA VCOMP = 2.0V 50/85 50/85 mA(max) (Max Duty Cycle) VUV Input Supply ISWITCH = 100 mA 2.90 V Undervoltage 2.70/2.65 2.70/2.65 V(min) Lockout 3.10/3.15 3.10/3.15 V(max) fO Oscillator Frequency Measured at Switch Pin 52 kHz ISWITCH = 100 mA 48/42 48/42 kHz(min) 56/62 56/62 kHz(max) VREF Output Reference Measured at Feedback Pin V Voltage VIN = 3.5V to 40V 15 14.70/14.55 14.70/14.55 V(min) VCOMP = 1.0V 15.30/15.45 15.30/15.45 V(max) Output Reference VIN = 3.5V to 40V 10 mV Voltage Line Regulation RFB Feedback Pin Input 12.2 k Ω Voltage Line Regulator GM Error Amp ICOMP = −30 μA to +30 μA 300 μmho Transconductance VCOMP = 1.0V 170/110 170/110 μmho(min) 420/500 420/500 μmho(max) AVOL Error Amp VCOMP = 1.1V to 1.9V 65 V/V Voltage Gain RCOMP = 1.0 MΩ (5) 40/20 40/20 V/V(min) (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. (5) A 1.0 M Ω resistor is connected to the compensation pin (which is the error amplifier's output) to ensure accuracy in measuring AVOL. In actual applications, this pin's load resistance should be ≥10 MΩ, resulting in AVOL that is typically twice the ensured minimum limit. Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM1577 LM2577 |
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