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LM2577T-15 データシート(PDF) 7 Page - Texas Instruments |
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LM2577T-15 データシート(HTML) 7 Page - Texas Instruments |
7 / 42 page LM1577, LM2577 www.ti.com SNOS658D – JUNE 1999 – REVISED APRIL 2013 Electrical Characteristics—LM1577-ADJ, LM2577-ADJ 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, VFEEDBACK = VREF, and ISWITCH = 0. Symbol Parameter Conditions Typical LM1577-ADJ LM2577-ADJ Units Limit(1)(2) Limit(3) (Limits) SYSTEM PARAMETERS Circuit of Figure 31 (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) ΔVOUT/ΔVIN Line Regulation VIN = 3.5V to 10V 20 mV ILOAD = 300 mA 50/100 50/100 mV(max) ΔVOUT/ΔILOA Load Regulation VIN = 5V 20 mV D ILOAD = 100 mA to 800 mA 50/100 50/100 mV(max) η Efficiency VIN = 5V, ILOAD = 800 mA 80 % DEVICE PARAMETERS IS Input Supply Current VFEEDBACK = 1.5V (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) VUV Input Supply ISWITCH = 100 mA 2.90 V Undervoltage Lockout 2.70/2.65 2.70/2.65 V(min) 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 Reference Measured at Feedback Pin V Voltage VIN = 3.5V to 40V 1.230 1.214/1.206 1.214/1.206 V(min) VCOMP = 1.0V 1.246/1.254 1.246/1.254 V(max) ΔVREF/ΔVIN Reference Voltage VIN = 3.5V to 40V 0.5 mV Line Regulation IB Error Amp VCOMP = 1.0V 100 nA Input Bias Current 300/800 300/800 nA(max) GM Error Amp ICOMP = −30 μA to +30 μA 3700 μmho Transconductance VCOMP = 1.0V 2400/1600 2400/1600 μmho(min) 4800/5800 4800/5800 μmho(max) AVOL Error Amp Voltage Gain VCOMP = 1.1V to 1.9V 800 V/V RCOMP = 1.0 MΩ (5) 500/250 500/250 V/V(min) Error Amplifier Upper Limit 2.4 V Output Swing VFEEDBACK = 1.0V 2.2/2.0 2.2/2.0 V(min) Lower Limit 0.3 V VFEEDBACK = 1.5V 0.40/0.55 0.40/0.55 V(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. (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 7 Product Folder Links: LM1577 LM2577 |
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同様の説明 - LM2577T-15 |
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