LM2577T-ADJ National Semiconductor, LM2577T-ADJ Datasheet - Page 26

• Manufacturer Part Number: LM2577T-ADJ
• Description: IC, STEP-UP VOLTAGE REGULATOR, TO-220-5
• Manufacturer: National Semiconductor

Specifications of LM2577T-ADJ

• Primary Input Voltage: 40V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 3A
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +125°C
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Application Hints
A: Switch pin voltage, 20 V/div
B: Primary current, 2 A/div
C: +15V Secondary current, 1 A/div
D: +15V Output ripple voltage, 100 mV/div
Horizontal: 5 µs/div
FIGURE 25. Line Regulation (Typical) of Flyback
FIGURE 27. Switching Waveforms of Flyback Regulator of Figure 22, Each Output Loaded with 60Ω
Regulator of Figure 22, −15V Output
(Continued)
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A: Output Voltage Change, 100 mV/div
B: Output Current, 100 mA/div
Horizontal: 10 ms/div
FIGURE 26. Load Transient Response of Flyback
Regulator of Figure 22, −15V Output
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