LM2577N-ADJ National Semiconductor, LM2577N-ADJ Datasheet - Page 20

• Manufacturer Part Number: LM2577N-ADJ
• Description: IC, STEP-UP VOLTAGE REGULATOR, 16-DIP
• Manufacturer: National Semiconductor

Specifications of LM2577N-ADJ

• Primary Input Voltage: 40V
• No. Of Outputs: 1
• Output Voltage: 37V
• Output Current: 3A
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +125°C
• Supply Voltage Range: 3.5V To 40V
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Application Hints
Note: Pin numbers shown are for TO-220 (T) package.
A: Output Voltage Change, 100 mV/div. (AC-coupled)
B: Load current, 0.2 A/div
Horizontal: 5 ms/div
FIGURE 15. Load Transient Response of Step-Up
Regulator of Figure 13
FIGURE 14. Line Regulation (Typical) of Step-Up Regulator of Figure 13
FIGURE 13. Step-up Regulator Delivers 12V from a 5V Input
(Continued)
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A: Switch pin voltage, 10 V/div
B: Switch pin current, 2 A/div
C: Inductor current, 2 A/div
D: Output ripple voltage, 100 mV/div (AC-coupled)
Horizontal: 5 µs/div
FIGURE 16. Switching Waveforms of Step-Up
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Regulator of Figure 13
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