LM2577N-12/NOPB National Semiconductor, LM2577N-12/NOPB Datasheet - Page 20

• Manufacturer Part Number: LM2577N-12/NOPB
• Description: IC REG SIMPLE SWITCHER 16-DIP
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Up (Boost), Flyback, Forward Converterr

Specifications of LM2577N-12/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 12V
• Current - Output: 3A
• Frequency - Switching: 52kHz
• Voltage - Input: 3.5 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• For Use With: 551011367-061 - BOARD WEBENCH LM2577,LM2585/87
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM2577N-12; *LM2577N-12/NOPB; LM2577N-12

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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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