LM2574N-3.3/NOPB National Semiconductor, LM2574N-3.3/NOPB Datasheet - Page 9

• Manufacturer Part Number: LM2574N-3.3/NOPB
• Description: IC REG SW 3.3V 500MA STPDN 8-DIP
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r
• Type: Step-Down (Buck)r

Specifications of LM2574N-3.3/NOPB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V
• Current - Output: 500mA
• Frequency - Switching: 52kHz
• Voltage - Input: 4.75 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Power - Output: 750mW
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *LM2574N-3.3; *LM2574N-3.3/NOPB; LM2574N-3.3

Block Diagram
DS011394-10
R1 = 1k
3.3V, R2 = 1.7k
5V, R2 = 3.1k
12V, R2 = 8.84k
15V, R2 = 11.3k
For Adj. Version
R1 = Open, R2 = 0
Note: Pin numbers are for the 8-pin DIP package.
FIGURE 1.
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