LM2577S-12/NOPB National Semiconductor, LM2577S-12/NOPB Datasheet - Page 25
![IC REG SIMPLE SWITCHER TO-263-5](/photos/7/0/70012/ts5b_sml.jpg)
LM2577S-12/NOPB
Manufacturer Part Number
LM2577S-12/NOPB
Description
IC REG SIMPLE SWITCHER TO-263-5
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Up (Boost), Flyback, Forward Converterr
Datasheet
1.LM2577T-15NOPB.pdf
(31 pages)
Specifications of LM2577S-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
Surface Mount
Package / Case
D²Pak, TO-263 (5 leads + tab)
Input Voltage
40V
Output Voltage
15V
No. Of Pins
5
Operating Temperature Range
-40°C To +125°C
Msl
MSL 3 - 168 Hours
Switching Frequency Max
52kHz
Termination Type
SMD
Voltage Regulator Type
Boost Switching
Rohs Compliant
Yes
Filter Terminals
SMD
Input Voltage Primary Max
40V
Output Current Max
3A
For Use With
551011367-061 - BOARD WEBENCH LM2577,LM2585/87
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM2577S-12
*LM2577S-12/NOPB
LM2577S-12
*LM2577S-12/NOPB
LM2577S-12
Application Hints
T1 = Pulse Engineering, PE-65300
D1, D2 = 1N5821
FIGURE 23. Line Regulation (Typical) of Flyback
Regulator of Figure 22, +15V Output
FIGURE 22. Flyback Regulator Easily Provides Dual Outputs
(Continued)
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A: Output Voltage Change, 100 mV/div
B: Output Current, 100 mA/div
Horizontal: 10 ms/div
FIGURE 24. Load Transient Response of Flyback
Regulator of Figure 22, +15V Output
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