Indistinct photo, please help identifying part number.

[TerraHertz]

From a photo off the net, I'd like to identify the National Semiconductor (now a division of TI) switching regulator. See red arrow in pic.

The NS symbol is clear, but the part number is indistinct.
I think it is LM34?? and is probably one of the Simple Switcher series.
All I know about the specs (Chinese manufactured RGB LED controller) is that the input supply is stated to be DC 5 to 24V. But this may be inaccurate.
Output is probably 12V, at a few amps capacity.
Package appears to be TO-263 (S)  or similar. 5 leads plus tab.

Online info from TI doesn't seem to have anything like a full line chart. Only pages pushing recent parts.
And my paper NS databooks are all too old.

Similar numbers I can find online are all the wrong package:
http://www.ti.com/lit/ds/symlink/lm3489.pdf    VSSOP-8
http://www.ti.com/lit/ds/symlink/lm3485.pdf    VSSOP-8
http://www.ti.com/lit/ds/symlink/lm3475.pdf    SOT-23-5
http://www.ti.com/lit/ds/symlink/lm3477.pdf    VSSOP-8

Does anyone recognize it?

[Guitarbro]

lm3450 Led driver? http://www.ti.com/lit/ds/symlink/lm3450.pdf

[TerraHertz]

lm3450 Led driver? http://www.ti.com/lit/ds/symlink/lm3450.pdf

No. The part I'm after is the input DC power converter for the board. It takes a DC input in the range 5 to 24V, and everything else on the PCB including processor, bluetooth link, and 4 variable LED output drivers (for 12V RGB LED strips) runs off its output. Which I assume is 12V.

The unit is intended to be run from a plugpack.
I want to find the datasheet to see how this power converter treats a LiPo 12V battery pack. It seems to me it will destroy the battery rapidly by discharging it way below the LiPo specs lower voltage limit. But I want to be sure.

[Guitarbro]

I think i figured it out. the second line is the part number, not the first. Looks to be a LM2575-5 .

[TerraHertz]

I think i figured it out. the second line is the part number, not the first. Looks to be a LM2575-5 .

Ah! Yes that would make sense. I was surprised that regulator could be supplying the current for 3 or 4 long 12V LED strips (via separately adjustable current sinks.) But if it's a 5V regulator, it's just supplying that CPU-bluetooth module at well under an amp, and the LEDs are drawing directly from the supply voltage. Which doesn't matter since the drives are current mode.

Package matches: http://www.ti.com/lit/ds/symlink/lm1575.pdf

Thanks!