Datasheet

LM2524D, LM3524D
www.ti.com SNVS766E –JUNE 2009–REVISED MAY 2013
Resistor R3 sets the current limit to:
(15)
Figure 26 and Figure 27 show a PC board layout and stuffing diagram for the 5V, 1A regulator of Figure 25. The
regulator's performance is listed in Table 1.
*Mounted to Staver Heatsink No. V5-1.
Q1 = BD344
Q2 = 2N5023
L1 = >40 turns No. 22 wire on Ferroxcube No. K300502 Torroid core.
Figure 25. 5V, 1 Amp Step-Down Switching Regulator
Table 1.
Parameter Conditions Typical Characteristics
Output Voltage V
IN
= 10V, I
o
= 1A 5V
Switching Frequency V
IN
= 10V, I
o
= 1A 20 kHz
Short Circuit Current Limit V
IN
= 10V 1.3A
Load Regulation V
IN
= 10V
3 mV
I
o
= 0.2 − 1A
Line Regulation ΔV
IN
= 10 − 20V,
6 mV
I
o
= 1A
Efficiency V
IN
= 10V, I
o
= 1A 80%
Output Ripple V
IN
= 10V, I
o
= 1A 10 mVp-p
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