0.5A Step-Down Switching Regulator
TC2574
The TC2574–5 Step-Down Voltage Regulator with 5.0V @ 0.5A Output Power Capability.
Typical Application with Through-Hole PC Board Layout
Feedback
1
+V
IN
Unregulated
DC Input
= 7.0 to 40 V
TC2574
(5V)
L1
330µH
5
Output
7
+V
IN
Regulated Output
+V
= 5.0V @ 0.5 A
OUT
4
Pwr
2
Sig 3
GND
ON/OFF
GND
C1
220µF
C2
220µF
D1
1N5819
GND
GND
C1 – 22µF, 63V, Aluminum Electrolytic
C2 – 220µF, 16V, Aluminum Electrolytic
D1 – 1.0A, 40V, Schotty Rectifier, 1N5819
L1 – 330µH, RL-1284-330, Renco Electronics
Figure 17. Schematic Diagram of the TC2574 (5V) Step-Down Converter
TC2574–5.0
GND
+
C1
C2
+V
IN
U1
+
D1
V
OUT
L1
GND
NOTE: Not to scale.
Figure 18. PC Board Layout Component Side
NOTE: Not to scale.
Figure 19. PC Board Layout Copper Side
19
TC2574-1 1/6/00
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
