TC2575 Datasheet, PDF (5/25 Pages) TelCom Semiconductor, Inc – 1.0A Step-Down Switching Regulator

1.0A Step-Down Switching Regulator
TC2575
7.0 – 40V
Unregulated
DC Input
CIN
100µF
+VIN
+¹
Feedback
4
TC2575
Output
2
3 GND
5 ON/OFF
L1
330µH
D1
1N5819
5.0V Regulated
Output 1.0A Load
COUT
330µF
Figure 1. Block Diagram and Typical Application: Fixed Output Voltages
VIN
Unregulated
DC Input
8.0 – 40V
5.0 Output Voltage Versions
VIN
1
TC2575
(5V)
+ _{CIN 3 GND}
5
100µF/50V
Feedback
4
Output
L1
330µH
VOUT
Regulated
Output
2
ON/OFF
COUT ₊
D1 330µF/16V
IN5819
Load
Unregulated
DC Input
8.0 – 40V
Adjustable Output Voltage Versions
Feedback
VIN
1
3
+ _CIN
100µF/50V
4
TC2575
Adjustable
Output
2
GND ^{5 ON/OFF}
L1
330µH
D1
IN5819
+ CIN
330µF/
16V
VOUT
Regulated
Output
R2
Load
R1
( ) ^{VOUT = VREF}
1 + ^R2
R1
( ) R1= R2 VOUT - 1
VREF
Where VREF = 1.23V, R1
between 1.0kΩ and 5.0kΩ
Figure 2. Typical Test Circuit
TC2575-1 3/13/00
5