
CAT4137
V IN
L
D
V OUT
2.2 to
5.5 V
C1
1 m F
22 m H
VIN
SW
C2
0.22 m F
CAT4137
OFF ON
SHDN
GND
FB
V FB = 300 mV
R1
15 W
L: Murata LQH32CN220
D: Central CMDSH2-3 (rated 30 V)
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
VIN, FB voltage
SHDN voltage
SW voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Rating
? 0.3 to +7
? 0.3 to +7
? 0.3 to +40
? 65 to +160
? 40 to +150
300
Unit
V
V
V
_ C
_ C
_ C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameter
VIN
SW pin voltage
Ambient Temperature Range
LED Bias Current
http://onsemi.com
2
Range
2.2 to 5.5
0 to 24
? 40 to +85
1 to 30
Unit
V
V
_ C
mA