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CAT4139
V IN
L
D
V OUT
9 strings at
20 mA
5V
22 m H
C1
4.7 m F
VIN
SW
C2
1 m F
35 V
OFF ON
CAT4139
SHDN FB
GND
(300 mV)
R2
1 k W
I OUT
180 mA
R1
1.62 W
L: Sumida CDRH6D28 ? 220
D: Central CMSH1 ? 40 (rated 40 V)
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameters
VIN, FB Voltage
SHDN Voltage
SW Voltage
Storage Temperature Range
Junction Temperature Range
Lead Temperature
Ratings
? 0.3 to +7
? 0.3 to +7
? 0.3 to +40
? 65 to +160
? 40 to +150
300
Units
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 (Typic al application circuit with external components is shown above.)
Parameters
VIN
SW pin voltage
Ambient Temperature Range (Note 2)
Range
up to 5.5
0 to 22
? 40 to +85
Units
V
V
_ C
2. TSOT23 ? 5 package thermal resistance q JA = 135 ° C/W when mounted on board over a ground plane.
http://onsemi.com
2
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