CAT4238 Datasheet, PDF (2/12 Pages) Catalyst Semiconductor – High Efficiency 10 LED Boost Converter

CAT4238
V_IN
C₁
4.7 mF
OFF _ON
L
47 mH
D
V_OUT
C₂
SW 0.22 mF
VIN
CAT4238
SHDN
FB ^{VFB = 300 mV}
GND
R₁
15 W
20 mA
L: Sumida CDC5D23B−470
D: Central CMDSH05−4
C2: Taiyo Yuden UMK212BJ224 (rated 50 V)
Figure 1. Typical Application Circuit
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
V_IN, FB voltage
SHDN voltage
−0.3 to +7
V
−0.3 to +7
V
SW voltage (Note 1)
up to 60
V
Storage Temperature Range
−65 to +160
_C
Junction Temperature Range
−40 to +150
_C
Lead Temperature
300
_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.
1. The SW pin voltage is rated up to 39 V for external continuous DC voltage.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameters
V_IN
SW pin voltage
Ambient Temperature Range
NOTE: Typical application circuit with external components is shown above.
Range
up to 5.5
0 to 38
−40 to +85
Units
V
V
_C
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