W-6237 Datasheet, PDF (2/13 Pages) Copal Electronics – High Voltage CMOS Boost

W-6237
V_IN
3 V to
4.2 V C₁
4.7 F
OFF _ON
L
33 H
D
V_OUT
C₂
SW 0.22 F
VIN
W-6237
SHDN
FB ^{VFB = 300 mV}
GND
R₁
15
20 mA
L: Sumida CDRH3D16ï330
D: Central CMDSH05ï4 (rated 40 V)
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
ï0.3 to +7
V
ï0.3 to +7
V
SW voltage
ï0.3 to +55
V
Storage Temperature Range
ï65 to +160
C
Junction Temperature Range
ï40 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.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameters
V_IN
SW pin voltage
Ambient Temperature Range
6, 7 or 8 LEDs
Range
2.8 to 5.5
0 to 30
ï40 to +85
1 to 40
Units
V
V
C
mA
NOTE: Typical application circuit with external components is shown above.
3. Thin SOT23ï5 package thermal resistance _JA = 135$C/W when mounted on board over a ground plane.
2