W-6237

2

Figure 1. Typical Application Circuit

L: Sumida CDRH3D16 330

D: Central CMDSH05 4 (rated 40 V)

C2: Taiyo Yuden UMK212BJ224 (rated 50 V)

VIN

W-6237

L

D

15

20 mA

4.7 F

3 V to

4.2 V

0.22 F

FB

SW

GND

ON

33 H

OFF

SHDN

Table 1. ABSOLUTE MAXIMUM RATINGS

Parameters

Ratings

Units

0.3 to +7

V

SHDN voltage

0.3 to +7

V

SW voltage

0.3 to +55

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.

Table 2. RECOMMENDED OPERATING CONDITIONS

Parameters

Range

Units

2.8 to 5.5

V

SW pin voltage

0 to 30

V

Ambient Temperature Range

40 to +85

C

6, 7 or 8 LEDs

1 to 40

mA

NOTE:

Typical application circuit with external components is shown above.