TM
MP2359 – 1.2A, 24V, 1.4MHz STEP-DOWN CONVERTER IN A TSOT23-6
Table 2—Suggested Surface Mount Inductors
Manufacturer
Toko
Sumida
Wurth Electronics
Part Number
A921CY-4R7M
CDRH4D28C/LD
7440530047
Inductance(µH)
4.7
4.7
4.7
Max DCR(Ω)
0.027
0.036
0.038
Current
Rating (A)
1.66
1.5
2.0
Dimensions
L x W x H (mm
3
)
6 x 6.3 x 3
5.1 x 5.1 x 3
5.8 x 5.8 x 2.8
TYPICAL APPLICATION CIRCUITS
D3
1N4148
(Optional)
V
IN
5
IN
BS
1
C3
22nF
OFF ON
Notes:
1) D3 can be installed if V
IN
< 5V
2) D2 can be installed if V
OUT
< 5V
3) No need for both D2 and D3
4
EN
D2
1N4148
(Optional)
V
OUT
3.3V
MP2359
SW
6
D1
B230A-13-F
3
GND
FB
U1
Figure 3—1.4MHz, 3.3V Output at 1A Step-Down Converter
V
IN
6V-12V
5
IN
BST
1
C3
10nF
MP2359
OFF ON
4
EN
SW
6
D1
1N5819HW-7
-V
OUT
-V
OUT
3
LED1
LED2
LED3
GND
2
FB
-V
OUT
-V
OUT
Figure 4—White LED Driver Application
MP2359 Rev. 1.1
6/23/2006
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