Datasheet

LP3470M5X-3.08
U2
VINA
VIND
LM2830
U3
U1
LM2830
SW
D1
FB
EN
L1
GND
C1
C2
R1
R2
C3
VINAVIND
SW
FB
EN
GND
D2
L2
C4
R4
R5
R6
3
1
2
V
IN
RESET
4
5
LP3470
C7
V
IN
V
O
= 3.3V @ 1.0A
V
O
= 1.2V @ 1.0A
R3
LM2830
SNVS454D –AUGUST 2006–REVISED APRIL 2013 www.ti.com
LM2830X Dual Converters with Delayed Enabled Design Example 6
Figure 30. LM2830X (1.6MHz): Vin = 5V, Vo = 1.2V @ 1.0A & 3.3V @1.0A
Table 7. Bill of Materials
Part ID Part Value Manufacturer Part Number
U1, U2 1.0A Buck Regulator TI LM2830X
U3 Power on Reset TI LP3470M5X-3.08
C1, C3 Input Cap 22µF, 6.3V, X5R TDK C3216X5ROJ226M
C2, C4 Output Cap 22µF, 6.3V, X5R TDK C3216X5ROJ226M
C7 Trr delay capacitor TDK
D1, D2 Catch Diode 0.3V
f
Schottky 1.5A, 30V
R
TOSHIBA CRS08
L1, L2 3.3µH, 1.3A Coilcraft ME3220-332
R2, R4, R5 10.0kΩ, 1% Vishay CRCW08051002F
R1, R6 45.3kΩ, 1% Vishay CRCW08054532F
R3 100kΩ, 1% Vishay CRCW08051003F
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