Micrel, Inc.
MIC2808
Typical Application Circuit
LDO2
C3
LDO2
VIN
OUT
OUT
1µF
GND
6.3V
L1
4.7µH/1A
VIN
C1
2.2µF
6.3V
VIN
SW
VOUT
C7
1µF
6.3V
C8
VIN
2.2µF
6.3V
EN2
EN2
PVIN
LDO1
C2
LDO1
BYP
MIC2808-xxYFT
C6
1µF
6.3V
1µF
AVIN
EN
GND
6.3V
C4
0.1µF
6.3V
EN
DAC
DAC
NC
C5
1µF
6.3V
EN1
EN1
AGND
PGND
Bill of Materials
Item
Part Number
Manufacturer
Description
Qty.
C1, C8 C1608X5R0J225K
C2,
TDK(1)
2.2µF Ceramic Capacitor, 6.3V, X5R, Size 0603
1µF Ceramic Capacitor, 6.3V, X5R, Size 0603
0.1µF Ceramic Capacitor, 6.3V, X5R, Size 0603
2
C3,
C1608X5R0J105K
TDK(1)
5
1
C5-C7
C4
C1608X5R0J104K
VLS3012T-4R7M1R0
CDH3D13-4R7NC
ME3220-472MLB
LQH32CN4R7M53
MIPF2520D4R7
TDK(1)
TDK(1)
Sumida(3)
Coilcraft(4)
Murata(5)
FDK(6)
4.7µH, 1.2A, 130mꢀ, L3.0mm x W3.0mm x H1.2mm
4.7µH, 1.15A, 175mꢀ, L3.0mm x W3.0mm x H1.4mm
4.7µH, 1.4A, 190mꢀ, L3.2mm x W2.5mm x H2.0mm
4.7µH, 650mA, 150mꢀ, L3.2mm x W2.5mm x H1.55mm
4.7µH, 1.1A, 110mꢀ, L2.5mm x W2.0mm x H1.0mm
L1
1
2MHz 600mA Buck with DAC Input, Bypass Switch and Dual
Low Noise 200mA/30mA LDOs
1
U1
MIC2808-xxYFT
Micrel, Inc.(7)
Notes:
1. TDK: www.tdk.com
2. Vishay: www.vishay.com
3. Sumida: www.sumida.com
4. Coilcraft: www.coilcraft.com
5. Murata: www.murata.com
6. FDK: www.fdk.co.jp
7. Micrel, Inc.: www.micrel.com
M9999-071709-A
July 2009
15
MICREL [ MICREL SEMICONDUCTOR ]
