TABLE 1. Bill of Materials for Typical Application Circuit
ID
Part Number
Type
Synchronous
Controller
N-MOSFET
Inductor
Size
Parameters
Qty.
Vendor
U1
LM2727
TSSOP-14
TSSOP-14
1
NSC
Q1, Q2
L1
Si4884DY
SO-8
7.1x7.1x3.2mm
0805
30V, 4.1mΩ, 36nC
1.5µH, 6.1A 9.6mΩ
10µF 6.3V
1
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
Vishay
TDK
RLF7030T-1R5N6R1
C2012X5R1J106M
C3216X7R1E105K
6MV2200WG
Cin1, Cin2
Cinx
MLCC
TDK
Capacitor
AL-E
1206
1µF, 25V
TDK
Co1, Co2
Cboot
Cin
10mm D 20mm H
1206
2200µF 6.3V125mΩ
0.1µF, 25V
Sanyo
Vishay
TDK
VJ1206X104XXA
C3216X7R1E225K
VJ1206X123KXX
VJ1206A2R2KXX
VJ1206A181KXX
CRCW1206100J
CRCW12066342F
CRCW12063923F
CRCW12061002F
CRCW12061002F
CRCW1206222J
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Resistor
1206
0.1µF, 25V
Css
1206
12nF, 25V
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Cc1
1206
2.2pF 10%
180pF 10%
10Ω 5%
Cc2
1206
Rin
1206
Rfadj
Rc1
Resistor
1206
63.4kΩ 1%
392kΩ 1%
Resistor
1206
Rfb1
Rfb2
Rcs
Resistor
1206
10kΩ 1%
Resistor
1206
10kΩ 1%
Resistor
1206
2.2kΩ 5%
TABLE 2. Bill of Materials for Circuit of Figure 2
(Identical to BOM for 1.5V except as noted below)
ID
L1
Part Number
Type
Size
Parameters
Qty.
Vendor
RLF12560T-2R7N110 Inductor
12.5x12.8x6mm
2.7µH, 14.4A 4.5mΩ
1
TDK
Co1, Co2,
Co3, Co4
Cc1
10TPB100M
POSCAP
7.3x4.3x2.8mm
100µF 10V 1.9Arms
4
Sanyo
VJ1206A6R8KXX
VJ1206A271KXX
VJ1206A471KXX
CRCW12068451F
CRCW12061102F
Capacitor
Capacitor
Capacitor
Resistor
1206
1206
1206
1206
1206
6.8pF 10%
270pF 10%
470pF 10%
8.45kΩ 1%
11kΩ 1%
1
1
1
1
1
Vishay
Vishay
Vishay
Vishay
Vishay
Cc2
Cc3
Rc2
Rfb1
Resistor
TABLE 3. Bill of Materials for Circuit of Figure 3
ID
U1
Q1
Part Number
LM2727
Type
Synchronous
Controller
Size
TSSOP-14
SO-8
Parameters
Qty.
1
Vendor
NSC
@
Si4442DY
N-MOSFET
30V, 4.1mΩ, 4.5V,
1
Vishay
36nC
@
Q2
Si4442DY
BAT-54
N-MOSFET
SO-8
30V, 4.1mΩ, 4.5V,
1
Vishay
36nC
D1
Lin
L1
Schottky Diode
SOT-23
30V
1
1
1
Vishay
Coilcraft
Coilcraft
SLF12575T-1R2N8R2 Inductor
12.5x12.5x7.5mm
22.35x16.26x8mm
12µH, 8.2A, 6.9mΩ
1.5µH, 15A,4mΩ
D05022-152HC
Inductor
Aluminum
Electrolytic
Capacitor
Aluminum
Electrolytic
Capacitor
Capacitor
Capacitor
Cin1, Cin2
10MV5600AX
16mm D 25mm H
1206
5600µF10V 2.35Arms
1µF, 25V
2
1
2
Sanyo
TDK
Cinx
Co1, Co2,
Co3
C3216X7R1E105K
10MV5600AX
16mm D 25mm H
5600µF10V 2.35Arms
Sanyo
Cboot
Cin
VJ1206X104XXA
C3216X7R1E225K
VJ1206X123KXX
1206
1206
1206
0.1µF, 25V
2.2µF, 25V
12nF, 25V
1
1
1
Vishay
TDK
Css
Vishay
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