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LM2727 Datasheet(PDF) 20 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2727
Description  N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages
PDF  22 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2727 Datasheet(HTML) 20 Page - National Semiconductor (TI)

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TABLE 5. Bill of Materials for Circuit of Figure 5 (Continued)
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
Cc1
VJ1206A4R7KXX
Capacitor
1206
4.7pF 10%
1
Vishay
Cc2
VJ1206A681KXX
Capacitor
1206
680pF 10%
1
Vishay
Rin
CRCW1206100J
Resistor
1206
10
Ω 5%
1
Vishay
Rfadj
CRCW12064992F
Resistor
1206
49.9k
Ω 1%
1
Vishay
Rc1
CRCW12061473F
Resistor
1206
147k
Ω 1%
1
Vishay
Rfb1
CRCW12061492F
Resistor
1206
14.9k
Ω 1%
1
Vishay
Rfb2
CRCW12064991F
Resistor
1206
4.99k
Ω 1%
1
Vishay
Rcs
CRCW1206332J
Resistor
1206
3.3k
Ω 5%
1
Vishay
TABLE 6. Bill of Materials for Circuit of Figure 6
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2727
Synchronous
Controller
TSSOP-14
1
NSC
Q1/Q2
Si4826DY
Assymetric Dual
N-MOSFET
SO-8
30V, 24m
Ω/ 8nC
Top 16.5m
Ω/ 15nC
1
Vishay
D1
BAT-54
Schottky Diode
SOT-23
30V
1
Vishay
Lin
RLF7030T-1R0N64
Inductor
6.8x7.1x3.2mm
1µH, 6.4A, 7.3m
Ω
1
TDK
L1
RLF7030T-3R3M4R1
Inductor
6.8x7.1x3.2mm
3.3µH, 4.1A, 17.4m
Ω
1
TDK
Cin1
C4532X5R1E156M
MLCC
1812
15µF 25V 3.3Arms
1
Sanyo
Co1
C4532X5R1E156M
MLCC
1812
15µF 25V 3.3Arms
1
Sanyo
Cboot
VJ1206X104XXA
Capacitor
1206
0.1µF, 25V
1
TDK
Cin
C3216X7R1E225K
Capacitor
1206
2.2µF, 25V
1
TDK
Css
VJ1206X393KXX
Capacitor
1206
39nF, 25V
1
Vishay
Cc1
VJ1206A220KXX
Capacitor
1206
22pF 10%
1
Vishay
Cc2
VJ1206A681KXX
Capacitor
1206
680pF 10%
1
Vishay
Cc3
VJ1206A681KXX
Capacitor
1206
680pF 10%
1
Vishay
Rin
CRCW1206100J
Resistor
1206
10
Ω 5%
1
Vishay
Rfadj
CRCW12061742F
Resistor
1206
17.4k
Ω 1%
1
Vishay
Rc1
CRCW12061072F
Resistor
1206
10.7k
Ω 1%
1
Vishay
Rc2
CRCW120666R5F
Resistor
1206
66.5
Ω 1%
1
Vishay
Rfb1
CRCW12064991F
Resistor
1206
4.99k
Ω 1%
1
Vishay
Rfb2
CRCW12061002F
Resistor
1206
10k
Ω 1%
1
Vishay
Rcs
CRCW1206152J
Resistor
1206
1.5k
Ω 5%
1
Vishay
TABLE 7. Bill of Materials for 3.3V Circuit of Figure 6
(Identical to BOM for 1.8V except as noted below)
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
L1
RLF7030T-4R7M3R4
Inductor
6.8x7.1x 3.2mm
4.7µH, 3.4A, 26m
Ω
1
TDK
Cc1
VJ1206A270KXX
Capacitor
1206
27pF 10%
1
Vishay
Cc2
VJ1206X102KXX
Capacitor
1206
1nF 10%
1
Vishay
Cc3
VJ1206A821KXX
Capacitor
1206
820pF 10%
1
Vishay
Rc1
CRCW12061212F
Resistor
1206
12.1k
Ω 1%
1
Vishay
Rc2
CRCW12054R9F
Resistor
1206
54.9
Ω 1%
1
Vishay
Rfb1
CRCW12062211F
Resistor
1206
2.21k
Ω 1%
1
Vishay
Rfb2
CRCW12061002F
Resistor
1206
10k
Ω 1%
1
Vishay
TABLE 8. Bill of Materials for Circuit of Figure 7
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2727
Synchronous
Controller
TSSOP-14
1
NSC
www.national.com
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