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LM2727 Datasheet(PDF) 19 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) 19 Page - National Semiconductor (TI)

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TABLE 3. Bill of Materials for Circuit of Figure 3 (Continued)
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
Cc1
VJ1206A4R7KXX
Capacitor
1206
4.7pF 10%
1
Vishay
Cc2
VJ1206A102KXX
Capacitor
1206
1nF 10%
1
Vishay
Rin
CRCW1206100J
Resistor
1206
10
Ω 5%
1
Vishay
Rfadj
CRCW12068872F
Resistor
1206
88.7k
Ω 1%
1
Vishay
Rc1
CRCW12062293F
Resistor
1206
229k
Ω 1%
1
Vishay
Rfb1
CRCW12064991F
Resistor
1206
4.99k
Ω 1%
1
Vishay
Rfb2
CRCW12064991F
Resistor
1206
4.99k
Ω 1%
1
Vishay
Rcs
CRCW1206152J
Resistor
1206
1.5k
Ω 5%
1
Vishay
TABLE 4. Bill of Materials for Circuit of Figure 4
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2727
Synchronous
Controller
TSSOP-14
1
NSC
Q1/Q2
Si4826DY
Asymetric Dual
N-MOSFET
SO-8
30V, 24m
Ω/ 8nC
Top 16.5m
Ω/ 15nC
1
Vishay
L1
DO3316P-222
Inductor
12.95x9.4x
5.21mm
2.2µH, 6.1A, 12m
Ω
1
Coilcraft
Cin1
10TPB100ML
POSCAP
7.3x4.3x3.1mm
100µF 10V 1.9Arms
1
Sanyo
Co1
4TPB220ML
POSCAP
7.3x4.3x3.1mm
220µF 4V 1.9Arms
1
Sanyo
Cc
C3216X7R1E105K
Capacitor
1206
1µF, 25V
1
TDK
Cin
C3216X7R1E225K
Capacitor
1206
2.2µF, 25V
1
TDK
Css
VJ1206X123KXX
Capacitor
1206
12nF, 25V
1
Vishay
Cc1
VJ1206A100KXX
Capacitor
1206
10pF 10%
1
Vishay
Cc2
VJ1206A561KXX
Capacitor
1206
560pF 10%
1
Vishay
Rin
CRCW1206100J
Resistor
1206
10
Ω 5%
1
Vishay
Rfadj
CRCW12064222F
Resistor
1206
42.2k
Ω 1%
1
Vishay
Rc1
CRCW12065112F
Resistor
1206
51.1k
Ω 1%
1
Vishay
Rfb1
CRCW12062491F
Resistor
1206
2.49k
Ω 1%
1
Vishay
Rfb2
CRCW12064991F
Resistor
1206
4.99k
Ω 1%
1
Vishay
Rcs
CRCW1206272J
Resistor
1206
2.7k
Ω 5%
1
Vishay
TABLE 5. Bill of Materials for Circuit of Figure 5
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2727
Synchronous
Controller
TSSOP-14
1
NSC
Q1
Si4884DY
N-MOSFET
SO-8
30V, 13.5m
Ω, @ 4.5V
15.3nC
1
Vishay
Q2
Si4884DY
N-MOSFET
SO-8
30V, 13.5m
Ω, @ 4.5V
15.3nC
1
Vishay
D1
BAT-54
Schottky Diode
SOT-23
30V
1
Vishay
Lin
P1166.102T
Inductor
7.29x7.29 3.51mm
1µH, 11A 3.7m
Ω
1
Pulse
L1
P1168.102T
Inductor
12x12x4.5 mm
1µH, 11A, 3.7m
Ω
1
Pulse
Cin1
10MV5600AX
Aluminum
Electrolytic
16mm D 25mm H
5600µF 10V 2.35Arms
1
Sanyo
Cinx
C3216X7R1E105K
Capacitor
1206
1µF, 25V
1
TDK
Co1, Co2,
Co3
16MV4700WX
Aluminum
Electrolytic
12.5mm D 30mm
H
4700µF 16V 2.8Arms
2
Sanyo
Cboot
VJ1206X104XXA
Capacitor
1206
0.1µF, 25V
1
Vishay
Cin
C3216X7R1E225K
Capacitor
1206
2.2µF, 25V
1
TDK
Css
VJ1206X123KXX
Capacitor
1206
12nF, 25V
1
Vishay
www.national.com
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