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LM2727 Datasheet(PDF) 18 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) 18 Page - National Semiconductor (TI)

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TABLE 1. Bill of Materials for Typical Application Circuit
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2727
Synchronous
Controller
TSSOP-14
TSSOP-14
1
NSC
Q1, Q2
Si4884DY
N-MOSFET
SO-8
30V, 4.1m
Ω, 36nC
1
Vishay
L1
RLF7030T-1R5N6R1
Inductor
7.1x7.1x3.2mm
1.5µH, 6.1A 9.6m
Ω
1
TDK
Cin1, Cin2
C2012X5R1J106M
MLCC
0805
10µF 6.3V
2
TDK
Cinx
C3216X7R1E105K
Capacitor
1206
1µF, 25V
1
TDK
Co1, Co2
6MV2200WG
AL-E
10mm D 20mm H
2200µF 6.3V125m
Ω
2
Sanyo
Cboot
VJ1206X104XXA
Capacitor
1206
0.1µF, 25V
1
Vishay
Cin
C3216X7R1E225K
Capacitor
1206
0.1µF, 25V
1
TDK
Css
VJ1206X123KXX
Capacitor
1206
12nF, 25V
1
Vishay
Cc1
VJ1206A2R2KXX
Capacitor
1206
2.2pF 10%
1
Vishay
Cc2
VJ1206A181KXX
Capacitor
1206
180pF 10%
1
Vishay
Rin
CRCW1206100J
Resistor
1206
10
Ω 5%
1
Vishay
Rfadj
CRCW12066342F
Resistor
1206
63.4k
Ω 1%
1
Vishay
Rc1
CRCW12063923F
Resistor
1206
392k
Ω 1%
1
Vishay
Rfb1
CRCW12061002F
Resistor
1206
10k
Ω 1%
1
Vishay
Rfb2
CRCW12061002F
Resistor
1206
10k
Ω 1%
1
Vishay
Rcs
CRCW1206222J
Resistor
1206
2.2k
Ω 5%
1
Vishay
TABLE 2. Bill of Materials for Circuit of Figure 2
(Identical to BOM for 1.5V except as noted below)
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
L1
RLF12560T-2R7N110
Inductor
12.5x12.8x6mm
2.7µH, 14.4A 4.5m
Ω
1
TDK
Co1, Co2,
Co3, Co4
10TPB100M
POSCAP
7.3x4.3x2.8mm
100µF 10V 1.9Arms
4
Sanyo
Cc1
VJ1206A6R8KXX
Capacitor
1206
6.8pF 10%
1
Vishay
Cc2
VJ1206A271KXX
Capacitor
1206
270pF 10%
1
Vishay
Cc3
VJ1206A471KXX
Capacitor
1206
470pF 10%
1
Vishay
Rc2
CRCW12068451F
Resistor
1206
8.45k
Ω 1%
1
Vishay
Rfb1
CRCW12061102F
Resistor
1206
11k
Ω 1%
1
Vishay
TABLE 3. Bill of Materials for Circuit of Figure 3
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2727
Synchronous
Controller
TSSOP-14
1
NSC
Q1
Si4442DY
N-MOSFET
SO-8
30V, 4.1m
Ω, @ 4.5V,
36nC
1
Vishay
Q2
Si4442DY
N-MOSFET
SO-8
30V, 4.1m
Ω, @ 4.5V,
36nC
1
Vishay
D1
BAT-54
Schottky Diode
SOT-23
30V
1
Vishay
Lin
SLF12575T-1R2N8R2
Inductor
12.5x12.5x7.5mm
12µH, 8.2A, 6.9m
Ω
1
Coilcraft
L1
D05022-152HC
Inductor
22.35x16.26x8mm
1.5µH, 15A,4m
Ω
1
Coilcraft
Cin1, Cin2
10MV5600AX
Aluminum
Electrolytic
16mm D 25mm H
5600µF10V 2.35Arms
2
Sanyo
Cinx
C3216X7R1E105K
Capacitor
1206
1µF, 25V
1
TDK
Co1, Co2,
Co3
10MV5600AX
Aluminum
Electrolytic
16mm D 25mm H
5600µF10V 2.35Arms
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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