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参数资料
| 型号： | LM2742 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | N-Channel FET Synchronous Buck Regulator Controller for Low Output Voltages |
| 中文描述： | N沟道场效应管同步降压稳压控制器输出电压低 |
| 文件页数： | 10/22页 |
| 文件大小： | 619K |
| 代理商： | LM2742 |
TABLE 1. Bill of Materials for Typical Application Circuit
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2742
Synchronous
Controller
TSSOP-14
1
NSC
Q1, Q2
Si4884DY
N-MOSFET
SO-8
30V, 13m
, 15nC
1
Vishay
L1
RLF7030T-1R5N6R1
Inductor
7.1x7.1x3.2mm
1.5H, 6.1A 9.6m
1
TDK
Cin1, Cin2
C2012X5R1J106M
MLCC
0805
10F 6.3V
2
TDK
Cinx
C3216X7R1E105K
Capacitor
1206
1F, 25V
1
TDK
Co1, Co2
6MV2200WG
AL-E
10mm D 20mm H
2200F 6.3V125m
2
Sanyo
Cboot
VJ1206X104XXA
Capacitor
1206
0.1F, 25V
1
Vishay
Cin
C3216X7R1E225K
Capacitor
1206
2.2F, 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
5%
1
Vishay
Rfadj
CRCW12066342F
Resistor
1206
63.4k
1%
1
Vishay
Rc1
CRCW12063923F
Resistor
1206
392k
1%
1
Vishay
Rfb1
CRCW12061002F
Resistor
1206
10k
1%
1
Vishay
Rfb2
CRCW12061002F
Resistor
1206
10k
1%
1
Vishay
Rcs
CRCW1206222J
Resistor
1206
2.2k
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
2.7H, 14.4A 4.5m
1
TDK
Co1, Co2,
Co3, Co4
10TPB100M
POSCAP
7.3x4.3x2.8mm
100F 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
1%
1
Vishay
Rfb1
CRCW12061102F
Resistor
1206
11k
1%
1
Vishay
TABLE 3. Bill of Materials for Circuit of Figure 3
ID
Part Number
Type
Size
Parameters
Qty.
Vendor
U1
LM2742
Synchronous
Controller
TSSOP-14
1
NSC
Q1
Si4442DY
N-MOSFET
SO-8
30V, 4.1m
, @ 4.5V,
36nC
1
Vishay
Q2
Si4442DY
N-MOSFET
SO-8
30V, 4.1m
, @ 4.5V,
36nC
1
Vishay
D1
BAT-54
Schottky Diode
SOT-23
30V
1
Vishay
Lin
SLF12575T-1R2N8R2
Inductor
12.5x12.5x7.5mm
12H, 8.2A, 6.9m
1
Coilcraft
L1
D05022-152HC
Inductor
22.35x16.26x8mm
1.5H, 15A,4m
1
Coilcraft
Cin1, Cin2
10MV5600AX
Aluminum
Electrolytic
16mm D 25mm H
5600F10V 2.35Arms
2
Sanyo
Cinx
C3216X7R1E105K
Capacitor
1206
1F, 25V
1
TDK
Co1, Co2,
Co3
10MV5600AX
Aluminum
Electrolytic
16mm D 25mm H
5600F10V 2.35Arms
2
Sanyo
Cboot
VJ1206X104XXA
Capacitor
1206
0.1F, 25V
1
Vishay
Cin
C3216X7R1E225K
Capacitor
1206
2.2F, 25V
1
TDK
Css
VJ1206X123KXX
Capacitor
1206
12nF, 25V
1
Vishay
LM2742
www.national.com
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