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LM2745 Datasheet(PDF) 21 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2745
Description  Synchronous Buck Controller with Pre-bias Startup, and Optional Clock Synchronization
PDF  23 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2745 Datasheet(HTML) 21 Page - National Semiconductor (TI)

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Example Circuits (Continued)
PART
PART NUMBER
TYPE
PACKAGE
DESCRIPTION
VENDOR
U1
LM2745
Synchronous
Controller
TSSOP-14
NSC
Q1
FDS6898A
Dual N-MOSFET
SO-8
20V, 10 m
Ω @ 4.5V, 16
nC
Fairchild
D1
MBR0520LTI
Schottky Diode
SOD-123
L1
DO3316P-682
Inductor
6.8 µH, 4.4Arms, 27 m
Ω Coilcraft
C
IN1
16SP100M
Aluminum
Electrolytic
10mm x 6mm
100 µF, 16V, 2.89Arms
Sanyo
C
O1
10SP56M
Aluminum
Electrolytic
6.3mm x 6mm
56 µF, 10V 1.7Arms
Sanyo
C
CC,CBOOT,
C
IN2, CO2
VJ1206Y104KXXA
Capacitor
1206
0.1 µF, 10%
Vishay
C
C3
VJ0805Y182KXXA
Capacitor
805
1800 pF, 10%
Vishay
C
SS
VJ0805A123KXAA
Capacitor
805
12 nF, 10%
Vishay
C
C2
VJ0805A821KXAA
Capacitor
805
820 pF 10%
Vishay
C
C1
VJ0805A330KXAA
Capacitor
805
33 pF, 10%
Vishay
R
FB2
CRCW08051002F
Resistor
805
10.0 k
Ω 1%
Vishay
R
FB1
CRCW08053161F
Resistor
805
3.16 k
Ω 1%
Vishay
R
FADJ
CRCW08051003F
Resistor
805
100 k
Ω 1%
Vishay
R
C2
CRCW08051301F
Resistor
805
1.3 k
Ω 1%
Vishay
R
CS
CRCW08052101F
Resistor
805
2.1 k
Ω 1%
Vishay
R
CC
CRCW080510R0F
Resistor
805
10.0
Ω 1%
Vishay
R
C1
CRCW08053322F
Resistor
805
33.2 k
Ω 1%
Vishay
R
PULL-UP
CRCW08051003J
Resistor
805
100 k
Ω 5%
Vishay
C
CLK
VJ0805A560KXAA
Capacitor
805
56 pF, 10%
Vishay
20137433
FIGURE 18. 5V to 2.5V @ 2A, f
SW = 300 kHz
www.national.com
21



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