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LM2743MTC/NOPB Datasheet(PDF) 31 Page - Texas Instruments

Part # LM2743MTC/NOPB
Description  LM2743 2.2-V to 16-V Input, voltage mode, synchronous buck controller with tracking
PDF  44 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM2743MTC/NOPB Datasheet(HTML) 31 Page - Texas Instruments

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HG
BOOT
ISEN
LG
PGND
FB
VCC
SD
PWGD
FREQ
SS/TRACK
SGND
EAO
PGND
VCC = 5V
VIN = 12V
VOUT = 3.3V@4A
RFB2
CC2
RC1
RCS
CSS
RFADJ
RCC
CCC
D1
CBOOT
Q1
CIN1,2
L1
+
CC1
RFB1
CO1,2
LM2743
RC2
CC3
RPULL-UP
+
31
LM2743
www.ti.com
SNVS276I – APRIL 2004 – REVISED FEBRUARY 2019
Product Folder Links: LM2743
Submit Documentation Feedback
Copyright © 2004–2019, Texas Instruments Incorporated
8.2.3.2 Detailed Design Procedure
Follow the detailed design procedure in Detailed Design Procedure.
8.2.3.3 Bill of Materials
Table 2. Bill of Materials
PART
PART NUMBER
TYPE
PACKAGE
DESCRIPTION
VENDOR
U1
LM2743
Synchronous
Controller
TSSOP-14
TI
Q1
FDS6898A
Dual N-MOSFET
SOIC-8
20 V, 10 m
Ω at 4.5 V, 16
nC
Fairchild
D1
MBR0520LTI
Schottky Diode
SOD-123
L1
DO3316P-682
Inductor
6.8 µH, 4.4 Arms, 27 m
Ω
Coilcraft
CIN1
16SP100M
Aluminum
Electrolytic
10mm x 6mm
100 µF, 16 V, 2.89 Arms
Sanyo
CO1
10SP56M
Aluminum
Electrolytic
6.3mm x 6mm
56 µF, 10 V, 1.7 Arms
Sanyo
CCC, CBOOT,
CIN2, CO2
VJ1206Y104KXXA
Capacitor
1206
0.1 µF, 10%
Vishay
CC3
VJ0805Y182KXXA
Capacitor
805
1800 pF, 10%
Vishay
CSS
VJ0805A123KXAA
Capacitor
805
12 nF, 10%
Vishay
CC2
VJ0805A821KXAA
Capacitor
805
820 pF 10%
Vishay
CC1
VJ0805A330KXAA
Capacitor
805
33 pF, 10%
Vishay
RFB2
CRCW08051002F
Resistor
805
10.0 k
Ω 1%
Vishay
RFB1
CRCW08053161F
Resistor
805
3.16 k
Ω 1%
Vishay
RFADJ
CRCW08051103F
Resistor
805
110 k
Ω 1%
Vishay
RC2
CRCW08051301F
Resistor
805
1.3 k
Ω 1%
Vishay
RCS
CRCW08052101F
Resistor
805
2.1 k
Ω 1%
Vishay
RCC
CRCW080510R0F
Resistor
805
10.0
Ω 1%
Vishay
RC1
CRCW08053322F
Resistor
805
33.2 k
Ω 1%
Vishay
RPULL-UP
CRCW08051003J
Resistor
805
100 k
Ω 5%
Vishay
8.2.4 Example Circuit 3
Figure 43. 12 V to 3.3 V at 4 A, fSW = 300 kHz
8.2.4.1 Design Requirements
This design converts 12 V (VIN) to 3.3 V (VOUT) at a maximum load of 4 A, with a switching frequency of 300 kHz.



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