Datasheet

HG
BOOT
I
SEN
LG
PGND
FB
V
CC
SD
PWGD
FREQ
SS/TRACK
SGND
EAO
PGND
V
CC
= 5V
V
IN
= 5V
V
OUT
= 2.5V@2A
R
FB2
C
C2
R
C1
R
CS
C
SS
R
FADJ
R
CC
C
CC
D
1
C
BOOT
Q1
C
IN
1,2
L1
+
C
C1
R
FB1
C
O
1,2
LM2743
R
C2
C
C3
R
PULL-UP
+
LM2743
www.ti.com SNVS276G –APRIL 2004–REVISED MARCH 2013
Table 1. Bill of Materials (continued)
PART PART NUMBER TYPE PACKAGE DESCRIPTION VENDOR
R
CC
CRCW080510R0F Resistor 805 10.0Ω 1% Vishay
R
C1
CRCW08055492F Resistor 805 54.9kΩ 1% Vishay
R
PULL-UP
CRCW08051003J Resistor 805 100kΩ 5% Vishay
Figure 40. 5V to 2.5V @ 2A, f
SW
= 300kHz
Table 2. Bill of Materials
PART PART NUMBER TYPE PACKAGE DESCRIPTION VENDOR
U1 LM2743 Synchronous TSSOP-14 TI
Controller
Q1 FDS6898A Dual N-MOSFET SOIC-8 20V, 10mΩ@ 4.5V, 16nC Fairchild
D1 MBR0520LTI Schottky Diode SOD-123
L1 DO3316P-682 Inductor 6.8µH, 4.4Arms, 27mΩ Coilcraft
C
IN
1 16SP100M Aluminum 10mm x 6mm 100µF, 16V, 2.89Arms Sanyo
Electrolytic
C
O
1 10SP56M Aluminum 6.3mm x 6mm 56µF, 10V 1.7Arms Sanyo
Electrolytic
C
CC
, C
BOOT,
VJ1206Y104KXXA Capacitor 1206 0.1µF, 10% Vishay
C
IN
2, C
O
2
C
C3
VJ0805Y182KXXA Capacitor 805 1800pF, 10% Vishay
C
SS
VJ0805A123KXAA Capacitor 805 12nF, 10% Vishay
C
C2
VJ0805A821KXAA Capacitor 805 820pF 10% Vishay
C
C1
VJ0805A330KXAA Capacitor 805 33pF, 10% Vishay
R
FB2
CRCW08051002F Resistor 805 10.0kΩ 1% Vishay
R
FB1
CRCW08053161F Resistor 805 3.16kΩ 1% Vishay
R
FADJ
CRCW08051103F Resistor 805 110kΩ 1% Vishay
R
C2
CRCW08051301F Resistor 805 1.3kΩ 1% Vishay
R
CS
CRCW08052101F Resistor 805 2.1 kΩ 1% Vishay
R
CC
CRCW080510R0F Resistor 805 10.0Ω 1% Vishay
R
C1
CRCW08053322F Resistor 805 33.2kΩ 1% Vishay
R
PULL-UP
CRCW08051003J Resistor 805 100kΩ 5% Vishay
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