Texas Instruments 0.6 1.6 MHz Boost Converters With 22V Internal FET Switch Evaluation Module LM2731YEVAL/NOPB LM2731YEVAL/NOPB データシート
製品コード
LM2731YEVAL/NOPB
0
25 50 75 100 125 150 175 200 225 250
50
60
70
80
90
100
EF
F
IC
IEN
C
Y
[%
]
IOUT[mA]
100 mV/Div
100 mA/Div
TIME (1
µ
s/DIV)
I
O
V
OUT
ripple
5V/Div
100 mA/Div
TIME (10 ms/DIV)
I
O
V
OUT
2V/Div
V
IN
100 mV/Div
5V/Div
TIME (1
µ
s/DIV)
V
OUT
ripple
V
SW
Basic Application Circuit - LM2733Y
4
Basic Application Circuit - LM2733Y
Table 1. LM2733Y Bill of Materials (V
IN
= 5V, V
OUT
= 12V, I
OUT
= 250mA)
Designation
Description
Size
Manufacturer Part #
Vendor
C1
Cap 2.2µF 16V
1206
EMK316BJ225ML
Taiyo Yuden
C2
Cap 4.7µF 16V
1812
EMK432BJ475ML
Taiyo Yuden
C3
Cap 220pF 50V
0805
VJ0805A221JXACW1BC
Vishay
R1
RES, 51k Ohm, 5%, 0.1W
0805
CRCW080551K0JNEA
Vishay
R2
RES, 118k Ohm, 1%, 0.1W
0805
CRCW0805118KFKEA
Vishay
R3
RES, 13.3k Ohm, 1%, 0.1W
0805
CRCW080513K3FKEA
Vishay
L1
Shielded Inductor 10µH 4A
CDRH125-100MC
Sumida
D1
Diode 20V 0.5A
SOT23
MBR0520
International
Rectifier
U1
IC LM2733YMF
Texas Instruments
Figure 3. Start Up
Figure 4. Switching Waveform and
V
IN
= 5V, V
OUT
= 12V, I
OUT
= 250mA
Output Voltage Ripple
V
IN
= 5V, V
OUT
= 12V, I
OUT
= 250mA
Figure 5. Load Transient
Figure 6. Efficiency
V
IN
= 5V, V
OUT
= 12V, I
OUT
= 50mA to 200mA
V
IN
= 5V, V
OUT
= 12V
3
SNVA066B – April 2003 – Revised April 2013
AN-1280 LM2731/LM2733 Evaluation Board
Copyright © 2003–2013, Texas Instruments Incorporated