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參數(shù)資料
| 型號： | SC4540ULTRT |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 920 kHz SWITCHING FREQ-MAX, DSO8 |
| 封裝： | 2 X 2 MM, ROHS COMPLIANT, MLPD-8 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 281K |
| 代理商： | SC4540ULTRT |
13
Applications Information (continued)
Application Circuit for Alternate Input voltages
The typical applications circuit for the SC4540 is shown in
Figure 2. The performance data and specifications included
in this document are for the typical application circuit
(Figure 2). The SC4540 can be used with input voltages
lower than 4.5V (see Figure 3). The Inductor, L1, will need
to be adjusted to allow proper operation for input volt-
ages between to 2.8V to 5.5V. The SC4538 datasheet
should be consulted for the performance of the lower
input voltage circuit.
OU T
LX
BL
CIN
4.5 to 12V
IN
EN
ISET
GN D
COM P
E nable and
PW M
dim m ing
L1
D
C OUT
SC 4540
1 μF
56μH
2.2μF
RISET
CCOM P
1.27kΩ
47n F
RCOM P
Figure 2 — Typical Application Circuit
OU T
LX
BL
2.2μF
2.8V to 5.5V
IN
EN
ISET
GN D
COM P
E nable and
PW M
dim m ing
R ISET
C COM P
22μH
D
1 μF
1.27kΩ
SC 4540
L1
47n F
RCOM P
CIN
COUT
Figure 3 — Low Input Voltage Application Circuit
SC4540
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