- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375162 > AAT1145IDE-0.6-T1 (Advanced Analogic Technologies, Inc.) 1.2A Step-Down Converter PDF資料下載
參數(shù)資料
| 型號(hào)： | AAT1145IDE-0.6-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | 1.2A Step-Down Converter |
| 中文描述： | 1.2A的降壓轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 14/16頁(yè) |
| 文件大?。?/td> | 307K |
| 代理商： | AAT1145IDE-0.6-T1 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)當(dāng)前第14頁(yè)第15頁(yè)第16頁(yè)
AAT1145
1.2A Step-Down Converter
SwitchReg
TM
PRODUCT DATASHEET
14
1145.2007.11.1.1
w w w . a n a l o g i c t e c h . c o m
Step-Down Converter Design Example
Specifications
V
O
= 1.8V @1.2A
V
IN
= 2.7V to 4.2V (3.6V nominal)
f
S
= 1.5MHz
Transient droop = 80mV
V
O
= 50mV
1.8V Output Inductor
V
· (V
- V
)
V
IN(MAX)
I
L
f
OSC
1.8 · (4.2 - 1.8)
4.2
0.36 · 1.5 · 10
6
L = = =1.90μH
Δ
I
L
= 30%
I
O
= 0.3 · 1.2 = 360mA
For Sumida 2.2
μ
H inductor (CDRH2D14) with DCR 75m
Ω
, the
I
L
should be
V
V
IN
0.312
2
Δ
I
L
= L
1 - V
I
PKL
= I
O
+
Δ
I
L
= 1.2 + = 1.356A
2
P
L
= I
O
2
DCR = 1.2
2
0.0359 = 51.7mW
1.8V Output Capacitor
2 ·
Δ
I
LOAD
V
DROOP
· f
S
2 · 1.2
0.08 · 1.5 · 10
6
C
OUT
=
=
= 20μF; use 22μF
ESR
≤
I
Ω
L
V
O
0.05
0.312
Select a 22
μ
F, 10m
Ω
ESR ceramic capacitor to meet the ripple 50mV requirement.
V
· (V
- V
)
V
IN
· f
OSC
· L
1
8 · f
OSC
· C
OUT
Δ
V
OUT
≤
· ESR +
1.8 · (4.2 - 1.8)
= · 0.01 +
4.2 · 1.5 ·
10
6
· 2.2 ·
10
-6
1
8 · 1.5 ·
10
6
· 22 ·
10
-6
= 46.8mV
I
RMS
=
Δ
I
L
·0.289 = 0.312 · 0.289 = 90.2mArms
P
COUT
= ESR · I
RMS2
= 0.01 · 0.09022 = 81.4
μ
W
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT1145IDE-1.8-T1 | 1.2A Step-Down Converter |
| AAT1146 | Fast Transient 400mA Step-Down Converter |
| AAT1146IJS-0.6-T1 | Fast Transient 400mA Step-Down Converter |
| AAT1146IJS-1.875-T1 | Fast Transient 400mA Step-Down Converter |
| AAT1150 | GT 2C 2#4 SKT RECP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1145IDE-1.8-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5A Step-Down Converter |
| AAT1146 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 400mA Step-Down Converter |
| AAT1146_08 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 400mA Step-Down Converter |
| AAT1146AIGV-0.6-T1 | 制造商:Skyworks Solutions Inc 功能描述:Voltage Regulators - Switching Regulators Fast Transient 400mA Buck Converter |
| AAT1146IGV-0.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:Fast Transient 400mA Step-Down Converter |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。