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參數(shù)資料
| 型號： | AAT1120 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | 500mA Step-Down Converter |
| 中文描述： | 500mA的降壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 705K |
| 代理商： | AAT1120 |
AAT1120
500mA Step-Down Converter
1120.2007.01.1.0
15
Step-Down Converter Design Example
Specifications
V
O
= 1.8V @ 250mA, Pulsed Load
Δ
I
LOAD
= 200mA
V
IN
= 2.7V to 4.2V (3.6V nominal)
F
S
= 1.5MHz
T
AMB
= 85°C
1.8V Output Inductor
(use 3.0
μ
H; see Table 1)
For Sumida inductor CDRH2D09-3R0, 3.0
μ
H, DCR = 150m
Ω
.
1.8V Output Capacitor
V
DROOP
= 0.1V
1
2
3
1
1.8V · (4.2V - 1.8V)
3.0μH · 1.5MHz · 4.2V
2
3
RMS
I
L1 · F
S
· V
IN(MAX)
= ·
·
3 ·
Δ
I
LOAD
V
DROOP
· F
S
3 · 0.2A
0.1V · 1.5MHz
C
OUT
=
=
= 4μF (use 4.7μF)
· = 66mArms
·
(V
O
) · (V
IN(MAX)
- V
O
)
=
P
esr
= esr · I
RMS2
= 5m
Ω
· (66mA)
2
= 21.8μW
V
V
1.8
V
1.8V
Δ
I
L1
= L1
1 - V
F
S
IN
3.0μH
1.5MHz 1 - = 228mA
4.2V
I
PKL1
= I
O
+
Δ
I
L1
= 250mA + 114mA = 364mA
2
P
L1
= I
O
2
DCR = 250mA
2
150m
Ω
= 9.375mW
L1 = 1.67 A
V
O2
= 1.67 A
1.8V = 3μH
μsec
μsec
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AAT1120IES-0.6-T1 | 500mA Step-Down Converter |
| AAT1121 | 1.5MHz, 250mA Step-Down Converter |
| AAT1121_07 | 1.5MHz, 250mA Step-Down Converter |
| AAT1121IES-0.6-T1 | 1.5MHz, 250mA Step-Down Converter |
| AAT1121IPS-0.6-T1 | 1.5MHz, 250mA Step-Down Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT1120IES-0.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:500mA Step-Down Converter |
| AAT1121 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5MHz, 250mA Step-Down Converter |
| AAT1121_07 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5MHz, 250mA Step-Down Converter |
| AAT1121IES-0.6-T1 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:1.5MHz, 250mA Step-Down Converter |
| AAT1121IPS-0.6-T1 | 制造商:SKYWORKS SOLUTIONS INC 功能描述:0.6VADJ 1.5MHZ STEP DOWN TDFN22- TR 制造商:Skyworks Solutions Inc 功能描述:DC TO DC CONVERTER |
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