參數(shù)資料
型號(hào): AAT2511_0605
廠商: Advanced Analog Technology,lnc.
英文描述: Dual 600mA, 1MHz Step-Down DC/DC Converter
中文描述: 雙600mA的,1MHz的降壓型DC / DC轉(zhuǎn)換器
文件頁(yè)數(shù): 14/20頁(yè)
文件大?。?/td> 603K
代理商: AAT2511_0605
Design Example
Specifications
V
O1
= 2.5V @ 600mA (adjustable using 0.6V version), pulsed load
Δ
I
LOAD
= 300mA
V
O2
= 1.8V @ 600mA (adjustable using 0.6V version), pulsed load
Δ
I
LOAD
= 300mA
V
IN
= 2.7V to 4.2V (3.6V nominal)
F
S
= 1.0 MHz
T
AMB
= 85°C
2.5V V
O1
Output Inductor
(see Table 1)
For Sumida inductor CDRH3D16, 10μH, DCR = 210m
Ω
.
1.8V V
O2
Output Inductor
(see Table 1)
For Sumida inductor CDRH3D16, 4.7μH, DCR = 105m
Ω
.
V
V
1.8
V
1.8V
Δ
I2 =
1 - =
1 - = 218mA
L
F
V
IN
4.7
H
1.0MHz
4.2V
I
PK2
= I
O2
+
Δ
I2 = 0.6A + 0.11A = 0.71A
2
P
L2
= I
O2
2
DCR = (0.6A)
2
105m
Ω
= 38mW
L2 = 3 A
V
O2
= 3 A
1.8V = 5.4
μ
H
μ
sec
μ
sec
V
V
2.5
V
2.5V
Δ
I1 =
1 - =
1 - = 100mA
L1
F
V
IN
10
H
1.0MHz
4.2V
I
PK1
= I
O1
+
Δ
I1 = 0.6A + 0.05A = 0.65A
2
P
L1
= I
O1
2
DCR = (0.4A)
2
210m
Ω
= 76mW
L1 = 3 A
V
O1
= 3 A
2.5V = 7.5
μ
H
μ
sec
μ
sec
AAT2511
Dual 600mA, 1MHz Step-Down DC/DC Converter
14
2511.2006.05.1.4
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