AAT2511 AAT, AAT2511 Datasheet - Page 14
AAT2511
Manufacturer Part Number
AAT2511
Description
Step-Down DC/DC Converter
Manufacturer
AAT
Datasheet
1.AAT2511.pdf
(20 pages)
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Quantity
Price
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Design Example
Specifications
2.5V V
For Sumida inductor CDRH3D16, 10µH, DCR = 210mΩ.
1.8V V
For Sumida inductor CDRH3D16, 4.7µH, DCR = 105mΩ.
L1 = 3
L2 = 3
14
∆I1 =
P
∆I2 =
P
I
I
PK1
PK2
V
V
V
F
T
L1
L2
S
AMB
O1
O2
IN
= I
= I
= I
= I
µsec
L1 ⋅ F
µsec
O1
O2
L ⋅ F
O1
O2
= 2.5V @ 600mA (adjustable using 0.6V version), pulsed load ∆I
= 1.8V @ 600mA (adjustable using 0.6V version), pulsed load ∆I
= 2.7V to 4.2V (3.6V nominal)
= 1.0 MHz
= 85°C
V
O1
O2
A
V
A
2
2
O2
+
+
O
⋅ DCR = (0.4A)
⋅ DCR = (0.6A)
Output Inductor
Output Inductor
∆I1
∆I2
⋅ 1 -
2
2
⋅ V
⋅ V
⋅ 1 -
⎛
⎝
⎛
⎝
O1
O2
= 0.6A + 0.05A = 0.65A
= 0.6A + 0.11A = 0.71A
V
= 3
= 3
V
V
V
O2
IN
O1
IN
⎞
⎠
µsec
µsec
⎞
⎠
=
A
A
=
2
2
4.7µH ⋅ 1.0MHz
10µH ⋅ 1.0MHz
⋅ 210mΩ = 76mW
⋅ 105mΩ = 38mW
⋅ 2.5V = 7.5µH
⋅ 1.8V = 5.4µH
1.8 V
2.5 V
Dual 600mA, 1MHz Step-Down DC/DC Converter
⋅ 1 -
⋅ 1 -
⎛
⎝
⎛
⎝
(see Table 1)
(see Table 1)
1.8V
4.2V
2.5V
4.2V
⎞
⎠
⎞
⎠
= 218mA
= 100mA
LOAD
LOAD
= 300mA
= 300mA
AAT2511
2511.2006.02.1.2