AAT2510IWP-IH-T1 AnalogicTech, AAT2510IWP-IH-T1 Datasheet - Page 14

• Manufacturer Part Number: AAT2510IWP-IH-T1
• Description: Dual 400mA, 1MHz Step-Down DC-DC Converter
• Manufacturer: AnalogicTech

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 @ 400mA (adjustable using 0.6V version), pulsed load ∆I
= 1.8V @ 400mA (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 = 0.4A
Output Inductor
Output Inductor
∆I1
∆I2
⋅ 1 -
2
2
⋅ V
⋅ V
⋅ 1 -
⎛
⎝
⎛
⎝
O1
O2
= 0.4A + 0.05A = 0.45A
= 0.4A + 0.11A = 0.51A
V
= 3
= 3
V
V
V
O2
IN
O1
IN
⎞
⎠
µsec
µsec
⎞
⎠
=
A
A
2
2
=
⋅ 210mΩ = 34mW
⋅ 105mΩ = 17mW
4.7µH ⋅ 1.0MHz
10µH ⋅ 1.0MHz
⋅ 2.5V = 7.5µH
⋅ 1.8V = 5.4µH
1.8 V
2.5 V
Dual 400mA, 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
AAT2510
2510.2005.08.1.5