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AAT2315 Datasheet(PDF) 18 Page - Advanced Analogic Technologies

Part # AAT2315
Description  Dual 600mA Step-Down Converter with Synchronization
PDF  22 Pages
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Manufacturer  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT2315 Datasheet(HTML) 18 Page - Advanced Analogic Technologies

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AAT2513 Losses
The maximum dissipation occurs at dropout where V
IN = 2.7V. All values assume an 85°C ambient and a 120°C
junction temperature.
Figure 2: AAT2513 Evaluation Board Schematic
1.
L2
C2
V
O1
187k
R1
L1
V
O2
GND
LX2
R3
88.7k
R4
59.0k
R2
59.0k
C5
100pF
C4
100pF
C1
LX1
V
IN
C7
1μF
C6
1μF
C8
0.1μF
PS
1
VIN2
16
LX2
14
EN2
9
EN1
10
PGND2
13
AGND
2
MODE/SYNC
12
VCC
11
VIN1
5
FB1
4
FB2
3
LX1
7
PGND1
8
N/C
15
N/C
6
AAT2513
U1
C9
10μF
C3
10μF
R5
10
VIN
VIN
VCC
VCC
VIN
GND
GND
GND
GND
L1, L2 CDRH2D11
C1, C2 4.7μF 10V 0805 X5R
1
2
3
Phase Shift
1
2
3
Sync
1
2
3
Enable 1
1
2
3
Enable 2
C10
120μF
T
J(MAX) = TAMB +
Θ
JA · PLOSS = 85
°C + (28°C/W) · 533mW = 100°C
T
J(MAX) = TAMB +
Θ
JA · PLOSS = 85
°C + (50°C/W) · 533mW = 111°C
P
TOTAL
+ (t
sw · F · IO2 + 2 · IQ) · VIN
I
O1
2 · (R
DSON(HS) · VO1 + RDSON(LS) · (VIN -VO1)) + IO2
2 · (R
DSON(HS) · VO2 + RDSON(LS) · (VIN -VO2))
V
IN
=
=
+ (5ns · 1.7MHz · 0.6A + 60µA) · 2.7V = 533mW
0.6
2 · (0.725
Ω · 2.5V + 0.7Ω · (2.7V - 2.5V)) + 0.62 · (0.725Ω · 1.8V + 0.7Ω · (2.7V - 1.8V))
2.7V
AAT2513
Dual 600mA Step-Down
Converter with Synchronization
18
2513.2007.04.1.1
1. For enhanced transient configuration C5, C4 = 100pF and C1, C2 = 10µF.



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