AAT2689 Analogic Corporation, AAT2689 Datasheet - Page 18

• Manufacturer Part Number: AAT2689
• Manufacturer: Analogic Corporation

Channel 1 Current Limit
Voltage sense V
Total trace parasitic resistor and inductor DCR is 10mΩ
I
R
R
AAT2689 Losses
All values assume a 25°C ambient temperature and thermal resistance of 50°C/W in the TDFN34-16 package.
P
P
P
T
18
18
SystemPower
SystemPower
LIM
J(MAX)
TOTAL
TOTAL
TOTAL
8
7
=
=
=
V
R
R
DCR
= I
=
= 1.1W
= T
OCP
V
2
8
S
2.5A
- R
OUT1
· R
V
AMB
- I
OUT1
=
8
2
2
LIMIT
2
+ Θ
· R
TM
TM
100mV
=
· 70mΩ · 3.3V
10mΩ
· R
S
· DCR
DS(ON)H
12V
JA
133kΩ - 2kΩ
2kΩ · 133kΩ
PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters
PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters
= 100mV
2
· P
LOSS
= 10A > 5A
· D + (t
=
= 25°C + (50°C/W) · 1.1W = 80°C
0.1V - 5A · 10mΩ
+ (5ns · 490kHz · 2.5A + 70μA) · 12V · (3.3V - 1.8V) · 600mA
3.3V · 2kΩ
SW
= 2kΩ
· F
S
· I
OUT1
+ I
= 133kΩ
Q1
w w w . a n a l o g i c t e c h . c o m
w w w . a n a l o g i c t e c h . c o m
) · V
IN1
+ (V
IN2
- V
OUT2
) · I
OUT2
PRODUCT DATASHEET
PRODUCT DATASHEET
AAT2689
AAT2689
2689.2008.06.1.0
2689.2008.06.1.0