AAT1275 Analogic Corporation, AAT1275 Datasheet - Page 15

• Manufacturer Part Number: AAT1275
• Manufacturer: Analogic Corporation

Step-Up Converter Design Example
Specifications
V
I
V
T
Output Inductor
From the characterization curves, the switching frequency at room temperature with a 300mA load and 2.2µH
inductor is about 800kHz.
V
D
1275.2006.12.1.2
OUT
AMB
OUT
IN
IN
MAX
= 2.7V to 4.2V (3.6V nominal)
= 300mA
GND
=
= 5V
= 50°C
CCase
120µF
V
OUT
C6
V
- V
OUT
L1 2.2µH
IN(MIN)
4.7µF
16.9kΩ
10V
=
C3
R4
5V - 2.7V
5V
Figure 3: AAT1275 Evaluation Board Schematic
10
11
4
1
7
2
SW
LIN
SET
GND
VCC
VIN
U1
AAT1275
= 0.46
PGND
OUT2
OUT1
FLT
EN
FB
Boost Converter with USB Power Switch
8
6
5
12
9
3
10K
R1
Enable
3
V
2
IN
1
R2
432k
R3
59k
V
IN
FLT
GND
V
O1
C2
4.7µF
10V
J5
C1
4.7µF
V
GND
O2
AAT1275
15