AAT1142
800mA Voltage-Scaling Step-Down Converter
I2C Output Voltage Programming
The AAT1142 output voltage is programmed
through the I2C interface according to Table 1. The
data register encoded on the SCL and SDA lines
determines the output voltage set-point after initial
start-up. Upon power-up and prior to I2C program-
ming, the default output voltage is set to 1.8V.
Data Bits
Output
Voltage
(V)
Data
Register D7 D6 D5 D4 D3 D2 D1 D0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0.60
0.65
0.70
0.75
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
1.25
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80 (default)
1.85
1.90
1.95
2.00
2.00
2.00
2.00
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Table 1: AAT1142 I2C Output Voltage Programming Map (X = don’t care).
1142.2006.07.1.0
15
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
