AAT1142 Datasheet, PDF (15/22 Pages) Advanced Analogic Technologies – 800mA Voltage-Scaling Step-Down Converter

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
Register
1
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
Data Bits
D7 D6 D5 D4 D3 D2 D1 D0
Output
Voltage
(V)
XX 0 0 0 000
0.60
XX 0 0 0 001
0.65
XX 0 0 0 010
0.70
XX 0 0 0 011
0.75
XX 0 0 0 100
0.80
XX 0 0 0 101
0.85
XX 0 0 0 110
0.90
XX 0 0 0 111
0.95
XX 0 0 1 000
1.00
X0 0 0 1 001
1.05
XX 0 0 1 010
1.10
XX 0 0 1 011
1.15
XX 0 0 1 100
1.20
XX 0 0 1 101
1.25
XX 0 0 1 110
1.30
XX 0 0 1 111
1.35
XX 0 1 0 000
1.40
XX 0 1 0 001
1.45
XX 0 1 0 010
1.50
XX 0 1 0 011
1.55
XX 0 1 0 100
1.60
XX 0 1 0 101
1.65
XX 0 1 0 110
1.70
XX 0 1 0 111
1.75
X X 0 1 1 0 0 0 1.80 (default)
XX 0 1 1 001
1.85
XX 0 1 1 010
1.90
XX 0 1 1 011
1.95
XX 0 1 1 100
2.00
XX 0 1 1 101
2.00
XX 0 1 1 110
2.00
XX 0 1 1 111
2.00
Table 1: AAT1142 I²C Output Voltage Programming Map (X = don’t care).
1142.2006.07.1.0
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