AAT1142 View Datasheet(PDF) - Advanced Analogic Technologies
Part Name
Description
MFG CO.
'AAT1142' PDF : 21 Pages View PDF
SwitchRegTM
PRODUCT DATASHEET
AAT1142
800mA Voltage-Scaling Step-Down Converter
Data Bits
Data Register
D7
D6
D5
D4
D3
D2
D1
D0
Output Voltage (V)
1
X
X
0
0
0
0
0
0
0.60
2
X
X
0
0
0
0
0
1
0.65
3
X
X
0
0
0
0
1
0
0.70
4
X
X
0
0
0
0
1
1
0.75
5
X
X
0
0
0
1
0
0
0.80
6
X
X
0
0
0
1
0
1
0.85
7
X
X
0
0
0
1
1
0
0.90
8
X
X
0
0
0
1
1
1
0.95
9
X
X
0
0
1
0
0
0
1.00
10
X
0
0
0
1
0
0
1
1.05
11
X
X
0
0
1
0
1
0
1.10
12
X
X
0
0
1
0
1
1
1.15
13
X
X
0
0
1
1
0
0
1.20
14
X
X
0
0
1
1
0
1
1.25
15
X
X
0
0
1
1
1
0
1.30
16
X
X
0
0
1
1
1
1
1.35
17
X
X
0
1
0
0
0
0
1.40
18
X
X
0
1
0
0
0
1
1.45
19
X
X
0
1
0
0
1
0
1.50
20
X
X
0
1
0
0
1
1
1.55
21
X
X
0
1
0
1
0
0
1.60
22
X
X
0
1
0
1
0
1
1.65
23
X
X
0
1
0
1
1
0
1.70
24
X
X
0
1
0
1
1
1
1.75
25
X
X
0
1
1
0
0
0
1.80 (default)
26
X
X
0
1
1
0
0
1
1.85
27
X
X
0
1
1
0
1
0
1.90
28
X
X
0
1
1
0
1
1
1.95
29
X
X
0
1
1
1
0
0
2.00
30
X
X
0
1
1
1
0
1
2.00
31
X
X
0
1
1
1
1
0
2.00
32
X
X
0
1
1
1
1
1
2.00
Table 1: AAT1142 I2C Output Voltage Programming Map (X = don’t care).
S2Cwire Serial Interface
AnalogicTech’s S2Cwire serial interface is a proprietary
high-speed single-wire interface. The S2Cwire interface
records rising edges of the EN/SET input and decodes
them into one of 32 registers which determines the out-
put voltage, as shown in Table 2. Each state corresponds
to an output voltage setting.
When using the S2Cwire interface, both I2C inputs should
be tied to the ground return. This disables the I2C func-
tionality.
S2Cwire Serial Interface Timing
The S2Cwire serial interface has flexible timing. Data can
be clocked-in at speeds up to 1MHz. After data has been
submitted, EN/SET is held high to latch the data for a
period TLAT. The output is subsequently changed to the
predetermined voltage. When EN/SET is set low for a
time greater than TOFF, the AAT1142 is disabled. When
disabled, the data register is reset to the default value.
1142.2009.08.1.1
www.analogictech.com
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