AAT1232
24V 100mA Step-Up Converter
VOUT
(SEL = High)
VOUT
(SEL = Low)
R3 = 4.99kΩ
R3 = 20.0kΩ
Ω
Ω
Ω
Ω
R1 (k )
R2 (k )
R1 (k )
R2 (k )
10.0
12.0
15.0
16.0
18.0
20.0
24.0
-
-
36.5
44.2
57.6
61.9
69.8
78.7
95.3
78.7
95.3
121
0
0
147
182
232
249
280
316
383
316
383
487
511
590
649
787
301
309
309
316
374
374
374
464
475
475
576
0
0
-
-
0
0
-
0
0
-
0
0
-
0
0
-
0
0
10.0
12.0
15.0
16.0
18.0
20.0
24.0
10.0
10.0
10.0
10.0
12.0
12.0
12.0
15.0
15.0
15.0
18.0
0
0
-
0
0
-
0
0
-
127
0
0
-
143
0
0
-
162
0
0
-
196
0
0
12.0
15.0
16.0
18.0
15.0
16.0
18.0
18.0
20.0
24.0
24.0
75.0
76.8
76.8
78.7
90.9
93.1
93.1
115
3.32
1.65
1.24
0.562
3.01
2.49
1.65
3.32
2.49
1.24
2.49
13.0
6.65
4.99
2.21
12.1
10.0
6.65
13.3
10.0
4.99
10.0
118
118
143
Table 1: SEL Pin Voltage Control Resistor Values (1% resistor tolerance).
S2Cwire Serial Interface
register is reset to the default value, which sets the
FB2 pin to 0.6V if EN is subsequently pulled high.
AnalogicTech's S2Cwire serial interface is a propri-
etary high-speed single-wire interface available
only from AnalogicTech. The S2Cwire interface
records rising edges of the EN/SET input and
decodes into 16 different states. Each state corre-
sponds to a voltage setting on the FB2 pin.
EN/SET
Rising
Edges
FB2
Reference
Voltage (V)
EN/SET
FB2
Rising Reference
Edges Voltage (V)
1
2
3
4
5
6
7
8
0.60 (Default)
0.64
9
0.92
0.96
1.00
1.04
1.08
1.12
1.16
1.20
10
11
12
13
14
15
16
0.68
S2Cwire Serial Interface Timing
0.72
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 sub-
sequently changed to the predetermined voltage.
When EN/SET is set low for a time greater than
TOFF, the AAT1232 is disabled. When disabled, the
0.76
0.80
0.84
0.88
Table 2: S2Cwire Voltage Control Settings
(SEL = Low).
1232.2006.12.1.3
13
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
