AAT3171 View Datasheet(PDF) - Analog Technology Inc
Part Name
Description
Manufacturer
AAT3171 Datasheet PDF : 19 Pages
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Data
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Output Current
(% of IMAX)
100.0
89.1
79.4
70.8
63.1
56.2
50.1
44.7
39.8
35.5
31.6
28.2
25.1
22.4
20.0
0.0
Table 1: Current Level Settings.
AAT3171
High Current, High Efficiency
Charge Pump with Auto-Timer
The S2Cwire interface records rising edges of the
EN/SET pin and decodes them into 16 individual
current level settings with Code 1 reserved for
maximum current. Once EN/SET has been held in
the logic high state for time TLAT (500µs), the pro-
grammed current is seen at the current source out-
puts and the internal data register is reset to 0. For
subsequent current level programming, the num-
ber of rising edges corresponding to the desired
code must be applied on the EN/SET pin.
When EN/SET is held low for an amount of time
longer than TOFF (500µs), the AAT3171 enters into
shutdown mode and draws less than 1µA from VIN.
Data and address registers are reset to 0 during
shutdown.
EN/SET
Data Reg
THI
TLO
T LAT
1
2
n-1
n ≤ 16
0
TOFF
n-1
0
Figure 1: S2Cwire Serial Interface Timing.
3171.2007.03.1.1
9
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