AAT2842INJ-EE-T1 Advanced Analog Technology, Inc., AAT2842INJ-EE-T1 Datasheet - Page 16

• Manufacturer Part Number: AAT2842INJ-EE-T1
• Description: High-Current Charge Pump with S2Cwire Control and Dual LDO for Backlight and Flash
• Manufacturer: Advanced Analog Technology, Inc.

Evaluation Board Layout
Evaluation Board User Interface
The user interface for the AAT2842 evaluation
board is provided through four buttons and a num-
ber of connection terminals. The board is operated
by supplying external power and pressing individual
buttons or button combinations. Table 4 indicates
the function of each button or button combination.
To power-on the board, connect a power supply or
battery to the DC- and DC+ terminals. Close the
board supply connection by positioning the J1
jumper to the ON position. A red LED indicates that
power is applied.
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Figure 2: AAT2842 Evaluation
Board Top Layer.
Control and Dual LDO for Backlight and Flash
High-Current Charge Pump with S
The evaluation board is flexible so that the user
can disconnect the enable lines from the micro-
controller and apply external enable signals. By
removing the jumpers from J2, J3, and/or J4, exter-
nal enable signals can be applied to the board.
External enable signals must be applied to Pin 1 of
each J2, J3, or J4 terminal.
When applying external enable signals, considera-
tion must be given to the voltage levels. The exter-
nally applied voltages cannot exceed the supply
voltage that is applied to the IN pins of the device
(DC+).
The LDO loads can be connected directly to the
evaluation board. For adequate performance, be
sure to connect the load between OUTA/OUTB and
DC-, as opposed to some other GND in the system.
Figure 3: AAT2842 Evaluation Board
Bottom Layer.
AAT2842
2842.2007.09.1.2
2
Cwire™