The MAX1513 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board that provides
voltages and features required for active-matrix, thinfilm
transistor (TFT), liquid-crystal displays. The EV kit
contains a step-up switching regulator for TFT source
driver supply, a positive two-stage charge pump and
linear postregulator for the TFT gate-on (GON) supply,
a negative one-stage charge pump and linear postregulator
for the TFT gate-off (GOFF) supply, a gamma reference,
and a low-voltage logic supply.
The EV kit operates from a DC supply voltage of +2.7V
to +5.5V. The step-up switching regulator is configured
for a +15V output at 500mA from a +4.5V to +5.5V input
voltage. The positive charge pump and postregulator
are configured for a +25V output using a single-stage
charge pump providing 25mA. The negative charge
pump and postregulator are configured for a
-10V output using a single charge-pump stage providing
50mA. The gamma reference is configured for
+14.7V providing 50mA. The low-voltage logic linear
regulator is configured for +3.3V providing 500mA.
The MAX1513 EV kit demonstrates low-quiescent current
and high efficiency (90%), and features overload
protection for the input and all outputs. Up to 1.5MHz
operation allows the use of tiny surface-mount components
and results in a circuit height less than 1.8mm.
The MAX1513 EV kit can be also used to evaluate the
MAX1514, which is a MAX1513 without a gamma linear regulator
controller and a buffer amplifier.
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