EP3003 Evaluation Board Manual
DESCRIPTION
This manual aims to illustrate how to use the EP3003 Evaluation Board (“EP3003 EVB”).
The EP3003 EVB is a Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Regulator featuring the
EP3003. The EP3003 EVB has an input voltage range of 2.5V to 5.5V, and either output is capable of
delivering up to 600mA of output current. In Burst Mode operation, the EP3003 requires only 50 uA of
quiescent current, and the EP3003 EVB provides higher efficiency at light load currents. In Pulse Skip
mode, the EP3003 EVB provides lower output ripple voltage at light load currents. In either mode, the
EP3003 EVB can provide up to 96% efficiency on either channel and consumes less than 1uA in
shutdown. The EP3003 comes in a small 10-Pin MS10E package, which has an exposed pad on the
bottom-side of the IC for better thermal performance. These features, plus the nominal operating
frequency of 1.5MHz (allowing the exclusive use of low profile surface mount components), make the
EP3003 EVB an ideal circuit for use in battery-powered, hand-held applications.
This manual includes Quick Start for using the EP3003 EVB, Demonstration Circuit, PCB Layout and Bill
of Material for the EP3003 EVB.
QUICK START
Demonstration circuit EP3003 EVB is easy to set up to evaluate the performance of the EP3003. Refer to
Figure 1 for proper measurement equipment setup and follow the procedure below:
1.
Connect the input power supply to the V
IN
and GND terminals on the up-side of the board. Do not
hot-plug V
IN
or increase V
IN
over the rated maximum supply voltage of 5.5V, or the part may be damaged.
Connect the loads between the V
OUT
and GND terminals on the right-side and left –side of the board.
Refer to figure 1 for the proper measurement equipment setup.
2.
Before proceeding to operation, jumper JP1 into the V
OUT1
voltage position of choice (2.5V, 2.8V, and
3.3V), and JP2 into the V
OUT2
voltage position of choice (1.2V, 1.5V, and 1.8V),and jumper JP3 into the
desired mode of operation: Pulse Skip or Burst Mode.
3.
Apply 3.3V at V
IN
. Measure both V
OUTS
; they should read 0V. If desired, one can measure the
shutdown supply current at this point. The supply current will be approximately 33 uA in shutdown, with
roughly 32 uA due to the optional 100k• pull-up resistor of the Power-On Reset (POR) feature. This
resistor can be removed, and the actual shutdown supply current can be measured, if the POR feature is
not required.
4.
Turn on V
OUT1
and V
OUT2
by changing jumpers JP1 and JP2 of choice voltages. Vary the input voltage
from 2.5V to 5.5V and adjust each load current from 0 to 600mA. Both output voltages should be
regulating.
5.
Set the load current of both outputs between 200 mA and 600 mA, and measure both output ripple
voltages; they should measure less than 20 mVAC each. Also, observe the voltage waveform at the
switch node (pin 3) of each regulator. The switching frequencies should be between 1.2 MHz and 1.8
MHz (T = 0.833 us and 0.555 us), and each switch node waveform should be rectangular in shape.
Rev.01
1/5
EOREX [ EOREX CORPORATION ]
