EP3003 Evaluation Board Manual

Rev.01

1/5

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.

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.

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.