TLV61048: unstable operation

Now we testing tlv61048 and have some problem.

test condition : use Li-ion Battery(3.7~4.2V), output=5.2Volt, 600mA

1. Output Enable : Even if the enable signsl is set low, the output remains constant from 5.2V to 3.2V.

                             I wnat to zero volt ( Power Consumption zero )

2. Output current : Operate at 5.2V/100mA and operate 600mA, voltage drop to 3.2V.

3. Output voltage : When the powwer switch is on, the output to 3.2V.  When the peripheral circuit operates,

                             it goes up to 5.2V. ( unstable operation )