LM2776: LM2776

Part Number:LM2776

hi Team,

I am using LM2776 device to generate Negative 3.3V from +3.3V as Input supply. Both these voltages, +/- 3.3V, is applied as supply voltages of 3 OP-AMP and 1 Instrumentation Amplifier.

But I am getting Positive 0.5V approx at the output of Lm2776 instead of Negative 3.3V. When i am isolating the OP-AMPS and INA, output becomes -3.3V. In D/S max load current is mentioned as 200mA.

I have connected 1uF, with low ESR high stability, across C1 and C2. Also, input and output has 2.2uF in parallel to 0.1uF.

Please let me know of this behavior and any work around possible

Regards,

Vivek