Part Number: LM2776 I am getting Vout = -0.7V for the LM2776 part with the following conditions:
Vin = 5.5V
C between pins 5 and 6 = 1 uF
Cout = 2.2 uF
Any clues what might be happening here?
Part Number: LM2776 Hello
i have designed a negative 5V supply with the LM2776DBVR
as i read the datasheet i'm not sure what would be the best C FLY to chose ?
i chose 2 x 4.7uF ?
for the input / output i chose 10uF / 10uF (although the EVM has 2 x…
Part Number: LM2776 Hello team,
The output ripple measurement graph (Fig 1) is very different from the output ripple calculation equation (equation 4) on the datasheet.
The shape of the graph on Figure 1 is not linear. What is the condition of the circuit…
Part Number: LM2776 I am using the LM2776 to supply the negative rail of a dual supply rail to rail in & out op amp. If the LM2776 has no output for the negative rail but the positive rail is still there, will the op amp swing to the positive rail or…
Part Number: LM2776 Hi Team,
For the charge pump, I have some questions need to support.
1. Why charge pump can not output large current? Can we add the c apacitance capacity to achieve large current?
2. For charge pump a rchitecture, when the S1 and S3…
Part Number: LM2776 Hi team,
my customer are using LM2776 in series to have -10.6V output voltage, the schematic is below.
Phenomenon: when start up at low temp( 10℃~-40℃ ), the second stage only reach -7, can't reach -10.6V. if start up at room temp or…
Part Number: LM2776 Hi,
I have a problem with the LM2776 and it's not able to provide the inverted voltage. If we apply negative voltage to the test pins the LM2776 from a external power supply the part starts providing the inverted voltage.
Part Number: LM2776 Other Parts Discussed in Thread: TPS60403 Hello
I have an appplication, that is sensitive to switching frequencies at about 10 bis 20 kHz. I uses the LM2667, which as a fundamentel switching frequency of 2MHz. In my application, the…