LT3487EDD#TRPBF

LT3487 is a dual channel switching regulator generates positive and negative outputs for biasing CCD imagers. The boost regulator incorporates output disconnect technology to eliminate the DC current path from VIN to the output load that is present in standard boost configurations. The 2MHz switching frequency allows CCD solutions using tiny, low profile le capacitors and inductors and generates low noise outputs that are easy to filter. Schottky diodes are internal and the output voltages are set with one resistor per channel, reducing the external component count. The soft-start is sequenced such that the output ramp of the negative channel begins after the ramp of the positive channel. Internal sequencing circuitry also disables the negative channel until the positive channel has reached 87% of its final value, ensuring that the sum of the two outputs is always positive. It is widely used in application such as CCD bias, TFT LCD bias, OLED bias, ±rail generation for op-amps etc.

• Generates 15V at 45mA, –8V at 90mA from a Li-Ion cell
• Output disconnect, internal schottky diodes
• Requires only one resistor per channel to set output voltages
• Operating voltage range is 2.3V to 16V
• Output voltage upto 28V
• Separate VBAT pin allows separate sources for power and control circuitry
• Short-circuit robust
• Maximum duty cycle is 93% typical
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic DFN

Notes

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