AT1780 controller equivalent, low-noise step-up current-mode pwm controller.
* 1.6A,0.21Ω,14V Power MOSFET
* Operating input voltage:+2.6V to +5.5V
* Adjustable Output from VIN to 12V
* 640kHz /1.2MHz pin selectable switching Frequ.
* LCD Displays
* Digital Cameras
* Portable Applications
* Hand-Held Devices
Block Diagram
VIN COMP
SH.
The AT1780 is a current-mode step-up DC/DC converter with a 1.6A, 0.21Ω power MOSFET. The soft-start function is programmed with an external capacitor, which sets the input current ramp rate. It is ideal for generating bias voltages for LCD panels. P.
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