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Features
1.4A, 0.17Ω, internal power switch
VIN operating range: 2.2V to 7.5V
600kHz/1.25MHz selectable frequency step-up DC/DC converter
20 pin TSSOP package
Inrush current limiting circuitry
External softstart override
4 Gamma buffers
Description The LM2711 is a compact bias solution for TFT displays. It has a current mode PWM step-up DC/DC converter with a 1.4A, 0.17Ω
internal switch. Capable of generating 8V at 300mA from a Lithium Ion battery, the LM2711 is ideal for generating bias voltages
for large screen LCD panels. The LM2711 can be operated at switching frequencies of 600kHz or 1.25MHz, allowing for easy filtering
and low noise. An external compensation pin gives the user flexibility in setting frequency compensation, which makes possible
the use of small, low ESR ceramic capacitors at the output. The LM2711 uses a patented internal circuitry to limit startup
inrush current of the boost switching regulator without the use of an external softstart capacitor. An external softstart
pin enables the user to tailor the softstart to a specific application. The LM2711 contains 4 Gamma buffers capable of supplying
50mA source and sink. The TSSOP-20 package ensures a low profile overall solution.
Applications
LCD Bias Supplies
Handheld Devices
Portable Applications
Cellular Phones/Digital Cameras
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