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3. TECHNICAL BRIEF
Microphone (VMIC)
The Microphone regulator supplies the microphone interface circuitry. The Microphone regulator is
optimized for extremely high ripple rejection up to 217 Hz and low noise.
VRF (VRF)
The VCXO regulator supplies the voltage controlled crystal oscillator (VCXO). The VCXO regulator is
optimized for high ripple rejection and low noise.
USB Interface (VUSB)
The VUSB regulator supplies the USB transceiver located in the DBB. Digital Baseband PLL (VPLL)
The VPLL regulator supplies the phase locked loop on the digital baseband (DBB).
General Purpose Regulator (VGP)
The General Purpose regulator is intended primarily to serve as a supply rail for camera modules. Its
voltage is programmable by setting VGPSel[3:0] in theLDOControl2 Register. VGP is enabled by
setting the VGPEn bit in LDOControl1 to 1.
Applications Regulator (VAPP)
The VAPP regulator is an adjustable regulator that uses an off chip pass device. It has two modes of
operation selected by the state of the VAPPCFG terminal. If VAPPCFG is pulled low the VAPP
regulator functions as a programmable voltage applications supply.
In this mode, VAPP is enabled or disabled using the VAPPEn bit of LDOControl1.
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
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Only for training and service purposes
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