LG -A290 Service Manual page 21

SIM2 LDO (Vsim2)
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The SIM LDO is a linear regulator that could source 0mA (max) with 1.8V or 3.0V output voltage selection based on the
supply specs of the nd subscriber identity modules (SIM) card.
It supplies the nd SIM card and SIM level shifter circuitry in the handset. The Vsim LDO is controlled independently by
the register named VSIM_EN.
USB LDO (Vusb)

The USB LDO is a linear regulator that could source 75mA (max) with 3.3V output dedicated for USB circuitry. It is
controlled independently by the register named RG_VUSB_EN.
Memory Card / Bluetooth LDO (Vbt)

The VBT LDO is a linear regulator that could source 150mA (max) with 1.5V, 1.8V, .5V or .8V output for memory card or
Bluetooth module. It is controlled independently by the register named RG_VBT_EN.
Camera Analog LDO (Vcama)

The Vcama LDO is a linear regulator that could source 150mA (max) with 1.5V, 1.8V, .5V or .8V output which is selected
by the register named VCAMA_SEL[1:0]. It supplies the analog power of the camera module. Vcama is controlled
independently by the register named RG_VCAMA_EN.
Camera Digital LDO (Vcamd)

The Vcamd LDO is a linear regulator that could source 75mA (max) with 1.3V, 1.5V, 1.8V or .8V output which is selected
by the register named VCAMD_SEL[1:0]. It supplies the digital power of the camera module. Vcamd is controlled
independently by the register named RG_VCAMD_EN.
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