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Revision 0.6
OMAP TM 4 PandaBoard System
Reference Manual
November 29, 2010
DOC-21010
2.4.2
TWL6030 V1V8 SMPS Output
The TWL6030 V1V8 SMPS provides the I/O voltage for the PandaBoard (net name VIO_1v8). This is a
1200mA SMPS that provides a 1.8V output that is used to power many balls on the OMAP4430
processor that set the I/O voltage for the device. It also sources onboard peripherals that require an
operating voltage referenced to processor I/Os.
2.4.3
TWL6030 V2V1 SMPS Output
The TWL6030 V2V1 SMPS output is used by the TWL6040 Audio Companion IC as an input for some
of its internal power supplies (specifically the high side and low side LDOs and the negative charge
pump). It is also connected to the TWL6030 as the input voltage to the VCXIO and VDAC LDOs (net
name VDD_2V1). It is a 600mA SMPS with a default output value of 2.10V.
2.4.4
TWL6030 VMEM SMPS Output
The TWL6030 VMEM output is a 600mA SMPS used to provide the operating voltage for the VDD2
LPDDR2 balls on the OMAP4430 processor (net name VDD_VMEM). These OMAP balls are feed-
throughs to the top POP footprint on the OMAP package, where they directly connect to the LPDDR2
VDD2 balls. This SMPS is a 600mA max capacity rail. The Micron LPDDR2 device used is an S4B
type device, so VDD2 is required to be 1.2V. This is set in the TWL6030 companion chip by connecting
the BOOT1 input to VRTC.
2.4.5
TWL6030 V1V29 SMPS Output
The TWL6030 V1V29 output is a 600mA SMPS used to provide the operating voltage for the VDD2
LPDDR2 balls on the OMAP4430 processor (net name VDD_VMEM). These OMAP balls are feed-
throughs to the top POP footprint on the OMAP package, where they directly connect to the LPDDR2
VDD2 balls. This SMPS is a 600mA max capacity rail. The Micron LPDDR2 device used is an S4B
type device, so VDD2 is required to be 1.2V. This is set in the TWL6030 companion chip by connecting
the BOOT1 input to VRTC, which causes V1V29 to be set to a default of 1.225V.
2.4.6
TWL6030 LDO Power Resources
The VAUX2 LDO is a programmable LDO that is only connected to pin 1 of the LCD Expansion
Connector J4. Its possible output voltage settings include 1.2V, 1.8V, 2.5V, 2.75V, and 2.8V, and its
maximum output current is 200mA. The voltage to be programmed will be dependent on the board
plugged into the LCD Expansion connectors, but will most likely be 2.8V.
The VAUX3 LDO is a programmable LDO that is only connected to pin 30 of the Camera Expansion
Connector, J17. Its possible output voltage settings include 1.0V, 1.2V, 1.3V, 1.8V, 2.5V, 2.8V, 3.0V,
and its maximum output current is 200mA. The output voltage to be utilized would depend on the
implementation of the camera module.
The VCXIO LDO is a fixed 1.8V, 200mA LDO that provides a 1.8V input to certain noise sensitive
OMAP4430 balls. The balls powered by this LDO include the VDDA_CSI2 balls (V28 and W28), the
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