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Revision 0.1
OMAP4460 Pandaboard ES
System Reference Manual
September 29, 2011
DOC-21054
2.5.1
TWL6030 Core SMPS Outputs
The TWL6030 implements three Switch Mode Power Supplies (SMPS) that source two of the three main
core voltage rails for the OMAP4460 processor. The default voltage of all of these supplies is 0.95V, and
each should be adjusted as required by S/W for the desired processor OPP.
VCORE1 is a 1200mA SMPS that is used to power the VDD_CORE balls on the OMAP4460 processor
(net name VDD_VCORE3, (34 balls total) and the VDDA_DLLn_LPDDR21 and VDDA_DLLn_
LPDDR22 balls, where n=0/1 (4 balls total). VCORE2 is a 600mA SMPS that is used to power the
VDD_IVA_AUDIO balls on the processor (net name VDD_VCORE2, 10 balls total). VCORE3 is a
600mA SMPS that is not used on the OMAP4460 Pandaboard ES.
2.5.2
TWL6030 V1V8 SMPS Output
The TWL6030 V1V8 SMPS provides the I/O voltage for the Pandaboard ES (net name VIO_1v8). This
is a 1200mA SMPS that provides a 1.8V output that is used to power many balls on the OMAP4460
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.
2.5.3
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.
2.5.4
TWL6030 VMEM SMPS Output
The TWL6030 VMEM SMPS is not used on the OMAP4460 Pandaboard ES. The LPDDR2 power balls
on the OMAP4460 that were previously connected to this rail for the OMAP4430 are connected to the
V1V29 SMPS.
2.5.5
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 OMAP4460 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.
2.5.6
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.
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