Twl6030 Core Smps Outputs; Twl6030 V1V8 Smps Output; Twl6030 V2V1 Smps Output; Twl6030 Vmem Smps Output - pandaboard OMAP4460 ES System Reference Manual

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System reference manual (83 pages)

Table Of Contents

Table of Contents

2.5.1

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

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

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

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

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

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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OMAP4460 Pandaboard ES

System Reference Manual