900844 datasheet(70/118 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

900844

FUNCTIONAL DEVICE OPERATION

POWER SUPPLIES

VCCA shares an input voltage pin (PVIN1P8) and a reference ground pin (GND1P8) with VBG regulator, yet each has

independent control. PVIN1P8 is supplied from the VDDQ voltage if VDDQ output is set to 1.8 V, otherwise connect to V21 when

VDDQ is set to 1.5 V.

Figure 35. VCCA Detailed Internal Block Diagram

Main Features

• Uses VDDQ or V21 as the main power supply

• 150 mA maximum continuous output current

• Optimized for a 2.2 µF external filter capacitor with a maximum of 10 m

Ω ESR

• Uses an internal pass FET

• The output for each LDO is monitored for over-current conditions and under-voltage events

VCC180

VCC180 is a low drop-out (LDO) fully integrated regulator with a P-CH Pass FET. It is high performance, low noise, and high

PSRR, with a low quiescent current and fast transient response. VCC180 is actively discharged during shutdown.

VCC180 shares an input voltage pin (PVIN2P1) and a reference ground pin (GND2P1) with VPNL18 and VPMIC regulators,

yet each has independent control. PVIN2P1 is supplied from the V21 voltage.

The output current for VCC180 is measured and reported through the ADC. Reference ADC Subsystem for more information.

Table 32. VCCA Control Register Structure and Bits Description

Name

Bits

Description

VCCACNT (ADDR 0x40 - R/W - Default Value: 0x3C)

CTLVCCA

2:0

VCCA State Control

x0 = Reserved

x1 = Reserved

x2 = Reserved

x3 = Reserved

x4 = OFF

x5 = Low Power

x6 = Active

x7 = Active

AOACCTLVCCA

5:3

VCCA State Control during AOAC Exit (when the Exit pin is EXITSTBY pin is asserted). These bits will be initialized

by the system SPI controller after power up.

X0 = Do not copy

x1 = Do not copy

x2 = Do not copy

x3 = Do not copy

x4 = OFF

x5 = Low Power

x6 = Active

x7 = Active

Reserved

7:6

Reserved

Controller

VOCCA

PVIN 1P8

(Shared with VBG)

VOUTCCA

Output Monitor

IOCCA

SPI

Interface

COCCA

VOCCA

CTLVCCA

AOACCTLVCCA

VCCAFAULT

VREF

Discharge

FBCCA

GND1P8

(Shared with VBG)

900844 Datasheet(PDF) 70 Page - Freescale Semiconductor, Inc

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