900844 datasheet(71/118 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

900844

FUNCTIONAL DEVICE OPERATION

POWER SUPPLIES

Figure 36. VCC180 Detailed Internal Block Diagram

Main Features

• Uses V21 as the main power supply

• 390 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

VPNL18

VPNL18 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. VPNL18 is actively discharged during shutdown.

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

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

Table 33. VCC180CNT Register Structure and Bits Description

Name

Bits

Description

VCC180CNT (ADDR 0x43 - R/W - 0x3C)

CTLVCC180

2:0

VCC180 State Control

x0 = Reserved

x1 = Reserved

x2 = Reserved

x3 = Reserved

x4 = OFF

x5 = Low Power

x6 = Active

x7 = Active

AOACCTLVCC180

5:3

VCC180 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

VOCC180

V21

PVIN 2P1

VOUTCC180

Output Monitor

IOCC180

SPI

Interface

CIN2P1

COCC180

VOCC180

CTLVCC180

AOACCTLVCC 180

VCC180FAULT

VREF

GND2P1

Discharge

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