900844 Datasheet, PDF (70/118 Pages) Freescale Semiconductor, Inc – Integrated Power Management IC for Ultra-mobile and Embedded Applications

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.
PVIN 1P8
(Shared with VBG)
VOC C A
VOUTCCA
COCCA
FBCCA
GND1P8
(Shared with VBG)
Controller
_
V REF
+
Z
VOC C A
I OCCA
Output Monitor
Discharge
CTLVCCA
AOACCTLVCCA
SPI
Interface
VCCAFAULT
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 mΩ ESR
• Uses an internal pass FET
• The output for each LDO is monitored for over-current conditions and under-voltage events
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
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.
900844
70
Analog Integrated Circuit Device Data
Freescale Semiconductor