900844 Datasheet, PDF (77/118 Pages) Freescale Semiconductor, Inc – Integrated Power Management IC for Ultra-mobile and Embedded Applications

FUNCTIONAL DEVICE OPERATION
POWER SUPPLIES
PVIN 1P5
(Shared with VCCPAOAC, VCCPDDR,
VMM, and VCCP)
VOAON
VOUTAON
Controller
_
VREF
+
Z
CTLVAON
AOACCTLVAON
SPI
Interface
COAON
V OAON
I OAON
Output Monitor
VAONCFAULT
GND1 P5
(Shared with VCCPAOAC , VCCPDDR,
VMM, and VCCP)
Discharge
Figure 42. VAON Detailed Internal Block Diagram
Main Features
• Uses V15 as the main power supply
• 250 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 39. VAON Control Register Structure and Bits Description
Name
Bits
Description
VAONCNT (ADDR 0x45 - R/W - Default Value: 0x07)
CTLVAON
2:0 ^{VAON State Control}
x0 = Reserved
x1 = Reserved
x2 = Reserved
x3 = Reserved
x4 = OFF
x5 = Low Power
x6 = Active
x7 = Active
AOACCTLVAON 5:3 ^{VAON 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
VMM
VMM 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. VMM will be actively discharged during shutdown.
VMM shares an input voltage pin (PVIN1P5) and a reference ground pin (GND1P5) with the VCCPAOAC, VCCPDDR, VAON,
and VCCP regulators, yet each has independent control. PVIN1P5 is supplied from V15 voltage.
Analog Integrated Circuit Device Data
Freescale Semiconductor
900844
77