SC900841JVKR2 Freescale Semiconductor, SC900841JVKR2 Datasheet - Page 74

• Manufacturer Part Number: SC900841JVKR2
• Description: IC POWER MGT 338-MAPBGA
• Manufacturer: Freescale Semiconductor

Specifications of SC900841JVKR2

• Applications: PC's, PDA's
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 338-TBGA
• Input Voltage: 2.8 V to 4.4 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

VDDQ Status/Control Registers and Bits Description
default state for each of these registers.
V21
Buck PWM voltage-mode control DC/DC regulator.
the load conditions. These modes can be set through the SPI
and include a PFM mode, an Automatic Pulse Skipping mode,
and a PWM mode. The previous selection is optimized to
maximum battery life based on load conditions.
Main Features
• Uses the V
• It is used as a pre-regulator to many LDO rails, for enhanced
• Uses Integrated MOSFETs
• 4.0 MHz switching frequency
74
900841
Table 33. VDDQ Status and Control Register Structure and Bits Description
FUNCTIONAL DEVICE OPERATION
POWER SUPPLIES
AOACCTLVDDQ
Reference the register map for read/write conditions and
This is a 4.0 MHz fully integrated 2-switch synchronous
The switcher can operate in different modes depending on
efficiency and reduced thermal dissipation.
CTLVDDQ
Reserved
Name
PWR
Bits
rail as its power supply
2:0
5:3
7:6
VDDQ State Control
x0 = Reserved
x1 = Reserved
x2 = Reserved
x3 = Reserved
VDDQ State Control during AOAC Exit (when 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
Reserved
V
21
C
O21
C
IN 21
V
PWR
L
21
Figure 29. V21 Detailed Internal Block Diagram
VDDQCNT (ADDR 0x37 - R/W - Default Value: 0x04)
PGND21
PVIN 21
SW21
FB21
V
Internal
Compensation
REF
I
Z1
SENSE 5
Driver
EA
Z2
down.
ADC, and stored in a register for the processor to access.
protection purposes. If an over-current condition is detected,
the regulator will limit the current through cycle by cycle
operation and alert the system through the V21FAULT signal,
which will in turn assert the VRFAULT Interrupt signal.
• High efficiency operating modes depending on load
• Output can be discharged through the low side switch.
• Peak current sensing with over-current protection
• Uses internal compensation
• Gate drive circuits are supplied directly from VPWR
Controller
V21 will be discharged every time the regulator is shutting
The output current is measured internally, digitized by the
The peak current is sensed internally for over-current
conditions
Description
x4 = OFF
x5 = PFM
x6 = Automatic Pulse Skipping
x7 = PWM
x4 = OFF
x5 = PFM
x6 = Automatic Pulse Skipping
x7 = PWM
AOACCTLV21
V21FAULT
CTLV21
Analog Integrated Circuit Device Data
Interface
SPI
Freescale Semiconductor