SC900841JVK Freescale Semiconductor, SC900841JVK Datasheet - Page 61

• Manufacturer Part Number: SC900841JVK
• Description: IC POWER MGT 338-MAPBGA
• Manufacturer: Freescale Semiconductor

Specifications of SC900841JVK

• 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

supply to the loads and the rest of the system (see
Interface and Power Path
V
Availability of V
effect of V
powered.
V
2.65 V, then the system cannot power up, and the RTC
circuitry and clock, and the keep alive registers, receive their
supply from a node, called the Best of Supply node (V
see
circuits is maintained for maximum life.
POWER STATES
states, and the conditions necessary to transition between
Analog Integrated Circuit Device Data
Freescale Semiconductor
PWR
PWR
1. V
2. V
It is important to note that the VPWR node is the main
If V
V
Figure 18
Figure
BOS
protection circuitry, reference
Power Path Management
PWR
determines what power state the 900841 IC is in.
< V
PVINCHG
BAT
represents the highest of the following voltages:
PWRUVF
: This is the main battery voltage
PWR
is less than the under-voltage falling threshold of
17. These ensure that power to these critical
shows the flow of power, the different power
PWR
voltage on how the 900841 is internally
: This is the charger input voltage after the
is discussed later. The next subject is the
Table 26. 900841 Internal Power Supply Summary
(Bandgap & Regulators Reference)
Management). The availability of
(Analog Core Supply)
(Digital Core Supply)
for more information
VCOREREF
VCOREDIG
Reference
Battery Interface and
VCORE
Battery
BOS
),
Bypass Capacitor
Bypass Capacitor
Bypass Capacitor
Output Voltage
Output Voltage
Output Voltage
Parameter
V
main internal supplies that provide power to the rest of the
circuitry can power up:
and the circuitry that was powered from V
from V
the 900841.
the different states. This diagram serves as the basis for the
description in the remainder of this section.
PWR
3. V
1. V
2. V
3. V
If V
Notice that when V
The following table summarizes the voltage references on
battery
voltage for all internal circuitries.
circuitry.
circuitry.
PWR
> V
COREDIG
COINCELL
COREREF
CORE
COREDIG
PWRUVR
is available and valid (V
: This is the supply for the 900841 analog
.
: This is the supply for the 900841 digital
: This is the main bandgap and reference
: This is the coin cell battery voltage, backup
COREDIG
100 nF typ.
2.2 μ F typ.
2.2 μ F typ.
2.775 V
Target
1.2 V
1.5 V
FUNCTIONAL DEVICE OPERATION
POWER STATES AND CONTROL
is > 1.2 V, a switch is closed,
PWR
> 3.0 V), then the
BOS
is now powered
900841
61