STW4810CRAT/LF ST-Ericsson Inc, STW4810CRAT/LF Datasheet - Page 35

• Manufacturer Part Number: STW4810CRAT/LF
• Description: IC PWR MNGMNT MULTIMEDIA 84VFBGA
• Manufacturer: ST-Ericsson Inc

Specifications of STW4810CRAT/LF

• Applications: Processor
• Current - Supply: 170µA
• Voltage - Supply: 2.7 V ~ 4.8 V
• Operating Temperature: -30°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 84-VFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional description
4.3
4.3.1
34/78
Power management module
STw4810 includes several regulators that supply the multimedia processor and its
peripherals. All regulators can work in different modes depending on the processor needs.
When the STw4810 is in ‘low current mode’”, the output current is reduced to save energy
via the lower quiescent current. The nominal mode is called high power mode (HPM). The
mode is selected by PWREN signal according to both multimedia processor and STw4810
state.
When PWREN = “0”, sleep mode is selected. HPM is selected as default when PWREN =
“1”.
Each regulator has a dedicated battery power supply. It can be powered down by a signal
called PDN_regulator_name as shown in the
mode, the regulator is switched off and only a leakage current is present (max. 1µA).
VCORE, VAUX and VPLL output voltages are programmable, through main I2C interface,
using the “Regulator”_SEL[x:0] bits of the power control registers (
In addition, an output current limitation prevents high current delivery in case of output short
circuit.
All multimedia processor power supplies have the same soft start to prevent leakage in the
multimedia processor device during the start-up phase. There is an exception with VAUX
which can be started independently.
Bandgap, biasing and references
Figure 10. Block diagram of biasing and references of the device
BG
Voltage reference
Bias generator
control
Figure 2: STw4810 block diagram
Table 22
to
Table 27
All internal
references
All internal
biasing
VREF_18
STw4810
. In this
).