pcf50603 NXP Semiconductors, pcf50603 Datasheet - Page 10

• Manufacturer Part Number: pcf50603
• Description: Controller For Power Supply And Battery Management
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8
8.1
8.1.1
The PCF50603 has four operating states (see Fig.3):
8.1.2
The OOC generates an internal and an external reset each
time the system goes from STANDBY to ACTIVE state. All
registers for the regulators and converters are reset to their
default values.
2003 Oct 31
handbook, full pagewidth
NOPOWER
SAVE
STANDBY
ACTIVE.
Controller for power supply
and battery management
FUNCTIONAL DESCRIPTION
On/off control
O
R
ESET GENERATION
PERATING STATES
V SAVE > V VERY_LOW_BACK
V BAT < V VERY_LOW_BAT
V CHG > V VERY_LOW_BAT
SAVE
AND
OR
Fig.3 State diagram.
10
The RSTHC_N is kept LOW for minimum 10 ms after
entering the ACTIVE state. If the IOREG supply is
switched off, RSTHC_N becomes LOW again (see Fig.4).
A special condition occurs when the main battery voltage
drops below the V
RSTHC_N is asserted in order to shut down the host
controller immediately (see Fig.5).
V SAVE < V VERY_LOW_BACK
V CHG < V VERY_LOW_BAT
V BAT < V VERY_LOW_BAT
V BAT > V VERY_LOW_BAT
V BAT > V LOW_BAT
NOPOWER
STANDBY
ACTIVE
AND
AND
VERY_LOW_BAT
MDB681
limit of typically 2.7 V; the
Preliminary specification
PCF50603