2742BS–PMGMT–03/04
Features
•
DC to DC Step Down 1.2 A, 0.9V (Dynamically Adjustable to 0.87V/1.1V/1.2V)
•
DC to DC step Down 1.2 A, 1.2V (Dynamically Adjustable to 1.0V/1.1V/1.3V) or 1.75V
(Dynamically Adjustable 1.65V/1.70V/1.80V)
•
DC to DC Step Down 1.2 A, 1.8V (Dynamically Adjustable to 1.70V/1.75V/1.85V) or
2.5V (Dynamically Adjustable 2.3V/2.4V/2.6V)
•
DC to DC Step Up/Down 520 mA, 3.3V (Dynamically Adjustable to 3.0V/3.1V/3.4V)
•
Dual Battery Chargers: Li+ Precharge, Fast Charge, Top-up Charge, 4.1V (or
Adjustable), Processor Tuned Algorithms
– USB Trickle Charge: Precharge Flat Battery from USB Pre-enumeration, then Auto-
wake of Processor at 3.8V Battery Level
– Battery Charge Select: 25 mA to 500 mA
– Real-time Charge Inhibit: Allows Charge Suspend (e.g. During TX Slots)
•
Supply Monitor of Four Power Sources: Thermistors, Temperature, DC/DC Rails, all
Supplied with Out-of-regulation Threshold Detection
•
SIM Interface: SIM / USIM, 1.8V / 3.0V Standards, Integrated TX and RX Data FIFO
•
SPI Control Interface: Up to 13 MHz; Tuned for SA1110/PXA250/PXA255 1.2 MHz SPI,
128 8-bit Registers
•
Power on Reset: For SA1110/PXA250/PXA255 Architectures plus Additional
Sequenced System Level Resets
•
Voltage and Temperature Supervision
•
Calibrated Voltage Reference
•
8-bit ADC with 5-input Multiplexer
•
Integrated Oscillator, Start-up and Self-protection Circuitry
•
Off Power: 60 µA with External “Button Select” for Restart
•
Applications Include: PDAs, PCMCIA Cards, SMART Phones, Pocket PCs, 3G
Applications, Intel
®
XScale™ Powered Applications
Description
The AT73C203 device provides an integrated solution to portable and handheld appli-
cations built around microprocessors requiring “smart” power management functions,
such as PDAs, Palmtop computers, point-of-sales terminals, 3G modems, etc.
Its compact package outline and small size of external components make the
AT73C203 suitable for PCMCIA card power management as well.
The AT73C203 integrates a power switch controller that, when connected to an exter-
nal power switch, may be used for automatically selecting one of four possible power
sources:
• Internal battery
• External battery
• Plugtop power supply unit 5V (PSU)
• PC Host USB supply
The power switch output (VDD-PSU line) is connected directly to external auxiliary
components such as a radio or any other “current hungry” module.
The AT73C203 is also equipped with four digital rails from VDD-PSU to supply a base-
band chip, a reset generator for the baseband chip, and a SPI interface to control the
AT73C203 via an internal register set. The USIM interface allows the application pro-
cessor to communicate with and control a USIM card. Charge control enables the
application processor to charge the battery from the PSU or USB. A state machine
can also determine whether to charge the internal battery through USB at start-up.
Additionally, hardware monitoring gives information to the application processor when
a voltage drop occurs (programmed via internal registers).
Power
Management
AT73C203
Power
Management IC
for Datacom
Platforms
Summary
Note: This is a summary document. A complete document
is available on our Web site at www.atmel.com.
