AS3604

austriami crosyst ems

Preliminary Product Brief and AS3603/04 Delta Sheet, Confidential

www.austriamicrosystems.com (ptr)

Revision 1.0 / 20060505

1 - 4

General Description

The AS3604 is based on the architecture of the

AS3603. It has additional functions like momentary

power loss detection, a synchronous DCDC buck

converter, charger resume operation and increased

driving capability of the LDOs.

Key Features

The AS3604 features all the functions of the

AS3603 with the following additions (marked with

boldface italcs

):

Momentary Power Loss Detection

−

Detect a short interruption (<200ms) of

the battery supply (e.g. due to a dropped

phone)

Ten Programmable High Performance LDOs

−

Two Digital Low-Power LDOs (0.75 to 2.5V,

200mA; 250mA up to 1.4V)

−

Three RF Low-Noise LDOs (1.85 to 3.4V,

200mA

)

−

Two RF Low-Noise LDOs (1.85 to 3.4V,

150mA

)

−

One SIM Low-Power LDO (3.0V, 20mA)

−

One Periphery Low-Noise LDO (2.5 to

3.2V, 200mA)

−

One Low-Power LDO (2.5V, 10mA)

Programmable High Efficiency DC/DC

Converters

−

Step-down: 0.8V-3.4V, up to 500mA with

2.2MHz operating frequency and small

external coil (2.2uH))

−

Step Up: 15V, 45mA, (for White LEDs)

Stereo Audio Power Amplifier

−

0.5W @ 4

-Stereo

−

1W @ 8

-Bridged

−

Digital Volume Control, 3dB Steps

−

Click- and Pop-Less Start-Up and Power-

Down

Complete Chemistry-Independent Battery

Charger

−

Integrated Fuel Gauge

−

Automatic Trickle Charging

−

Programmable Constant Current Charging

−

Programmable Constant Voltage Charging

−

Programmable Pulse Charging

−

Safety Functions (Low Battery Shutdown)

−

Operation without Battery

−

No-Battery Detection

−

Can regulate the current through the

battery or from the charger

−

Charger Input Overvoltage protection

(6V)

−

Shutdown even with connected charger

−

Charger Resume operation

−

Charger Interrupts (Inserted, Removed,

Overvoltage, Resume

)

Four 8-Bit Programmable Current Sources

(0.625mA to 160mA) support:

−

Buzzer

−

Vibrator

−

LEDs

Wide Battery Supply Range 3.0 to 5.5V

Four General Purpose Switches (1

and 2 )

Three

Programmable General Purpose I/O Pins

On-Chip Bandgap Tuning for High Accuracy

(±1%)

Integrated Programmable Watchdog (7.5 to

1900ms)

Programmable Reset (10 to 110ms)

Shutdown Current typ 7µA (2.5V Always On)

Overcurrent and Thermal Protection

0.35µ CMOS Solution

48-Pin, 6x6mm QFN Package (0.4mm pitch)

Almost Pin Compatible to AS3603 (only one

pin changed)

Application

Multi-standard power management for mobile

phones, PDAs, and 1-cell Li+ or 3 to 4-cell Ni-MH

powered devices.

Preliminary Product Brief and AS3603/04 Delta Sheet, Confidential

AS3604

AS3603 with Momentary Power Loss Detection, synchronous DCDC

and increased driving capability of the LDOs