AS3654

austriami crosyst ems

Product Brief, Confidential

www.austriamicrosystems.com (ptr)

Revision 1.2.1 / 20060613

1 - 3

1

General Description

The AS3654 is a highly integrated solution for

power supply generation and monitoring, battery

management including charging. It is controlled via

a serial control interface and integrates all

necessary system specific functions such as clock,

reset and interrupt generation, voltage and

temperature monitoring.

2

Key Features

System Control

−

Serial Control Interface

−

On/Off Control Module

−

Reset Generation for system controller

−

Programmable Interrupt Controller

−

Watchdog

−

Low power off mode (9µA; 2.5V LDO on)

Supply Voltage Generation

−

1 RF Programmable Low Noise LDOs

(400mA)

−

1 RF Programmable Low Noise LDOs

(150mA)2 RF Programmable Low Noise

LDOs (150mA)

−

2 Programmable Digital Low Power LDOs

(200mA)

−

2 General Purpose PWM DC/DC step up

converter with two programmable current

sinks (e.g. for white led)

−

3 General Purpose high efficiency DC/DC

step down converter

−

1 Low noise charge pump with 5V output

voltage

−

1 Ultra Low Power 2.5V LDO (always on)

Current sinks

−

4 programmable(6-bit) from 0.625 to 40mA

optional useable as GPIOs

−

3 programmable high voltage (15V) (6-bit)

from 0.625 to 40mA

−

internal PWM generator

10-bit Successive Approximation ADC

−

40µs conversation time

Battery Management

−

Full featured chemistry independent step

down charger with included Gas Gauge and

Current limitation

−

0.2 Ω Battery switch for start-up during

trickle charging

−

Integrated USB charger up to 400mA

Power Management Features

−

Wide Battery Supply Range 3.0…5.5V

−

On-Chip Bandgap Tuning for High

Accuracy (±1%)

−

Current protection

−

Thermal Protection with internal

temperature sensor

Audio

−

18 Bit Audio DAC

−

Two Digital Audio Inputs (I2S interface)

−

2.9V low Noise LDO for Audio DAC

−

Headphone Amplifier Output with GND

separation

−

GND Buffer for Headphone Amplifier

−

Line/ Headphone output with GND

separation

Programmable System clock

−

1.6 MHz to 2.3 MHz with 100 kHz steps

Package

−

BGA100 9x9mm, 0.8mm pitch

3

Application

Power Management Unit

1 Cell Li+ or 3 Cell NiMH powered devices

Car battery powered systems with and without

internal battery

Product Brief, Confidential

AS3654

Power Management Unit with 18 Bit Audio DAC + Headphone

Amplifier, DCDC Charger, 3 Buck DCDCs, 3 Boost DCDCs, 5 LDOs,

Current Sinks, ADC