AS3658

Product Brief

www.austriamicrosystems.com (ptr)

Revision 1.4 / 20071217

1 - 3

AS3658

Power and Audio Management Unit for Portable Devices

Product Brief

1

General Description

The AS3658 is highly integrated power and audio

management unit. It includes all the features from

the AS3654 and adds on top an 16 bit Audio ADC,

a second headphone amplifier, a microphone bias

with amplifier, a RTC with alarm and time function,

an unique ID block and three more LDOs.

2

Key Features

System Control

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

−

Serial Control Interface

On/Off Control Module with Boot-ROM /

GPIO

Reset Generation for system controller

Programmable Interrupt Controller and

Watchdog

Low power off mode (9

μA; 2.5V LDO on)

88 bit unique ID or Boot fuse array

Reset with long ON-Keypress (5s, SW-

Interuptable)

Touchscreen Interface (10 bit, interrupt)

Supply Voltage Generation

2 RF Programmable Low Noise LDOs

(250mA)

(1 LDO can be a current controlled switch

for hotplug (200mA +/-40%))

1 RF Programmable Low Noise LDO

(400mA)

4 Programmable Dig. Low Power

LDOs(200mA)

2 General Purpose PWM DC/DC step up

converter with three programmable current

sinks (e.g. for white led); for current mode

feedback is automatically slected

(DCDC_CURR1,2,3)

3 General Purpose high efficiency DC/DC

step down converter (DCDC 1 support

DVM)

1 Low noise charge pump with 5V output

voltage

1 Ultra Low Power 2.5V LDO (always on)

Current sinks

4 programmable(8-bit) from 0.15mA to

38.25mA (+/-5% ) optional useable as

GPIOs

3 programmable high voltage (15V) (8-bit)

from 0.15mA to 38.25mA (+/-5% )

internal PWM generator (extended time

range)

(can control DCDC_CURR1,2,3)

10-bit 40

μs Successive Approximation ADC

Two external Inputs (ADC_IN1, ADC_IN2)

Battery Management

Full featured chemistry independent step

down charger with Gas Gauge and Current

limitation

High Current (1.0A) Linear Charger with

external pass transistor (no SD charger)

0.1

Ω Battery switch for start-up and trickle

charge

Integrated USB charger up to 880mA (can

be used as wall adapter charger); current

accuracy 440-500mA for USB specification,

in-circuit trimmable (+/-1.2% trimsteps)

Autonomous Battery Temperature

Supervision (0°C-45°C or 0°C- 50°C) for

10k and 100k NTC

Charging Timeout (1h-8h in 30min steps)

Charging in Stanby mode

Completely Autonomous (no SW)

Power Management Features

Wide Battery Supply Range 3.0…5.5V

High Accuracy Reference (±1%)

Thermal and Current Protection (int.

sensor)

Standby Mode exit by interrupt

e.g.Onkey/RTC

Audio

94dB Audio DAC, 16-48kHz sampling rate

Two Digital Audio Inputs (2 x I2S interface)

2.9V low Noise LDO for Audio DAC

Two Headphone Amplifier Output with GND

separation

Two I2S Inputs and one I2S Output

I2S master mode with programmable

sample rate (controlled by internal PLL)

GND Buffer for Headphone Amplifier

Line/ Headphone outputs with GND

separation

Audio ADC, 82dB SNR with 16ksps

Mono Microphone Supply and Amplifier

5 Band Adjustable Audio Equalizer (+/-

12dB in 3dB gain steps)

SPDIF Output

Audio Mixer and Gain Stages

PCM Interface

Real Time Clock (RTC)

Alarm and Time function

Repeated Wakeup (every sec. or minute)

32kHz output

Backup Battery Charger and Switchover

Programmable System clock

1.6 MHz to 2.3 MHz with 100 kHz steps

Package

BGA124 8x8mm, 0.5mm pitch (can be

assembled without microvia boards)

3

Application

PDA, PMP, GPS-Navigation System

1 Cell Li+ or 3 Cell NiMH powered devices