AS3654 Datasheet, PDF (1/3 Pages) ams AG – Power Management Unit with 18 Bit Audio DAC + Headphone Amplifier, DCDC Charger, 3 Buck DCDCs, 3 Boost DCDCs, 5 LDOs, Current Sinks, ADC

AS3654
Product Brief, Confidential
austriamicrosystems
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
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
www.austriamicrosystems.com (ptr)
Revision 1.2.1 / 20060613
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