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AAT3601 Datasheet Preview

AAT3601 Datasheet

Total Power Solution

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DATA SHEET
AAT3601
Total Power Solution for Portable Applications
General Description
The AAT3601 is a member of Skyworks' Total Power
Management IC (TPMICTM) product family. It contains a
single-cell Lithium Ion/Polymer battery charger, a fully
integrated step-down converter and 5 low dropout (LDO)
regulators. The device also includes 2 load switches for
dynamic power path/sleep mode operation, making it
ideal for small portable short-range communications
enabled mobile devices and telephones.
The battery charger is a complete thermally regulated
constant current/constant voltage linear charger. It
includes an integrated pass device, reverse blocking pro-
tection, high accuracy current and voltage regulation,
charge status, and charge termination. The charging
current and the charge termination current as well as
recharge voltage are programmable with either an exter-
nal resistor and/or by a standard I2C interface.
The step-down DC/DC converter is integrated with inter-
nal compensation and operates at a switching frequency
of 1.5MHz, thus minimizing the size of external compo-
nents while keeping switching losses low and efficiency
greater than 95%. All LDO output voltages are program-
mable using the I2C interface.
The five LDOs offer 60dB power supply rejection ratio
(PSRR) and low noise operation making them suitable for
powering noise-sensitive loads. The LDOs and DC/DC
converter are separated into Permanent-Enabled (PE)
and Non-Permanent (NP) enabled supplies.
All six voltage regulators operate with low quiescent cur-
rent. The total no load current when the 3 PE LDOs are
enabled is only 200μA.
The device includes a watchdog timer input and two
reset outputs for the watchdog and LDO regulation. The
device also can be programmed through a standard I2C
interface.
The AAT3601 is available in a thermally enhanced low
profile 5x5x0.75mm 36-pin TQFN package.
Features
Voltage Regulator VIN Range: 4.5V to 6V
• Complete Power Integration
Integrated Load Switches to Power Converters from
AC Adapter or Battery Automatically
• Low Standby Current
200μA (typ) w/LDO1, LDO2 and LDO5 Active,
No Load
• One Step-Down Buck Converter (NP)
1.24V, 300mA Output
1.5MHz Switching Frequency
Fast Turn-On Time (120μs typ)
Five LDOs Programmable by I2C
LDO1: 3.4V, 150mA (PE)
LDO2: 3.4V, 300mA (NP)
LDO3: 1.24V, 300mA (PE)
LDO4: 1.85V, 300mA (NP)
LDO5: 1.85V, 300mA (PE)
PSRR: 60dB @10kHz
Noise: 50μVrms
• One Battery Charger
Digitized Thermal Regulation
Charge Current Programming up to 1.4A
Charge Current Termination Programming
Automatic Trickle Charge for Battery Preconditioning
(2.8V Cutoff)
• Watchdog (WDI) Timer Input
Two Reset (RSTIN, RSTLPW) Timer Outputs
• Separate Enable Pins for PE and NP Supplies
Digital Programming of Major Parameters via I2C
• Over-Current Protection
• Over-Temperature Protection
• 5x5x0.75mm TQFN55-36 Package
Applications
• Digital Cameras
• GSM or CDMA Cellular Phones
• Handheld Instruments
• PDAs and Handheld Computers
• Portable Media Players
• Short-Range Communication Headsets
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202210B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013
1




Skyworks

AAT3601 Datasheet Preview

AAT3601 Datasheet

Total Power Solution

No Preview Available !

Typical Application
To AVIN1,AVIN2, PVIN
SYSOUT
System Supply
500mΩ
CHGIN
5V from
AC Adapter or USB Port
10μF
To
SYSOUT
100k
STAT
STAT_BAT
ENBAT
To USE_USB
SYSOUT
100k SDA
100k SCL
WDI
μC
TEMP_FLAG
To
OUT1
To
OUT1
EN_SYS
RSTLPW
100k RSTIN
100k EN_PE
EN_NP
AVIN2
To SYSOUT
DATA SHEET
AAT3601
Total Power Solution for Portable Applications
SYSOUT
LDO
Charger
Control
Ref
I2C
and
Enable/Reset
Control
UVLO
100mΩ
BAT
10μF
+ 1 cell
- Li+
battery
VIN
Step-down
Ref BUCK
Enable
VIN
REF
TS
CT
0.1μF
ISET
10kW
NTC
For BAT
Temp sense
1.24k
To SYSOUT
PVIN
LX 2.2μH
NP 1.24V
300mA
10μF
OUTBUCK
PGND
4.7μF
CNOISE
AVIN1
To SYSOUT
0.01μF
AGND
OUT5
PE
1.85V, 300mA
10μF
OUT4
NP
1.85V, 300mA
OUT3
OUT2
PE
1.24V, 300mA
NP
3.4V, 300mA
10μF
10μF
10μF
OUT1
PE
3.4V, 150mA
22μF
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2 202210B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 20, 2013


Part Number AAT3601
Description Total Power Solution
Maker Skyworks
Total Page 30 Pages
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