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PDF AAT2601 Data sheet ( Hoja de datos )
| Número de pieza | AAT2601 | |
| Descripción | Total Power Solution | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
General Description
The AAT2601 is a member of AnalogicTech’s Total Power
Management ICTM (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 handheld portable GSM or CDMA mobile
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, charge termination current, and recharge volt-
age are programmable with an external resistor and/or
by a standard I2C interface.
The step-down DC/DC converter is integrated with internal
compensation and operates at a switching frequency of
1.5MHz, thus minimizing the size of external components
while keeping switching losses low and efficiency greater
than 95%. All LDO output voltages are programmable
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.
All six voltage regulators operate with low quiescent cur-
rent. The total no load current when the step-down con-
verter and 2 LDOs are enabled is only 170μA.
The AAT2601 is available in a thermally enhanced low
profile 5x5x0.8mm 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
▪ 170μA (typ) w/ Buck (Core), LDO1 (PowerDigital),
and LDO2 (PowerAnalog) Active, No Load
• One Step-Down Buck Converter (Core)
▪ 1.8V, 300mA Output
▪ 1.5MHz Switching Frequency
▪ Fast Turn-On Time (120μs typ)
• Five LDOs Programmable with I2C
▪ LDO1: 3.0V, 300mA (PowerDigital)
▪ LDO2: 3.0V, 150mA (PowerAnalog or PLL)
▪ LDO3: 3.0V, 150mA (TCXO)
▪ LDO4: 3.0V, 150mA (TX)
▪ LDO5: 3.0V, 150mA (RX)
▪ PSRR: 60dB@10kHz
▪ Noise: 50μVrms for LDO3, LDO4, and LDO5
• 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)
• Adapter OK (ADPP) and Reset (RESET) Timer Outputs
• Separate Enable Pins for Supply Outputs
• Over-Current Protection
• Over-Temperature Protection
• 5x5mm TQFN55-36 Package
Applications
• Digital Cameras
• GSM or CDMA Cellular Phones
• Handheld Instruments
• PDAs and Handheld Computers
• Portable Media Players
2601.2008.01.1.0
www.DataSheet.in
www.analogictech.com
1
1 page  
PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
Absolute Maximum Ratings1
TA = 25°C unless otherwise noted.
Symbol
VIN
Power and logic pins
TJ
TS
TLEAD
Description
Input Voltage, CHGIN, BAT
Maximum Rating
Operating Junction Temperature Range
Storage Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Recommended Operating Conditions2
Symbol
θJA
PD
Description
Thermal Resistance
Maximum Power Dissipation
Value
-0.3 to 6.5
VIN + 0.3
-40 to 85
-65 to 150
300
Units
V
V
°C
°C
°C
Value
25
4
Units
°C/W
W
1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at conditions other than the operating conditions
specified is not implied. Only one Absolute Maximum rating should be applied at any one time.
2. Thermal Resistance was measured with the AAT2601 device on the 4-layer FR4 evaluation board in a thermal oven. The amount of power dissipation which will cause the
thermal shutdown to activate will depend on the ambient temperature and the PC board layout ability to dissipate the heat. See Figures 11-14.
2601.2008.01.1.0
www.analogictech.com
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PRODUCT DATASHEET
AAT2601178
Total Power Solution for Portable Applications
Typical Characteristics—Charger (continued)
Constant Current Mode Charge Current
vs. Temperature
(VBAT = 3.6V; RISET = 1.24kΩ)
900
VCHGIN = 6.0V
800
VCHGIN = 4.5V
700
VCHGIN = 5.5V
600
500 VCHGIN = 5.0V
400
300
-50
-25
0 25 50
Temperature (°C)
75 100
Constant Current Mode Charge Current
vs. Input Voltage
(RSET = 1.24kΩ)
900
880
860
840
820 VBAT = 3.3V
800
780
760 VBAT = 4.1V VBAT = 3.6V
740
720
700
4.5
4.75
5
5.25 5.5 5.75
6
CHGIN Voltage (V)
2601.2008.01.1.0
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| PDF Descargar | [ Datasheet AAT2601.PDF ] | |
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