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PDF AAT2603 Data sheet ( Hoja de datos )
| Número de pieza | AAT2603 | |
| Descripción | Total Power Solution | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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PRODUCT DATASHEET
AAT2603
Total Power Solution for Portable Applications
General Description
The AAT2603 is a highly integrated power management
solution for handheld mobile systems. It provides six
regulated voltages from a single-cell Lithium-ion/poly-
mer battery or a 5V supply.
The six outputs are produced by six regulators; two
switching step-down regulators and four low-dropout
(LDO) regulators. Each voltage regulator has its own
independent enable pin.
The high efficiency step-down regulators are fully inte-
grated and switch at a high 1.5 MHz fixed frequency.
They automatically transition to variable frequency
operation at light loads for improved efficiency. DC-DC1
(Buck1) is designed for high output current and low
dropout voltage (200mV at 1.2A). DC-DC2 (Buck2) is a
600mA regulator with a two step dynamic output voltage
capability. One option allows the output voltage of
DC-DC2 (Buck2) to be set to either 1.0V or 1.3V with the
SELB2 logic pin.
LDO regulators LDO1 and LDO2 can supply up to 400mA
of load current with output voltages adjustable down to
1.5V. LDO regulators LDO3 and LDO4 can supply up to
200mA of current and provide good noise and power sup-
ply rejection. LDO3 and LDO4 have output voltages exter-
nally adjustable down to 1.2V.
The AAT2603 is available in a Pb-free thermally enhanced
28-pin TQFN44 package and is rated for operation over
the -40°C to +85°C temperature range.
Features
• VIN Range: 2.7V to 5.5V
• Two Step-Down Regulators
▪ DC-DC1(Buck1): 1.2A, Low Dropout Voltage
• Externally Adjustable: VFBB1 = 0.6V
▪ VOUT Range: 0.6V to VINB1
• Fixed: VOUT = 3.3V
▪ Factory Programmable to any Two Voltage
Levels from 0.6V to 4.0V
• DC-DC2(Buck2): 0.6A, Low Dropout Voltage
• Externally Adjustable: VFBB2 = 0.6V
▪ VOUT Range: 0.6V to VINB2
• Fixed: VOUT = 1.0V[SELB2=’0’]/1.3V[SELB2=’1’]
▪ Factory Programmable to any Two Voltage
Levels from 0.6V to 4.0V
▪ Fixed 1.5MHz Switching Frequency
▪ Internally Compensated Current Mode Control
▪ High Efficiency over the Entire Load Range
▪ Four LDO Regulators
• LDO1: 400mA LDO
• LDO2: 400mA LDO
• LDO3: 200mA, Low Noise LDO
• LDO4: 200mA, Low Noise LDO
• Fast Turn-On and Turn-Off time
• Short Circuit and Over-Current Protection
• Over-Temperature Protection
• Temperature Range: -40°C to +85°C
• TQFN44-28 Package
Applications
• Handheld GPS
• Handheld Instruments
• PDAs and Handheld Computers
• Portable Media Players
• Smart Phones
2603.2008.06.1.0
www.DataSheet.in
www.analogictech.com
1
1 page  
PRODUCT DATASHEET
AAT2603
Total Power Solution for Portable Applications
Electrical Characteristics1
VAIN = VINB1 = VINB2 = VINL12 = VINL34 = 3.6V, CBYP = 10nF, TA = -40°C to 85°C, unless noted otherwise. Typical values are
at TA = 25°C.
Symbol Description
Conditions
Power Supply
VIN
IQ
ISHDN
Input Voltage Range
Quiescent Current
Input Shutdown Current
VENB1 = VENL3 = 3.6V, No Load , VFBB1 = VFBL3 = 3.6V
VENx = AGND
VIN rising
UVLO Under-Voltage Lockout
VIN falling
Hysteresis
FOSC Oscillator Frequency
tS,BYP
Bypass Filter Startup Time
VENB1 = 3.6V
DC-DC1 (Buck1): 1.2A Step-Down Converter
VOUT_RANGE Output Voltage Range
VOUT_ACC Output Voltage Accuracy
TA = 25°C, 20mA Load
TA = -40°C to 85°C, 20mA Load
VOUT_TOL Output Voltage Tolerance
0A to 1.2A Load; VIN = 2.7V to 5.5V
VFBB1_ACC Feedback Voltage Accuracy
TA = 25°C, 20mA Load
TA = -40°C to 85°C, 20mA Load
ΔVOUT/ΔIOUT Load Regulation
0A to 1.2A Load
ΔVOUT/ΔVIN Line Regulation
VIN = 2.7V to 5.5V
ISHDN
Shutdown Current
VENB1 = GND
ILX_LEAK
LX Leakage Current
VINB1 = 5.5V, VLX1 = 0V to VINB1
ILIM P-Channel Current Limit
RDS(ON)H High Side Switch On-Resistance
RDS(ON)L Low Side Switch On-Resistance
tS Start-Up Time
Enable to Output Regulation
DC-DC2 (Buck2): 600mA Step-Down Converter
VOUT_RANGE
VOUT_ACC
VOUT_TOL
VFBB2_ACC
ΔVOUT/ΔIOUT
ΔVOUT/ΔVIN
ISHDN
ILX_LEAK
ILIM
RDS(ON)H
RDS(ON)L
tS
Output Voltage Range
Output Voltage Accuracy
Output Voltage Tolerance
Feedback Voltage Accuracy
SELB2 = '0
Feedback Voltage Accuracy
SELB2 = '1'
Load Regulation
Line Regulation
Shutdown Current
LX Leakage Current
P-Channel Current Limit
High Side Switch On-Resistance
Low Side Switch On-Resistance
Start-Up Time
TA = 25°C, 20mA Load
TA = - 40°C to 85°C, 20mA Load
0mA to 600mA Load; VIN = 2.7V to 5.5V
TA = 25°C, 20mA Load
TA = -40°C to 85°C, 20mA Load
TA = 25°C, 20mA Load
TA = -40°C to 85°C, 20mA Load
0mA to 600mA Load
VIN = 2.7V to 5.5V
VENB2 = GND
VINB2 = 5.5V, VLX2 = 0 to VINB2
Enable to Output Regulation
Min
2.7
1.8
0.6
-1.5
-2.5
-3.0
0.591
0.585
0.6
-1.5
-2.5
-3.0
0.591
0.585
0.763
0.756
Typ Max
5.5
100 200
1.0
2.6
250
1.5
200
0.6
0.6
0.4
0.2
1.7
145
200
200
VINB1
+1.5
+2.5
+3.0
0.609
0.615
1.0
1.0
0.6
0.6
0.775
0.775
0.2
0.2
1.3
230
180
200
VINB2
+1.5
+2.5
+3.0
0.609
0.615
0.787
0.794
1.0
1.0
Units
V
μA
μA
V
V
mV
MHz
μs
V
%
%
%
V
V
%
%/V
μA
μA
A
mΩ
mΩ
μs
V
%
%
%
V
V
%
%/V
μA
μA
A
mΩ
mΩ
μs
1. The AAT2603 is guaranteed to meet performance specification from -40°C to +85°C and is assured by design, characterization and correlation with statistical process controls.
2603.2008.06.1.0
www.analogictech.com
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PRODUCT DATASHEET
AAT2603
Total Power Solution for Portable Applications
Typical Characteristics—DC-DC2 (Buck2)
Load Transient
(VOUTB2 = 1.3V; VIN = 3.6V; IOUTB2 = 300mA to 600mA; CFF = 100pF)
0.05
0
-0.05
1
0.5
0
Line Transient
(VOUTB2 = 1.3V; VIN = 3.6 to 4.2V; IOUTB2 = 300mA)
6 0.3
5 0.25
4 0.2
3 0.15
2 0.1
1 0.05
00
-1 -0.05
-2 -0.1
Time (20µs/div)
Time (50µs/div)
Soft-Start
(VOUTB2 = 1.3V; VIN = 3.6V; IOUTB2 = 600mA)
4
2
0
1.5
1
0.5
0
Time (100µs/div)
2603.2008.06.1.0
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| Páginas | Total 26 Páginas | |
| PDF Descargar | [ Datasheet AAT2603.PDF ] | |
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