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AAT2610 Schematic ( PDF Datasheet ) - Advanced Analogic Technologies

Teilenummer AAT2610
Beschreibung 7-Channel PMU
Hersteller Advanced Analogic Technologies
Logo Advanced Analogic Technologies Logo 




Gesamt 30 Seiten
AAT2610 Datasheet, Funktion
General Description
The AAT2610 is a highly integrated power management
solution specifically suited for Digital Still Camera (DSC)
systems, featuring seven DC-DC switching regulators for
maximum operating efficiency.
The input operating voltage range is 1.6 to 5.5V, making
the device an ideal solution for 1-cell Li-ion batteries,
2-cell alkaline batteries, and USB and regulated AC-DC
wall adapters. All seven DC-DC switching regulators fea-
ture high efficiency light load operating mode to extend
battery life while in low power standby state.
Three different DC-DC building blocks provide maximum
design flexibility: a boost (step-up) DC-DC controller
with an output voltage range of 3.0V to 5.5V and a cur-
rent mode control buck (step-down) or boost (step-up)
DC-DC controller with an output voltage range of 2.5V to
the step-up converter (SU) output voltage and buck out-
put range of 0.6V to VIN. Dual current mode control syn-
chronous buck regulators provide low voltage, low noise
outputs required for system logic and memory. Output
voltage range is 0.6V to VIN. The Auxiliary 1 boost (step-
up) is ideally suited for LCD backlight and can drive 1-6
white LEDs with ±10% accuracy. PWM input controls LED
dimming across the frequency range from 10% to 100%
duty cycle. The integrated OVP and SCF feature protects
the device from open-circuit LED conditions.
The Auxiliary 2 boost (step-up) and Auxiliary 3 buck-
boost (inverting) output provide low noise (30mVpp)
+15V and -7.5V outputs for CCD loads. An expensive
transformer is not required.
No external MOSFETs and low profile TQFN55-40L pack-
age are ideal to save space for DSC solution. Integrated,
low RDS(ON) power MOSFETs provide output voltages from
0.6V to 16VDC and an inverting output up to -10V. The
high switching frequency ensures small external filtering
components. Internal compensation is provided for opti-
mum transient performance and minimum application
design effort.
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Features
• Input Voltage Range 1.6 to 5.5V
1-Cell Li-ion, 2-Cell Alkaline
Adapter or USB Inputs
• 7 Channel up to 96% High Efficiency DC/DCs
Adjustable Output
4 Channel Synchronous Rectification
Light Load Mode for High Efficiency
• <1μA Total Quiescient Current
• Current Mode Control
Fast, Stable Transient Response
No External Compensation
Current Limit for Internal MOSFET Protection
• High Frequency 1.5MHz System Clock
• High Voltage Series LED Driver
1 to 6 White LEDs
External Schottky Diode
±10% Accuracy Current Sink
Integrated OVP
PWM Dimming: 1k to 30kHz, 10 to 100% Duty
Cycle
• Step-Up and Inverting Outputs for CCD
Low Noise Outputs
Transformerless Inverter Output
• Flexible Sequencing Implementation
Independent Enable Control
10ms Pre-Programmed Buck or Boost Delay
• Integrated Soft-Start
• Over-Voltage and Over-Temperature Protection
• Pb-free TQFN55-40L Package
• Temperature Range: -40°C to +85°C
Applications
• DSCs and DVCs
• MP3 Players
• PMP
2610.2008.11.1.1
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1






AAT2610 Datasheet, Funktion
Pin Configuration
FBL2 1
FBSD1 2
PVSD1 3
LXSD1 4
PGSD1 5
PGM 6
LXM 7
PVM 8
FBM 9
SEQ 10
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
30 FBSD2
29 PVSD2
28 LXSD2
27 PGSD2
26 PGSU
25 LXSU
24 PVSU
23 FBSU
22 SCF
21 ENSU
Absolute Maximum Ratings1
Symbol
Description
All other pins to GND/PGND
Voltage from LXL1, LXL2 to GND/PGND
Voltage from LXL3 to GND/PGND
Operating Junction Temperature Range
Maximum Soldering Temperature (at leads, 10 sec)
Thermal Information2
Symbol
PD
θJA
Description
Maximum Power Dissipation3
Maximum Thermal Resistance
Value
-0.3 to 6.0
-0.3 to 30.0
-8.0 to 6.0
-40 to 150
300
Units
V
V
V
°C
°C
Value
2.0
25.0
Units
W
°C/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. Mounted on 1.6mm thick FR4 circuit board.
3. Derate 40mW/°C above 2°C ambient temperature
6
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AAT2610 pdf, datenblatt
Typical Characteristics
AUX1 Efficiency vs. PWM Duty Cycle
(4 WLEDs; L = 4.7μH; COUT = 1μF; 10kHz PWM Control)
90
80
70
60
50 VBAT = 1.8V
40 VBAT = 2.4V
VBAT = 2.7V
30 VBAT = 3.0V
20 VBAT = 3.6V
10
VBAT = 4.2V
VBAT = 5.0V
0
0 2 4 6 8 10 12 14 16 18 20
LED Current (mA)
AUX3 Efficiency vs. Output Current
(VAUX3 = -7.5V; L = 4.7μH; COUT = 4.7μF)
80
75
70
65
60 VBAT = 1.8V
VBAT = 2.4V
55 VBAT = 2.7V
50
VBAT = 3.0V
VBAT = 3.6V
45 VBAT = 4.2V
VBAT = 5.0V
40
1
10
Load Current (mA)
100
SU Load Regulation vs. Output Current
(VSU = 5V; L = 2.2μH; COUT = 22μF)
0.020
0.015
0.010
0.005
0.000
-0.005
-0.010
-0.015
-0.020
-0.025
-0.030
-0.035
-0.040
-0.045
-0.050
0
Bypass mode
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
200 400 600 800 1000 1200 1400 1600
Load Current (mA)
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
AUX2 Efficiency vs. Output Current
(VAUX2 = +15V; L = 4.7μH; COUT = 4.7μF)
90
85
80
75
70
65
60
55
50
45
40
1
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
10 100
Output Current (mA)
AUX1 PWM Duty Cycle vs. LED Current
(4 WLEDs; L = 4.7μH; COUT = 1μF; 10kHz PWM Control)
20
16
12
8
4
0
0
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.6V
VBAT = 4.2V
VBAT = 5.0V
10 20 30 40 50 60 70 80 90 100
Duty Cycle (%)
Main SD Load Regulation vs. Output Current
(VPVM = VBAT; VMSD = 3.3V; L = 3.3μH; COUT = 4.7μF)
0.05
0.04
0.03
0.02
0.01
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
0.00
-0.01
-0.02
-0.03
-0.04
Dropout Mode
-0.05
0
50 100 150 200 250 300 350 400
Load Current (mA)
12
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