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PDF AAT2610 Data sheet ( Hoja de datos )
| Número de pieza | AAT2610 | |
| Descripción | 7-Channel PMU | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
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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
www.DataSheet.in
www.analogictech.com
1
1 page  
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
Pin Descriptions
Number
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
EP
Symbol
SCF
FBSU
PVSU
LXSU
PGSU
PGSD2
LXSD2
PVSD2
FBSD2
VREF3
FBL3
PVL3
LXL3
PVL
LXL2
PGL
LXL1
CSL1
OVL1
Description
Open drain, active low, short circuit flag output. SCF goes open when overload protection or AUX_L1 open
circuit occur during abnormal operation or during startup. SCF can drive P-channel MOSFETs to disconnect
a given output from the load.
Step-up (SU) boost converter feedback pin. This pin is high impedance when the SU controller is disabled.
Connect an external resistor divider between this pin and SU output and GND to set the SU output voltage
with 0.6V.
Step-up (SU) boost converter input.
Step-up (SU) boost converter switching node. Connect this pin to the external inductor and anode of the
Schottky rectifying diode. This pin is high impedance when the SU converter is disabled.
Step-up (SU) boost converter power ground. Tie this pin to ground plane.
Step-down 2 (SD2) buck converter power ground pin. Tie this pin to ground plane.
Step-down 2 (SD2) buck converter switching node. Connect this pin to an external inductor. This pin is
high impedance when the SD2 converter is disabled.
Step-down 2 (SD2) buck converter input pin. Bypass this pin to GND plane with a 1μF ceramic capacitor.
Step-down 2 (SD2) buck converter feedback pin. This pin is high impedance when the SD2 controller is
disabled. Connect an external resistor divider between this pin and SD2 output and GND to set the SD2
output voltage with 0.6V.
Auxiliary 3 (AUX_L3) buck/boost (inverting) reference voltage pin. Bypass VREF3 to GND with a 1μF or
greater capacitor. Connect an external resistor divider between this pin and L3 output and FBL with 0.6V.
Auxiliary 3 (AUX_L3) boost converter feedback pin. The pin is high impedance when the AUX_L3 control-
ler is disabled. Connect an external resistor divider between this pin and AUX_L3 output and VREF3 pin to
set the AUX_L3 negative buck/boost (inverting) output voltage with 0V.
Auxiliary 3 (AUX_L3) buck/boost (inverting) input node. Connect this pin to the input ceramic capacitor.
Auxiliary 3 (AUX_L3) buck/boost (inverting) switching node. Connect this pin to the cathode of the exter-
nal Schottky diode and buck/boost inductor.
Power input for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to PVSU.
Auxiliary 2 (AUX_L2) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
Power ground for auxiliary (AUX_L1, AUX_L2, AUX_L3) channels’ power FET driver. Tie this pin to ground
plane.
Auxiliary 1 (AUX_L1) boost (step-up) switching node. Connect this pin to the anode of the external
Schottky diode and boost inductor.
Auxiliary 1 (AUX_L1) boost converter current sink pin. The pin is high impedance when the AUX_L1 con-
troller is disabled. Connect this pin to the cathode of the bottom LED in the string to ensure DC current
flow. Current level is programmed by the internal RSET resistor from 1 to 20mA.
Auxiliary 1 (AUX_L1) boost (step-up) over-voltage protection pin. Connect an external resistor divider be-
tween this pin and AUX_L1 output voltage and GND to set the AUX_L1 over-voltage threshold with 0.6V.
Exposed pad (bottom). Connect to ground directly beneath the package for thermal dissipation.
2610.2008.11.1.1
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5
5 Page 
Typical Characteristics
100
95
90
85
80
75
70
65
60
55
50
1
SU Efficiency vs. Output Current
(VSU = 5V; L = 2.2μH; COUT = 22μF)
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
10 100
Output Current (mA)
1000
MSU Efficiency vs. Output Current
(VMSU = 3.3V; L = 2.2μH; COUT = 10μF)
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
1
VBAT = 1.8V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
10 100 1000
Output Current (mA)
SD2 Efficiency vs. Output Current
(VPVSD2 = VBAT; VSD2 = 1.8V; L = 2.2μH; COUT = 4.7μF)
100
95
90
85
80
75
70
65
60
55
50
1
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
10 100 1000
Output Current (mA)
PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
MSD Efficiency vs. Output Current
(VPVM = VBAT; VMSD= 3.3V; L = 3.3μH; COUT = 4.7μF)
100
95
90
85
80
75
70
65
60
55
50
45
40
35
30
1
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
10 100 1000
Output Current (mA)
SD1 Efficiency vs. Output Current
(VPVSD1 = VBAT; VSD1 = 2.5V; L = 2.2μH; COUT = 10μF)
100
95
90
85
80
75
70
65
60
55
50
1
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
10 100 1000
Output Current (mA)
SD2 Efficiency vs. Output Current
(VSD2 = 1.2V; L = 2.2μH; COUT = 4.7μF)
95
90
85
80
75
70
65
60
55
50
1
VBAT = 2.0V
VBAT = 2.4V
VBAT = 2.7V
VBAT = 3.0V
VBAT = 3.3V
VBAT = 3.6V
VBAT = 3.8V
VBAT = 4.2V
VBAT = 5.0V
10 100
Output Current (mA)
1000
2610.2008.11.1.1
www.DataSheet.in
www.analogictech.com
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| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AAT2610.PDF ] | |
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