PRODUCT DATASHEET
AAT2610
7-Channel PMU for Digital Still Cameras
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 V
IN
. 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 V
IN
. 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 R
DS(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.
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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