General Description
The AAT2806 is a dual charge pump designed to support both the white LED backlight and flash applications for systems operating with lithium-ion/polymer batteries. The backlight charge pump is capable of driving up to four LEDs at a total of 80mA. The current sinks may be operated individually or in parallel for driving higher current LEDs. To maximize power efficiency, the charge pump operates in 1X, 1.5X, or 2X mode, where the mode of operation is automatically selected by comparing the forward voltage of each LED with the input voltage. AnalogicTech's S2Cwire™ (Simple Serial Control™) serial digital input is used to enable, disable, and set current for each LED with an eight-level logarithmic scale plus four low-current settings down to 50μA for optimized efficiency, with a typical operating quiescent current of less than 50μA.
The flash charge pump is a charge pump doubler with a regulated output voltage. It is designed to deliver 120mA of continuous current and up to 250mA of pulsed current. It has an independent
enable pin for improved power savings.
The AAT2806 has thermal protection and built-in softstart circuitry. A low-current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1μA.
The AAT2806 is available in a Pb-free, space-saving, thermally-enhanced TDFN44-16 package and is rated over the -40°C to +85°C temperature range.

*VIN Range: 2.7V to 5.5V
*Dual Charge Pump to Support Backlight and Flash LEDs
*Backlight Charge Pump:
-Regulated Current
-Four Current Sink Inputs
-S2Cwire Brightness Control
-Tri-Mode Charge Pump
-Maximum 20mA of Current Per Input
-Low IQ (50μA) in Light Load Mode
*Flash Charge Pump:
-Regulated Output Voltage
-Up to 250mA of Pulsed Current
*Independent Backlight/Flash Control
*Low Noise 1MHz Constant Frequency Operation
*Automatic Soft Start
*No Inductors
*Available in TDFN44-16 Package

*Color (RGB) Lighting
*White LED Backlighting
*White LED Photo Flash


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General Description
The AAT1218 is a general purpose DC/DC synchronous boost (step-up) converter providing a tightly regulated DC output voltage for continuous output currents up to 1A (minimum). Operating input voltage must be less than the output voltage and in the 0.5V to 5.5V range, making the device well suited to portable equipment and consumer appliances.
The boost output voltage is programmed from 2.5V to 5.5V with an external resistor divider. Optimized internal compensation provides fast transient response with no external components.
Synchronous rectification eliminates the need for an external rectifier for output voltage less than 4.5V. Low on-resistance internal switches provide efficiency up to 95%, which minimizes losses and simplifies packaging and circuit board layout. An inductor, two resistors and two ceramic output capacitors are all that are required to implement a DC/DC boost solution.
The switching frequency is internally set to 1.2MHz to minimize external filter size and optimize switching losses.
Integrated soft-start ensures minimal inrush current. The “anti-ring” circuit reduces stray EMI during light load, discontinuous operation. Input quiescient current is less than 400μA at no load.
The device provides cycle-by-cycle current limit and overtemperature protection to prevent device over-stress.
The AAT1218 is available in a Pb-free, 12-pin low profile TDFN33 package or a 12-pin TSOPJW package; both packages are rated from -40°C to 85°C.

*2.5V to 5.5V Adjustable Output Voltage
*0.5V Minimum Input Voltage
*±2% Output Accuracy
*No Schottky Diode Required (VOUT < 4.5V)
*Up to 95% Efficiency
*400μA Standby Current
*<1μA Shutdown Current
*Integrated Soft-Start Circuitry Limits Inrush Current
*Constant Frequency 1.2MHz Operation
-Inductor Height <1.8mm
-Small Ceramic Capacitors
*Anti-ring Circuit Reduces EMI
*Current Mode Control
-Fast, Stable Transient Response
-No External Compensation
-Cycle-by-Cycle Current Limit
*Low Inrush Current with 0.7ms Soft-start
*Low Output Ripple: <80mVpp for all Loading Conditions (BW = 25MHz)
*Over-Temperature Protection
*Adjustable and Fixed Output Versions Available
*Delivers 1A to 5V Output from a Single Cell Li+ Battery
*Low-profile TDFN33-12 or TSOPJW-12 Package

*DVD Players
*Hard Disk Drive
*MP3 Players
*Portable Computers
*Smart Phones

AAT1218ITP-1.2-T1, AAT1218ITP-3.3-T1, AAT1218ITP-5.0-T1, AAT1218IWP-1.2-T1

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General Description
The AAT4674/4674-1 are members of Analogic - Tech’s Application Specific Power Management SmartSwitch™ family.
These devices are dual input single output power supply selector switches designed to operate from batteries, or any other power supply with an input voltage up to 6V.
The AAT4674/4674-1 connects the supply voltage on IN1 to OUT, or IN2 to OUT, through a very low RDS(ON) power MOSFET that minimizes voltage drops and power dissipation. The enable (EN) and select (SEL) pin voltages control the operational state of the internal power MOSFET switches.
Once enabled, the SEL pin will switch between the IN1 and IN2 inputs. If both input voltages are below the UVLO, then the AAT4674 output floats. In the case of the AAT4674-1, if one of the input voltages is above the UVLO threshold then that input voltage that is above the UVLO threshold is passed through to the output.
The two power switches are current limited and the current limit thresholds can be programmed through the resistors on IIN1 and IIN2 pins respectively.
The AAT4674/4674-1 are available in thermally enhanced, space-saving Pb-free 12-pin TSOPJW packages. The AAT4674/4674-1 are specified for operation over the -40°C to +85°C temperature range.

• Input Voltage Supply Range: 2.5V to 6V
• High Level of Integration:
- Reverse Blocking Diode
- Current Sensing
- Programmable Current Limit
- Single Control Pin Switching
• Break-Before-Make Switch-Over
- Minimum Output Voltage Drop During
• Shutdown Current < 1μA
• Thermal Protection
• TSOPJW-12 Package

• Bluetooth™ Headsets
• Cell Phones
• Digital Still Cameras
• MP3 Players
• Personal Data Assistants (PDAs)
• Set Top Boxes


TAG Supply, Switch

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General Description
The AAT1145 SwitchReg™ is a 1.5MHz constant frequency current mode PWM step-down converter. It is ideal for portable equipment requiring very high current up to 1.2A from single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load conditions.
The AAT1145 also can run at 100% duty cycle for low dropout operation, extending battery life in portable systems while light load operation provides very low output ripple for noise sensitive applications.
The AAT1145 can supply up to 1.2A output load current from a 2.5V to 5.5V input voltage and the output voltage can be regulated as low as 0.6V. The high switching frequency minimizes the size of external components while keeping switching losses low. The internal slope compensation setting allows the device to operate with smaller inductor values to optimize size and provide efficient operation.
The AAT1145 is available in adjustable (0.6V to VIN) and fixed (1.8V) output voltage versions. The device is available in a Pb-free, 3x3mm 10-lead TDFN package and is rated over the -40°C to +85°C temperature range.

• Input Voltage Range: 2.5V to 5.5V
• Output Voltages from 0.6V to VIN
• 1.2A Output Current
• High Efficiency: Up to 95%
• 1.5MHz Constant Switching Frequency
• Low RDS(ON) Internal Switches: 0.15Ω
• Allows Use of Ceramic Capacitors
• Current Mode Operation for Excellent Line and Load
Transient Response
• Short-Circuit and Thermal Fault Protection
• Soft Start
• Low Dropout Operation: 100% Duty Cycle
• Low Shutdown Current: ISHUTDOWN < 1μA
• TDFN33-10 Package
• -40°C to +85°C Temperature Range

• Cellular Phones
• Digital Cameras
• DSP Core Supplies
• PDAs
• Portable Instruments
• Smart Phones
TAG Converter

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General Description
The AAT2847 is a highly integrated power solution for single cell Li-Ion/Polymer based liquid crystal display (LCD) display applications. It includes a four channel light emitting diode (LED) backlight driver and two integrated 200mA low dropout voltage regulators (LDOs) as additional power supplies for display and camera related chipsets.
The backlight driver in the AAT2847 is a low noise tri-mode DC/DC charge pump converter. Each of the four channels of the backlight driver is capable of delivering up to 20mA of bias currents for white LEDs. The white LED (WLED) backlight bias current matching is 1% which helps provide uniform display brightness.
AnalogicTech’s AS2Cwire™ (Advanced Simple Serial Control™) serial digital interface is used to enable, disable, and set the current for each backlight LED channel. Each LED channel has sixteen available current level settings in three separate current scales, plus four available current level settings on a low level current scale.
Each LED channel is equipped with built-in short circuit protection and auto disable functionality. A low shutdown current feature disconnects the load from the input and reduces quiescent current to less than 1μA.
The AAT2847 is available in the thermally enhanced 20-pin 3x4x0.75mm TQFN package.

• Input Supply Voltage Range: 2.7V to 5.5V
• Tri-Mode (1X/1.5X/2X) Charge Pump:
- Delivers up to 120mA of Output Current
• Integrated LCD Display Solution:
- Four-Channel WLED Backlight
• User-Programmable WLED Current Scales: 30mA, 20mA and 15mA.
- Sixteen Programmable Current Level Settings
• User Selectable Low Level Current Scale
- Four Programmable Current Level Settings
- Dual 200mA LDOs (w/Separate Enables)
• Single-Wire AS2Cwire Serial Interface for Configuration/Control
- Four Addressable Registers
- Fast, 1MHz Serial Interface
• > 90% Peak Efficiency
• LDO Output Voltages:
- AAT2847-EE: User-Programmable
- AAT2847-QG: 2.8V and 1.5V
- AAT2847-QI: 2.8V and 1.8V
• Over-Temperature Protection
• Available in 3x4x0.75mm TQFN34-20 Package
• -40°C to +85°C Temperature Range

• Camera Function Power Supplies
• Camera Phone Displays
• LCD Modules
• White LED Backlighting


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General Description
The AAT3663 BatteryManager™ is a member of AnalogicTech’s Total Power Management IC™
family. This device is an integrated single/dual cell Lithium-Ion (Li-Ion) / polymer battery charger IC designed to operate from USB ports or an AC adapter inputs up to an input voltage of 13.2V.
AAT3663 precisely regulates battery charge voltage and current for 4.2V and 8.4V Li-Ion battery
cells. The battery charging current is user programmed up to 1A by an external resistor.
Battery charge state is continuously monitored for fault conditions. A Digital Thermal Loop Control maintains the maximum possible battery charging current for the optimum set of input to output power dissipation and ambient temperature conditions. In the event of an over-current, over-voltage, shortcircuit, or over-temperature fault condition, the device will automatically shut down, thus protecting the charger and the battery under charge.
Two status monitor output pins are provided to indicate the battery charge status by directly driving external LEDs. Additionally, an open-drain powersource detection output (ADPP#) is provided to report presence of an input power supply
The AAT3663 is available in a thermally enhanced, space-saving, 14-pin 3x3 mm TDFN package and is specified for operation over the -40°C to +85°C temperature range.

• 4.0V ~ 13.2V Input Voltage Range
• Compatible with USB or AC Adapter Sources
• Programmable Fast Charge Current from 100mA to 1A
• Programmable Charge Termination Current
• Digital Thermal Loop Charge Reduction
• Less Than 0.4μA Battery Leakage Current
• Programming Charge Timer
• Battery Temperature Sensing
• Battery Temp Sense Open Circuit Detection
• Automatic Recharge Sequencing
• Automatic Trickle Charge for Battery Pre-Conditioning
• Automatic Charge Termination Shutdown/Sleep Mode
• Less than 1μA Shutdown Current
• Over-Voltage and Over-Current Protection
• Power On Reset and Soft Start
• 3x3mm 14-pin TDFN Package

• Bluetooth™ Headset
• Cell Phones
• Digital Still Cameras
• MP3 Players
• Personal Data Assistants (PDAs)
• Other Li-Ion Battery Powered Devices


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General Description
The AAT1235 is a highly integrated, high efficiency power solution for white LED backlight and keypad backlights in mobile/portable devices. It is based on a switching boost converter which steps up the singlecell lithium-ion/polymer battery voltage to drive 5 strings of series-connected white LEDs with precision current regulation. The AAT1235 is capable of driving a total of four LEDs per channel.
The boost converter can produce an output drive of up to 24V at 100mA. The high switching frequency (up to 2MHz) provides fast response to load transients and allows the use of small external components.
A fully integrated control circuit simplifies the design and reduces total solution size.
AnalogicTech's Advanced Simple Serial Control™ (AS2Cwire™) serial digital input is used to individually turn each output sink on/off and adjust the LED current by group. Unlike conventional pulse width modulation (PWM) control of LED brightness, the AAT1235 drives the LEDs with constant, non-pulsating current.
A similar device is also available with an I2C twowire interface; please see the AAT1236 datasheet.
The AAT1235 is available in a Pb-free, thermallyenhanced 16-pin 3x4mm TDFN package and is
specified for operation over the -40°C to +85°C temperature range.

• Input Supply Voltage Range: 2.7V to 5.5V
• Maximum Boost Output Drive: Up to 24V at 100mA
• Up to 85% Efficient Operation
• Up to 2MHz Switching Frequency with Small Inductor
• User-Programmable Full-Scale LED Current, Up to 30mA
• Single-Wire AS2Cwire Serial Interface
— Five Addressable Registers
• Independent LED Current Control by Group
— Backlight Group B1-B2, 16 Settings
— Auxiliary Group A1-A3, 16 Settings
• Independent LED ON/OFF Control
— Fast, 1MHz Serial Interface
• Non-Pulsating, High-Performance LED Current Drive for Uniform Illumination
— 10% Absolute Accuracy
— 2% Channel-to-Channel Matching
• Over-Voltage and Over-Temperature Protection
• Automatic Soft-Start Minimizes Large Inrush Current at Startup
• Available in 3x4mm TDFN34-16 Package

• Digital Still Cameras (DSCs)
• Keypad Backlight
• Large Panel Displays
• Mobile Handsets
• Personal Media Players
• PDAs and Notebook PCs
• White LED Backlight

TAG Driver, Keypad, led

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General Description
The AAT1162 is an 800kHz high efficiency stepdown DC/DC converter. With a wide input voltage range of 4.0V to 13.2V, the AAT1162 is an ideal choice for dual-cell Lithium-ion battery-powered devices and mid-power-range regulated 12V-powered industrial applications. The internal power switches are capable of delivering up to 1.5A to the load.
The AAT1162 is a highly integrated device, simplifying system-level design. Minimum external components are required for the converter.
The AAT1162 optimizes efficiency throughout the entire load range. It operates in a combination
PWM/Light Load mode for improved light-load efficiency.
The high switching frequency allows the use of small external components. The low current shutdown feature disconnects the load from VIN and drops shutdown current to less than 1μA.
The AAT1162 is available in a Pb-free, space-saving, thermally-enhanced 16-pin TDFN34 packageand is rated over an operating temperature range of -40°C to +85°C.

• Input Voltage Range: 4.0V to 13.2V
• Up to 1.5A Load Current
• Fixed or Adjustable Output:
 -Output Voltage: 0.6V to VIN
• Low 115μA No-Load Operating Current
• Less than 1μA Shutdown Current
• Up to 96% Efficiency
• Integrated Power Switches
• 800kHz Switching Frequency
• Soft Start Function
• Short-Circuit and Over-Temperature Protection
• Minimum External Components
• TDFN34-16 Package
• Temperature Range: -40°C to +85°C

• Distributed Power Systems
• Industrial Applications
• Laptop Computers
• Portable DVD Players
• Portable Media Players
• Set-Top Boxes
• TFT LCD Monitors and HDTVs


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General Description
The AAT2513 is a high efficiency dual synchronous step-down converter for applications where power efficiency, thermal performance and solution size are critical. Input voltage ranges from 2.7V to 5.5V, making it ideal for systems powered by single-cell lithium-ion/polymer batteries. Each converter is capable of 600mA output current and has its own enable pin. Efficiency of the converters is optimized over full load range. Total no load quiescent current is 60μA, allowing high efficiency even under light load conditions.
The integrated power switches are controlled by pulse width modulation (PWM) with a 1.7MHz typical switching frequency at full load, which minimizes the size of external components. Fixed frequency, low noise operation can be forced by a logic signal on the MODE pin. Furthermore, an external clock can be used to synchronize the switching frequency of both converters.
A phase shift pin (PS) is available to operate the two converters 180° out of phase at heavy load to achieve low input ripple.
The AAT2513 is available in a Pb-free, thermally enhanced 16-pin QFN33 package and is specified for operation over the -40°C to +85°C temperature range.

• VIN Range: 2.7V to 5.5V
• Output Current:
— Channel 1: 600mA
— Channel 2: 600mA
• 96% Efficient Step-Down Converter
• Low No Load Quiescent Current
— 60μA Total for Both Converters
• Integrated Power Switches
• 100% Duty Cycle
• 1.7MHz Switching Frequency
• Optional Fixed Frequency or External SYNC
• Logic Selectable 180° Phase Shift Between the Two Converters
• Current Limit Protection
• Automatic Soft-Start
• Over-Temperature Protection
• QFN33-16 Package
• -40°C to +85°C Temperature Range

• Cellular Phones / Smart Phones
• Digital Cameras
• Handheld Instruments
• Micro Hard Disc Drives
• Microprocessor / DSP Core / IO Power
• PDAs and Handheld Computers


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General Description
The AAT1217 a high efficiency, synchronous, fixed frequency, step-up converter designed for singlecell or dual-cell alkaline, NiMH, or NiCd batterypowered applications. The high 1.2MHz switching frequency and completely integrated control circuitry minimize the total solution footprint area while maintaining excellent regulation, ripple, and transient response throughout the full load range.
Pulse skipping mode operation and low quiescent current allow the AAT1217 to maintain high efficiency performance for light load and sleep mode conditions. With a 1.2A peak switch current limit, the AAT1217 is capable of delivering 100mA to the load from a single AA cell or up to 400mA from dual AA cells. The AAT1217 has a 0.85V start-up voltage with operation down to 0.5V.
The AAT1217 is available in a Pb-free, space-saving low profile (1mm) 6-pin TSOT23 package and is rated over the -40°C to +85°C ambient temperature range.

• VIN Operation Range: 0.5V to VOUT
• VOUT Range: 2.5V to 5.5V
• 100mA Output from a Single AA Cell Input
• 400mA Output from a Dual AA Cell Input
• High Efficiency: Up to 93% Efficiency
• Low Start-Up Voltage: 0.85V Typical
• Internal Synchronous Rectifier
— VOUT ≤ 4.5V: No External Schottky Diode
• Fixed Frequency Pulse Width Modulation (PWM) Current-Mode Control Scheme with Internal Compensation
• 1.2MHz Fixed Switching Frequency
• 1.2A Current Limit
• Light Load Pulse Skipping Mode Operation
• Low 80μA No Load Input Current
• Over-Current Protection
• EMI Reduction Anti-Ringing Control Circuitry
• Low Shutdown Current: <1.0μA
• -40°C to +85°C Ambient Temperature Range
• Low Profile (1mm) TSOT23-6 Package

• Cellular and Smart Phones
• Digital Still and Video Cameras
• Microprocessors and DSP Core Supplies
• MP3 Player
• Portable Instruments
• Wireless and DSL Modems


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