AAT3608 Compact Seven-Channel Regulatorwith Li+/Polymer Linear Battery Charger and I2C Interface

The AAT3608 is a member of Skyworks' Total Power Management IC (TPMIC™) product family. It contains a single-cell lithium ion/polymer battery charger, two 800mA switching regulators, and five low dropout (LDO) regulators in a small Pb-free 40-pin 5mmx5mm TQFN package, making it ideal for portable space-constrained systems. The single-input linear charger powers up from an adapter or a USB port. The adapter charge current is programmable with an external resistor or pin selectable between 100mA and 500mA when connected to a USB port. The device integrates a load switch for dynamic power path and features deep sleep mode operation. The step-down regulators are monolithic synchronous converters integrating the compensation network and soft start circuitry. The 1.5MHz operating frequency enables the use of tiny 2.2μH inductors and small 4.7μF output capacitors. External resistors set the output voltage for Buck 1 and Buck 2; the output voltage of Buck 2 is dynamically adjustable with I2C. The LDO regulators feature 3% output voltage accuracy over the full operating temperature range. The fast control loop of the LDO regulators also provide excellent transient response with a typical output voltage deviation of 1.5%. The AAT3608 provides protection features to safeguard from over-temperature operation, over-current operation, and a digital thermal loop to protect the battery during battery charging. The device is rated over an ambient temperature range of -40°C to 85°C.

技术特性

2.7V to 5.5V Operating Input Voltage Range
Adapter or USB Single Input Linear Charger
Battery Charger Digital Thermal Regulation
Battery Temperature Monitoring
Battery Charger Includes Programmable Timer
Input Load Switch
Dual 800mA Monolithic Switching Converters
1.5MHz Switching Frequencies
95% Efficiency
Independent Input Power and Ground
Buck1 Output Programmable With External Resistors
Buck 2 Feedback Voltage is Dynamically Adjustable between 0.5V and 0.7V with I2C Interface
Five Channel LDO Regulators
300mA, Output Adjustable via Two Logic Inputs
80mA, Output Adjustable via I2C Interface
50mA, 2.5V Output Voltage
50mA, 3.3V Output Voltage
80mA with 1.2V Fixed Output
3% Accuracy and 1.5% Typical Transient Accuracy
Very Low Shutdown Current
Power-On Push Button
Status Outputs
Interrupt, Reset and Status Pins, Low Battery Flag
Separate Enable Pin for LDO2, LDO4, LDO5, and Buck2 (when mask is removed)
Over-Current and Over-Thermal Protection
5mmx5mm, 40-Pin TQFN Package

应用领域 APPLICATION

GPS
Handheld Devices
Mobile Media Players
MP3
Portable Navigation

订购信息 Ordering Information

AAT3608

AAT3608 典型应用

应用技术支持与电子电路设计开发资源下载	版本信息	大小
AAT3608 数据资料DataSheet下载:pdf	Rev.V2	2 页