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Integrated Load Switches - 34026 AAT2601178

Total Power Solution for Portable Applications

General Description Features

The AAT2601 is a member of AnalogicTech’s Total Power Management IC • Voltage Regulator V
IN Range: 4.5V to 6V• Complete Power Integration
TM (TPMIC
TM ) product family. It contains a single-cell Lithium Ion/Polymer battery charger, a fully integrated step-down converter and 5 low dropout (LDO) regulators. The device also includes 2 load switches for dynamic power path/sleep mode operation, making it ideal for small handheld portable GSM or CDMA mobile telephones.The battery charger is a complete thermally regulated constant current/constant voltage linear charger. It includes an integrated pass device, reverse blocking pro- tection, high accuracy current and voltage regulation, charge status, and charge termination. The charging current, charge termination current, and recharge volt- age are programmable with an external resistor and/or by a standard I Integrated Load Switches to Power Converters from AC Adapter or Battery Automatically• Low Standby Current 170A (typ) w/ Buck (Core), LDO1 (PowerDigital), and LDO2 (PowerAnalog) Active, No Load• One Step-Down Buck Converter (Core) 1.8V, 300mA Output 1.5MHz Switching Frequency Fast Turn-On Time (120s typ)• Five LDOs Programmable with I
2 C LDO1: 3.0V, 300mA (PowerDigital) LDO2: 3.0V, 150mA (PowerAnalog or PLL) LDO3: 3.0V, 150mA (TCXO)
2 C interface. LDO4: 3.0V, 150mA (TX) LDO5: 3.0V, 150mA (RX) The step-down DC/DC converter is integrated with internal compensation and operates at a switching frequency of 1.5MHz, thus minimizing the size of external components while keeping switching losses low and efficiency greater than 95%. All LDO output voltages are programmable using the I PSRR: 60dB@10kHz Noise: 50Vrms for LDO3, LDO4, and LDO5• One Battery Charger Digitized Thermal Regulation Charge Current Programming up to 1.4A
2 C interface. Charge Current Termination Programming The five LDOs offer 60dB power supply rejection ratio (PSRR) and low noise operation making them suitable for powering noise-sensitive loads.All six voltage regulators operate with low quiescent cur-rent. The total no load current when the step-down con- verter and 2 LDOs are enabled is only 170A.The AAT2601 is available in a thermally enhanced low profile 5x5x0.8mm 36-pin TQFN package. Automatic Trickle Charge for Battery Preconditioning (2.8V Cutoff)• Adapter OK (ADPP) and Reset (RESET) Timer Outputs • Separate Enable Pins for Supply Outputs• Over-Current Protection• Over-Temperature Protection• 5x5mm TQFN55-36 Package

Applications

• Digital Cameras• GSM or CDMA Cellular Phones• Handheld Instruments• PDAs and Handheld Computers• Portable Media Players
2601.2008.01.1.0 www.analogictech.com 1