Santa Clara, Calif.Advanced Analogic Technologies Inc. (AnalogicTech) has developed mini-Power Management Units (PMUs) that combine three step-down DC/DC converters in a single monolithic IC.
Targeted at portable devices with rapidly evolving feature sets, the 3-channel AAT2784 and AAT2785 allow designers to add one 1.5A synchronous step-down converter and two 300 mA synchronous step-down converters or one 1.5A synchronous step-down converter and two 600 mA synchronous step-down converters, respectively, without radically altering their existing core system design or adding numerous discrete devices.
The AAT2784 and AAT2785 operate off an input voltage range of 2.7 to 5.5V. Outputs are adjustable from 0.6V to VIN. Both devices employ a unique low noise architecture that reduces output ripple by 25% and spectral noise by up to 50%.
With efficiency levels exceeding 95%, the new devices help reduce power consumption and extend battery life. Quiescent current is a low 50 µA/channel. Transient response time is typically < 20 µs.
Each of the three regulators in the AAT2784 and AAT2785 has an independent enable pin. A high 1.8 MHz switching frequency helps minimize the size of external components and reduce PCB footprint.
An integrated internal soft start function limits current surge at the input and eliminates output voltage overshoot. Both devices also feature over-temperature and current-limit protection. The AAT2784 and AAT2785 are qualified across the -40°C to +85°C temperature range. Both ICs are available in a Pb-free, 16-pin TDFN34 package.
Pricing: The AAT2784 sells for $1.70 and the AAT2785 sells for $1.84, both in 1K quantities.
Advanced Analogic Technologies Inc., www.analogictech.com