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Mini power management device combines step-down converter, two LDOs

Sunnyvale, Calif. — Advanced Analogic Technologies, Inc. (AnalogicTech) has introduced the AAT2504, an adjustable 3-channel regulator that combines a step-down converter with two low dropout linear regulators (LDOs). Targeted at mobile devices with rapidly changing feature sets, the AAT2504 allows designers to extend system functionality and still benefit from power management integration, said AnalogicTech.

The step-down converter delivers up to 800 mA of output current and supports an input range of 2.7 V to 5.5 V. A 2-MHz switching frequency helps minimize the size of external components. Efficiency exceeds 95%. By tying the MODE/SYNC pin high, designers can enable an optional PWM-only operation, which maintains constant frequency and low output ripple across all load conditions, said AnalogicTech. In addition, the converter can be synchronized to an external clock via the MODE/SYNC pin.

The two LDOs operate across an input range of 1.8 V to 5.5 V, making them suitable for post-regulating from the step-down converter. Each LDO has an independent input and delivers up to 300 mA. Through an external feedback pin, designers can program each LDO's output voltage from 0.6 V to 3.6 V. A Power OK (POK) function provides an open drain output signal when LDOA is within regulation.

The AAT2504 features low 80 μA typical no-load quiescent current when all 3 regulators are on. The device also features under-voltage lockout and over-temperature protection. Qualified across the -40°C to +85°C temperature range, the AAT2504 is available in a Pb-free, 20-pin, QFN34 package.

Pricing: $1.75 in quantities of 1,000.
Product information: AAT2504

Advanced Analogic Technologies, Inc. , www.analogictech.com

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