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AnalogicTech power-management ICs aimed at portable systems

Posted: 18 Apr 2002 ?? ?Print Version ?Bookmark and Share

Keywords:aat3520? aat3522? aat3524? aat3526? aat3528?

Advanced Analogic Technologies Inc. has announced additions to its Power Manager family of power management ICs that provide low quiescent current, offering portable system designers increased system reliability while reducing power consumption and component count.

The AAT3520, AAT3522, and AAT3524 microprocessor supervisory circuits operate down to 1.2V and has a quiescent current of 1.25A. They are designed to monitor the system power supply and assert a reset signal for a minimum of 150ms after Vcc has risen above a fixed threshold.

The SOT-23 devices feature a propagation delay time of <205s and detection accuracy of 11.5 percent. They also feature push-pull active high, push-pull active low, and open drain output options, and are available at fixed thresholds from 2.2V to 4.6V.

The AAT3526, AAT3527, and AAT3528 are similar to the AAT3520/2/4 devices, but add the ability to initialize a manual reset via a debounced pin. These devices support thresholds of 1.2V to 4.6V and come in SOT-143 packages.

For an additional level of protection, the AAT3532 adds a programmable watchdog timer to hold the microprocessor in reset condition for a minimum of 250 ms while Vcc is established to ensure correct system startup.

The 8-pin SOP device also support manual reset and offers a quiescent current of 235A (typ.).

In 1,000 unit quantities, the AAT3520/2/4 is priced at 32 cents. The AAT3526/7/8 is quoted at 42 cents, while the AAT3532 starts at 75 cents.

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