AP3440数据手册集成电路（IC）的稳压器-DC-DC开关稳压器规格书PDF

描述 Description

The AP3440 is a current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 4A load with high efficiency, excellent line and load regulation.

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\tThe device integrates two N-channel power MOSFETs with low on-resistance. Current mode control provides fast transient response and cycle-by-cycle current limit.

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\tThe switching frequency of AP3440 can be programmable from 200kHz to 2MHz, which allows small-sized components, such as capacitors and inductors. A standard series of inductors from several different manufacturers are available. This feature greatly simplifies the design of switch-mode power supplies.

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\tUnder voltage lockout is internally set at 2.6V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the soft-start pin. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage.

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\tThe AP3440 is available in U-QFN3030-16 package.

应用 Application

Low-voltage, High-density Power Systems
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\t\tPoint of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
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\t\tBroadband, Networking and Optical Communications Infrastructure


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\t\t\t\tProduct Specifications