AP3409DNTR-G1 Integrated Circuits (ICs)

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The AP3409DNTR-G1 is a synchronous current-mode PWM step-down converter from Diodes inc. This integrated circuit (IC) utilizes a single inductor design to provide a wide input voltage range (6V to 28V) and a wide adjustable output voltage range (0.6V to 5.5V). It is used to power a variety of applications such as digital and analog integrated circuits, lighting, LCD displays, and portable battery powered devices.

The AP3409DNTR-G1 features a wide operating input voltage range, high peak efficiency over a wide load range, low output ripple noise, and adjustable output (via external resistive divider). It is ideal for small, low power applications. The device also features current-mode control with internal compensation, a power-on reset circuit that provides an asserted reset to the system soft-start circuit, and an integrated soft-start capable of current limiting.

The AP3409DNTR-G1 can operate in both discontinuous and continuous conduction modes. In discontinuous conduction mode, the inductor current is equal to the load current, and the device goes into “idle” when the output voltage and the current requirements of the load are met. In continuous conduction mode, the inductor current is greater than the load current, reducing the current ripple at the output of the regulator.

The AP3409DNTR-G1’s internal power MOSFET provides good efficiency and improved transient response. It has a pulse-width modulation frequency range of 1kHz to 3MHz, with an integrated 32KHz/13pF low-noise oscillator that is synchronized to an external clock. The device can also be enabled/disabled via a logic input pin (/EN).

The AP3409DNTR-G1 offers protection features including over-current protection (OCP), thermal shutdown protection (TSD), power-on reset (POR), and brown-out protection (BPP). Furthermore, the part offers a high power good circuit (PG), which alarms the system when the output voltage is out of regulation.

Overall, the AP3409DNTR-G1 is a highly integrated synchronous current-mode PWM step-down converter that provides precise output voltage regulation and accurate current limiting. It features a range of features and protection mechanisms which make it ideal for a broad range of applications, such as low-power digital and analog integrated circuits, lighting, LCD displays, and portable battery powered devices.

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