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AP3503 Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AP3503 Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 11 page  Data Sheet 340kHz, 3A Synchronous DC-DC Buck Converter AP3503 May. 2012 Rev. 1. 7 BCD Semiconductor Manufacturing Limited 1 General Description The AP3503 is a 340kHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 3A load with high efficiency, excellent line and load regulation. The device integrates N-channel power MOSFET switches with low on-resistance. Current mode control provides fast transient response and cycle-by-cycle current limit. The AP3503 employs complete protection to ensure system security. Including output Over Voltage Protection, input Under Voltage LockOut, programmable soft-start, Over Temperature Protection to safeguard the circuit. This IC is available in PSOP-8 package. Features • Input Voltage Range: 4.5V to 18V • Fixed 340kHz Frequency • High Efficiency: up to 95% • Output Current: 3A • Current Mode Control • Built-in Over Current Protection • Built-in Thermal Shutdown Function • Built-in UVLO Function • Built-in Over Voltage Protection • Programmable Soft-start Applications • LCD TV • Set Top Box • Portable DVD • Digital Photo Frame Figure 1. Package Type of AP3503 PSOP-8 |
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