AP3502E Datasheet, PDF (1/11 Pages) BCD Semiconductor Manufacturing Limited – 340kHz, 2A Synchronous DC-DC Buck Converter Output Current: 2A

Preliminary Datasheet
340kHz, 2A Synchronous DC-DC Buck Converter
AP3502E
General Description
The AP3502E is a 340kHz fixed frequency, current
mode, PWM synchronous buck (step-down) DC-DC
converter, capable of driving a 2A load with high
efficiency, excellent line and load regulation. The
AP3502E exhibits high efficiency at light load. 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 AP3502E employs complete protection to ensure
system security. Including output Over Voltage
Protection, input Under Voltage Lock Out,
programmable Soft Start, Over Temperature
Protection and hiccup mode Short Circuit Protection.
This IC is available in SOIC-8 package.
Features
• Input Voltage Range: 4.5V to 18V
• Fixed 340kHz Frequency
• High Efficiency at Light Load
• High Efficiency: up to 95%
• Output Current: 2A
• 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
• Hiccup Mode SCP
Applications
• LCD TV
• Set Top Box
• Portable DVD
• Digital Photo Frame
May. 2012 Rev. 1. 3
SOIC-8
Figure 1. Package Type of AP3502E
BCD Semiconductor Manufacturing Limited
1