Diodes AP3583/A - Manual

Data Sheet
Single Phase Synchronous Buck PWM Controller With Reference Input AP3583/A
Dec. 2011 Rev. 1. 1 BCD Semiconductor Manufacturing Limited
1
General Description
The AP3583/A is a simple single-phase synchronous
buck controller. It operates from 5V or 12V supply
voltage and delivers high quality output voltage as
low as 0.6V. This device operates at fixed 200kHz
(AP3583) or 300kHz (AP3583A) frequency and
provides an optimum compromise between efficiency,
external component size and cost.
With integrated linear regulator bootstrap diode, and
N-Channel MOSFET gate drives, the AP3583/A can
reduce external component count and board space
requirements.
The AP3583/A supports both tracking mode and
stand-alone mode operation. The output voltage is
tightly regulated to the external reference voltage
from 0.4V to 3V at tracking mode or internal 0.6V
reference at stand-alone mode.
Other features include internal soft-start, under
voltage protection, over current protection and
shutdown function. With aforementioned functions,
this part provides customers a compact, high
efficiency, well-protected and cost-effective
solutions.
The AP3583/A is available in PSOP-8 package.
Features
• Supply Voltage: 5V/12V
• V
IN
Input Range: 3.0V to 13.2V
• 0.6V to 80% of V
IN
Output Range
• Internal Reference: 0.6V
• Support Tracking Mode and Stand-alone Mode
• Simple Single-loop Control
• Voltage-mode PWM Control
• Duty Cycle: 0% to 80%
• Fast Transient Response
• Fixed Oscillator Frequency: 200/300kHz
• Lossless, Programmable Over Current Protection
(Uses Lower MOSFET R
DS(ON)
)
• Start-up into Pre-biased Output
• Built-in Thermal Shutdown
• Built-in Soft-start
• Over Current/Voltage Protection
• Under Voltage Protection
• Integrated Boot Diode
Applications
• Power Supplies for Microprocessors/Peripherals
• PCs, Embedded Controllers, Memory Supplies
• DSP and Core Communications Processor
Supplies
• Subsystem Power Supplies
• PCI, AGP, Graphics Cards and Digital TV
• SSTL-2 and DDR/2/3 SDRAM Bus Termination
Supply
• Cable Modems, Set Top Boxes, and DSL
• Modems
• Industrial Power Supplies and General Purpose
Supplies
• 5V/12V Input DC-DC Regulators
• Low-voltage Distributed Power Supplies
Figure 1. Package Type of AP3583/A
PSOP-8