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AP3586BM-G1

Description
Single Phase Synchronous Buck PWM Controller
File Size567KB,17 Pages
ManufacturerBCD Semi(Diodes)
Download Datasheet View All

AP3586BM-G1 Overview

Single Phase Synchronous Buck PWM Controller

Data sheet
Single Phase Synchronous Buck PWM Controller
General Description
The AP3586A/B/C is a compact synchronous
-rectified buck controller specifically designed to
operate from 5V or 12V supply voltage and deliver
high-quality output voltage as low as 0.6V
(AP3586A) or 0.8V (AP3586B/C). This device
operates at fixed 300kHz (AP3586A/B) or 200kHz
(AP3586C) frequency and provides an optimal level
of integration to reduce size and cost of the power
supply.
This controller integrates internal MOSFET drivers
that support 12V+12V bootstrapped voltage for high-
efficiency power conversion. The bootstrap diode is
built-in to simplify the circuit design and minimize
external part count.
This controller provides single feedback loop,
voltage-mode control with fast transient response.
The error amplifier features a 10MHz gain-bandwidth
product and 6V/µs slew rate which enables high
converter bandwidth for fast transient performance.
Other features include internal soft-start, under
voltage protection, over current protection and
shutdown function. With afore-mentioned functions,
this part provides customers a compact, high
efficiency,
well-protected
and
cost-effective
solutions.
The AP3586A/B/C is available in SOIC-8 and
PSOP-8 packages.
AP3586A/B/C
Features
Supply Voltage: 5V/12V
V
IN
Input Range: 3.3V to 12V
0.6V/0.8V to 82% of V
IN
Output Range
Internal Reference: 0.6V/0.8V
Simple Single-loop Control
Voltage-mode PWM Control
Duty Cycle: 0% to 82%
Fast Transient Response
10MHz High-bandwidth Error Amplifier with
6V/µs Slew Rate
Fixed Oscillator Frequency: 300kHz/200kHz
Lossless, Programmable Over Current Protection
(Uses Lower MOSFET R
DS(ON)
)
Start-up into Pre-biased Load
Built-in Thermal Shutdown
Built-in Soft-start
Over Current Protection
Over Voltage Protection
Under Voltage Protection
Integrated Boot Diode
Applications
Subsystem Power Supplies
PCI, AGP, Graphics Cards, 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
SOIC-8/PSOP-8
Figure 1. Package Types of AP3586A/B/C
Mar. 2012
Rev. 1. 1
1
BCD Semiconductor Manufacturing Limited
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