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RT8805 参数 Datasheet PDF下载

RT8805图片预览
型号: RT8805
PDF下载: 下载PDF文件 查看货源
内容描述: 两相通用PWM控制器 [Two Phase General Purpose PWM Controller]
分类和应用: 控制器
文件页数/大小: 15 页 / 377 K
品牌: RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
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Preliminary
RT8805
Two Phase General Purpose PWM Controller
General Description
The RT8805 is the most compact dual-phase synchronous
buck controller in the industry specifically designed for
high power density applications. This part is capable of
delivering up to 60A output current due to its embedded
bootstrapped drivers that support 12V + 12V driving
capability.
The phase currents are sensed by innovative time sharing
R
DS(ON)
current sensing technique for current balance and
over current balance. Using one common GM amplifier to
sense two phase currents eliminates offset and
nonlinearity of the GM amplifier and yields good current
balance. Other features include adjustable operation
frequency from 50kHz to 1MHz, adjustable soft-start,
PGOOD, external compensation, enable/shutdown for
various application and performance consideration.
The RT8805 comes to a tiny footprint package of
VQFN-16L 3x3 package that is capable of dissipating up
to 1.47W heat.
Features
12V Power Supply Voltage
2 Phase Power Conversion
Embedded 12V Boot Strapped Driver
Precise Core Voltage Regulation
Low Side MOSFET R
DS(ON)
Current Sensing for
Power Stage Current Balance
External Compensation
Adjustable Soft-Start
Adjustable Frequency and Typical at 300kHz Per
Phase
Power Good Indication
Adjustable Over Current Protection
Small 16-Lead VQFN Package
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Middle-High End GPU Core Power
High End Desktop PC Memory Core Power
Low Output Voltage, High Power Density DC-DC
Converters
Voltage Regulator Modules
Ordering Information
RT8805
Package Type
QV : VQFN-16L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
Pin Configurations
(TOP VIEW)
PHASE1
LGATE1
LGATE2
12
PHASE2
11
UGATE2
10
BOOT2
9
5
6
7
8
Note :
RichTek Pb-free products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
100% matte tin (Sn) plating.
UGATE1
1
BOOT1
2
AGND
3
IMAX
4
16 15 14 13
GND
VCC
PGOOD
RT
SS
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
VQFN-16L 3x3
DS8805-01
November 2005
COMP
FB
www.richtek.com
1