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RT9259APS 参数 Datasheet PDF下载

RT9259APS图片预览
型号: RT9259APS
PDF下载: 下载PDF文件 查看货源
内容描述: 12V同步降压PWM DC -DC和线性电源控制器 [12V Synchronous Buck PWM DC-DC and Linear Power Controller]
分类和应用: 控制器
文件页数/大小: 14 页 / 244 K
品牌: RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
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RT9259A
12V Synchronous Buck PWM DC-DC and Linear Power
Controller
General Description
The RT9259A is a dual-channel DC/DC controller
specifically designed to deliver high quality power where
12V power source is available. This part consists of a
synchronous buck controller and an LDO controller. The
synchronous buck controller integrates 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. The LDO controller drives an external N-MOSFET
for lower power requirement.
Other features include adjustable operation frequency,
internal soft start, under voltage protection, over current
protection and shut down function. With the above
functions, this part provides customers a compact, high
efficiency, well-protected and cost-effective solution. This
part comes to SOP-14 package.
Features
Single 12V Bias Supply
Support Dual Channel Power Conversion
One Synchronous Rectified Buck PWM Controller
One Linear Controller
Both Controllers Drive Low Cost N-Channel
MOSFETs
Adjustable Frequency from 150kHz to 1MHz
and Free-Run Frequency at 230kHz
Small External Component Count
Output Voltage Regulation
PWM Controller :
±
1% Accuracy
LDO Controller :
±
2% Accuracy
Two Internal V
REF
Power Support Lower to 0.8V
Adjustable External Compensation
Linear Controller Drives N-Channel MOSFET Pass
Transistor
Fully-Adjustable Outputs
Under Voltage Protection for Both Outputs
Adjustable Over Current Protection
RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9259A
Package Type
S : SOP-14
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Applications
Graphic Card GPU, Memory Core Power
Graphic Card Interface Power
Motherboard, Desktop and Servers Chipset and Memory
Core Power
IA Equipments
Telecomm Equipments
High Power DC-DC Regulators
Note :
RichTek Pb-free and Green 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.
Pin Configurations
(TOP VIEW)
BOOT
RT_DIS
COMP
FB
DRV
FBL
GND
14
13
12
11
10
9
8
UGATE
PHASE
PGND
LGATE
OCSET
VREF
VCC12
2
3
4
5
6
7
SOP-14
DS9259A-02 March 2007
www.richtek.com
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