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RT9202B 参数 Datasheet PDF下载

RT9202B图片预览
型号: RT9202B
PDF下载: 下载PDF文件 查看货源
内容描述: 单同步降压PWM DC- DC控制器 [Single Synchronous Buck PWM DC-DC Controller]
分类和应用: 控制器
文件页数/大小: 14 页 / 197 K
品牌: RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
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RT9202B
Single Synchronous Buck PWM DC-DC Controller
General Description
The RT9202B is a single power supply PWM DC-DC
converter controller designed to drive N-MOSFET in a
synchronous buck topology. The IC integrates the control,
output adjustment, monitoring and protection functions in
a small 8-pin package.
The RT9202B uses a low gain voltage mode PWM control
for simple application design. An internal 0.8V reference
allows the output voltage to be precisely regulated to
low voltage requirement. A fixed 300kHz oscillator
reduces the component size for saving board space.
The RT9202B features over current protection, over voltage
protection, and under voltage lock-out. The output current
is monitored by sensing the voltage drop across the
MOSFET's R
DS(ON)
, which eliminates the need for a current
sensing resistor.
Features
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Operate From 5V
0.8V Internal Reference
Drive Two N-MOSFETs
Voltage Mode PWM Control
Fast Transient Response
Fixed 300kHz Oscillator Frequency
Full 0 to 100% Duty Cycle
Internal Soft Start
Adaptive Non-Overlapping Gate Driver
Over-Current Monitor Uses MOSFET R
DS(ON)
Over-Voltage Protection Uses Low-Side MOSFET
RoHS Compliant and 100% Lead (Pb)-Free
Applications
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Ordering Information
RT9202B
Package Type
S : SOP-8
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
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.
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Motherboard Power Regulation for Computers
Subsystems Power Supplies
Cable Modems, Set Top Box, and DSL Modems
DSP and Core Communications processor Supplies
Memory Power Supplies
Personal Computer Peripherals
Industrial Power Supplies
5V-Input DC-DC Regulators
Low Voltage Distributed Power Supplies
Pin Configurations
(TOP VIEW)
BOOT
UGATE
GND
LGATE
2
3
4
8
7
6
5
PHASE
OCSET
FB
VCC
SOP-8
DS9202B-03 March 2007
www.richtek.com
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