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參數(shù)資料
| 型號(hào)： | RT9201 |
| 廠商： | Richtek Technology Corporation |
| 元件分類： | DC/DC變換器 |
| 英文描述： | High Efficiency PWM Step-Down DC-DC Converter |
| 中文描述： | 高效PWM降壓型DC - DC轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 1/13頁(yè) |
| 文件大?。?/td> | 206K |
| 代理商： | RT9201 |
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RT9201
1
DS9201-12 August 2007
www.richtek.com
Pin Configurations
High Efficiency PWM Step-Down DC-DC Converter
Ordering Information
RT9201
Features
l
+2.5V to +5.5V Input Range
l
Adjustable Output From 0.85V to V
IN
l
600mA Output Current
l
95% Efficiency
l
No Schottky Diode Required
l
85
m
A Quiescent Current
l
100% Duty Cycle in Low-Dropout Mode
l
800kHz Fixed-Frequency PWM Operation
l
Pulse-skipping Mode Operation During Light Ioad
l
RoHS Compliant and 100% Lead (Pb)-Free
Applications
l
Cellular Telephones
l
Wireless Modems
l
Personal Information Appliances
l
Portable Instruments
l
Distributed Power Systems
l
Battery-Powered Equipment
(1 Li-Ion or 3 NiMH/NiCd)
(TOP VIEW)
VDFN-10L 3x3
General Description
The RT9201 is a high-efficiency pulse-width-modulated
(PWM) step-down DC-DC converter. Capable of delivering
600mA output current over a wide input voltage range
from 2.5 to 5.5V, the RT9201 is ideally suited for portable
electronic devices that are powered from 1-cell Li-ion
battery or from other power sources within the range such
as cellular phones, PDAs and handy-terminals.
Four operational modes are available: PWM, PSM, Low-
Dropout and shut-down modes. Internal synchronous
rectifier with low R
DS(ON)
dramatically reduces conduction
loss at PWM mode. No external Schottky diode is
required in practical application. The RT9201 auto-
matically turns off the synchronous rectifier while the
inductor current is low and enters discontinuous PWM
mode. This can increase efficiency at light load condition.
The RT9201 enters PSM (pulse-skipping mode) at
extremely light load condition. The equivalent switching
frequency is reduced to increase the efficiency in PSM.
The RT9201 enters Low-Dropout mode when normal
PWM cannot provide regulated output voltage by
continuously turning on the upper P-MOSFET. RT9201
enters shut-down mode and consumes less than 0.1
μ
A
when EN pin is pulled low.
The switching ripple is easily smoothed-out by small
package filtering elements due to a fixed operation
frequency of 800kHz. This along with small VDFN package
provides small PCB area application. Other features
include soft start, 0.8V internal reference voltage with
1% accuracy, over temperature protection, and over
current protection.
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.
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.
Package Type
QV : VDFN-10L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
NC
VDD
PVDD
LX
PGND
EN
SS
FB
NC
GND
9
8
7
9
1
2
3
4
5
10
GND
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RT9201GQV | High Efficiency PWM Step-Down DC-DC Converter |
| RT9201PQV | High Efficiency PWM Step-Down DC-DC Converter |
| RT9202B | Single Synchronous Buck PWM DC-DC Controller |
| RT9202BGS | Single Synchronous Buck PWM DC-DC Controller |
| RT9202BPS | Single Synchronous Buck PWM DC-DC Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RT9201GQV | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:High Efficiency PWM Step-Down DC-DC Converter |
| RT9201PQV | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:High Efficiency PWM Step-Down DC-DC Converter |
| RT9202 | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Single Synchronous Buck PWM DC-DC Controller |
| RT9202_07 | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Single Synchronous Buck PWM DC-DC Controller |
| RT9202B | 制造商:RICHTEK 制造商全稱:Richtek Technology Corporation 功能描述:Single Synchronous Buck PWM DC-DC Controller |
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