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參數(shù)資料
| 型號： | AT1367CN |
| 廠商： | Aimtron Technology Corp. |
| 英文描述： | 1MHz, 800mA Synchronous Buck Converter With Power Good Detector & LDO |
| 中文描述： | 1MHz的，800mA的同步降壓轉(zhuǎn)換器與電源良好探測器 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大小： | 659K |
| 代理商： | AT1367CN |
AT1367A/B/C/D
Preliminary Product Information
1MHz, 800mA Synchronous Buck Converter
With Power Good Detector & LDO
Typical Application Circuits ( Continued )
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879 WWW:
http://www.aimtron.com.tw
3/2/2006
REV:1.2
Email:
service@aimtron.com.tw
8
SW
/PG
VCC
PGND
PG
DELAY
OUT2
OUT1
VIN
5.0V
VOUT1
3.3V/300mA
VOUT2
1.8V/400mA
10uF
4.7uH
10uF
100K
AT1367B
27nF
2.2uF
VBG
10nF
AGND
To DSP
To DSP
From /PG
100K
100K
1M
0.1uF
Figure 5
Application Information
Capacitor Selection
In continuous mode, the source current of the top MOSFET is square wave of duty
cycle. The Primary function of the input capacitor is to provide a low impedance loop
for the edges of pulsed current drawn by the AT1367A/B/C/D. A load step at the
output can induce ringing at the input VIN. This ringing can couple to the output and
be mistaken as loop instability. The oscillation can be improved by add the
capacitance of the input capacitor. A typical value is 10
μ
F ceramic (X5R or X7R),
POSCAP or Aluminum Polymer. These capacitors will provide good high frequency
bypassing and their low ESR will reduce resistive losses for higher efficiency. The
input capacitor RMS current varies with the input voltage and the output voltage. The
equation for the maximum RMS current in the input capacitor is:
)
1
IN
O
IN
O
OMAX
RMS
V
V
V
V
I
I
=
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| AT1367D | 1MHz, 800mA Synchronous Buck Converter With Power Good Detector & LDO |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT1367D | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:1MHz, 800mA Synchronous Buck Converter With Power Good Detector & LDO |
| AT1367DN | 制造商:AIMTRON 制造商全稱:AIMTRON 功能描述:1MHz, 800mA Synchronous Buck Converter With Power Good Detector & LDO |
| AT1368 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1- Channel Synchronous Buck PWM Controller with Power Good Reset |
| AT1368A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1- Channel Synchronous Buck PWM Controller with Power Good Reset |
| AT1368AR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:1- Channel Synchronous Buck PWM Controller with Power Good Reset |
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