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參數(shù)資料
| 型號： | LX1677-CPWT |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.5 A SWITCHING CONTROLLER, 1100 kHz SWITCHING FREQ-MAX, PDSO38 |
| 封裝： | PLASTIC, TSSOP-38 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 353K |
| 代理商： | LX1677-CPWT |
LX1677
PRELIMINARY DATA SHEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 14
WWW
.Microse
m
i
.CO
M
AMD64 Processor VRM Controller
I N T E GR A T ED
PRODUCT S
Copyright
2000
Rev 0.4a, 2003-03-03
APPLICATION NOTE (CONTINU E D)
SOFT-START CAPACITOR
An external soft-start capacitor is connected to the
DACOUT pin and will be charged, or discharged, at a
linear rate by the internal 50uA bi-directional current source
after the UVLO circuit has been satisfied. Whenever the
VID code is changed during normal operation the soft-start
capacitor will determine the rate of change at the output.
PROGRAMMING THE OUTPUT VOLTAGE
Output voltage is determined by the internal 5 bit DAC.
The DAC inputs are the Voltage Identification (VID) 0-4
lines, the VID table lists the available output voltages for
the corresponding VID codes.
There are no external resistor dividers to program output
voltage and only the steps listed are available.
AA
PP
LL
IICC
AA
TT
IIOO
NN
SS
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