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參數(shù)資料
| 型號(hào)： | CAT661EZD8 |
| 英文描述： | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| 中文描述： | 高頻100mA的CMOS電荷泵，逆變器/倍增 |
| 文件頁(yè)數(shù)： | 10/16頁(yè) |
| 文件大小： | 488K |
| 代理商： | CAT661EZD8 |
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CAT661
10
Doc. No. 5003, Rev. J
CAPACITOR SUPPLIERS
The following manufacturers supply low-ESR capacitors:
Manufacturer
Capacitor Type
Phone
WEB
Email
Comments
AVX/Kyocera
TPS/TPS3
843-448-9411
www.avxcorp.com
avx@avxcorp.com
Tantalum
Vishay/Sprague 595
402-563-6866
www.vishay.com
—
Aluminum
Sanyo
MV-AX, UGX
619-661-6835
www.sanyo.com
Svcsales@sanyo.com Aluminum
Nichicon
F55
847-843-7500
www.nichicon-us.com
—
Tantalum
HC/HD
Aluminum
The effective output impedance of a CAT661 circuit is
approximately:
Rcircuit
≈
Rout 661 + (4 x ESRC1) + ESRC2
VOLTAGE INVERSION POSITIVE-TO-NEGATIVE
The CAT661 easily provides a negative supply voltage
from a positive supply in the system. Figure 8 shows a
typical circuit. The LV pin may be left floating for positive
input voltages at or above 3.3V.
Figure 8: Voltage Inverter
CONTROLLING LOSS IN CAT661 APPLICATIONS
There are three primary sources of voltage loss:
1.
Output resistance
VLOSS = ILOAD x ROUT, where ROUT is the
CAT661 output resistance and ILOAD is the
load current.
Charge pump (C1) capacitor ESR:
VLOSSC1 4 x ESRC1 x ILOAD, where
ESRC1 is the ESR of capacitor C1.
Output or reservoir (C2) capacitor ESR:
VLOSSC2 = ESRC2 x ILOAD, where ESRC2
is the ESR of capacitor C2.
2.
3.
Increasing the value of C2 and/or decreasing its ESR will
reduce noise and ripple.
+
VOUT = -VIN
C2
1
2
3
4
8
7
6
5
CAT661
NC
+
C1
VIN
1.5V to 5.5V
BOOST/FC
CAP+
GND
CAP-
V+
OSC
LV
OUT
Capacitor manufacturers continually introduce new series
and offer different package styles. It is recommended
that before a design is finalized capacitor manufacturers
should be surveyed for their latest product offerings.
TYPICAL APPLICATIONS
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CAT661 | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661EPA | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661ERD8 | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661ESA | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661ESA-TE13 | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT661EZD8-T2 | 制造商:ON Semiconductor 功能描述:CHARGE PUMP VOLTAGE CONVERTER - Tape and Reel |
| CAT6-7851A-600MHZ | 制造商:Belden Inc 功能描述: |
| CAT6-7881A-250MHZ | 制造商:Belden Inc 功能描述: |
| CAT-690459-1-S | 制造商:Samtec Inc 功能描述:CAT - Bulk |
| CAT-690463-1 | 制造商:Samtec Inc 功能描述:CAT - Bulk |
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