- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄366752 > CAT661ERD8 High Frequency 100mA CMOS Charge Pump, Inverter/Doubler PDF資料下載
參數(shù)資料
| 型號： | CAT661ERD8 |
| 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 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大小： | 488K |
| 代理商： | CAT661ERD8 |
CAT661
9
Doc. No. 5003, Rev. J
VRIPPLE (mV)
IOUT (mA)
FOSC (kHz)
C2 (
μ
F)
C2 ESR (
)
45
100
25
150
0.2
25
100
135
150
0.2
CAPACITOR SELECTION
Low ESR capacitors are necessary to minimize voltage
losses, especially at high load currents. The exact
values of C1 and C2 are not critical but low ESR
capacitors are necessary.
The ESR of capacitor C1, the pump capacitor, can have
a pronounced effect on the output. C1 currents are
approximately twice the output current and losses occur
on both the charge and discharge cycle. The ESR
effects are thus multiplied by four. A 0.5
ESR for C1 will
have the same effect as a 2
increase in CAT661 output
impedance.
Output voltage ripple is determined by the value of C2
and the load current. C2 is charged and discharged at a
current roughly equal to the load current. The internal
switching frequency is one-half the oscillator frequency.
VRIPPLE = IOUT/(FOSC x C2) + IOUT x ESRC2
For example, with a 25kHz oscillator frequency (12.5kHz
switching frequency), a 150
μ
F C2 capacitor with an ESR
of 0.2
and a 100mA load peak-to-peak the ripple
voltage is 45mV.
VRIPPLE vs. FOSC
Figure 6. Oscillator
Figure 7. External Clocking
BOOST/FC
(1)
LV
(6)
OSC
(7)
~18pF
I
7.0 I
7.0 I
I
V+
+
-V+
C2
1
2
3
4
8
7
6
5
REQUIRED FOR TTL LOGIC
CAT661
V+
100k
OSC INPUT
NC
+
C1
BOOST/FC
CAP+
GND
CAP-
V+
OSC
LV
OUT
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CAT661ESA | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661ESA-TE13 | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661EVA | POT 200K OHM 3/8 SQ CERM SL MT |
| CAT661EVA-TE13 | High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT71C256LKI-85 | 72-Mbit DDR-II SRAM 2-Word Burst Architecture |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CAT661ESA | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661ESA-TE13 | 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
| CAT661EVA | 制造商:ON Semiconductor 功能描述: 制造商:ON Semiconductor 功能描述:CHARGE PUMP VOLTAGE CONVERTER - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: 制造商:Catalyst Semiconductor 功能描述: |
| CAT661EVA-G | 制造商:ON Semiconductor 功能描述:CAT661: Charge Pump Voltage Converter SOIC8 |
| CAT661EVA-GT3 | 功能描述:電荷泵 CHG PUMP VOLT CONVERTER RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。