參數(shù)資料
型號： CAT661EVA
英文描述： POT 200K OHM 3/8 SQ CERM SL MT
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?。?/td> 488K
代理商： CAT661EVA
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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
CAT661EVA-T3 功能描述:IC REG MULTI CONFIG 0.1A 8SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應(yīng)商設(shè)備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR
CAT661EVA-TE13 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Frequency 100mA CMOS Charge Pump, Inverter/Doubler
CAT661EZD8 制造商:CATALYST 制造商全稱:Catalyst Semiconductor 功能描述:High Frequency 100mA CMOS Charge Pump, Inverter/Doubler
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