参数资料
| 型号： | CAT660EVA-GT3 |
| 厂商： | ON Semiconductor |
| 文件页数： | 7/13页 |
| 文件大小： | 0K |
| 描述： | IC REG SWITCHED CAP DBL INV 8SOI |
| 标准包装： | 3,000 |
| 类型： | 切换式电容器（充电泵），倍增器，反相 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输入电压： | 1.5 V ~ 5.5 V |
| 频率 - 开关： | 10kHz，80kHz |
| 电流 - 输出： | 100mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | * |
| 封装/外壳： | * |
| 包装： | * |
| 供应商设备封装： | * |
CAT660
Oscillator Frequency Control
The switching frequency can be raised, lowered or driven
from an external source. Figure 16 shows a functional
diagram of the oscillator circuit.
The CAT660 oscillator has four control modes:
Table 4.
By connecting the BOOST/FC pin to V+, the charge and
discharge currents are increased, and the frequency is
increased by approximately 8 times. Increasing the
frequency will decrease the output impedance and ripple
currents. This can be an advantage at high load currents.
Increasing the frequency raises quiescent current but allows
smaller capacitance values for C1 and C2.
BOOST/FC
Pin Connection
Open
OSC Pin
Connection
Open
Nominal
Oscillator
Frequency
10 kHz
If pin 7, OSC, is loaded with an external capacitor the
frequency is lowered. By using the BOOST/FC pin and an
external capacitor at OSC, the operating frequency can be
set.
BOOST/FC = V+ Open 80 kHz
Open or External Capacitor ?
BOOST/FC = V+
Open External Clock Frequency of
external clock
If BOOST/FC and OSC are left floating (Open), the
nominal oscillator frequency is 10 kHz. The pump
frequency is one ? half the oscillator frequency.
V +
(8)
Note that the frequency appearing at CAP+ or CAP ? is
one ? half that of the oscillator.
Driving the CAT660 from an external frequency source
can be easily achieved by driving Pin 7 and leaving the
BOOST pin open, as shown in Figure 16. The output current
from Pin 7 is small, typically 1 m A to 8 m A, so a CMOS can
drive the OSC pin. For 5 V applications, a TTL logic gate can
be used if an external 100 k Ω pull ? up resistor is used as
shown in Figure 17.
BOOST/FC
SW1
CAP +
(2)
SW2
8x
(1)
OSC
(7)
OSC
B 2
f
f
+
CAP ?
(4)
C1
VOUT
(5)
C2
+
LV
(6)
CLOSED WHEN
V + > 3.0 V
GND
(3)
(N) = Pin Number
Figure 15. CAT660 Block Diagram
http://onsemi.com
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CAT660EVA-T3 | 功能描述:电荷泵 Charge pump voltage converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| CAT660EVA-TE13 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:100mA CMOS Charge Pump Inverter/Doubler |
| CAT660EZD8 | 功能描述:电荷泵 Ind Temp 100mA Out RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| CAT660EZD8-T2 | 制造商:ON Semiconductor 功能描述:CHARGE PUMP VOLTAGE CONVERTER - Tape and Reel |
| CAT661 | 制造商:CATALYST 制造商全称:Catalyst Semiconductor 功能描述:High Frequency 100mA CMOS Charge Pump, Inverter/Doubler |
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