ICL7660 [HN]
电压翻转、倍增电路。输入1.5 ~ 10V电压，可以得到-1.5 ~ -10V的电压。转换效率: 98%。转换逻辑电源 +5V 为± 5V 双相电压；;
| 型号： | ICL7660 |
| 厂家： | 
NANJING HONANO ELECTRONIC CO., LTD. |
| 描述： | 电压翻转、倍增电路。输入1.5 ~ 10V电压，可以得到-1.5 ~ -10V的电压。转换效率: 98%。转换逻辑电源 +5V 为± 5V 双相电压； |
| 文件： | 总4页 (文件大小：101K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
COMS Voltage Converters
ICL7660
CMOS Voltage Converters
The ICL7660 are monolithic CMOS power supply circuits which offer unique performance advantages over
previously available devices. The ICL7660 performs supply voltage conversions from positive to negative for an input
range of +1.5V to +10.0V resulting in complementary output voltages of -1.5V to -10.0V.
Only 2 noncritical external capacitors are needed for the charge pump and charge reservoir functions.
The ICL7660 can also be connected to function as voltage doublers and will generate output voltages up to +18.6V with a
+10V input.
Contained on the chip are a series DC supply regulator, RC oscillator, voltage level translator, and four output power MOS
switches. A unique logic element senses the most negative voltage in the device and ensures that the output N-Channel
switch source-substrate junctions are not forward biased. This assures latchup free operation. The oscillator, when unloaded,
oscillates at a nominal frequency of 10kHz for an input supply voltage of 5.0V. This frequency can be lowered by the
addition of an external capacitor to the “OSC” terminal, or the oscillator may be overdriven by an external clock.
The “LV” terminal may be tied to GROUND to bypass the internal series regulator and improve low voltage (LV)
operation. At medium to high voltages (+3.5V to +10.0V), the LV pin is left floating to prevent device latchup.
Pinouts
Features
x Simple Conversion of +5V Logic Supply to 5V Supplies
x Simple Voltage Multiplication (VOUT = (-) nVIN)
x Typical Open Circuit Voltage Conversion Efficiency 99.9%
x Typical Power Efficiency 98%
SOP8 DIP 8
TOP VIEW
x Wide Operating Voltage Range
- ICL7660 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 10.0V
x Easy to Use - Requires Only 2 External Non-Critical Passive
Components
Applications
x On Board Negative Supply for Dynamic RAMs
x Localized ȝProcessor (8080 Type) Negative Supplies
x Inexpensive Negative Supplies
x Data Acquisition Systems
Pin Description
Name
NC
Pin#
Function
1
2
3
4
5
6
7
8
CAP+
GND
CAP-
VOUT
LV
“+” Capacitor Plate
Ground
“-” Capacitor Plate
Output Voltage
Low Supply Voltage
Oscillator
OSC
V+
Supply Voltage
Order Information
Part No.
Temp. Range (ć)
Package
SOP8
DIP8
ICL7660CSA
ICL7660CPA
0 to 70
0 to 70
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COMS Voltage Converters
ICL7660
Absolute Maximum Ratings
Supply Voltage
ICL7660
. . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10.5V
LV and OSC Input Voltage . . . . . . -0.3V to (V+ +0.3V) for V+ < 5.5V
(V+ -5.5V) to (V+ +0.3V) for V+ > 5.5V
Current into LV . . . . . . . . . . . . . . . . . . . . . . . . . . 20ȝA for V+ > 3.5V
Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Thermal Resistance, șJA (°C/W). . . . . . . . . . . . . . . . . . . . . . . . . . . .150
Maximum Storage Temperature Range. . . . . . . . . . . . -65°C to 150°C
Electrical Characteristics ( V+ = 5V, TA = 25°C, COSC = 0, unless otherwise specified)
PARAMETER
Supply Current
Supply Voltage Range - Lo
SYMBOL
I+
TEST CONDITIONS
RL=
MIN TA MAX, RL = 10kȍ,
LV to GND
MIN TA MAX, RL = 10kȍ,
LV to Open
MIN
-
1.5
TYP
170
-
MAX
500
3.5
UNITS
PA
VL+
V
Supply Voltage Range - Hi
VL+
3.0
-
10.0
V
IOUT = 20mA, TA = 25°C
IOUT = 20mA, 0°C TA 70°C
V+ = 2V, IOUT = 3mA,
LV to GND, 0°C TA 70°C
-
-
-
55
-
100
120
300
Output Source Resistans
ROUT
-
Oscillator Frequency
Power Efficiency
Voltage Conversion
Efficiency
fOSC
PEF
VOUT EF
-
95
97
10
98
99.9
-
-
-
kHz
%
%
RL = 5k
RL=
Oscillator Frequency
ZOSC
V+ = 2V
V+ = 5V
-
-
1.0
100
-
-
M
k
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COMS Voltage Converters
ICL7660
Functional Block Diagram
TYPICAL APPLICATION CIRCUITS
ICL7660
FIGURE 1. SIMPLE NEGATIVE CONVERTER
ICL7660
ICL7660
FIGURE 2. PARALLELING DEVICES
ICL7660
ICL7660
FIGURE 3. CASCADING DEVICES FOR INCREASED OUTPUT VOLTAGE
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COMS Voltage Converters
ICL7660
ICL7660
FIGURE 4. LOWERING OSCILLATOR FREQUENCY
ICL7660
FIGURE 5. COMBINED NEGATIVE VOLTAGE CONVERTER AND POSITIVE DOUBLER
ICL7660
FIGURE 6. POSITIVE VOLT DOUBLER
ICL7660
FIGURE 7. SPLITTING A SUPPLY IN HALF
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