ICL7660A INTERSIL [Intersil Corporation], ICL7660A Datasheet
ICL7660A
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ICL7660A Summary of contents
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... Typical Open Circuit Voltage Conversion Efficiency 99.9% • Typical Power Efficiency 98% • Wide Operating Voltage Range - ICL7660 . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 10.0V - ICL7660A . . . . . . . . . . . . . . . . . . . . . . . . . 1.5V to 12.0V • ICL7660A 100% Tested at 3V • Easy to Use - Requires Only 2 External Non-Critical Passive Components • No External Diode Over Full Temp. and Voltage Range Applications • ...
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... C Absolute Maximum Ratings Supply Voltage ICL7660 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +10.5V ICL7660A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +13.0V LV and OSC Input Voltage . . . . . . -0.3V to (V+ +0.3V) for V+ < 5.5V (Note (V+ -5.5V) to (V+ +0.3V) for V+ > 5.5V Current into LV (Note for V+ > 3.5V Output Short Duration (V 5.5V .Continuous SUPPLY Operating Conditions Temperature Range ICL7660M -55 ICL7660C, ICL7660AC ICL7660AI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specifi ...
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... In the test circuit, there is no external capacitor applied to pin 7. However, when the device is plugged into a test socket, there is usually a very small but finite stray capacitance present, of the order of 5pF. 5. The Intersil ICL7660A can operate without an external diode over the full temperature and voltage range. This device will function in existing designs which incorporate an external diode with no degradation in overall circuit performance. ...
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... + SLOPE LOAD CURRENT I FIGURE 7. OUTPUT VOLTAGE AS A FUNCTION OF OUTPUT CURRENT 3-29 ICL7660, ICL7660A (Test Circuit of Figure 11) (Continued) 100 + 100 125 o C) FIGURE 4. POWER CONVERSION EFFICIENCY ...
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... FIGURE 9. OUTPUT VOLTAGE AS A FUNCTION OF OUTPUT CURRENT NOTE: 6. These curves include in the supply current that current fed directly into the load R supply current goes directly to the positive side of the load, and the other half, through the ICL7660/ICL7660A, to the negative side of the load. Ideally ...
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... When using polarized capacitors, the + terminal of C must be connected to pin 2 of the ICL7660 and ICL7660A and the + terminal the voltage supply driving the ICL7660 and ICL7660A has a large source impedance ( then a 2.2 F capacitor from pin 8 to ground may be required to limit rate of rise of input voltage to less than 2V/ s ...
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... Typical Applications Simple Negative Voltage Converter The majority of applications will undoubtedly utilize the ICL7660 and ICL7660A for generation of negative supply voltages. Figure 13 shows typical connections to provide a negative supply negative (GND) for supply voltages below 3.5V. The output characteristics of the circuit in Figure 13A can be approximated by an ideal voltage source in series with a resistance as shown in Figure 13B ...
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... I C2 OUT It is also possible to increase the conversion efficiency of the ICL7660 and ICL7660A at low load levels by lowering the oscillator frequency. This reduces the switching losses, and is shown in Figure 18. However, lowering the oscillator frequency will cause an undesirable increase in the impedance of the pump (C this is overcome by increasing the values of C same factor that the frequency has been reduced ...
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... Regulated Negative Voltage Supply In some cases, the output impedance of the ICL7660 and ICL7660A can be a problem, particularly if the load current varies substantially. The circuit of Figure 22 can be used to overcome this by controlling the input voltage, via an ICL7611 low-power CMOS op amp, in such a way as to maintain a nearly constant output voltage ...
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... Other Applications Further information on the operation and use of the ICL7660 and ICL7660A may be found in AN051 “Principals and Applications of the ICL7660 and ICL7660A CMOS Voltage Converter”. +5V LOGIC SUPPLY TTL DATA INPUT 1 2 ICL7660 + ICL7660A All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. ...