CAT661ESA ON Semiconductor, CAT661ESA Datasheet
CAT661ESA
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CAT661ESA Summary of contents
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CAT661 High Frequency 100mA CMOS Charge Pump, Inverter/Doubler FEATURES Converts 2V+ Low output resistance, 10 max. High power efficiency Selectable charge pump frequency of 25kHz or 135kHz; optimize capacitor size. Low quiescent current APPLICATIONS ...
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... An external oscillator can drive OSC and set the chip operating frequency. The charge-pump frequency is one-half the frequency at OSC Power supply. Positive voltage input. ORDERING INFORMATION Part Number CAT661EPA CAT661ESA CAT661ESA-TE13 CAT661EVA CAT661EVA-TE13 CAT661ERD8 CAT661EZD8 Doc. No. 5003, Rev. J DIP Package (P) BOOST/ ...
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ABSOLUTE MAXIMUM RATINGS V+ to GND ............................................................. 6V Input Voltage (Pins 1, 6 and 7) .. -0.3V to (V+ + 0.3V) BOOST/FC and OSC Input Voltage ........... The least negative of (Out - 0.3V) or (V+ - 6V) to (V+ ...
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Figure 1. Test Circuit Voltage Inverter 100µF TYPICAL OPERATING CHARACTERISTICS Typical characteristic curves are generated using the circuit in Figure 1. Inverter test conditions are GND, BOOST/FC = Open and T ...
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TYPICAL OPERATING CHARACTERISTICS Inverted Output voltage vs. Load Oscillator Frequency vs. Supply Voltage Supply Current vs. Oscillator Frequency No Load Output Voltage Drop vs. Load Current Oscillator Frequency vs. Supply Voltage Efficiency vs. Load Current 5 Doc. ...
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Figure 2. Test Circuit Voltage Doubler 100µ TYPICAL OPERATING CHARACTERISTICS Typical characteristic curves are generated using the circuit in Figure 2. Doubler test conditions are GND, BOOST/FC = Open ...
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APPLICATION INFORMATION Circuit Description and Operating Theory The CAT661 switches capacitors to invert or double an input voltage. Figure 3 shows a simple switch capacitor circuit. In position 1 capacitor C1 is charged to voltage V1. The total charge on ...
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OSCILLATOR FREQUENCY CONTROL The switching frequency can be raised, lowered or driven from an external source. Figure 6 shows a functional diagram of the oscillator circuit. The CAT661 oscillator has four control modes: BOOST/FC Pin Connection Open BOOST/FC= V+ Open ...
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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, ...
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CAPACITOR SUPPLIERS The following manufacturers supply low-ESR capacitors: Manufacturer Capacitor Type AVX/Kyocera TPS/TPS3 Vishay/Sprague 595 Sanyo MV-AX, UGX Nichicon F55 HC/HD Capacitor manufacturers continually introduce new series and offer different package styles recommended CONTROLLING LOSS IN CAT661 APPLICATIONS ...
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POSITIVE VOLTAGE DOUBLER The voltage doubler circuit shown in figure 9 gives VOUT = 2 x VIN for input voltages from 2.5V to 5.5V 2.5V to 5.5V *SCHOTTKY DIODE IS FOR START-UP ONLY PRECISION VOLTAGE DIVIDER A precision ...
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BATTERY VOLTAGE SPLITTER Positive and negative voltages that track each other can be obtained from a battery. Figure 11 shows how a 9V battery can provide symmetrical positive and negative voltages equal to one-half the battery voltage. BATTERY V BAT ...
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PARALLEL OPERATION Paralleling CAT661 devices will lower output resistance. As shown in figure 13, each device requires its own pump capacitor, C2, but the output reservoir capacitor is shared with all devices. The value of C2 should be increased by ...
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PACKAGE MECHANICAL DRAWINGS 8-LEAD 150 WIDE SOIC (S, X) 0.149 (3.80) 0.1574 (4.00) D 0.050 (1.27) BSC 0.013 (0.33) 0.020 (0.51) 8-LEAD 300 MIL WIDE PLASTIC DIP (P) D 0.100 (2.54) BSC 0.045 (1.14) 0.060 (1.52) 0.014 (0.36) 0.022 (0.56) ...
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TDFN (RD8, ZD8 4.00+0.10 (S) PIN 1 INDEX AREA 5 DAP SIZE 3.5 X 2.4 0.30+0.05 (8x) 2.40 REF. (2x) 0.75+0. 0.0-0. 0.10 MAX TYP. NOTE: 0.15 1. ALL DIMENSIONS ARE IN ...
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REVISION HISTORY Date Rev. 10/15/03 G 10/27/04 H 1/20/2005 I 04/22/2005 J Copyrights, Trademarks and Patents © Catalyst Semiconductor, Inc. Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: Beyond Memory ™, DPP ™, EZDim ™, LDD ...