MAX681 MAXIM [Maxim Integrated Products], MAX681 Datasheet
MAX681
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MAX681 Summary of contents
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... Both parts have an on-chip, 8kHz oscillator. The MAX681 has the capacitors internal to the package, and the MAX680 requires four external capacitors to produce both positive and negative voltages from a single supply. The output source impedances are typically 150Ω ...
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Voltage Converters ABSOLUTE MAXIMUM RATINGS V ................................................................................... +6. ...................................................................................... +12V V- ..........................................................................................-12V V- Short-Circuit Duration ...........................................Continuous V+ Current ..........................................................................75mA ∆V/∆T ..........................................................................1V/µ Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage ...
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... OUTPUT RESISTANCE vs. SUPPLY VOLTAGE 250 C1- 200 R + OUT 150 100 R - OUT 50 0 2.0 3.0 4.0 5.0 V (V) OUTPUT VOLTAGE vs. OUTPUT CURRENT (FROM V+ TO V-) 10 MAX680, MAX681 C1– OUTPUT CURRENT (mA) _______________________________________________________________________________________ +5V to ±10V Voltage Converters OUTPUT VOLTAGE vs ...
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... The MAX680 needs only four capacitors. These may be inexpensive electrolytic capacitors with values in the 1µF to 100µF range. The MAX681 contains two 1.5µF capacitors as C1 and C2, and two 2.2µF capacitors as C3 and C4. See Typical Operating Characteristics. Figure 2a shows the idealized operation of the positive voltage converter ...
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... For applications where PC board space premium, the MAX681, with its capacitors internal to the package, offers the smallest footprint. The simple circuit shown in Figure 3 performs the same ...
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... V- GND Figure 4. Paralleling MAX680s For Lower Source Resistance The MAX680/MAX681 are not voltage regulators: the output source resistance of either charge pump is approximately 150Ω at room temperature with V 5V. Under light load with an input V approach +10V and V- will be at -10V. However both, ...
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... MAX663, and MAX664 is less than 500µA, while the out- put current capability is 5mA. The MAX680/MAX681 input can vary from without affecting regulation appreciably. With higher input voltage, more current can be drawn from the MAX680/MAX681 outputs. With 10mA can be drawn from both regulated outputs CC simultaneously. Assuming 150Ω ...
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Voltage Converters ________________________________________________________Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves ...