MAX683 MAXIM [Maxim Integrated Products], MAX683 Datasheet
MAX683
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MAX683 Summary of contents
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... High switching frequencies (externally adjustable up to 2MHz) and a unique regulation scheme allow the use of capacitors as small as 1µF per 100mA of output current. The MAX683/MAX684 are offered in a space- saving 8-pin µMAX package that is only 1.1mm high, while the MAX682 is available in an 8-pin SO. ...
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... T < +85° 22µA SHDN -40°C < T 0°C < T < +85° =4.4µA SHDN -40°C < T SHDN = 5.5V OUT R = 5V/I L MAX = +70° 250mA for MAX682 100mA for MAX683, MAX = +25°C.) (Note 1) A MIN TYP MAX 2.7 5.5 2.0 2.35 2.6 100 4.80 5.05 5.20 250 100 50 0.1 0.18 7.5 2.5 1.7 -3 0.35 ...
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... LOAD CURRENT (mA) OSCILLATOR FREQUENCY vs. SHUTDOWN PIN INPUT CURRENT 10M 1M 100k 10k 0 SHDN INPUT CURRENT ( A) Charge Pumps = 250mA for MAX682 100mA for MAX683, MAX = +25°C.) (Note 1) A MIN TYP MAX 0.8 2 0.69V (kHz) IN OSC OUTPUT VOLTAGE vs. LOAD CURRENT (SKIP = HIGH) 5 ...
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... A MAX683 EFFICIENCY vs. LOAD CURRENT (SKIP = LOW) 100 100 1000 LOAD CURRENT (mA) MAX683 EFFICIENCY vs. LOAD CURRENT (SKIP = HIGH) 100 SHDN 100 1000 LOAD CURRENT (mA) ...
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Regulated 5V-Output (Circuit of Figure 3.3V, component values from Tables 2 and SHUTDOWN TIMING MAX682 TOC18 100 s/div A: OUTPUT VOLTAGE: SKIP = HIGH 2V/div L ...
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... The devices also contain a shutdown feature. The MAX682/MAX683/MAX684 consist of an error amplifier, a 1.23V bandgap reference, an internal resis- tive feedback network, an oscillator, high-current MOS- FET switches, and shutdown and control logic (Figure 1) ...
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... Table 1 summarizes the tradeoffs between the two operating modes. Frequency Selection and Shutdown The SHDN pin on the MAX682/MAX683/MAX684 per- forms a dual function: it shuts down the device and determines the oscillator frequency. The SHDN input looks like a diode to ground and should be driven through a resistor ...
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... F 0.47 80 Figure 6. Paralleling Two MAX682s where ESR COUT tance, and R ance of the IC. R PHONE 1.6Ω for the MAX683, and 3Ω for the MAX684. In con- NUMBER stant-frequency mode, output ripple is dominated by C and is approximately: OUT (603) 224-1961 V RIPPLE(const-freq) All capacitors must maintain a low (<100mΩ) equiva- lent series resistance (ESR) ...
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... CXP and CXN), bypass SHDN to GND with a small capacitor (0.01µF). _______________________________________________________________________________________ The MAX682/MAX683/MAX684 can be paralleled to yield higher load currents. The circuit of Figure 6 can deliver 500mA at 5V. It uses two MAX682s in parallel. The devices can share the output capacitors, but each ...
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Regulated 5V-Output Charge Pumps 10 ______________________________________________________________________________________ Package Information ...
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Regulated 5V-Output ______________________________________________________________________________________ Charge Pumps NOTES 11 ...
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Regulated 5V-Output Charge Pumps 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 the right to change the circuitry and specifications ...