sp6645eu-tr Exar Corporation, sp6645eu-tr Datasheet
sp6645eu-tr
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sp6645eu-tr Summary of contents
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Single/Dual Alkaline Cell, High Efficiency Boost DC-DC Regulator 90mA Output Current at 1.3V Input 190mA Output Current at 2.6V Input +2V to +5.5V Output Range 0.88V Guaranteed Start-Up 92% High Efficiency 1.6µA Quiescent Supply Current at V Reverse Battery ...
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These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods ...
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1.3V 0mA GND, T BATT SHDN LOAD AMB ...
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Refer to the circuit in Figure 28 +25 C unless otherwise noted. AMB 100 0.1 1.0 10.0 100.0 Iload (mA) Figure 1. Efficiency vs. Output Current (Vout=3.3V), Rlim=2.5k, Li=22uH Sumida CD43 ...
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Refer to the circuit in Figure 28 +25 C unless otherwise noted. AMB 5.08 5.07 5.06 5.05 5.04 5.03 5.02 5.01 5. 100 Iload (mA) Figure 9. ...
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Refer to the circuit in Figure 28 + unless otherwise noted. AMB 100 0.1 1.0 10.0 100.0 Iload (mA) Figure 17. SP6644/6201 DC/DC LDO Combination Efficiency vs. Output Current ...
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Refer to the circuit in Figure 28 + unless otherwise noted. AMB Figure 25. Shutdown Response and Inductor Current, Vout=3.3V, Vbatt=1.3V, Rlim=2.5k, Rload=550 Ohms, Li=22uH Sumida CD43 ...
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DESCRIPTION The SP6644/6645 devices are high-efficiency, low-power step-up DC-DC converters ideal for single or dual alkaline cell applications such as pagers, remote controls, and other low-power portable end products. The SP6644/6645 devices feature a 5nA logic- controlled shutdown mode and ...
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V BATT FB +1.25V REFREADY V REF +1.0V (SP6644) +2.0V (SP6645) SP6644 SP6645 SHDN +1.0V (SP6644) +2.0V (SP6645) Figure 27. Internal Block Diagram of the SP6644/6645 Date: 11/30/04 SP6644/6645 High Efficiency Boost Regulator LOGIC DRV-P P DISCHARGE I-Discharge DRV-N Inductor ...
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Internal Bootstrap Circuitry The internal bootstrap circuitry contains a low-voltage start-up oscillator that pumps up the output voltage to approximately 1.9V so the main DC-DC converter can function. At lower battery supply voltages, the circuitry can start up with low-load ...
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Input 22µF 0.1µF SHDN Figure 28. Adjustable Output Voltage Circuitry With an external resistor tolerance of +1%, the peak current tolerance will be +6%. To make sure that the SP6644/6645 internal circuitry adequately controls the inductor current, ...
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LX pin, should be kept away from the voltage-feedback network and separated from it using grounded copper to minimize EMI. Capacitor equivalent series resistance is a major contributor to output ripple, usually greater than ...
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Input V BATT + C1 47µF GND BATT 2 BATTLO BATTLO 3 R LIM 4 SHDN SHDN R3 2.5k Probe access points for external connection by the user Figure 29. Schematic ...
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Pin #1 indentifier must be indicated within this shaded area (D/2 * E1/2) 8 Pin MSOP JEDEC MO-187 (AA) Variation SYMBOL MIN NOM 0.75 0.85 b 0.22 c ...
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... Part Number SP6644EU ............................................. -40 SP6644EU/TR ....................................... -40 SP6645EU ............................................. -40 SP6645EU/TR ....................................... -40 Available in lead free packaging. To order add "-L" suffix to part number. Example: SP6644EU/TR = standard; SP6644EU-L/TR = lead free /TR = Tape and Reel Pack quantity is 2500 for MSOP. Corporation ANALOG EXCELLENCE Sipex Corporation Headquarters and Sales Office 22 Linnell Circle ...