SP6644EU SIPEX [Sipex Corporation], SP6644EU Datasheet
SP6644EU
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SP6644EU Summary of contents
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Single/Dual Alkaline Cell, High Efficiency 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 Protection Internal Synchronous ...
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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 Rev:B Date 4/13/04 LOGIC DRV-P P DISCHARGE DRV-N Inductor Damping Switch START UP N ...
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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 Dimensions in (mm) JEDEC MO-187 (AA) Variation MIN NOM MAX - - 0.75 0.85 ...
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... Model SP6644EU ............................................. -40 SP6645EU ............................................. -40 Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sales Office 233 South Hillview Drive ...