SP6641AEK-5-0/TR Exar Corporation, SP6641AEK-5-0/TR Datasheet
SP6641AEK-5-0/TR
Specifications of SP6641AEK-5-0/TR
Related parts for SP6641AEK-5-0/TR
SP6641AEK-5-0/TR Summary of contents
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Alkaline DC/DC Boost Regulator in SOT-23 Ultra Low Quiescent Current: 10µA Wide Input Voltage Range: 0.9V to 4.5V 90mA I at 1.3V Input (SP6641A-3.3V) OUT 500mA I at 2.6V Input (SP6641B-3.3V) OUT 100mA I at 2.0V Input (SP6641A-5.0V) ...
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... BATT I SHDN Inductor Current Limit (SP6641A) Inductor Current Limit (SP6641B) Output Current (SP6641AEK-3.3) Output Current (SP6641BEK-3.3) Output Current (SP6641AEK-5.0) Output Current (SP6641BEK-5.0) Minimum Off-Time Constant K OFF NMOS Switch Resistance SHDN Input Voltage Vil Vih SHDN Input Current Rev. 5/26/05, *Patent Pending ...
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PIN DESCRIPTION PIN NO. PIN NAME GND 3 V OUT 4 SHDN 5 V BATT BLOCK DIAGRAM V BATT V BATT Internal V BATT V OUT V BATT SHDN Min. SHDN T OFF V OUT REFREADY Ref ...
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... AMB 100 0.1 1.0 10.0 Iload (mA) Figure 3. SP6641AEK - 3.3 Efficiency vs Load Current 3.400 3.380 2.6V 3.360 2.0V 3.340 IN 3.320 3.300 3.280 3.260 3.240 3.220 3.200 0 50 100 150 Iload (mA) Figure 5. SP6641AEK - 3.3 Line/Load Rejection vs Load Current 100 ...
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... Vi=3.3V Vi=2.0V 5.140 Vi=1.3V 5.120 5.100 5.080 5.060 5.040 5.020 5.000 0 50 100 150 Iload (mA) Figure 9. SP6641AEK-5.0 Line/Load Rejection Vs Load Current 250 SP6641AEK-5.0 200 SP6641AEK-3.3 150 100 50 0 0.5 1.0 1.5 2.0 2.5 3.0 Vin (V) Figure 11. SP6641AEK-3.3 & SP6641AEK-5.0 No Load ...
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OPERATION General Overview The SP6641 is a high efficiency, low quiescent current step-up DC-DC converter ideal for single and dual cell alkaline and single cell Lithium Ion battery applications such as medical monitors, PDA’s, MP3 players, and other portable end ...
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OPERATION Loop Regulation: continued The SP6641 feed forward off-time control de- livers more load current than constant off-time control because the input battery voltage drops during its life cycle. The term (I the average current delivered to the output ca- ...
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APPLICATION INFORMATION Circuit Layout Printed circuit board layout is a critical part of a power supply design. Poor designs can result in excessive EMI on the voltage gradients and feedback paths on the ground planes with appli- cations involving high ...
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APPLICATION INFORMATION: continued Maximum Startup Current It should be noted that for low input voltages the SP6641 startup circuit can not support large load currents at startup. In startup the SP6641 needs to boost the output from zero volts using ...
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APPLICATION INFORMATION: continued +0.9V to +3.3V Input V BATT L1 22µ SP6641 2 D1 GND 3 SHDN V OUT + C2 22µF Figure 15. SP6641A 3.3V Evaluation Board with SP6201 LDO Regulator SuperCap Application on the SP6641 ...
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APPLICATION INFORMATION: continued Low Battery Circuit for SP6641 Application The circuit in figure 17 uses the Sipex SPX432 shunt regulator as a reference and comparator circuit to detect a low battery condition and give a high level, typically 1.7V output. ...
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Rev. 5/26/05, *Patent Pending SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23 PACKAGE: 5 Lead SOT23 .10 SYMBOL MIN MAX ...
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... Part Number TOP MARK SP6641AEK-3.3/TR ............. K1 ...................... -40°C to 85°C ........ (Tape & Reel) 5-Pin SOT-23 SP6641BEK-3.3/TR ............. L1 ...................... -40°C to 85°C ........ (Tape & Reel) 5-Pin SOT-23 SP6641AEK-5.0/TR ............. P1 ...................... -40°C to 85°C ........ (Tape & Reel) 5-Pin SOT-23 SP6641BEK-5.0/TR ............. Q1 ...................... -40°C to 85°C ........ (Tape & Reel) 5-Pin SOT-23 Available in lead free packaging. To order add “ ...