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TPS60503 Datasheet(PDF) 10 Page - Texas Instruments

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Part # TPS60503
Description  TPS6050x High-Efficiency, 250-mA Step-Down Charge Pump
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TPS60503 Datasheet(HTML) 10 Page - Texas Instruments

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SW1
SW2
SW3
SW4
SW9
SW5
SW6
SW7
SW8
+
+
+
VIN
OUT
Co
SW1
SW2
SW3
SW4
SW9
SW5
SW6
SW7
SW8
+
+
+
VIN
OUT
Co
C1F
C2F
C1F
C2F
Phase 1: Charging of Flying Caps
Phase 2: Discharging of Flying Caps
C1F
C2F
SW1
SW2
SW3
SW4
SW9
SW5
SW6
SW7
SW8
+
+
+
VIN
OUT
Co
SW1
SW2
SW3
SW4
SW9
SW5
SW6
SW7
SW8
+
+
+
VIN
OUT
Co
C1F
C2F
Phase 1: Charging of Flying Caps
Phase 2: Discharging of Flying Caps
TPS60500, TPS60501, TPS60502, TPS60503
SLVS391C – OCTOBER 2001 – REVISED SEPTEMBER 2015
www.ti.com
Device Functional Modes (continued)
8.4.2.3 0.5x Conversion Mode
This conversion mode is internally selected if the input to output voltage ratio is greater than two (for example,
3.6-V to 1.5-V conversion). In the 0.5x mode, the flying capacitors and the switches always work in parallel,
which reduces the resistance of the circuit compared to the other modes. In the first cycle, the flying capacitors
are charged in series with the output capacitors. In the second cycle, the flying capacitors are connected in
parallel with the output capacitor, which discharges the flying capacitors.
Figure 5. 0.5x Conversion Mode
8.4.2.4 1/3x Conversion Mode
This mode was implemented to provide high efficiency even with an input to output voltage ratio greater than
three (for example, 5-V to 1.5-V conversion). In the first cycle, the two flying capacitors are charged in series with
the output capacitor. In the next step, the flying capacitors which are charged to VIN/3, are connected in parallel
to the output capacitor.
Figure 6. 1/3x Conversion Mode
10
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Copyright © 2001–2015, Texas Instruments Incorporated
Product Folder Links: TPS60500 TPS60501 TPS60502 TPS60503


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