Charge Pumps

Charge pumps are DC to DC converters that are often needed in designs requiring more than one dc supply voltage. It’s made up of switches and capacitors. The switches are usually diodes in discrete designs but are also MOSFETs in IC versions. The capacitors are electrolytic or ceramics depending on the switching speed. There’s no need for an inductor. Charge pumps can double, triple, halve voltages but they can also invert or scale voltages. They are commonly used in low-power electronic devices to suit a voltage for different parts of the circuit.
Charge Pumps have a few advantages over the majority of other types of DC-DC converters and they are:
• Simplicity in build
• Lower cost of production
• Fewer components
• No inductor
• Higher efficiency than linear

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Description Price Converter Type Maximum Output Current Maximum Switching Frequency Mounting Type Package Type Pin Count Typical Operating Supply Voltage Dimensions Height Length Maximum Operating Supply Voltage Maximum Operating Temperature Maximum Output Voltage Minimum Operating Supply Voltage
RS Stock No. 121-8407
Mfr. Part No.LT1054CP
HK$17.977
Each (In a Tube of 50)
units
Inverting, Step Up - - Through Hole PDIP 8 - 9.81 x 6.35 x 4.57mm 4.57mm 9.81mm 15 V +70 °C - 3.5 V
RS Stock No. 526-763
Mfr. Part No.LT1054CP
HK$25.26
Each (In a Pack of 5)
units
Inverting, Step Up - - Through Hole PDIP 8 - 9.81 x 6.35 x 4.57mm 4.57mm 9.81mm 15 V +70 °C - 3.5 V
RS Stock No. 165-9505
Mfr. Part No.MAX889RESA+
HK$26.95
Each (In a Tube of 100)
units
Inverting 200mA 0.62 MHz Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +85 °C -5.5 V 2.7 V
RS Stock No. 786-1300
Mfr. Part No.MAX889RESA+
HK$41.32
Each (In a Pack of 2)
units
Inverting 200mA 0.62 MHz Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +85 °C -5.5 V 2.7 V
RS Stock No. 121-8323
Mfr. Part No.MAX660M/NOPB
HK$10.224
Each (In a Tube of 95)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V +85 °C -1.5 V 1.5 V
RS Stock No. 460-588
Mfr. Part No.MAX660M/NOPB
HK$13.944
Each (In a Pack of 5)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V +85 °C -1.5 V 1.5 V
RS Stock No. 662-4750
Mfr. Part No.LT1054IP
HK$24.094
Each (In a Pack of 5)
units
Inverting, Step Up - - Through Hole PDIP 8 - 9.81 x 6.35 x 4.57mm 4.57mm 9.81mm 15 V +85 °C - 3.5 V
RS Stock No. 165-3329
Mfr. Part No.TC1240AECHTR
BrandMicrochip
HK$5.38
Each (On a Reel of 3000)
units
Voltage Doubler 50mA 125 kHz Surface Mount SOT-23 6 3.25 V 3.1 x 1.75 x 1.3mm 1.3mm 3.1mm 4 V +85 °C 11.6 V 2.5 V
RS Stock No. 177-7310
Mfr. Part No.LTC1046CS8#PBF
HK$51.992
Each (In a Tube of 100)
units
Inverting, Step Down/Step Up 50mA 30 kHz Surface Mount SOIC 8 - 5.004 x 3.988 x 1.498mm 1.498mm 5mm 6 V +70 °C - 1.5 V
RS Stock No. 768-1473
Mfr. Part No.TC1240AECHTR
BrandMicrochip
HK$6.47
Each (In a Pack of 10)
units
Voltage Doubler 50mA 125 kHz Surface Mount SOT-23 6 3.25 V 3.1 x 1.75 x 1.3mm 1.3mm 3.1mm 4 V +85 °C 11.6 V 2.5 V
RS Stock No. 923-5609
Mfr. Part No.MAX660ESA+
HK$52.20
Each (In a Tube of 100)
units
Inverting, Step Up 100mA - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +85 °C - 1.5 V
RS Stock No. 533-3951
Mfr. Part No.LM2662M/NOPB
HK$20.22
Each
units
Inverting, Step Down, Step Up 200mA - Surface Mount SOIC 8 - 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V +85 °C -1.5 V 1.5 V
RS Stock No. 920-3624
Mfr. Part No.LM2662M/NOPB
HK$14.484
Each (In a Tube of 95)
units
Inverting, Step Down, Step Up 200mA - Surface Mount SOIC 8 - 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 5.5 V +85 °C -1.5 V 1.5 V
RS Stock No. 922-2748
Mfr. Part No.LT1054IP
HK$19.031
Each (In a Tube of 50)
units
Inverting, Step Up - - Through Hole PDIP 8 - 9.81 x 6.35 x 4.57mm 4.57mm 9.81mm 15 V +85 °C - 3.5 V
RS Stock No. 921-5557
Mfr. Part No.ICL7660CBAZ
HK$13.398
Each (In a Pack of 5)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 10 V +70 °C -1.5 V 1.5 V
RS Stock No. 732-6804
Mfr. Part No.MAX660ESA+
HK$72.50
Each
units
Inverting, Step Up 100mA - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +85 °C - 1.5 V
RS Stock No. 919-9483
Mfr. Part No.LTC3200ES6-5#TRMPBF
HK$22.228
Each (On a Reel of 500)
units
Charge Pump, Regulated 150mA 2000 kHz Surface Mount SOT-23 6 - 3.1 x 1.75 x 1.3mm 1.3mm 3.1mm 4.5 V +85 °C 5.2 V 2.7 V
RS Stock No. 923-1402
Mfr. Part No.ICL7660CBAZ
HK$9.307
Each (In a Tube of 98)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 10 V +70 °C -1.5 V 1.5 V
RS Stock No. 786-9755
Mfr. Part No.LTC1046CS8#PBF
HK$56.34
Each
units
Inverting, Step Down/Step Up 50mA 30 kHz Surface Mount SOIC 8 - 5.004 x 3.988 x 1.498mm 1.498mm 5mm 6 V +70 °C - 1.5 V
RS Stock No. 761-9383
Mfr. Part No.LTC3200ES6-5#TRMPBF
HK$32.87
Each
units
Charge Pump, Regulated 150mA 2000 kHz Surface Mount SOT-23 6 - 3.1 x 1.75 x 1.3mm 1.3mm 3.1mm 4.5 V +85 °C 5.2 V 2.7 V