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. 768-1473
Mfr. Part No.TC1240AECHTR
BrandMicrochip
HK$7.02
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. 165-3329
Mfr. Part No.TC1240AECHTR
BrandMicrochip
HK$5.66
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. 872-2464
Mfr. Part No.TC7660CPA
BrandMicrochip
HK$5.65
Each (In a Tube of 60)
units
- - - Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm - +70 °C 10 V -
RS Stock No. 165-2030
Mfr. Part No.TC962EPA
BrandMicrochip
HK$20.71
Each (In a Tube of 60)
units
Inverting 80mA 24 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 18 V +85 °C -18 V 3 V
RS Stock No. 774-7898
Mfr. Part No.TC962EPA
BrandMicrochip
HK$25.15
Each (In a Bag of 2)
units
Inverting 80mA 24 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 18 V +85 °C -18 V 3 V
RS Stock No. 207-0297
Mfr. Part No.TC7660CPA
BrandMicrochip
HK$6.85
Each
units
- - - Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm - +70 °C 10 V -
RS Stock No. 889-5572
Mfr. Part No.MCP1253-33X50I/MS
BrandMicrochip
HK$9.41
Each (In a Tube of 100)
units
Step Down/Step Up 120mA 1 MHz Surface Mount MSOP 8 - 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V +85 °C - 2.1 V
RS Stock No. 165-4688
Mfr. Part No.MCP1253-ADJI/MS
BrandMicrochip
HK$9.41
Each (In a Tube of 100)
units
Step Down, Step Up 120mA 1 MHz Surface Mount MSOP 8 - 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V +85 °C 5.5 V 2 V
RS Stock No. 159-6626
Mfr. Part No.TC962COE
BrandMicrochip
HK$20.71
Each (In a Tube of 47)
units
Inverting 80mA 24 kHz Surface Mount SOIC W 16 - 10.3 x 7.49 x 2.31mm 2.31mm 10.3mm 18 V +70 °C -3 V 3 V
RS Stock No. 207-0281
Mfr. Part No.TC7660COA
BrandMicrochip
HK$6.85
Each
units
- - - Surface Mount SOIC 8 - 4.9 x 3.91 x 1.42mm 1.42mm 4.9mm - +70 °C 10 V -
RS Stock No. 159-7436
Mfr. Part No.TC7660SEPA
BrandMicrochip
HK$6.42
Each (In a Tube of 60)
units
Inverting 20mA 45 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 12 V +85 °C -12 V 1.5 V
RS Stock No. 669-6313
Mfr. Part No.TC962COE
BrandMicrochip
HK$24.82
Each (In a Pack of 2)
units
Inverting 80mA 24 kHz Surface Mount SOIC W 16 - 10.3 x 7.49 x 2.31mm 2.31mm 10.3mm 18 V +70 °C -3 V 3 V
RS Stock No. 403-715
Mfr. Part No.MCP1252-33X50I/MS
BrandMicrochip
HK$11.86
Each (In a Pack of 5)
units
Step Down, Step Up 150mA 650 kHz Surface Mount MSOP 8 - 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V +85 °C - 2.1 V
RS Stock No. 403-705
Mfr. Part No.MCP1253-ADJI/MS
BrandMicrochip
HK$11.72
Each (In a Pack of 5)
units
Step Down, Step Up 120mA 1 MHz Surface Mount MSOP 8 - 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V +85 °C 5.5 V 2 V
RS Stock No. 159-7412
Mfr. Part No.TC7662AEPA
BrandMicrochip
HK$25.76
Each (In a Tube of 60)
units
Inverting 40mA 12 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 18 V +85 °C - 3 V
RS Stock No. 774-7636
Mfr. Part No.TC1044SEPA
BrandMicrochip
HK$7.96
Each (In a Bag of 5)
units
Inverting 20mA 45 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 12 V +85 °C -12 V 1.5 V
New
RS Stock No. 197-6141
Mfr. Part No.TC962CPA
BrandMicrochip
HK$13.173
Each (In a Tube of 60)
units
Charge Pump 80mA 24 kHz Through Hole PDIP 8 - - - - - - - -
RS Stock No. 165-4689
Mfr. Part No.MCP1252-ADJI/MS
BrandMicrochip
HK$9.41
Each (In a Tube of 100)
units
Step Down, Step Up 120mA 650 kHz Surface Mount MSOP 8 - 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V +85 °C 5.5 V 2 V
RS Stock No. 165-2095
Mfr. Part No.TC7660EOA
BrandMicrochip
HK$5.13
Each (In a Tube of 100)
units
Inverting 20mA 10 kHz Surface Mount SOIC 8 - 4.9 x 3.9 x 1.5mm 1.5mm 4.9mm 10 V +85 °C -10 V 1.5 V
RS Stock No. 821-1227
Mfr. Part No.TC7662BEOA713
BrandMicrochip
HK$14.38
Each (On a Reel of 3300)
units
Charge Pump 20mA 35 kHz Surface Mount SOIC 8 - 5 x 3.99 x 1.5mm 1.5mm 5mm 15 V +85 °C -15 V 1.5 V