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. 177-7251
Mfr. Part No.LT1026CS8#PBF
HK$43.723
Each (In a Tube of 100)
units
Inverting - - Surface Mount SOIC 8 - 5.004 x 3.988 x 1.752mm 1.752mm 5mm 10 V +70 °C 18 V 4 V
RS Stock No. 162-8195
Mfr. Part No.LM2660MM/NOPB
HK$5.879
Each (On a Reel of 1000)
units
Inverting 100mA 80 kHz Surface Mount VSSOP 8 1.5 → 5.5 V 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 5.5 V +85 °C 5 V 1.5 V
RS Stock No. 146-1028
Mfr. Part No.MAX865EUA+
BrandMaxim
HK$18.48
Each (In a Tube of 50)
units
Inverting, Step Up - - Surface Mount μMAX 8 - 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 6 V +85 °C ±12 V 1.5 V
RS Stock No. 146-1040
Mfr. Part No.ICL7662EPA+
BrandMaxim
HK$42.75
Each (In a Tube of 50)
units
Inverting 20mA 10 kHz Through Hole PDIP 8 4.5 → 20 V 10.033 x 6.35 x 3.302mm 3.302mm 10.03mm 20 V +85 °C -4.5 V 4.5 V
RS Stock No. 170-0794
Mfr. Part No.SC630ULTRT
BrandSemtech
HK$7.953
Each (On a Reel of 3000)
units
Step Down, Step Up - - Surface Mount MLPD UT EP 8 - 2 x 2 x 0.55mm 0.55mm 2mm 5.5 V +85 °C - 2.9 V
RS Stock No. 145-6645
Mfr. Part No.TPS60313DGS
HK$11.824
Each (In a Tube of 80)
units
Step Up 40mA 900 kHz Surface Mount MSOP 10 0.9 → 18 V 3.1 x 3.1 x 0.95mm 0.95mm 3.1mm 18 V +125 °C 3.27 V 0.9 V
New
RS Stock No. 189-7012
Mfr. Part No.MAX865EUA+
BrandMaxim
HK$16.323
Each (In a Tube of 50)
units
Inverting, Step Up - - Surface Mount μMAX 8 - 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 6 V +85 °C ±12 V 1.5 V
RS Stock No. 177-7270
Mfr. Part No.LT1054IS8#PBF
HK$66.033
Each (In a Tube of 100)
units
Inverting 100mA 25 kHz Surface Mount SOIC 8 - - 1.498mm 5mm 15 V +100 °C - 3.5 V
RS Stock No. 779-8987
Mfr. Part No.LT1054IS8#PBF
HK$68.05
Each
units
Inverting 100mA 25 kHz Surface Mount SOIC 8 - - 1.498mm 5mm 15 V +100 °C - 3.5 V
RS Stock No. 165-9450
Mfr. Part No.MAX1044EPA+
BrandMaxim
HK$18.65
Each (In a Tube of 50)
units
Inverting 200µA 5 kHz Through Hole PDIP 8 30 V 9.91 x 7.87 x 4.45mm 4.45mm 9.91mm 200 V +150 °C 10 V -
RS Stock No. 912-6990
Mfr. Part No.TC7662BEOA
BrandMicrochip
HK$12.334
Each (In a Tube of 100)
units
Inverting 20mA 35 kHz Surface Mount SOIC 8 - 4.9 x 3.91 x 1.42mm 1.42mm 4.9mm 15 V +85 °C - 1.5 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
New
RS Stock No. 190-0503
Mfr. Part No.MAX619ESA+
BrandMaxim
HK$57.815
Each (In a Pack of 2)
units
Step Up 120mA 500 kHz Surface Mount SOIC 8 2 → 3.6 V 5 x 4 x 1.5mm 1.5mm 5mm 3.6 V +85 °C 5.2 V 2 V
RS Stock No. 146-1215
Mfr. Part No.MAX1044CSA+
BrandMaxim
HK$17.03
Each (In a Tube of 100)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 10 V +70 °C -1.5 V, 20 V 1.5 V
RS Stock No. 923-5618
Mfr. Part No.MAX680CSA+
BrandMaxim
HK$28.75
Each (In a Tube of 100)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 6 V +70 °C - 2 V
RS Stock No. 921-5591
Mfr. Part No.ICL7660SIBAZ
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 12 V +85 °C -1.5 V, 22.8 V 1.5 V
RS Stock No. 506-1779
Mfr. Part No.LTC3200EMS8#PBF
HK$33.08
Each
units
Step Up - - Surface Mount MSOP 8 - 3 x 3 x 0.86mm 0.86mm 3mm 4.5 V +85 °C 5.5 V 2.7 V
RS Stock No. 858-0677
Mfr. Part No.LTC3226EUD#PBF
HK$44.815
Each (In a Pack of 2)
units
Charge Pump 2A 1.05 MHz Surface Mount QFN 16 - 3 x 3 x 0.7mm 0.7mm 3mm 5.5 V +125 °C - 2.5 V
RS Stock No. 923-1430
Mfr. Part No.ICL7660ACPAZ
HK$9.308
Each (In a Tube of 50)
units
Inverting, Step Up - - Through Hole PDIP 8 - 10.16 x 7.11 x 4.95mm 4.95mm 10.16mm 12 V +70 °C -1.5 V 1.5 V
RS Stock No. 732-7658
Mfr. Part No.ICL7662EPA+
BrandMaxim
HK$37.85
Each
units
Inverting 20mA 10 kHz Through Hole PDIP 8 4.5 to 20 V 10.033 x 6.35 x 3.302mm 3.302mm 10.03mm 20 V +85 °C -4.5 V 4.5 V