Charge Pumps

Charge pumps are DC to DC converters that are often needed in designs requiring more than one dc supply voltage. Its 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. Theres 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. 923-1449
Mfr. Part No.ICL7660SIBAZ
HK$12.407
Each (In a Tube of 98)
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
New
RS Stock No. 189-6910
Mfr. Part No.ICL7662CBD+
HK$27.754
Each (In a Tube of 50)
units
Inverting 20mA 10 kHz Surface Mount SOIC 14 4.5 20 V 8.737 x 4.013 x 1.55mm 1.55mm 8.737mm 20 V +70 °C -4.5 V 4.5 V
RS Stock No. 403-727
Mfr. Part No.MCP1252-ADJI/MS
BrandMicrochip
HK$11.828
Each (In a Pack of 5)
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. 912-2944
Mfr. Part No.MCP1252-33X50I/MS
BrandMicrochip
HK$8.722
Each (In a Tube of 100)
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. 622-8923
Mfr. Part No.MAX662ACPA+
HK$40.37
Each
units
Step Up - - Through Hole PDIP 8 - 9.91 x 7.87 x 4.45mm 4.45mm 9.91mm 5.5 V +70 °C - 4.5 V
New
RS Stock No. 190-0565
Mfr. Part No.MAX829EUK+T
HK$47.315
Each (In a Pack of 2)
units
Inverting 50mA 35 kHz Surface Mount SOT-23 5 1 V 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V +85 °C -1.5 V 1.25 V
RS Stock No. 165-9141
Mfr. Part No.MAX660CSA+
HK$38.85
Each (In a Tube of 100)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +70 °C -1.5 V, 11 V 1.5 V
RS Stock No. 774-7882
Mfr. Part No.TC7660SEPA
BrandMicrochip
HK$7.592
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
RS Stock No. 422-378
Mfr. Part No.TPS60310DGS
HK$18.62
Each (In a Pack of 5)
units
Step Up - - Surface Mount MSOP 10 - 3 x 3 x 1.02mm 1.02mm 3mm 1.8 V +125 °C 3.6 V 0.9 V
New
RS Stock No. 190-0108
Mfr. Part No.ICL7662CBD+
HK$32.702
Each (In a Pack of 5)
units
Inverting 20mA 10 kHz Surface Mount SOIC 14 4.5 → 20 V 8.737 x 4.013 x 1.55mm 1.55mm 8.74mm 20 V +70 °C -4.5 V 4.5 V
RS Stock No. 177-7309
Mfr. Part No.LTC1044AIS8#PBF
HK$37.422
Each (In a Tube of 100)
units
Step Up 200µA 5 kHz Surface Mount SOIC 8 5 V 5.004 x 3.988 x 1.498mm 1.498mm 5mm 12 V +85 °C 3.5 V, 5 V 1.5 V
RS Stock No. 100-3887
Mfr. Part No.LM2665M6/NOPB
HK$3.162
Each (On a Reel of 1000)
units
Step Up - - Surface Mount SOT-23 6 - 2.92 x 1.6 x 1.02mm 1.02mm 2.92mm 5.5 V +85 °C 11 V 2.5 V
RS Stock No. 732-7113
Mfr. Part No.MAX829EUK+T
HK$42.23
Each
units
Inverting 50mA 35 kHz Surface Mount SOT-23 5 1 V 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V +85 °C -1.5 V 1.25 V
RS Stock No. 889-5339
Mfr. Part No.MCP1257-E/MF
BrandMicrochip
HK$9.31
Each (In a Tube of 120)
units
Regulated 100mA 650 kHz Surface Mount DFN 10 - 3.15 x 3.15 x 0.95mm 0.95mm 3.15mm 3.6 V +125 °C 3.3 V 1.8 V
RS Stock No. 622-8721
Mfr. Part No.ICL7660CSA+
HK$23.14
Each
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. 145-6799
Mfr. Part No.LT1054CS8#PBF
HK$38.425
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. 422-211
Mfr. Part No.TPS60243DGKT
HK$11.706
Each (In a Pack of 5)
units
Step Up - - Surface Mount MSOP 8 - 3 x 3 x 0.97mm 0.97mm 3mm 5.5 V +85 °C - 1.8 V
RS Stock No. 704-4482
Mfr. Part No.ICL7660ACPAZ
HK$14.722
Each (In a Pack of 5)
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. 165-9450
Mfr. Part No.MAX1044EPA+
HK$19.12
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. 884-7002
Mfr. Part No.LTC3245IDE#PBF
HK$64.38
Each (In a Pack of 2)
units
Buck Boost 250mA 500 kHz Surface Mount DFN 12 12 V 4 x 3 x 0.7mm 0.7mm 4mm 38 V +125 °C 5 V 2.7 V
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