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. 165-3329
Mfr. Part No.TC1240AECHTR
BrandMicrochip
£0.501
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. 768-1473
Mfr. Part No.TC1240AECHTR
BrandMicrochip
£0.578
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. 146-1138
Mfr. Part No.ICL7660CPA+
£1.382
Each (In a Tube of 50)
Units
Inverting, Step Up 225µA 10 kHz Through Hole PDIP 8 - 9.91 x 7.87 x 4.45mm 4.45mm 9.91mm 10 V +70 °C -1.5 V, 20 V 1.5 V
RS Stock No. 540-2912
Mfr. Part No.ICL7660CPA+
£2.32
Each
Units
Inverting, Step Up 225µA 10 kHz Through Hole PDIP 8 - 9.91 x 7.87 x 4.45mm 4.45mm 9.91mm 10 V +70 °C -1.5 V, 20 V 1.5 V
RS Stock No. 545-5988
Mfr. Part No.LTC1044CN8#PBF
£3.21
Each
Units
Inverting, Step Down, Step Up - - Through Hole PDIP 8 - 10.16 x 6.48 x 3.3mm 3.3mm 10.16mm 9 V +85 °C -1.5 V, 4.5 V 1.5 V
RS Stock No. 145-6358
Mfr. Part No.LTC1044CN8#PBF
£2.136
Each (In a Tube of 50)
Units
Inverting, Step Down, Step Up - - Through Hole PDIP 8 - 10.16 x 6.48 x 3.3mm 3.3mm 10.16mm - +85 °C -1.5 V, 4.5 V -
RS Stock No. 851-6768
Mfr. Part No.LTC3260EMSE#PBF
£6.62
Each
Units
Inverting 100mA 550 kHz Surface Mount MSOP 16 4.5 to 32 V 4.039 x 3 x 0.86mm 0.86mm 4.04mm 32 V +150 °C -32 V 4.5 V
RS Stock No. 145-1324
Mfr. Part No.LTC3260EMSE#PBF
£4.40
Each (In a Tube of 37)
Units
Inverting 100mA 550 kHz Surface Mount MSOP 16 4.5 → 32 V 4.039 x 3 x 0.86mm 0.86mm 4.04mm 32 V +150 °C -32 V 4.5 V
RS Stock No. 103-9930
Mfr. Part No.ICL7662CPA+
£2.734
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 10.033mm 20 V +70 °C -4.5 V 4.5 V
RS Stock No. 732-7642
Mfr. Part No.ICL7662CPA+
£3.13
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 +70 °C -4.5 V 4.5 V
RS Stock No. 823-4006
Mfr. Part No.TC1044SCPA
BrandMicrochip
£0.653
Each (In a Pack of 10)
Units
Charge Pump 20mA 45 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 12 V +70 °C -12 V 3 V
RS Stock No. 178-4969
Mfr. Part No.TC1044SCPA
BrandMicrochip
£0.632
Each (In a Tube of 60)
Units
Charge Pump 20mA 45 kHz Through Hole PDIP 8 - 10.16 x 6.6 x 4.06mm 4.06mm 10.16mm 12 V +70 °C -12 V 3 V
RS Stock No. 923-1411
Mfr. Part No.ICL7660CPAZ
£1.186
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 10 V +70 °C -1.5 V 1.5 V
RS Stock No. 921-5551
Mfr. Part No.ICL7660CPAZ
£1.402
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 10 V +70 °C -1.5 V 1.5 V
RS Stock No. 464-186
Mfr. Part No.NCP1729SN35T1G
£0.744
Each (In a Pack of 5)
Units
Inverting 100mA 35 kHz Surface Mount TSOP 6 - 3 x 1.5 x 0.94mm 0.94mm 3mm 5.5 V +150 °C -1.15 V 1.15 V
RS Stock No. 122-0078
Mfr. Part No.NCP1729SN35T1G
£0.296
Each (On a Reel of 3000)
Units
Inverting 100mA 35 kHz Surface Mount TSOP 6 - 3 x 1.5 x 0.94mm 0.94mm 3mm 5.5 V +150 °C -1.15 V 1.15 V
RS Stock No. 912-7211
Mfr. Part No.ADM660ARZ
£3.097
Each (In a Tube of 98)
Units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 7 V +85 °C 1.7 V, 14 V 1.5 V
RS Stock No. 412-585
Mfr. Part No.ADM660ARZ
£4.048
Each (In a Pack of 5)
Units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 7 V +85 °C 1.7 V, 14 V 1.5 V
RS Stock No. 165-9179
Mfr. Part No.MAX868EUB+
£1.862
Each (In a Tube of 50)
Units
Inverting 35mA 450 kHz Surface Mount μMAX 10 1.8 → 5.5 V 3.15 x 3.15 x 0.94mm 0.94mm 3.15mm 5.5 V +85 °C -3.6 V 1.8 V
RS Stock No. 732-7135
Mfr. Part No.MAX868EUB+
£2.82
Each
Units
Inverting 35mA 450 kHz Surface Mount μMAX 10 1.8 → 5.5 V 3.15 x 3.15 x 0.94mm 0.94mm 3.15mm 5.5 V +85 °C -3.6 V 1.8 V
Related Products
The easy-to-use inductorless Charge Pump ICs from Texas ...
Description:
The easy-to-use inductorless Charge Pump ICs from Texas Instruments offer a small-sized, simpler solution with high performance. The charge pump or switched-capacitor converter is an alternative solution to inductive DC-DC converters and delivers higher efficiency than Low Dropout (LDO) regulators. Buck (Step-Down), Boost (Step-Up) and Inverting topologies.
The easy-to-use inductorless Charge Pump ICs from Texas ...
Description:
The easy-to-use inductorless Charge Pump ICs from Texas Instruments offer a small-sized, simpler solution with high performance. The charge pump or switched-capacitor converter is an alternative solution to inductive DC-DC converters and delivers higher efficiency than Low Dropout (LDO) regulators. Buck (Step-Down), Boost (Step-Up) and Inverting topologies.