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
Charge Pumps
293
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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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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RS Stock No.
165-9179
Mfr. Part No.MAX868EUB+
BrandMaxim Integrated
|
HK$19.85
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.
146-0207
Mfr. Part No.TC7660SEOA
BrandMicrochip
|
HK$5.041
Each (In a Tube of 100)
units
|
Inverting | 20mA | 45 kHz | Surface Mount | SOIC | 8 | - | 5 x 3.99 x 1.5mm | 1.5mm | 5mm | 12 V | +85 °C | -12 V | 1.5 V |
|
RS Stock No.
146-1028
Mfr. Part No.MAX865EUA+
BrandMaxim Integrated
|
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 |
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RS Stock No.
872-2461
Mfr. Part No.TC7660COA
BrandMicrochip
|
HK$5.20
Each (In a Tube of 100)
units
|
- | - | - | Surface Mount | SOIC | 8 | - | 4.9 x 3.91 x 1.42mm | 1.42mm | 4.9mm | - | +70 °C | 10 V | - |
|
New
|
RS Stock No.
190-0321
Mfr. Part No.MAX868EUB+
BrandMaxim Integrated
|
HK$32.614
Each (In a Pack of 5)
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.
145-6358
Mfr. Part No.LTC1044CN8#PBF
BrandAnalog Devices
|
HK$22.66
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.
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.
732-7658
Mfr. Part No.ICL7662EPA+
BrandMaxim Integrated
|
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 |
|
RS Stock No.
177-7264
Mfr. Part No.LTC1044ACS8#PBF
BrandAnalog Devices
|
HK$56.571
Each (In a Tube of 100)
units
|
Inverting, Step Up | 20µA | - | Surface Mount | SOIC | 8 | - | 5.004 x 3.988 x 1.752mm | 1.752mm | 5mm | 12 V | +70 °C | - | 1.5 V |
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RS Stock No.
162-6768
Mfr. Part No.TPS60150DRVT
BrandTexas Instruments
|
HK$8.195
Each (On a Reel of 250)
units
|
Charge Pump | 140mA | 1.5 MHz | Surface Mount | SON | 6 | - | 2.1 x 2.1 x 0.75mm | 0.75mm | 2.1mm | 5.5 V | +85 °C | 5.2 V | 2.7 V |
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RS Stock No.
178-4969
Mfr. Part No.TC1044SCPA
BrandMicrochip
|
HK$6.76
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 |
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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 Integrated
|
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 |
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RS Stock No.
146-1040
Mfr. Part No.ICL7662EPA+
BrandMaxim Integrated
|
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.
798-7894
Mfr. Part No.MAX861ESA+
BrandMaxim Integrated
|
HK$43.91
Each
units
|
Inverting | 50mA | 250 kHz | Surface Mount | SOIC | 8 | 5 V | 5 x 4 x 1.5mm | 1.5mm | 5mm | 5.5 V | +85 °C | -4 V | 2.5 V |
|
New
|
RS Stock No.
189-7016
Mfr. Part No.MAX870EUK+T
BrandMaxim Integrated
|
HK$22.356
Each (On a Reel of 2500)
units
|
Inverting | 50mA | 125 kHz | Surface Mount | SOT-23 | 5 | 1 V | 3 x 3 x 1.3mm | 1.3mm | 3mm | 5.5 V | +85 °C | -1.4 V | 1.4 V |
|
RS Stock No.
412-585
Mfr. Part No.ADM660ARZ
BrandAnalog Devices
|
HK$38.486
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 |
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RS Stock No.
178-9156
Mfr. Part No.LT1054CDW
BrandTexas Instruments
|
HK$28.938
Each (In a Tube of 40)
units
|
Inverting, Step Up | - | - | Surface Mount | SOIC | 16 | - | 10.28 x 7.52 x 2.35mm | 2.35mm | 10.28mm | 15 V | +70 °C | - | 3.5 V |
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RS Stock No.
146-1213
Mfr. Part No.ICL7660CSA+
BrandMaxim Integrated
|
HK$16.77
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 |
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Linear Technology LTC1044AIS8#PBF, Voltage Converter Step Up 200μA 5 kHz, Maximum of 5 V 8-Pin, SOIC
RS Stock No.
786-9746
Mfr. Part No.LTC1044AIS8#PBF
BrandAnalog Devices
|
HK$41.59
Each (In a Pack of 2)
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 |
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