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
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Filters
| 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.
177-7251
Mfr. Part No.LT1026CS8#PBF
BrandAnalog Devices
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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
BrandTexas Instruments
|
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 |
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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 |
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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 |
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RS Stock No.
145-6645
Mfr. Part No.TPS60313DGS
BrandTexas Instruments
|
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 |
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New
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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 |
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RS Stock No.
177-7270
Mfr. Part No.LT1054IS8#PBF
BrandAnalog Devices
|
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 |
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RS Stock No.
779-8987
Mfr. Part No.LT1054IS8#PBF
BrandAnalog Devices
|
HK$68.05
Each
units
|
Inverting | 100mA | 25 kHz | Surface Mount | SOIC | 8 | - | - | 1.498mm | 5mm | 15 V | +100 °C | - | 3.5 V |
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RS Stock No.
165-9450
Mfr. Part No.MAX1044EPA+
BrandMaxim
|
HK$18.65
Each (In a Tube of 50)
units
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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 | - |
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RS Stock No.
912-6990
Mfr. Part No.TC7662BEOA
BrandMicrochip
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HK$12.334
Each (In a Tube of 100)
units
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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 |
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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
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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 |
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New
|
RS Stock No.
190-0503
Mfr. Part No.MAX619ESA+
BrandMaxim
|
HK$57.815
Each (In a Pack of 2)
units
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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.
146-1215
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 |
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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 |
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RS Stock No.
921-5591
Mfr. Part No.ICL7660SIBAZ
BrandRenesas Electronics
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HK$13.398
Each (In a Pack of 5)
units
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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 |
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RS Stock No.
506-1779
Mfr. Part No.LTC3200EMS8#PBF
BrandAnalog Devices
|
HK$33.08
Each
units
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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 |
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RS Stock No.
858-0677
Mfr. Part No.LTC3226EUD#PBF
BrandAnalog Devices
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HK$44.815
Each (In a Pack of 2)
units
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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 |
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RS Stock No.
923-1430
Mfr. Part No.ICL7660ACPAZ
BrandRenesas Electronics
|
HK$9.308
Each (In a Tube of 50)
units
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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 |
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RS Stock No.
732-7658
Mfr. Part No.ICL7662EPA+
BrandMaxim
|
HK$37.85
Each
units
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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 |
