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. 821-1227
Mfr. Part No.TC7662BEOA713
BrandMicrochip
HK$11.211
Each (On a Reel of 3300)
units
Charge Pump 20mA 35 kHz Surface Mount SOIC 8 - 5 x 3.99 x 1.5mm 1.5mm 5mm 15 V +85 °C -15 V 1.5 V
RS Stock No. 422-554
Mfr. Part No.TPS60110PWP
HK$19.818
Each (In a Pack of 5)
units
Step Up - - Surface Mount HTSSOP 20 - 6.5 x 4.4 x 1.15mm 1.15mm 6.5mm 5.4 V +85 °C - 2.7 V
RS Stock No. 786-0871
Mfr. Part No.MAX1044CPA+
BrandMaxim
HK$21.145
Each (In a Pack of 2)
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 +70 °C 10 V -
RS Stock No. 165-9141
Mfr. Part No.MAX660CSA+
BrandMaxim
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. 165-9076
Mfr. Part No.MAX662ACPA+
BrandMaxim
HK$29.52
Each (In a Tube of 50)
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
RS Stock No. 732-7649
Mfr. Part No.ICL7662CBD+
BrandMaxim
HK$26.03
Each
units
Inverting 20mA 10 kHz Surface Mount SOIC 14 4.5 to 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. 800-9866
Mfr. Part No.CAT3200HU2-GT3
HK$12.438
Each (In a Pack of 5)
units
Charge Pump 100mA 2.6 MHz Surface Mount UDFN 8 - 2 x 2 x 0.5mm 0.5mm 2mm 4.5 V +85 °C 5.2 V 2.7 V
RS Stock No. 662-4753
Mfr. Part No.LT1054CDW
HK$23.954
Each (In a Pack of 5)
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
RS Stock No. 165-4689
Mfr. Part No.MCP1252-ADJI/MS
BrandMicrochip
HK$9.01
Each (In a Tube of 100)
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. 145-7645
Mfr. Part No.LTC1261CS8#PBF
HK$24.047
Each (In a Tube of 100)
units
Inverting, Step Up 15mA 550 kHz Surface Mount SOIC 8 3 → 8 V 5.004 x 3.988 x 1.498mm 1.498mm 5mm 8 V +70 °C -8 V 3 V
RS Stock No. 145-5703
Mfr. Part No.ADM660ANZ
HK$25.591
Each (In a Tube of 50)
units
Inverting, Step Up - - Through Hole PDIP 8 - 9.27 x 7.24 x 3.43mm 3.43mm 9.27mm 7 V +85 °C 1.7 V, 14 V 1.5 V
New
RS Stock No. 190-0262
Mfr. Part No.MAX865EUA+
BrandMaxim
HK$27.954
Each (In a Pack of 5)
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. 403-705
Mfr. Part No.MCP1253-ADJI/MS
BrandMicrochip
HK$8.076
Each (In a Pack of 5)
units
Step Down, Step Up 120mA 1 MHz 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. 153-3477
Mfr. Part No.LTC1144CN8#PBF
HK$32.905
Each (In a Tube of 50)
units
Step Down - - Through Hole PDIP 8 - 10.16 x 6.48 x 3.3mm 3.3mm 10.16mm - +70 °C -2 V -
RS Stock No. 889-5572
Mfr. Part No.MCP1253-33X50I/MS
BrandMicrochip
HK$8.898
Each (In a Tube of 100)
units
Step Down/Step Up 120mA 1 MHz Surface Mount MSOP 8 - 3 x 3 x 0.85mm 0.85mm 3mm 5.5 V +85 °C - 2.1 V
RS Stock No. 177-7233
Mfr. Part No.LTC1144CS8#PBF
HK$59.003
Each (In a Tube of 100)
units
Step Down - - Surface Mount SOIC 8 - 5 x 3.99 x 1.48mm 1.48mm 5mm 18 V +70 °C -2 V 2 V
RS Stock No. 146-0202
Mfr. Part No.MCP1256-E/UN
BrandMicrochip
HK$9.609
Each (In a Tube of 100)
units
Regulated 100mA 650 kHz Surface Mount MSOP 10 - 3 x 3 x 0.95mm 0.95mm 3mm 3.6 V +125 °C 3.3 V 1.8 V
RS Stock No. 732-7630
Mfr. Part No.ICL7660ESA+
BrandMaxim
HK$36.08
Each
units
Inverting, Step Up 20mA - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 10 V +85 °C - 1.5 V
RS Stock No. 822-5878
Mfr. Part No.LTC1261CS8#PBF
HK$27.545
Each (In a Pack of 2)
units
Inverting, Step Up 15mA 550 kHz Surface Mount SOIC 8 3 to 8 V 5.004 x 3.988 x 1.498mm 1.498mm 5mm 8 V +70 °C -8 V 3 V
RS Stock No. 146-1214
Mfr. Part No.ICL7662CBA+
BrandMaxim
HK$26.884
Each (In a Tube of 100)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 20 V +70 °C -4.5 V 4.5 V