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. 121-8416
Mfr. Part No.TPS60400DBVT
HK$6.18
Each (On a Reel of 250)
units
Inverting, Step Down/Step Up - - Surface Mount SOT-23 5 - 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 5.25 V +125 °C -1.6 V 1.8 V
RS Stock No. 732-7153
Mfr. Part No.MAX889TESA+
BrandMaxim
HK$39.56
Each
units
Inverting 250mA 2000 kHz Surface Mount SOIC 8 2.7 → 5.5 V 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +85 °C -2.5 V 2.7 V
RS Stock No. 761-9276
Mfr. Part No.LTC1983ES6-5#TRMPBF
HK$38.24
Each
units
Charge Pump, Regulated 125mA - Surface Mount SOT-23 6 - 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 5.5 V +85 °C -5.2 V 3 V
RS Stock No. 160-9936
Mfr. Part No.ADM8828ARTZ-REEL7
HK$11.877
Each (On a Reel of 3000)
units
Voltage 50mA 190 kHz Surface Mount SOT-23 6 - 3.1 x 1.8 x 1.3mm 1.3mm 3.1mm 5.5 V +85 °C -5.5 V 1.5 V
RS Stock No. 858-0876
Mfr. Part No.LTC1983ES6-3#TRMPBF
HK$32.065
Each (In a Pack of 2)
units
Charge Pump 100mA 900 kHz Surface Mount SOT-23 6 - 2.9 x 1.75 x 0.9mm 0.9mm 2.9mm 5.5 V +85 °C -3.12 V 2.3 V
RS Stock No. 732-6854
Mfr. Part No.MAX682ESA+
BrandMaxim
HK$45.62
Each
units
Step Down 300mA 2000 kHz Surface Mount SOIC 8 2.7 → 5.5 V 5 x 4 x 1.5mm 1.5mm 5mm 5.5 V +85 °C 5.2 V 2.7 V
RS Stock No. 422-520
Mfr. Part No.TPS60130PWP
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. 165-9450
Mfr. Part No.MAX1044EPA+
BrandMaxim
HK$18.65
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. 422-508
Mfr. Part No.TPS60210DGS
HK$14.454
Each (In a Pack of 5)
units
Step Up - - Surface Mount MSOP 10 - 3 x 3 x 1.02mm 1.02mm 3mm 3.6 V +85 °C - 1.8 V
RS Stock No. 540-2423
Mfr. Part No.MAX881REUB+
BrandMaxim
HK$34.96
Each
units
Inverting - - Surface Mount μMAX 10 - 3.05 x 3.05 x 0.95mm 0.95mm 3.05mm 5.5 V +85 °C -0.5 V 2.5 V
RS Stock No. 851-6761
Mfr. Part No.LTC3261IMSE#PBF
HK$52.86
Each
units
Inverting 100mA 550 kHz Surface Mount MSOP 12 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. 165-9284
Mfr. Part No.ICL7662EBA+
BrandMaxim
HK$40.502
Each (In a Tube of 100)
units
Inverting 20mA 10 kHz Surface Mount SOIC 8 4.5 → 20 V 8.737 x 4.013 x 1.55mm 1.55mm 8.74mm 20 V +85 °C -4.5 V 4.5 V
New
RS Stock No. 189-6916
Mfr. Part No.MAX1044EPA+
BrandMaxim
HK$18.216
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. 772-8792
Mfr. Part No.MCP1259-E/MF
BrandMicrochip
HK$13.208
Each (In a Tube of 5)
units
Charge Pump 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. 732-7646
Mfr. Part No.ICL7662EBA+
BrandMaxim
HK$31.42
Each
units
Inverting 20mA 10 kHz Surface Mount SOIC 8 4.5 to 20 V 8.737 x 4.013 x 1.55mm 1.55mm 8.74mm 20 V +85 °C -4.5 V 4.5 V
RS Stock No. 774-7636
Mfr. Part No.TC1044SEPA
BrandMicrochip
HK$7.584
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. 912-6993
Mfr. Part No.TCM828ECT713
BrandMicrochip
HK$2.627
Each (On a Reel of 3000)
units
Voltage 25mA 12 kHz Surface Mount SOT-23 5 1.5 → 5.5 V 3.1 x 1.8 x 1.3mm 1.3mm 3.1mm 5.5 V +85 °C 6 V 1.5 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. 786-9746
Mfr. Part No.LTC1044AIS8#PBF
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
RS Stock No. 145-6645
Mfr. Part No.TPS60313DGS
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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