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. 178-4969
Mfr. Part No.TC1044SCPA
BrandMicrochip
$1.309
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. 769-5416
Mfr. Part No.SP6661EN-L
BrandMaxLinear
$2.905
Each (In a Pack of 2)
units
Inverting, Voltage Doubler 200mA 1250 kHz Surface Mount SOIC 8 5 V 4.9 x 3.9 x 1.65mm 1.65mm 4.9mm 5.3 V +85 °C -5 V, 10 V 1.5 V
RS Stock No. 732-7113
Mfr. Part No.MAX829EUK+T
$8.21
Each
units
Inverting 50mA 35 kHz Surface Mount SOT-23 5 1 V 3 x 1.75 x 1.3mm 1.3mm 3mm 5.5 V +85 °C -1.5 V 1.25 V
RS Stock No. 165-3331
Mfr. Part No.TC1240ECHTR
BrandMicrochip
$1.222
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 9 V 2.5 V
RS Stock No. 177-7233
Mfr. Part No.LTC1144CS8#PBF
$9.203
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. 622-8721
Mfr. Part No.ICL7660CSA+
$4.14
Each
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
RS Stock No. 732-7658
Mfr. Part No.ICL7662EPA+
$9.48
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. 159-6626
Mfr. Part No.TC962COE
BrandMicrochip
$4.07
Each (In a Tube of 47)
units
Inverting 80mA 24 kHz Surface Mount SOIC W 16 - 10.3 x 7.49 x 2.31mm 2.31mm 10.3mm 18 V +70 °C -3 V 3 V
RS Stock No. 825-6866
Mfr. Part No.TPS60151DRVT
$2.508
Each (In a Pack of 5)
units
Charge Pump 120mA 1.5 MHz Surface Mount SON 6 2.7 → 5.5 V 2.1 x 2.1 x 0.75mm 0.75mm 2.1mm 5.5 V +85 °C 5.2 V 2.7 V
RS Stock No. 197-6142
Mfr. Part No.TC962CPA
BrandMicrochip
$5.226
Each (In a Pack of 5)
units
Charge Pump 80mA 24 kHz Through Hole PDIP 8 - - - - - - - -
RS Stock No. 662-4750
Mfr. Part No.LT1054IP
$5.566
Each (In a Pack of 5)
units
Inverting, Step Up - - Through Hole PDIP 8 - 9.81 x 6.35 x 4.57mm 4.57mm 9.81mm 15 V +85 °C - 3.5 V
RS Stock No. 858-0677
Mfr. Part No.LTC3226EUD#PBF
$12.27
Each (In a Pack of 2)
units
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
RS Stock No. 774-7888
Mfr. Part No.TC7660SEOA
BrandMicrochip
$1.518
Each (In a Bag of 5)
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. 912-6993
Mfr. Part No.TCM828ECT713
BrandMicrochip
$0.87
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. 884-7002
Mfr. Part No.LTC3245IDE#PBF
$14.45
Each (In a Pack of 2)
units
Buck Boost 250mA 500 kHz Surface Mount DFN 12 12 V 4 x 3 x 0.7mm 0.7mm 4mm 38 V +125 °C 5 V 2.7 V
RS Stock No. 121-8416
Mfr. Part No.TPS60400DBVT
$1.07
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. 540-4716
Mfr. Part No.SI7661CSA+
$5.05
Each
units
Inverting - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 20 V +70 °C -4.5 V 4.5 V
RS Stock No. 122-0078
Mfr. Part No.NCP1729SN35T1G
$0.729
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. 145-6645
Mfr. Part No.TPS60313DGS
$3.399
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
RS Stock No. 823-0852
Mfr. Part No.TCM828ECT713
BrandMicrochip
$0.826
Each (In a Pack of 20)
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
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