Charge Pumps

Charge pumps are DC to DC converters that are often needed in designs requiring more than one dc supply voltage. Its 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. Theres 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. 823-4006
Mfr. Part No.TC1044SCPA
BrandMicrochip
$1.999
Each (In a Pack of 10)
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. 133-0662
Mfr. Part No.LM27761DSGT
$3.086
Each (In a Pack of 5)
units
Inverting 250mA 2.3 MHz Surface Mount WSON 8 - 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. 403-604
Mfr. Part No.MCP1253-33X50I/MS
BrandMicrochip
$2.32
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 - 2.1 V
RS Stock No. 669-6313
Mfr. Part No.TC962COE
BrandMicrochip
$4.915
Each (In a Pack of 2)
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. 761-7970
Mfr. Part No.LT1026CS8#PBF
$9.14
Each
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. 158-0362
Mfr. Part No.LTC3245IDE#PBF
$8.591
Each (In a Tube of 91)
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. 919-9373
Mfr. Part No.LTC1046IS8#PBF
$8.765
Each (In a Tube of 100)
units
Inverting 50µA - Surface Mount SOIC 8 - 5.004 x 3.988 x 1.752mm 1.752mm 5mm 6 V +85 °C - 1.5 V
RS Stock No. 162-8195
Mfr. Part No.LM2660MM/NOPB
$1.232
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. 121-8416
Mfr. Part No.TPS60400DBVT
$1.299
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. 545-6161
Mfr. Part No.LTC1144CS8#PBF
$9.79
Each
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. 155-7564
Mfr. Part No.LTC3203EDD-1#PBF
$4.944
Each (In a Tube of 121)
units
Step Up 500mA 1 MHz Surface Mount DFN 10 2.7 5.5 V 3 x 3 x 0.7mm 0.7mm 3mm 5.5 V +85 °C 4.5 V 2.7 V
RS Stock No. 146-1138
Mfr. Part No.ICL7660CPA+
$3.308
Each (In a Tube of 50)
units
Inverting, Step Up 225µA 10 kHz Through Hole PDIP 8 - 9.91 x 7.87 x 4.45mm 4.45mm 9.91mm 10 V +70 °C -1.5 V, 20 V 1.5 V
RS Stock No. 169-8195
Mfr. Part No.NJU7670V-TE1
$4.191
Each (On a Reel of 2000)
units
Step Up - - Surface Mount SSOP 14 - 5 x 4.4 x 1.15mm 1.15mm 5mm -2.6 V +75 °C - -6 V
RS Stock No. 156-5692
Mfr. Part No.LTC1983ES6-3#TRMPBF
$5.508
Each (On a Reel of 500)
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. 165-9118
Mfr. Part No.SI7661CSA+
$4.759
Each (In a Tube of 100)
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. 921-5585
Mfr. Part No.ICL7660SCBAZ
$2.952
Each (In a Pack of 5)
units
Inverting, Step Up - - Surface Mount SOIC 8 - 5 x 4 x 1.5mm 1.5mm 5mm 12 V +70 °C -1.5 V, 22.8 V 1.5 V
RS Stock No. 732-6839
Mfr. Part No.MAX680ESA+
$10.60
Each
units
Inverting, Step Up 10mA 8 kHz Surface Mount SOIC 8 1.5 → 1.6 V 5 x 4 x 1.5mm 1.5mm 5mm 6 V +85 °C - 2 V
RS Stock No. 422-554
Mfr. Part No.TPS60110PWP
$4.65
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. 779-8987
Mfr. Part No.LT1054IS8#PBF
$18.51
Each
units
Inverting 100mA 25 kHz Surface Mount SOIC 8 - - 1.498mm 5mm 15 V +100 °C - 3.5 V
RS Stock No. 403-727
Mfr. Part No.MCP1252-ADJI/MS
BrandMicrochip
$2.398
Each (In a Pack of 5)
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
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