Boost Converters

Boost converters, also known as step-up converters, are DC-to-DC power conversion devices (a type of switch mode converter) used to increase voltage from its input supply to its output, while simultaneously stepping down the current. The power input can come from any suitable DC source, such as batteries, solar panels, rectifiers, and DC generators. Boost converters contain at least two semiconductors, such as diodes or transistors, and at least one energy storage element, such as a capacitor, an inductor, or it may contain both in combination.

RS Components offer a range of boost converters from a variety of brands, including Analog Devices, Maxim Integrated, Texas Instruments, and more.

How do boost converters work?

The boost converter is able to store energy in its inductor and then simultaneously release it at a higher load voltage than was inputted in the beginning making it very useful in speeding up devices. In order to conserve the power of the circuit (as P=VI), the output current is lower than the input current to account for the higher voltage.

Boost converters can primarily work in one of two modes: continuously or discontinuously. In the continuous mode, the current is never allowed to reach zero during the discharging process (when the transistor is turned off) and thus the inductor can consistently and efficiently produce the boosted voltage rate. In this mode, the timing of the transistor switching between ON/OFF is dimensioned in such a way that the inductor is always connected back to the input supply quickly, never allowing the inductor to be completely discharged.

Alternatively, running the boost converter in the discontinuous mode means there is a greater period of time between the ON state and OFF state of the transistor. During this time, the inductor may become fully discharged and remain inactive until the transistor is ON again, and this fluctuation may cause voltages to ripple.

Where are booster converters used?

  • LCD, OLED displays
  • Haptic displays
  • Portable devices like tablets, MP3 players, and mobile phones
  • Bar-code scanners

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Description Price Regulator Function Maximum Output Current Number of Outputs Line Regulation Load Regulation Mounting Type Package Type Pin Count Output Type Maximum Switching Frequency Switching Regulator Efficiency Dimensions Height
RS Stock No. 122-0170
Mfr. Part No.CS5171GDR8G
HK$9.215
Each (On a Reel of 2500)
units
Step Up 1.5A 1 0.03 %/V - Surface Mount SOIC 8 - 280 kHz Yes - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 786-2319
Mfr. Part No.CS5171GDR8G
HK$19.678
Each (In a Pack of 5)
units
Step Up 1.5A 1 0.03 %/V - Surface Mount SOIC 8 - 280 kHz Yes - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 163-0252
Mfr. Part No.NCV887001D1R2G
HK$5.717
Each (On a Reel of 2500)
units
Boost Controller 100µA 1 - - Surface Mount SOIC 8 Adjustable 110 kHz - - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 121-9830
Mfr. Part No.CS5173GDR8G
HK$9.215
Each (On a Reel of 2500)
units
Step Up 1.5A 1 0.03 %/V - Surface Mount SOIC 8 - 560 kHz Yes - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 161-2614
Mfr. Part No.NCP1422MNR2G
HK$5.072
Each (On a Reel of 3000)
units
Boost Converter 800mA 1 1 mV/V 1 mV/V Surface Mount DFN 10 Adjustable 1.2 MHz Yes 94% 3 x 3 x 1.95mm 1.95mm
RS Stock No. 161-2588
Mfr. Part No.NCP1027P065G
HK$11.319
Each (In a Tube of 50)
units
Boost Converter 800mA 1 - - Through Hole DIP 8 Adjustable 100 kHz Yes 82% 10.16 x 7.11 x 4.95mm 4.95mm
RS Stock No. 823-4135
Mfr. Part No.NCV887001D1R2G
HK$12.958
Each (In a Pack of 5)
units
Boost Controller 100µA 1 - - Surface Mount SOIC 8 Adjustable 110 kHz - - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 161-2659
Mfr. Part No.NCP1422MNR2G
HK$11.319
Each (In a Pack of 10)
units
Boost Converter 800mA 1 1 mV/V 1 mV/V Surface Mount DFN 10 Adjustable 1.2 MHz Yes 94% 3 x 3 x 1.95mm 1.95mm
RS Stock No. 161-2617
Mfr. Part No.NCP1421DMR2G
HK$7.071
Each (On a Reel of 4000)
units
Boost Converter 600mA 1 1 mV/V 1 mV/V Surface Mount Micro 8 Adjustable 1.2 MHz Yes 94% 3.1 x 3.1 x 0.95mm 0.95mm
RS Stock No. 163-2561
Mfr. Part No.NCP1403SNT1G
HK$2.772
Each (On a Reel of 3000)
units
Step Up 50mA 1 - - Surface Mount TSOP 5 - 300 kHz Yes - 3 x 1.5 x 1mm 1mm
RS Stock No. 786-2325
Mfr. Part No.CS5173GDR8G
HK$19.678
Each (In a Pack of 5)
units
Step Up 1.5A 1 0.03 %/V - Surface Mount SOIC 8 - 560 kHz Yes - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 823-4144
Mfr. Part No.NCV887100D1R2G
HK$23.184
Each (In a Pack of 5)
units
Boost Controller 100µA 1 - - Surface Mount SOIC 8 Adjustable 187 kHz - - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 464-182
Mfr. Part No.NCP1403SNT1G
HK$7.192
Each (In a Pack of 5)
units
Step Up 50mA 1 - - Surface Mount TSOP 5 - 300 kHz Yes 82% 3 x 1.5 x 1mm 1mm
RS Stock No. 121-7973
Mfr. Part No.NCV887100D1R2G
HK$9.435
Each (On a Reel of 2500)
units
Boost Controller 100µA 1 - - Surface Mount SOIC 8 Adjustable 187 kHz - - 5 x 4 x 1.5mm 1.5mm
RS Stock No. 161-2674
Mfr. Part No.NCP1421DMR2G
HK$12.072
Each (In a Pack of 10)
units
Boost Converter 600mA 1 1 mV/V 1 mV/V Surface Mount Micro 8 Adjustable 1.2 MHz Yes 94% 3.1 x 3.1 x 0.95mm 0.95mm