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. 165-4043
Mfr. Part No.MCP1661T-E/OT
BrandMicrochip
MYR3.585
Each (On a Reel of 3000)
units
Step Up 200mA 1 0.5 %/V 1.5 % Surface Mount SOT-23 5 Adjustable 575 kHz Yes 92% 3.1 x 1.8 x 1.3mm 1.3mm
RS Stock No. 841-7535
Mfr. Part No.MCP1661T-E/OT
BrandMicrochip
MYR4.295
Each (In a Pack of 10)
units
Step Up 200mA 1 0.5 %/V 1.5 % Surface Mount SOT-23 5 Adjustable 575 kHz Yes - 3.1 x 1.8 x 1.3mm 1.3mm
RS Stock No. 162-4707
Mfr. Part No.LM2750LD-5.0/NOPB
MYR4.39
Each (On a Reel of 1000)
units
- - - - - - - - - - - - - -
RS Stock No. 533-5452
Mfr. Part No.LM2750LD-5.0/NOPB
MYR7.89
Each
units
Step Up 120mA 1 - - Surface Mount LLP 10 Fixed 1700 kHz Yes 87% 3 x 3 x 0.8mm 0.8mm
RS Stock No. 533-8120
Mfr. Part No.LM2577T-ADJ/NOPB
MYR37.17
Each
units
Step Up 3A 1 50 mV 50 mV Through Hole TO-220 5 Adjustable 56 kHz Yes 80% 10.16 x 4.7 x 8.89mm 8.89mm
RS Stock No. 920-3611
Mfr. Part No.LM2621MM/NOPB
MYR5.895
Each (On a Reel of 1000)
units
Step Up 1A 1 - - Surface Mount MSOP 8 Adjustable 2000 kHz Yes - 3 x 3 x 0.86mm 0.86mm
RS Stock No. 100-3984
Mfr. Part No.LM2577T-ADJ/NOPB
MYR28.754
Each (In a Tube of 45)
units
Step Up 3A 1 50 mV 50 mV Through Hole TO-220 5 Adjustable 56 kHz Yes - 10.16 x 4.7 x 8.89mm 8.89mm
RS Stock No. 533-3872
Mfr. Part No.LM2621MM/NOPB
MYR9.72
Each
units
Step Up 1A 1 - - Surface Mount MSOP 8 Adjustable 2000 kHz Yes 87% 3 x 3 x 0.86mm 0.86mm
RS Stock No. 817-5880
Mfr. Part No.BQ25504RGTT
MYR20.81
Each
units
Boost Converter - 3 ±10 % - Surface Mount QFN 16 - 1 MHz Yes - 3.15 x 3.15 x 0.95mm 0.95mm
RS Stock No. 162-4198
Mfr. Part No.LM2735XMF/NOPB
MYR8.783
Each (On a Reel of 1000)
units
Step Up 3A 1 - - Surface Mount SOT-23 5 Adjustable 1600 kHz Yes - 2.92 x 1.6 x 1.02mm 1.02mm
RS Stock No. 162-8102
Mfr. Part No.BQ25504RGTT
MYR14.938
Each (On a Reel of 250)
units
Boost Converter - 3 ±10 % - Surface Mount QFN 16 - 1 MHz Yes - 3.15 x 3.15 x 0.95mm 0.95mm
RS Stock No. 923-6756
Mfr. Part No.TPS61175PWP
MYR12.758
Each (In a Tube of 90)
units
Step Up 3A 1 - - Surface Mount HTSSOP 14 Adjustable 2200 kHz Yes - 5 x 4.4 x 1.15mm 1.15mm
RS Stock No. 162-4681
Mfr. Part No.LM2585T-5.0/NOPB
MYR24.289
Each (In a Tube of 45)
units
Step Up 3A 1 50 mV 50 mV Through Hole TO-220 5 Fixed 115 kHz Yes 80% 10.16 x 4.57 x 8.64mm 8.64mm
RS Stock No. 822-6534
Mfr. Part No.LTC3786EMSE#PBF
MYR25.70
Each
units
Boost 85µA 1 - 2 % Surface Mount MSOP 16 Adjustable 585 kHz Yes - 4.039 x 3 x 0.86mm 0.86mm
RS Stock No. 145-6225
Mfr. Part No.LMR62014XMFE/NOPB
MYR2.531
Each (On a Reel of 250)
units
Step Up 2A 1 0.02 %/V - Surface Mount SOT-23 5 Adjustable 1.85 MHz Yes - 3.05 x 1.75 x 1.3mm 1.3mm
RS Stock No. 811-5854
Mfr. Part No.LMR62014XMFE/NOPB
MYR3.948
Each (In a Pack of 10)
units
Step Up 2A 1 0.02 %/V - Surface Mount SOT-23 5 Adjustable 1.85 MHz Yes - 3.05 x 1.75 x 1.3mm 1.3mm
RS Stock No. 407-183
Mfr. Part No.LM2735XMF/NOPB
MYR9.85
Each (In a Pack of 5)
units
Step Up 3A 1 - - Surface Mount SOT-23 5 Adjustable 1600 kHz Yes 90% 2.92 x 1.6 x 1.02mm 1.02mm
RS Stock No. 533-3305
Mfr. Part No.LM2585T-5.0/NOPB
MYR34.55
Each
units
Step Up 3A 1 50 mV 50 mV Through Hole TO-220 5 Fixed 115 kHz Yes 80% 10.16 x 4.57 x 8.64mm 8.64mm
RS Stock No. 709-2435
Mfr. Part No.TPS61175PWP
MYR14.10
Each
units
Step Up 3A 1 - - Surface Mount HTSSOP 14 Adjustable 2200 kHz Yes 93% 5 x 4.4 x 1.15mm 1.15mm
RS Stock No. 545-6284
Mfr. Part No.LT1301CN8#PBF
MYR27.74
Each
units
Step Up 120mA 1 0.15 %/V - Through Hole PDIP 8 Fixed 185 kHz Yes 89% 10.16 x 6.48 x 3.3mm 3.3mm