TPS61040 28-V, 400-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications |

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28-V, 400-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications


Recommended alternative parts

  • TPS61046  -  For applications requiring smaller package or True Disconnection


The TPS6104x is a high-frequency boost converter dedicated for small to medium LCD bias supply and white LED backlight supplies. The device is ideal to generate output voltages up to 28 V from a dual-cell NiMH/NiCd or a single-cell Li-Ion battery. The part can also be used to generate standard 3.3-V or 5-V to 12-V power conversions.

The TPS6104x operates with a switching frequency up to 1 MHz. This frequency allows the use of small external components using ceramic as well as tantalum output capacitors. Together with the thin WSON package, the TPS6104x gives a very small overall solution size. The TPS61040 device has an internal 400-mA switch current limit, while the TPS61041 device has a 250-mA switch current limit, offering lower output voltage ripple and allows the use of a smaller form factor inductor for lower power applications. The low quiescent current (typically 28 µA) together with an optimized control scheme, allows device operation at very high efficiencies over the entire load current range.


  • 1.8-V to 6-V Input Voltage Range
  • Adjustable Output Voltage Range up to 28 V
  • 400-mA (TPS61040) and 250-mA (TPS61041) Internal Switch Current
  • Up to 1-MHz Switching Frequency
  • 28-µA Typical No-Load Quiescent Current
  • 1-µA Typical Shutdown Current
  • Internal Soft Start
  • Available in SOT23-5, TSOT23-5,
    and 2-mm × 2-mm × 0.8-mm WSON Packages

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WEBENCH® Designer TPS61040

  Min   Max Range
Vin  V 1.8 to 6.0V
Vout  V 1.8 to 28V
Iout  A ≤ 0.4A
Ambient Temp  °C -40 to 85°C


Compare all products in Boost converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switch current limit (Typ) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Type Rating Package Group
TPS61040 Order now 1.8     6     1.8     28     0.4     1     50     1000     0.028     Enable     88     -40 to 85     Converter     Catalog     SOT-23-THIN | 5
SOT-23 | 5
WSON | 6    
LM2621 Order now 1.2     14     1.24     14     2.85     1     2000     2000     0.08     Enable     80     -40 to 85     Converter     Catalog     VSSOP | 8    
LM2623 Order now 0.8     14     1.24     14     2.85     1     300     2000     0.08     Enable     90     -40 to 85     Converter     Catalog     VSSOP | 8
WSON | 14    
LM2731 Order now 2.7     14     1.23     22     1.5     1     600     1600     2     Enable     93     -40 to 125     Converter     Catalog     SOT-23 | 5    
LM27313 Order now 2.7     14     4     28     1.25     1     1150     1900     2.1     Enable
Light Load Efficiency    
88     -40 to 125     Converter     Catalog     SOT-23 | 5    
LM2733 Order now 2.7     14     3     40     1.5     1