28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications - TPS61041

TPS61041 (ACTIVE)

28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications

Description

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.

Features

  • 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
  • APPLICATIONS
    • LCD Bias Supply
    • White-LED Supply for LCD Backlights
    • Digital Still Camera
    • PDAs, Organizers, and Handheld PCs
    • Cellular Phones
    • Internet Audio Players
    • Standard 3.3-V or 5-V to 12-V Conversion

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Parametrics Compare all products in Step-Up (Boost) Converter

 
Regulated Outputs (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Topology
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Duty Cycle (Max) (%)
Undervoltage Lockout
Switch Current Limit (Typ) (A)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS61041 TPS61040 TPS61045 TPS61046
      1    
1.8     1.8     1.8     1.8    
6     6     6     5.5    
1.8     1.8     1.8     4.5    
28     28     28     28    
Boost     Boost     Boost     Boost    
1000     1000     1000     1250    
0.028     0.028     0.04     0.11    
88     88     88      
1.5     1.5       1.75    
0.25     0.4       0.9    
Enable     Enable     Enable
Load Disconnect    
Enable
Light Load Efficiency
Load Disconnect    
Catalog     Catalog     Catalog     Catalog    
-40 to 85     -40 to 85     -40 to 85     -40 to 85    
5SOT-23
6SON    
5SOT
5SOT-23
6SON    
8SON     6DSBGA    
0.60 | 1ku     0.60 | 1ku     0.65 | 1ku     0.70 | 1ku    

Other qualified versions of TPS61041

Version Part Number Definition
Automotive TPS61041-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
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WEBENCH® TPS61041
    Min   Max   Range  
  Vin V 1.8 to 6.0V  
  Vout V 1.8 to 28.0V  
  Iout A ≤ 0.25A  
  Ambient Temp °C -40 to 85°C  
Footprint BOM Cost Efficiency
 
   
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