TPS61281 Battery front-end DC/DC converter, Synchronous Boost-bypass. 1S Li-Ion,Ni-Rich,Si-Anode | TI.com

TPS61281 (ACTIVE)

Battery front-end DC/DC converter, Synchronous Boost-bypass. 1S Li-Ion,Ni-Rich,Si-Anode

 

Description

The TPS6128x device provides a power supply solution for products powered by either by a Li-Ion, Nickel-Rich, Silicon Anode, Li-Ion or LiFePO4 battery. The voltage range is optimized for single-cell portable applications like in smart-phones or tablet PCs.

Used as a high-power pre-regulator, the TPS6128x extends the battery run-time and overcomes input current- and voltage limitations of the powered system.

While in shutdown, the TPS6128x operates in a true pass-through mode with only 2µA quiescent consumption for longest battery shelf life.

During operation, when the battery is at a good state-of-charge, a low-ohmic, high-efficient integrated pass-through path connects the battery to the powered system.

If the battery gets to a lower state of charge and its voltage becomes lower than the desired minimum system voltage, the device seamlessly transits into boost mode to utilize the full battery capacity.

Features

  • 95% Efficiency at 2.3MHz Operation
  • 2µA Quiescent Current in Low IQ Pass-Through Mode
  • Wide VIN Range From 2.3V to 4.8V
  • IOUT ≥ 4A (Peak) at VOUT = 3.35V, VIN ≥ 2.65V
  • Integrated Pass-Through Mode (35mΩ)
  • Programmable Valley Inductor Current Limit and Output
    Voltage
  • Programmable Average Input Current Limit and Output
    Voltage
  • True Pass-Through Mode During Shutdown
  • Line and Load Transient
  • Low-Ripple Light-Load PFM Mode
  • In-Situ Customization with On-Chip E2PROM
    (Write Protect)
  • Two Interface Options:
    • I2C Compatible I/F up to 3.4Mbps (TPS61280)
    • Simple I/O Logic Control Interface (TPS6128x)
  • Thermal Shutdown and Overload Protection
  • Total Solution Size <20mm2, Sub 1-mm Profile

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Parametrics Compare all products in Boost converters (integrated switch)

 
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
TPS61281 TPS61280 TPS61282
2.3     2.3     2.3    
4.85     4.85     4.85    
2.85     2.85     2.85    
4.4     4.4     4.4    
3     5     4    
1     1     1    
2300     2300     2300    
2300     2300     2300    
0.015     0.015     0.015    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge    
Bypass Mode
I2C    
Adjustable Current Limit
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge    
90     90     90    
-40 to 85     -40 to 85     -40 to 85    
Converter     Converter     Converter    
Catalog     Catalog     Catalog    
DSBGA | 16     DSBGA | 16     DSBGA | 16