TPS61254 (ACTIVE)

Tiny Boost Converter with Input Current Limit and Bypas. 4.5 V Output Voltage

 

Description

The TPS6125x device provides a power supply solution for battery-powered portable applications. Intended for low-power applications, the TPS6125x supports up to 800-mA load current from a battery discharged as low as 2.65V and allows the use of low cost chip inductor and capacitors.

With a wide input voltage range of 2.3 V to 5.5 V, the device supports applications powered by Li-Ion batteries with extended voltage range. Different fixed voltage output versions are available from 3.15 V to 5.0 V.

The TPS6125x operates at a regulated 3.5-MHz switching frequency and enters power-save mode operation at light load currents to maintain high efficiency over the entire load current range. The PFM mode extends the battery life by reducing the quiescent current to 37 µA (typ) during light load operation.

In addition, the TPS6125x device can also maintain its output biased at the input voltage level. In this mode, the synchronous rectifier is current limited allowing external load (e.g. audio amplifier) to be powered with a restricted supply. In this mode, the quiescent current is reduced to 21 µA. During shutdown, the load is completely disconnected from the battery. Input current in shutdown mode is less than 1 µA (typ), which maximizes battery life.

The TPS6125x offers a very small solution size due to minimum amount of external components. It allows the use of small inductors and input capacitors to achieve a small solution size.

Features

  • 93% Efficiency at 3.5-MHz Operation
  • 21-µA Quiescent Current in Standby Mode
  • 37-µA Quiescent Current in Normal Operation
  • Wide VIN Range From 2.3 V to 5.5 V
  • VIN ≥ VOUT Operation
  • IOUT ≥ 800 mA at VOUT= 4.5 V, VIN ≥ 2.65 V
  • IOUT ≥ 1000 mA at VOUT = 5.0 V, VIN ≥ 3.3 V
  • IOUT ≥ 1500 mA (Peak) at VOUT = 5.0 V, VIN ≥ 3.3 V
  • ±2% Total DC Voltage Accuracy
  • Light-Load PFM Mode
  • Selectable Standby Mode or True Load
    Disconnect During Shutdown
  • Thermal Shutdown and Overload Protection
  • Only Three Surface-Mount External Components
    Required
  • Total Solution Size < 25 mm2
  • 9-Pin NanoFree™ (CSP) Packaging

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Parametrics Compare all products in Boost Converter (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)
Rating
Package Group
TPS61254 TPS61253 TPS61253A TPS61256 TPS61256C TPS61258 TPS61259 TPS612592
2.5    2.65    2.3    2.5    2.5    2.65       
4.35    4.85    5.5    4.85    4.85    4.85       
4.5    5    5    5    5    4.5    5.1    5.2   
4.5    5    5    5    5    4.5    5.1    5.2   
2.15    3.6    4    2.15    2.15    3.6    3.6    3.6   
1    1    1    1    1    1    1    1   
3500    3500    3500    3500    3500    3500       
3500    3500    3500    3500    3500    3500       
0.023    0.02    0.05    0.02    0.02    0.02    0.02    0.02   
Enable
Light Load Efficiency
Load Disconnect   
Enable
Light Load Efficiency
Load Disconnect   
Enable
Light Load Efficiency
Load Disconnect
Synchronous Rectification   
Enable
Light Load Efficiency
Load Disconnect   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Light Load Efficiency
Load Disconnect   
Enable
Light Load Efficiency
Load Disconnect   
Enable
Light Load Efficiency
Load Disconnect   
100    100    100    100      100    90    90   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
DSBGA    DSBGA    DSBGA    DSBGA    DSBGA    DSBGA    DSBGA    DSBGA   
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WEBENCH® Designer TPS61254

  Min   Max Range
Vin  V 2.5 to 4.35V
Vout  V 4.5 to 4.5V
Iout  A ≤ 1.9A
Ambient Temp  °C -40 to 85°C


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