TPS62740 (ACTIVE)

Ultra-low-power 300mA Step-Down Buck DCDC Converter with 360nA Iq

 

Recommended alternative parts

  • TPS62730  -  Looking for even lower Iq in by-pass mode? Try the TPS62730
  • TPS62745  -  Looking for wider Vin range? Try the TPS62745
  • TPS82740A  -  Looking for this device in ultra-small package? Try the TPS82740A
  • TPS62742  -  Looking for more current? Try the TPS62742
  • TPS62743  -  Looking for a smaller package? Try the TPS62743

Description

The TPS6274x is industry’s first step down converter featuring typ. 360nA quiescent current and operating with a tiny 2.2µH inductor and 10µF output capacitor. This new DCS-Control™ based device extends the light load efficiency range below 10µA load currents. TPS62740 supports output currents up to 300mA, TPS62742 up to 400mA. The device operates from rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-MnO2 and two or three cell alkaline batteries. The input voltage range up to 5.5V allows also operation from a USB port and thin-film solar modules. The output voltage is user selectable by four VSEL pins within a range from 1.8V to 3.3V in 100mV steps. TPS6274x features low output ripple voltage and low noise with a small output capacitor. Once the battery voltage comes close to the output voltage (close to 100% duty cycle) the device enters no ripple 100% mode operation to prevent an increase of output ripple voltage. The device then stops switching and the output is connected to the input voltage. The integrated slew rate controlled load switch provides typ. 0.6Ω on-resistance and can distribute the selected output voltage to a temporarily used sub-system. The TPS6274x is available in a small 12 pin 2 × 3mm2 WSON package and supports a total solutions size of 31mm2.

Features

  • Input Voltage Range VIN from 2.2V to 5.5
  • Typ. 360nA Quiescent Current
  • Up to 90% Efficiency at 10µA Output Current
  • Up to 300mA / 400mA Output Current (TPS62740/TPS62742)
  • RF Friendly DCS-Control™
  • Up to 2 MHz Switching Frequency
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages in 100mV Steps between
    1.8V to 3.3V
  • Automatic Transition to No Ripple 100% Mode
  • Slew Rate Controlled Load Switch
  • Discharge Function on VOUT / LOAD
  • Power Good Output
  • Optimized for Operation with a Tiny 2.2µH Inductor
    and 10µF COUT
  • Total Solution Size <31mm2
  • Small 2 × 3 mm2 WSON Package

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Parametrics Compare all products in Buck Converter (Integrated Switch)

 
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Regulated Outputs (#)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Control Mode
Duty Cycle (Max) (%)
Operating Temperature Range (C)
Rating
Package Group
TPS62740 TPS62730 TPS62732 TPS62733 TPS62742 TPS62743 TPS62745 TPS62746 TPS62748
2.2    1.9    1.9    1.9    3    2    3.3    2    2.15   
5.5    3.9    3.9    3.9    5.5    5.5    10    5.5    5.5   
1.8    2.1    1.9    2.3    1.8    1.2    1.8    1.2    1.2   
3.3    2.1    1.9    2.3    3.3    3.3    3.3    3.3    1.8   
0.3    0.1    0.1    0.1    0.4    0.3    0.3    0.3    0.3   
1    1    1    1    1    1    1    1    1   
2000    3000    3000    3000    2000    1200    2500    1200    1200   
2000    3000    3000    3000    2000    1200    2500    1200    1200   
0.0003    0.025    0.025    0.025    0.0003    0.0003    0.0004    0.0003    0.00036   
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Enable
Light Load Efficiency
Synchronous Rectification   
Dynamic Voltage Scaling
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification   
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification   
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification   
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification   
Load Disconnect   
Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)    Constant on-time (COT)   
100    100    100    100    100    100    100    100    100   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 125    -40 to 85    -40 to 125   
Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog    Catalog   
WSON    SON    SON    SON    WSON    DSBGA    WSON    DSBGA    DSBGA   
New! Interactive Design
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WEBENCH® Designer TPS62740

  Min   Max Range
Vin  V 2.2 to 5.5V
Vout  V 1.8 to 3.3V
Iout  A ≤ 0.3A
Ambient Temp  °C -40 to 85°C


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