TPS62740 Ultra-low-power 300mA Step-Down Buck DCDC Converter with 360nA Iq | TI.com

TPS62740 (ACTIVE)

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

Ultra-low-power 300mA Step-Down Buck DCDC Converter with 360nA Iq - TPS62740
 

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 a module?
  • 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 TPS62125 TPS62175 TPS62230 TPS62671 TPS62742 TPS62745 TPS62746 TPS62748 TPS62821
2.2     3     4.7     2.05     2.3     3     3.3     2     2.15     2.4    
5.5     17     28     6     4.8     5.5     10     5.5     5.5     5.5    
1.8     1.2     1     2.5     1.8     1.8     1.8     1.2     1.2     0.6    
3.3     10     6     2.5     1.8     3.3     3.3     3.3     1.8     4    
0.3     0.3     0.5     0.5     0.5     0.4     0.3     0.3     0.3     1    
1     1     1     1     1     1     1     1     1     1    
2000     1000     1000     2000     5400     2000     2500     1200     1200     2200    
2000     1000     1000     3000     6600     2000     2500     1200     1200     2200    
0.0003     0.013     0.0048     0.022     0.017     0.0003     0.0004     0.0003     0.00036     0.004    
Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification
UVLO Adjustable    
Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Synchronous Rectification    
Enable
Forced Pulse Width Modulation (FPWM) Mode
Light Load Efficiency
Spread Spectrum
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    
Load Disconnect     Enable
Light Load Efficiency
Output Discharge
Over Current Protection
Power Good
Pre-Bias Start-Up
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Voltage Mode     Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
Constant on-time (COT)
DCS-Control    
100     100     100     100     100     100     100     100     100     100    
-40 to 85     -40 to 85     -40 to 85     -40 to 125     -40 to 85     -40 to 85     -40 to 125     -40 to 85     -40 to 125     -40 to 125    
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