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

 

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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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

Parametrics

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Part number Order 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 Type Package size: mm2:W x L (PKG)
TPS62740 Order now 2.2     5.5     1.8     3.3     0.3     1     2000     2000     0.0003     Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification
Adaptive/Dynamic Voltage Scaling    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     WSON | 12     Converter     See datasheet (WSON)    
TPS62125 Order now 3     17     1.2     10     0.3     1     1000     1000     0.013     Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification
UVLO Adjustable    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     WSON | 8     Converter     See datasheet (WSON)    
TPS62175 Order now 4.7     28     1     6     0.5     1     1000     1000     0.0048     Enable
Light Load Efficiency
Output Discharge
Power Good
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 85     Catalog     WSON | 10     Converter     See datasheet (WSON)    
TPS62230 Order now 2.05     6     2.5     2.5     0.5     1     2500     3500     0.022     Enable
Forced PWM
Light Load Efficiency
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 125     Catalog     SON | 6     Converter     See datasheet (SON)    
TPS62671 Order now 2.3     4.8     1.8     1.8     0.5     1     5400     6600     0.017     Enable
Forced PWM
Light Load Efficiency
Spread Spectrum
Synchronous Rectification    
Voltage Mode     100