TPS62746 Ultra-low-power DCDC converter with Vin-switch in WCSP | TI.com

TPS62746 (ACTIVE) Ultra-low-power DCDC converter with Vin-switch in WCSP

 

Recommended alternative parts

  • TPS62801  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

Description

The TPS62746 is a high efficiency step down converter with ultra low quiescent current of typical 360 nA. The device is optimized to operate with a 2.2-µH inductor and 10µF output capacitor. The device uses DCS-Control™ and operates with a typical switching frequency of 1.2 MHz. In Power Save Mode the device extends the light load efficiency down to a load current range of 10-µA and below. TPS62746 provides an output current of 300 mA. Once started the device operates down to an input voltage range of 2.0 V. This allows to operate the device directly from a single Li-MnO2 coin cell.

The TPS62746 provides two programmable output voltages of 1.2V and 1.8V selectable by one voltage select pin. The TPS62746 is optimized to provide a low output voltage ripple and low noise using a small output capacitor. Once the input voltage comes close to the output voltage the device enters the No Ripple 100% mode to prevent an increase of output ripple voltage. In this operation mode the device stops switching and turns the high side MOSFET switch on.

The TPS62746 has an integrated 1-mA switch that connects the supply voltage at pin VIN to the output VINSW. This low current switch can be used to disconnect a resistor divider from the input supply typically being used to measure the input voltage with an ADC.

Features

  • Input Voltage Range VIN from 2.15 V to 5.5 V
  • Input Voltage Range Down to 2.0 V Once Started
  • 300 mA Output Current
  • 360 nA Operational Quiescent Current
  • Up to 90% Efficiency at 10-µA Output Current
  • Power Save Mode Operation
  • Selectable Output Voltages
    • 1.2 V and 1.8 V
  • Output Voltage Discharge
  • 1 mA /150 Ω Integrated Input Voltage Switch
  • Low Output Voltage Ripple
  • Automatic Transition to No Ripple 100% Mode
  • RF Friendly DCS-Control™
  • Total Solution Size <10mm2
  • Small 1.6 mm × 0.9 mm, 8 Ball WCSP Package

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WEBENCH® Designer TPS62746

  Min   Max Range
Vin  V 2.15 to 5.5V
Vout  V 1.2 to 1.8V
Iout  A ≤ 0.3A
Ambient Temp  °C -40 to 125°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)
TPS62746 Order now 2     5.5     1.2     3.3     0.3     1     1200     1200     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     DSBGA | 8     Converter     See datasheet (DSBGA)    
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     12WSON: 6 mm2: 3 x 2 (WSON | 12)    
TPS62743 Order now 2     5.5     1.2     3.3     0.3     1     1200     1200     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     DSBGA | 8     Converter     See datasheet (DSBGA)    
TPS62745 Order now 3.3     10     1.8     3.3     0.3     1     2500     2500     0.0004     Adaptive/Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Power Good
Soft Start Fixed
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 125     Catalog     WSON | 12     Converter     12WSON: 6 mm2: 3 x 2 (WSON | 12)    
TPS62748 Order now 2.15     5.5     1.2     1.8     0.3     1     1200     1200     0.00036     Adaptive/Dynamic Voltage Scaling
Enable
Light Load Efficiency
Output Discharge
Synchronous Rectification    
Constant on-time (COT)
DCS-Control    
100     -40 to 125     Catalog     DSBGA | 8