TPS62745 デュアル・セル、超低 Iq 降圧コンバータ、超低消費電力ワイヤレス・アプリケーション用 | TIJ.co.jp

TPS62745 (供給中) デュアル・セル、超低 Iq 降圧コンバータ、超低消費電力ワイヤレス・アプリケーション用

 

推奨代替製品

  • TPS62120  -  15V, 75mA, 96% efficiency step-down converter with DCS-control
  • TPS62125  -  3V-17V, 300mA buck converter with adjustable enable threshold and hysteresis
  • TPS62175  -  28V, 0.5A step-down converter with SNOOZE mode

概要

The TPS62745 is a high efficiency ultra low power synchronous step down converter optimized for low power wireless applications. It provides a regulated output voltage consuming only 400-nA quiescent current. The device operates from two rechargeable Li-Ion batteries, Li-primary battery chemistries such as Li-SOCl2, Li-SO2, Li-MnO2 or four to six cell alkaline batteries. The input voltage range up to 10 V allows also operation from a USB port and thin-film solar modules. The output voltage is set with four VSEL pins between 1.8 V and 3.3 V for TPS62745 or 1.3 V and 2.8 V for TPS627451. TPS62745 features low output ripple voltage and low noise with a small output capacitor. An internal input voltage switch controlled by pin EN_VIN_SW connects the supply voltage to pin VIN_SW. The switch is intended to be used for an external voltage divider, scaling down the input voltage for an external ADC. The switch is automatically opened when the supply voltage is below the undervoltage lockout threshold. The TPS62745 is available in a small 12 pin 3 mm × 2 mm WSON package.

特長

  • Input Voltage Range VIN from 3.3 V to 10 V
  • Typical 400 nA Quiescent Current
  • Up to 90% efficiency with load currents >15 µA
  • Up to 300 mA Output Current
  • RF Friendly DCS-Control™
  • Low Output Ripple Voltage
  • 16 Selectable Output Voltages from
    • 1.8 V to 3.3 V (TPS62745)
    • 1.3 V to 2.8 V (TPS627451)
  • Integrated input voltage switch
  • Integrated Discharge Function at VOUT
  • Open Drain Power Good Output
  • Operates with a Tiny 3.3 µH or 4.7 µH Inductor
  • Small 3 mm × 2 mm WSON Package

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WEBENCH® Designer TPS62745

  最小   最大 範囲
入力電圧  V 3.3 to 10.0V
出力電圧  V 1.8 to 3.3V
負荷電流  A ≤ 0.3A
周囲温度  °C -40 to 85°C

機能一覧

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Part number オーダー・オプション 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)
TPS62745 ご注文 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)    
TPS62740 ご注文 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 ご注文 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)    
TPS62746 ご注文 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)    
TPS62748 ご注文 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