TPS61021A 3-A Boost Converter with 0.5-V Ultra Low Input Voltage | TI.com

TPS61021A
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3-A Boost Converter with 0.5-V Ultra Low Input Voltage

 

Description

The TPS61021A provides a power supply solution for portable or smart devices powered by alkaline, NiMH, Li-Mn, or Li-ion batteries. The TPS61021A is capable of outputting 3.3-V voltage and 1.5-A current from a battery discharged to as low as 1.8 V. Capable of operating with 0.5-V input voltage enables the TPS61021A to extend the battery run time.

The TPS61021A operates at 2-MHz switching frequency at heavy load and enters power-save mode at light load to maintain high efficiency over the entire load current range. The device only consumes a 17-µA quiescent current from VOUT in light load condition. During shutdown, the load is completely disconnected from the input. In addition, The TPS61021A provides 4.35-V output overvoltage protection, output short circuit protection, and thermal shutdown protection.

The TPS61021A offers a very small solution size due to low count of external components. It allows the use of small inductors and output capacitors with the 2-MHz switching frequency.

The TPS61021A is available in 2.0-mm × 2.0-mm WSON package.

Features

  • Input Voltage Range: 0.5 V to 4.4 V
  • 0.9 V Minimum Input Voltage for Startup
  • Output Voltage Setting Range: 1.8 V to 4.0 V
  • 91% Efficiency at VIN = 2.4 V, VOUT = 3.3 V and
    IOUT = 1.5 A
  • 2.0-MHz Switching Frequency
  • IOUT > 1.5 A at VOUT = 3.3 V when VIN > 1.8 V
  • 17-µA Typical Quiescent Current
  • ±2.5% Reference Voltage Accuracy over –40°C to
    125°C
  • PFM Operation Mode at Light Load
  • True Disconnection Between Input and Output
    During Shutdown
  • Output Over Voltage Protection
  • Output Short Circuit Protection
  • Thermal Shutdown Protection
  • 2-mm × 2-mm WSON Package

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WEBENCH® Designer TPS61021A

  Min   Max Range
Vin  V 0.5 to 3.6V
Vout  V 1.8 to 4V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C

Parametrics

Compare all products in Boost converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Switch current limit (Typ) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Type Rating Package Group
TPS61021A Order now 0.5     4.4     1.8     4     4.3     1     50     2000     0.017     Enable
Light Load Efficiency
Load Disconnect
Synchronous Rectification    
90     -40 to 125     Converter     Catalog     WSON | 8    
TLV61048 Order now 2.65     5.5     3.3     14     3.7     1     430     1250     0.1     Enable
Light Load Efficiency
Pre-Bias Start-Up    
  -40 to 125     Converter     Catalog     SOT-23 | 6    
TPS61022 Order now 0.5     5.5     2.2     5.5     8     1     600     1000     0.027     Enable
Light Load Efficiency
Load Disconnect
Pre-Bias Start-Up
Synchronous Rectification
UVLO Fixed    
97     -40 to 125     Converter     Catalog     VQFN-HR | 7    
TPS61023 Order now                       -40 to 125       Catalog     SOT-5X3 | 6    
TPS61030 Order now 1.8     5.5     1.8     5.5     4     1     500     700     0.02     Synchronous Rectification     100     -40 to 85     Converter     Catalog     HTSSOP | 16
QFN | 16    
TPS61200 Order now 0.3     5.5     1.8     5.5     1.35     1     1250     1650     0.05     Synchronous Rectification     95     -40 to 85     Converter     Catalog     VSON | 10    
TPS61201 Order now 0.3