TPS61291 Low Iq Boost Converter with 15nA Bypass Operation | TI.com

TPS61291 (ACTIVE)

Low Iq Boost Converter with 15nA Bypass Operation

 

Recommended alternative parts

  • TPS610981  -  For applications requiring ultra-Low Iq or smaller package
  • TPS61220  -  For applications requiring ultra-Low Iq or smaller package

Description

The TPS61291 is a boost converter with pin selectable output voltages and an integrated bypass mode. In bypass operation, the device provides a direct path from the input to the system and allows a low power micro controller (MCU) such as the MSP430 to operate directly from a single 3V Li-MnO2 battery or dual alkaline battery cells.

In bypass mode the integrated feedback divider network for boost mode operation is disconnected from the output and the quiescent current consumption drops down to only 15nA (typical).

In boost mode the device provides a minimum output current of 200mA at 3.3V VOUT from 1.8V VIN. The boost mode is used for system components which require a regulated supply voltage and cannot directly operate from the input source. The boost converter is based on a current-mode controller using synchronous rectification to obtain maximum efficiency and consumes typically 5.7µA from the output. During startup of the boost converter, the VSEL pin is read out and the integrated feedback network sets the output voltage to 2.5V, 3V or 3.3V.

Bypass mode or boost mode operation is controlled by the system via the EN/BYP pin.

The device integrates an enhanced bypass mode control to prevent charge, stored in the output capacitor during boost mode operation, from flowing back to the input and charging the battery.

The device is packaged in a small 6-pin SON package (DRV) measuring 2.0mm × 2.0mm × 0.75mm.

Features

  • Input Voltage Range 0.9V to 5V
  • Startup Voltage 1.5V at 20mA Load
  • Pin Selectable Output Voltages:
    3.3V, 3V, 2.5V
  • 15nA typical Quiescent Current in
    Bypass Mode
  • 5.7µA typical Quiescent Current in
    Boost Mode
  • Bypass Switch from VIN to VOUT
  • IOUT > 200mA at 3.3V VOUT,
    VIN = 1.8V
  • Internal Feedback Divider Disconnect
    (Bypass Mode)
  • Controlled Bypass Transition Prevents
    Reverse Current into Battery
  • Power-Save Mode at Light Loads
  • Overtemperature Protection
  • Redundant Overvoltage Protection
  • Small 2mm × 2mm SON 6-pin package

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  Min   Max Range
Vin  V 0.9 to 5.0V
Vout  V 2.5 to 3.3V
Iout  A ≤ 1.3A
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
TPS61291 Order now 0.9     5     2.5     3.3     1     1     2300     2300     0.005     Bypass Mode     90     -40 to 85     Converter     Catalog     WSON | 6    
TPS61098 Order now 0.7     4.5     4.171     4.429     0.5     2     1000     3000     0.0003     Light Load Efficiency
Synchronous Rectification    
90     -40 to 85     Converter     Catalog     WSON | 6    
TPS610981 Order now 0.7     4.5     3.201     3.399     0.5     2     1000     3000     0.0003     Light Load Efficiency
Synchronous Rectification    
90     -40 to 85     Converter     Catalog     WSON | 6    
TPS610982 Order now 0.7     4.5     3.201     3.399     0.5     2     1000     3000     0.0003     Light Load Efficiency
Synchronous Rectification    
90     -40 to 85     Converter     Catalog     WSON | 6    
TPS610985 Order now 0.7     4.5     2.91     3.09     0.5     2     1000     3000     0.0003     Light Load Efficiency
Synchronous Rectification    
90     -40 to 85     Converter     Catalog     WSON | 6    
TPS610986 Order now 0.7     4.5     3.201     3.399     0.5     2     1000     3000     0.0003     Light Load Efficiency
Synchronous Rectification