TPS61221 Tiny Low Input Voltage Boost Converter | TI.com

TPS61221 (ACTIVE)

Tiny Low Input Voltage Boost Converter

Tiny Low Input Voltage Boost Converter - TPS61221
 

Recommended alternative parts

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

Description

The TPS6122x family devices provide a power-supply solution for products powered by either a single-cell, two-cell, or three-cell alkaline, NiCd or NiMH, or one-cell Li-Ion or Li-polymer battery. Possible output currents depend on the input-to-output voltage ratio. The boost converter is based on a hysteretic controller topology using synchronous rectification to obtain maximum efficiency at minimal quiescent currents. The output voltage of the adjustable version can be programmed by an external resistor divider, or is set internally to a fixed output voltage. The converter can be switched off by a featured enable pin. While being switched off, battery drain is minimized. The device is offered in a 6-pin SC-70 package (DCK) measuring 2 mm × 2 mm to enable small circuit layout size.

Features

  • Up to 95% Efficiency at Typical Operating
    Conditions
  • 5.5 µA Quiescent Current
  • Startup Into Load at 0.7 V Input Voltage
  • Operating Input Voltage from 0.7 V to 5.5 V
  • Pass-Through Function during Shutdown
  • Minimum Switching Current 200 mA
  • Protections:
    • Output Overvoltage
    • Overtemperature
    • Input Undervoltage Lockout
  • Adjustable Output Voltage from 1.8 V to 6 V
  • Fixed Output Voltage Versions
  • Small 6-pin SC-70 Package

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Parametrics Compare all products in Boost converters (integrated switch)

 
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
TPS61221 TLV61220 TLV61224 TLV61225 TPS61097A-33 TPS61099 TPS61220 TPS61222 TPS61322
0.7     0.7     0.7     0.7     0.9     0.7     0.7     0.7     0.85    
5.5     5.5     3     3.3     5.5     5.5     5.5     5.5     5.5    
3.3     1.8     3     3.3     3.3     1.8     1.8     5     2.2    
3.3     5.5     3     3.3     3.3     5.5     5.5     5     2.2    
0.4     0.4     0.4     0.4     0.4     1     0.4     0.4     0.75    
1     1     1     1     1     1     1     1     1    
500     500     500     500         500     500     500    
2000     2000     2000     2000     2000       2000     2000     2000    
0.005     0.005     0.005     0.005     0.007     0.0008     0.005     0.005     0.006    
Synchronous Rectification     Synchronous Rectification     Synchronous Rectification     Synchronous Rectification     Bypass Mode     Synchronous Rectification     Synchronous Rectification     Synchronous Rectification     Light Load Efficiency
Synchronous Rectification    
90     90     90     90     100     90     90     90     90    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
Converter     Converter     Converter     Converter     Converter     Converter     Converter     Converter     Converter    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
SC70 | 6     SOT-23 | 6     SC70 | 6     SC70 | 6     SOT-23 | 5     DSBGA | 6     SC70 | 6     SC70 | 6     SOT-23 | 3