TPS61021 Datasheet, PDF (1/27 Pages) Texas Instruments – 3-A Boost Converter with 0.5-V Ultra Low Input Voltage

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TPS61021
SLVSD21B – NOVEMBER 2015 – REVISED MARCH 2016
TPS61021 3-A Boost Converter with 0.5-V Ultra Low Input Voltage
1 Features
•1 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 V_IN = 2.4 V, V_OUT = 3.3 V and
I_OUT = 1.5 A
• 2.0-MHz Switching Frequency
• I_OUT > 1.5 A at V_OUT = 3.3 V when V_IN > 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 x 2-mm WSON Package
2 Applications
• Battery Powered IoT Devices
• Gaming Control
• Thermostat
• Portable Medical Equipment
• Supercap Backup System
3 Description
The TPS61021 provides a power supply solution for
portable or smart devices powered by alkaline, NiMH,
Li-Mn, or Li-ion batteries. The TPS61021 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
TPS61021 to extend the battery run time.
The TPS61021 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 V_OUT in light load condition.
During shutdown, the load is completely disconnected
from the input. In addition, The TPS61021 provides
4.35-V output overvoltage protection, output short
circuit protection, and thermal shutdown protection.
The TPS61021 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 TPS61021 is available in 2.0-mm x 2.0-mm
WSON package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61021
WSON (8)
2.00-mm x 2.00-mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Circuit
VIN
L1
C1
ON
OFF
VIN
SW
VOUT
PGND
TPS61021
FB
EN
AGND
C3
R1
VOUT
C2
R2
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.