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PDF TPS61021 Data sheet ( Hoja de datos )
| Número de pieza | TPS61021 | |
| Descripción | Low Input Voltage (Rev. B) | |
| Fabricantes | Texas | |
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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 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 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 VOUT 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
OFF
ON
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.
1 page  
www.ti.com
TPS61021
SLVSD21B – NOVEMBER 2015 – REVISED MARCH 2016
Electrical Characteristics (continued)
TJ = –40°C to 125°C, VIN = 2.4 V and VOUT = 3.3 V. Typical values are at TJ = 25°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
VREF
Reference voltage at the FB pin
PWM mode
PFM mode
775 795 815
801
VOVP
Output over-voltage protection
threshold
VOUT rising
4.15 4.35 4.60
VOVP_HYS
IFB_LKG
ISW_LKG
IVOUT_LKG
Over-voltage protection hysteresis
Leakage current at FB pin
Leakage current into SW pin
Leakage current into VOUT pin
IC disabled, TJ up to 85°C
IC disabled, VOUT = 4.0 V, TJ up to
85°C
0.1
20
3.0
12
POWER SWITCH
RDS(on)
fSW
High-side MOSFET on resistance
Low-side MOSFET on resistance
Switching frequency
VOUT = 3.3 V
VOUT = 3.3 V
VIN = 2.4 V, VOUT = 3.3 V, PWM
mode
51
58
2.0
tOFF_min
Minimum off time
ILIM_SW
Valley current limit
LOGIC INTERFACE
VIN = 2.4 V, VOUT = 3.3 V
80 120
3.0 4.3
VEN_H
EN Logic high threshold
VEN_L
EN Logic Low threshold
PROTECTION
VIN > 1.2 V
VIN ≤ 1.2 V
VIN > 1.2 V
VIN ≤ 1.2 V
0.36
0.3 x VIN
0.84
0.7 x VIN
TSD
TSD_HYS
Thermal shutdown threshold
Thermal shutdown hysteresis
TJ rising
TJ falling below TSD
150
20
UNIT
mV
mV
V
V
nA
µA
µA
mΩ
mΩ
MHZ
ns
A
V
V
°C
°C
6.6 Typical Characteristics
VIN = 2.4 V, VOUT = 3.3 V, TJ = 25°C, unless otherwise noted
100
90
80
70
60
50
40
30 Vin = 0.9 V
Vin = 1.2 V
20 Vin = 1.8 V
10 Vin = 2.4 V
Vin = 3.0 V
0
0.0001
0.001
0.01
0.1
1
10
Output Current (A)
D001
VIN = 0.9 V, 1.2 V, 1.8 V, 2.4 V, 3.0 V, and VOUT = 3.3 V
100
90
80
70
60
50
40
30
20
10
0
0.0001
0.001
0.01
0.1
Output Current (A)
VIN = 2.4 V, and VOUT = 2.5 V, 3.3 V, 4.0 V
Vout = 2.5 V
Vout = 3.3 V
Vout = 4.0 V
1 10
D001
Figure 1. Load Efficiency with Different Input
Figure 2. Load Efficiency with Different Output
Copyright © 2015–2016, Texas Instruments Incorporated
Product Folder Links: TPS61021
Submit Documentation Feedback
5
5 Page 
www.ti.com
Device Functional Modes (continued)
Output
Voltage
PFM mode at light load
TPS61021
SLVSD21B – NOVEMBER 2015 – REVISED MARCH 2016
1.008 x VOUT_NOM
VOUT_NOM
PWM mode at heavy load
Figure 10. Output Voltage in PWM Mode and PFM Mode
Copyright © 2015–2016, Texas Instruments Incorporated
Product Folder Links: TPS61021
Submit Documentation Feedback
11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet TPS61021.PDF ] | |
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