TPS63020_15 Datasheet, PDF (1/29 Pages) Texas Instruments – TPS6302x High Efficiency Single Inductor Buck-Boost Converter With 4-A Switches

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TPS63020, TPS63021
SLVS916D – JULY 2010 – REVISED OCTOBER 2015
TPS6302x High Efficiency Single Inductor Buck-Boost Converter With 4-A Switches
1 Features
•1 Input Voltage Range: 1.8 V to 5.5 V
• Fixed and Adjustable Output Voltage Options from
1.2 V to 5.5 V
• Up to 96% Efficiency
• 3-A Output Current at 3.3 V in Step Down Mode
(V_IN = 3.6 V to 5.5 V)
• More than 2-A Output Current at 3.3 V in Boost
Mode (V_IN > 2.5 V)
• Automatic Transition Between Step Down and
Boost Mode
• Dynamic Input Current Limit
• Device Quiescent Current less than 50 μA
• Power Save Mode for Improved Efficiency at Low
Output Power
• Forced Fixed Frequency Operation at 2.4 MHz
and Synchronization Possible
• Smart Power Good Output
• Load Disconnect During Shutdown
• Overtemperature Protection
• Overvoltage Protection
• Available in a 3mm × 4mm 14-Pin VSON Package
(DSJ)
2 Applications
• All Two-Cell and Three-Cell Alkaline, NiCd or
NiMH or Single-Cell Li Battery Powered Products
• Ultra Mobile PCs and Mobile Internet Devices
• Digital Media Players
• Digital Still Cameras (DSC) and Camcorders
• Mobile Phones and Smart Phones
• Personal Medical Products
• Industrial Metering Equipment
• High Power LEDs
SPACE
3 Description
The TPS6302x devices provide a power supply
solution for products powered by either a two-cell or
three-cell alkaline, NiCd or NiMH battery, or a one-
cell Li-ion or Li-polymer battery. Output currents can
go as high as 3 A while using a single-cell Li-ion or
Li-polymer battery, and discharge it down to 2.5 V or
lower. The buck-boost converter is based on a fixed
frequency, pulse width modulation (PWM) controller
using synchronous rectification to obtain maximum
efficiency. At low load currents, the converter enters
power save mode to maintain high efficiency over a
wide load current range. The power save mode can
be disabled, forcing the converter to operate at a
fixed switching frequency. The maximum average
current in the switches is limited to a typical value of
4 A. The output voltage is programmable using an
external resistor divider, or is fixed internally on the
chip. The converter can be disabled to minimize
battery drain. During shutdown, the load is
disconnected from the battery.
The TPS6302x devices operate over a free air
temperature range of –40°C to 85°C. The devices are
packaged in a 14-pin VSON package measuring
3mm × 4mm (DSJ).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
OUTPUT VOLTAGE
DC/DC
TPS63020
TPS63021
VSON (14)
Adjustable
3.3 V
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Output Current
Typical Application Schematic
L₁ 1µH
V_IN
2.5 V to 5.5V
C₁
2X10µF
C₃
0.1µF
L1
L2
VIN
VOUT
VINA
FB
EN
PS/SYNC
PG
GND
PGND
TPS63020
R₁
1MΩ
R₂
180kΩ
V_OUT
3.3V2A
R₃
1MΩ
C₂
4X22µF
Power Good
Output
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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.