TPS63030_15 Datasheet, PDF (1/26 Pages) Texas Instruments – TPS6303x High Efficiency Single Inductor Buck-Boost Converter With 1-A Switches

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TPS63030, TPS63031
SLVS696C – OCTOBER 2008 – REVISED OCTOBER 2015
TPS6303x High Efficiency Single Inductor Buck-Boost Converter With 1-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
• 800-mA Output Current at 3.3 V in Step-Down
Mode (V_IN = 3.6 V to 5.5 V)
• Up to 500-mA Output Current at 3.3 V in Boost
Mode (V_IN > 2.4 V)
• Automatic Transition Between Step-Down and
Boost Mode
• Device Quiescent Current less than 50 μA
• Power-Save Mode for Improved Efficiency at Low
Output Power
• Forced Fixed Frequency Operation and
Synchronization Possible
• Load Disconnect During Shutdown
• Overtemperature Protection
• Available in a Small 2.5-mm × 2.5-mm 10-Pin
VSON Package (QFN)
2 Applications
• All Two-Cell and Three-Cell Alkaline, NiCd or
NiMH or Single-Cell Li Battery Powered Products
• Portable Audio Players
• Mobile Phones
• Personal Medical Products
• White LEDs
3 Description
The TPS6303x 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 600 mA 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 1000 mA. 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 TPS6303x devices operate over a free air
temperature range of –40°C to 85°C. The devices are
packaged in a 10-pin VSON package measuring 2.5
mm × 2.5 mm (DSK).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS63030
TPS63031
VSON (10)
2.50 mm x 2.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_IN
1.8 V to
5.5 V
Typical Application Schematic
L1
1.5 µH
C1
10 µF
C3
0.1µF
L1
L2
VIN
VOUT
VINA
EN
FB
PS/SYNC
GND PGND
TPS63031
C2
2X10 µF
V_OUT
3.3 V up to
800 mA
Efficiency vs Output Current
100
V_I = 3.6 V, V_O = 3.3 V
90
80
70
V_I = 2.4 V, V_O = 3.3 V
60
50
40
30
20
10
0
0.1
TPS63031
Power Save Enabled
1
10
100
I_O - Output Current - mA
1000
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.