TPS630250_15 Datasheet, PDF (1/30 Pages) Texas Instruments – TPS63025x High Current, High Efficiency Single Inductor Buck-Boost Converter

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TPS630250
TPS630251, TPS630252
SLVSBJ9B – MAY 2014 – REVISED MARCH 2015
TPS63025x High Current, High Efficiency Single Inductor Buck-Boost Converter
1 Features
•1 Real Buck or Boost Operation with Automatic and
Seamless Transition Between Buck and Boost
Operation
• 2.3 V to 5.5 V input voltage range
• 2 A Continuous Output Current : V_IN≥ 2.5 V,
V_OUT= 3.3 V
• Adjustable and Fixed Output Voltage
• Efficiency up to 95% in Buck or Boost Mode and
up to 97% when V_IN=V_OUT
• 2.5MHz Typical Switching Frequency
• 35-μA Operating Quiescent Current
• Integrated Soft Start
• Power Save Mode
• True Shutdown Function
• Output Capacitor Discharge Function
• Over-Temperature Protection and Over-Current
Protection
• Wide Capacitance Selection
• Small 1.766 mm x 2.086 mm, 20-pin WCSP and
2.5 mm x 3 mm, 14-pin Hot Rod
2 Applications
• Cellular Phones, Smart Phones
• Tablets PC
• PC and Smart Phone accessories
• Point of load regulation
• Battery Powered Applications
3 Description
The TPS63025x are high efficiency, low quiescent
current buck-boost converters suitable for application
where the input voltage is higher or lower than the
output. Output currents can go as high as 2 A in
boost mode and as high as 4 A in buck mode. The
maximum average current in the switches is limited to
a typical value of 4 A. The TPS63025x regulates the
output voltage over the complete input voltage range
by automatically switching between buck or boost
mode depending on the input voltage ensuring a
seamless transition between modes. The buck-boost
converter is based on a fixed frequency, pulse-width-
modulation (PWM) controller using synchronous
rectification to obtain highest efficiency. At low load
currents, the converter enters Power Save Mode to
maintain high efficiency over the complete load
current range. There is a PFM/PWM pin that allows
the user to choose between automatic PFM/PWM
mode operation and forced PWM operation. During
PWM mode a fixed-frequency of typically 2.5 MHz is
used. 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 device is
packaged in a 20-pin WCSP package measuring
1.766 mm x 2.086mm and 14-pin HotRod package
measuring 2.5 mm x 3mm.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS63025x
DSBGA (20)
VQFN (14)⁽²⁾
1.766 mm × 2.086 mm
2.5 mm x 3 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
(2) Product Preview
4 Typical Application
sp
L₁ 1µH
V_IN
2.7 V to 5.5 V
C₁
10µF
TPS63025
L1
L2
VIN
VOUT
EN
FB
VINA
GND
PFM/
PWM
PGND
V_OUT
3.3 V up to 2A
C₂
2X22µF
Efficiency vs Output Current
V_IN = 2.8V, V_OUT = 3.3V
V_IN = 3.3V, V_OUT = 3.3V
V_IN = 3.6V, V_OUT = 3.3V
V_IN = 4.2V, V_OUT = 3.3V
TPS63025, Power Save Enabled
0.1
Output Current (mA)
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. UNLESS OTHERWISE NOTED, this document contains PRODUCTION
DATA.