TPS63050_16 Datasheet, PDF (1/33 Pages) Texas Instruments – Single Inductor Buck-Boost With 1-A Switches and Adjustable Soft Start

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS63050, TPS63051
SLVSAM8C – JULY 2013 – REVISED JULY 2015
TPS6305x Single Inductor Buck-Boost With 1-A Switches and Adjustable Soft Start
1 Features
•1 Real Buck or Boost with Seamless Transition
Between Buck and Boost Mode
• 2.5 V to 5.5 V Input Voltage Range
• 0.5-A Continuous Output Current: V_IN ≥ 2.5 V,
V_OUT = 3.3 V
• Adjustable and Fixed Output Voltage Version
• Efficiency > 90% in Boost Mode and > 95% in
Buck Mode
• 2.5-MHz Typical Switching Frequency
• Adjustable Average Input Current Limit
• Adjustable Soft-Start Time
• Device Quiescent Current < 60 μA
• Automatic Power Save Mode or Forced PWM
Mode
• Load Disconnect During Shutdown
• Overtemperature Protection
• Small 1.6mm x 1.2mm, 12-pin WCSP and 2.5mm
x 2.5mm 12-pin HotRod™ QFN package
2 Applications
• Cellular and Smart Phones
• Tablets PC
• PC and Smart Phone Accessories
• Battery Powered Applications
• Smart Grid/Smart Meter
3 Description
The TPS6305x family of devices is a high efficiency,
low quiescent-current buck-boost converter, suitable
for applications where the input voltage is higher or
lower than the output.
Continuous output current can go as high as 500 mA
in boost mode and as high as 1 A in buck mode. The
maximum average current in the switches is limited to
a typical value of 1 A. The TPS6305x family of
devices regulate the output voltage over the complete
input voltage range by automatically switching
between buck or boost mode depending on the input
voltage, ensuring seamless transition between
modes.
The buck-boost converter is based on a fixed-
frequency, pulse-width-modulation (PWM) controller
using synchronous rectification to obtain the highest
efficiency. At low load currents, the converter enters
Power Save Mode to maintain high efficiency over
the complete load current range.
The PFM/PWM pin allows the user to select 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 12-pin DSBGA and in a 12-pin
HotRod package.
PART NUMBER
TPS63050
TPS63051
Device Information ⁽¹⁾
PACKAGE
BODY SIZE (NOM)
DSBGA (12)
1.56mm x 1.16mm
VQFN (12)
2.50mm × 2.50mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic (WCSP)
L₁ 1.5 µH
2.5 V to 5.5 V
V_IN
C₁
10µF
V_IH or V_IL
TPS63051
L1
L2
VIN
VOUT
EN
FB
ILIM0
PFM/
PWM
GND
PG
ILIM1
SS
R₂
1MΩ
V_IH or V_IL
C₃
1nF
Efficiency vs Output Current
C₂
10µF
3.3 V / 500mA
C₃
V_OUT
10µF
VIN = 2.8V, VOUT = 3.3V
VIN = 3.6V, VOUT = 3.3V
TPS63051
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. PRODUCTION DATA.