TPS63051_14 Datasheet, PDF (1/28 Pages) Texas Instruments – SINGLE INDUCTOR BUCK-BOOST WITH 1A SWITCHES AND ADJUSTABLE SOFT START

TPS63051
www.ti.com
SLVSAM8 – JULY 2013
SINGLE INDUCTOR BUCK-BOOST WITH 1A SWITCHES AND ADJUSTABLE SOFT START
Check for Samples: TPS63051
FEATURES
1
• 2.5V to 5.5V Input Voltage Range
• 0.5A Continuous Output Current : V_IN ≥2.5V,
V_OUT = 3.3V
• Real Buck or Boost Operation for Highest
Efficiency
• Efficiency >90% in Boost Mode and >95% in
Buck Mode
• Seamless Buck-Boost and PFM-PWM
transition with the lowest Output Voltage
Ripple
• 2.5MHz Typical Switching Frequency
• Adjustable Average Input Current Limit
• Adjustable Soft Start
• Device Quiescent Current Less Than 50μA
• Power Save Mode
• Load Disconnect During Shutdown
• Over-Temperature Protection
• Small 1.6mm x 1.2mm, 12-pin WCSP package
• Tablet PCs
• PC and Smart Phone Accessories
• USB Powered Applications
DESCRIPTION
The TPS63051 is high efficiency, low quiescent
current buck-boost converter suitable for applications
where the input voltage can be higher or lower than
the output voltage . Output currents can go as high
as 500mA in boost mode and as high as 1A in buck
mode. 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 maximum average input
current in the switches is limited to a typical value of
1A. 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 WCSP package measuring
1.6mm × 1.2mm.
APPLICATIONS
• Cellular Phones, Smart phones
L₁ 1.5 µH
V_IN
2.5 V to 5.5 V
C₁
10µF
TPS63051
L1
L2
VIN
VOUT
EN
FB
ILIM0
PFM/
PWM
GND
PG
ILIM1
SS
R₂
1MΩ
V_OUT
3.3 V /500m A
C₂
10µF
C₃
1nF
ILIM0
Low
ILIM1
Current
LIMIT set
Low
0.4*IIN_MAX
High
Low
0.5*IIN_MAX
Low
High 0.65*IIN_MAX
High
High
IIN_MAX
Figure 1. Typical Circuit
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated