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SLVS806A – APRIL 2009 – REVISED MAY 2009
3.5-MHz High Efficiency Step-Up Converter
1
FEATURES
Efficiency > 90% at Nominal Operating
Conditions
Total DC Output Voltage Accuracy 5.0V±2%
Typical 30
µA
Quiescent Current
Best in Class
Line and Load Transient
Wide V
IN
Range From 2.3V to 5.5V
Output current up to 450mA
Automatic PFM/PWM Mode transition
Low Ripple Power Save Mode for Improved
Efficiency at Light Loads
Internal Softstart, 250µs typical Start-Up time
3.5MHz Typical Operating Frequency
Load Disconnect During Shutdown
Current Overload and Thermal Shutdown
Protection
Three Surface-Mount External Components
Required (One MLCC Inductor, Two Ceramic
Capacitors)
Total Solution Size <13 mm
2
Available in a 6-pin WCSP and 2×2-SON
Package
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DESCRIPTION
The TPS6124x device is a high efficient synchronous
step up DC-DC converter optimized for products
powered by either a three-cell alkaline, NiCd or
NiMH, or one-cell Li-Ion or Li-Polymer battery. The
TPS6124x supports output currents up to 450mA.
The TPS61240 has an input valley current limit of
500mA, and the TPS61241 has an input valley
current of 600mA.
With an input voltage range of 2.3V to 5.5V the
device supports batteries with extended voltage
range and are ideal to power portable applications
like mobile phones and other portable equipment.
The TPS6124x boost converter is based on a
quasi-constant on-time valley current mode control
scheme.
The TPS6124x presents a high impedance at the
V
OUT
pin when shut down. This allows for use in
applications that require the regulated output bus to
be driven by another supply while the TPS6124x is
shut down.
During light loads the device will automatically pulse
skip allowing maximum efficiency at lowest quiescent
currents. In the shutdown mode, the current
consumption is reduced to less than 1µA.
TPS6124x allows the use of small inductors and
capacitors to achieve a small solution size. During
shutdown, the load is completely disconnected from
the battery. The TPS6124x is available in a 6-pin
WCSP and 2×2 SON package.
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APPLICATIONS
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USB-OTG Applications
Portable HDMI Applications
Cell Phones, Smart-Phones
PDAs, Pocket PCs
Portable Media Players
Digital Cameras
TPS61240
1
m
H
L
V
OUT
C
OUT
4.7
m
F
V
OUT
5 V
V
IN
V
IN
FB
C
IN
2.2
m
F
EN
GND
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 © 2009, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
