TPS61240-Q1_15 Datasheet, PDF (1/25 Pages) Texas Instruments – 3.5-MHz High Efficiency Step-Up Converter

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3.5-MHz High Efficiency Step-Up Converter
Check for Samples: TPS61240-Q1
TPS61240-Q1
SLVSAO4 – DECEMBER 2010
FEATURES
1
• Qualified for Automotive Applications
• Efficiency > 90% at Nominal Operating
Conditions
• Total DC Output Voltage Accuracy 5.0V±2%
• Typical 30 mA 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, 250ms 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 mm²
• Available in a 2×2-SON Package
DESCRIPTION
The TPS61240-Q1 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-Q1 has an input valley current limit of
500mA.
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 1mA.
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 2×2 SON
package.
1 mH
V_IN
C_IN
2.2 mF
TPS61240
L
V_OUT
C_OUT
V_IN
FB
EN
GND
4.7 mF
V_OUT 5 V
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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 © 2010, Texas Instruments Incorporated