TPS62260_08 Datasheet, PDF (1/31 Pages) Texas Instruments – 2.25 MHz 600 mA Step Down Converter in 2x2SON/TSOT-23 Package

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TPS62260, TPS62261
TPS62262, TPS62263
SLVS763B – JUNE 2007 – REVISED FEBRUARY 2008
2.25 MHz 600 mA Step Down Converter in 2x2SON/TSOT-23 Package
FEATURES
1
•2 High Efficiency Step Down Converter
• Output Current up to 600 mA
• Wide V_IN Range from 2 V to 6 V for Li-Ion
Batteries with Extended Voltage Range
• 2.25 MHz Fixed Frequency Operation
• Power Save Mode at Light Load Currents
• Output Voltage Accuracy in PWM mode ±1.5%
• Typ. 15 µA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Soft Start
• Voltage Positioning at Light Loads
• Available in a small 2×2×0,8mm SON and
TSOT-23 package
• Allows <1mm Solution Height
APPLICATIONS
• PDAs, Pocket PCs
• Low Power DSP Supply
• Portable Media Players
• POL applications
DESCRIPTION
The TPS62260 device is a high efficient synchronous
step down dc-dc converter optimized for battery
powered applications. It provides up to 600-mA
output current from a single Li-Ion cell and is ideal to
power mobile phones and other portable applications.
With an wide input voltage range of 2 V to 6 V, the
device supports applications powered by Li-Ion
batteries with extended voltage range, two and three
cell alkaline batteries, 3.3 V and 5 V input voltage
rails.
The TPS62260 operates at 2.25 MHz fixed switching
frequency and enters Power Save Mode operation at
light load currents to maintain high efficiency over the
entire load current range.
The Power Save Mode is optimized for low output
voltage ripple. For low noise applications, the device
can be forced into fixed frequency PWM mode by
pulling the MODE pin high. In the shutdown mode,
the current consumption is reduced to less than 1µA.
TPS62260 allows the use of small inductors and
capacitors to achieve a small solution size.
The TPS62260 is available in a very small 2×2 6 pin
SON and TSOT-23 5 pin package.
V_IN = 2V to 6V
C_IN
4.7 mF
TPS62260DRV
V_IN
SW
EN
GND
FB
MODE
L
2.2 mH
R₁
R₂
C₁
22 pF
Up to 600mA
V_OUT
C_OUT
10 mF
100 _{VIN = 2.3 V}
90 _{VIN = 2.7 V}
80 V_IN = 3 V
70
V_IN = 3.6 V
60
V_IN = 4.5 V
50
40
30
20
10
0
0.01
V_OUT = 1.8 V,
MODE = GND,
L = 2.2 mH,
DCR 110 mR
0.1
1
10 100
I_O - Output Current -
1000
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.
PowerPAD is a trademark of Texas Instruments.
2
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 © 2007–2008, Texas Instruments Incorporated