TPS62290_1 Datasheet, PDF (1/25 Pages) Texas Instruments – 1-A Step Down Converter in 2 x 2 SON Package

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TPS62290, TPS62291, TPS62293
SLVS764C – JUNE 2007 – REVISED MARCH 2008
1-A Step Down Converter in 2 x 2 SON Package
FEATURES
1
• High Efficiency Step Down Converter
• Output Current up to 1000 mA
• V_IN Range From 2.3 V to 6 V
• 2.25 MHz Fixed Frequency Operation
• Power Save Mode at Light Load Currents
• Output Voltage Accuracy in PWM mode ±1.5%
• Fixed Output Voltage Options
• Typ. 15-µA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Voltage Positioning at Light Loads
• Available in a 2 × 2 × 0,8 mm SON Package
APPLICATIONS
• Cell Phones, Smart-phones
• WLAN
• PDAs, Pocket PCs
• Low Power DSP Supply
• Portable Media Players
• POL
DESCRIPTION
The TPS6229x device is a highly efficient
synchronous step down dc-dc converter optimized for
battery powered portable applications. It provides up
to 1000-mA output current from a single Li-Ion cell.
With an input voltage range of 2.3 V to 6 V, the
device supports batteries with extended voltage
range and are ideal to power portable applications
like mobile phones and other portable equipment.
The TPS6229x 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 1 µA.
The TPS6229x allows the use of small inductors and
capacitors to achieve a small solution size.
The TPS6229x is available in a 2-mm × 2-mm 6-pin
SON package.
V_IN 2.7 V to 6 V
C_IN
10 mF
TPS62290DRV
V_IN
SW
EN
GND
FB
MODE
L1
2.2 mH
R₁
360 kW
R₂
180 kW
V_OUT 1.8 V,
1000 mA
C₁
22 pF
C_OUT
10 mF
100
V_IN = 4.2 V
90
80
V_IN = 3.8 V
V_IN = 5 V
70
V_IN = 4.5 V
60
50
V_OUT = 3.3 V,
MODE = GND,
L = 2.2 mH
40
30
0.00001 0.0001 0.001 0.01 0.1
1
I_O - Output Current - A
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 © 2007–2008, Texas Instruments Incorporated