TPS62560_15 Datasheet, PDF (1/32 Pages) Texas Instruments – 2.25-MHz, 600-mA Step-Down Converter in TSOT and 2 × 2 × 0.8-mm QFN Package

TPS62560, TPS62561
TPS62562
www.ti.com
SLVS815C – JANUARY 2008 – REVISED DECEMBER 2009
2.25-MHz, 600-mA Step-Down Converter in TSOT and 2 × 2 × 0.8-mm QFN Package
Check for Samples: TPS62560, TPS62561, TPS62562
FEATURES
1
• Output Current up to 600 mA
• V_IN Range from 2.5 V to 5.5 V
• Output Voltage Accuracy in PWM Mode ±2.5%
• Typical 15-μA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Soft Start
• Available in a Small TSOT, and
2 mm × 2 mm × 0.8 mm QFN Package
• For Improved Features Set, see TPS62260
APPLICATIONS
• PDAs, Pocket PCs, Portable Media Players
• Low-Power DSP Supply
• POL Applications
DESCRIPTION
The TPS62560 device is a high efficiency
synchronous step down converter, optimized for
battery powered portable applications. It provides up
to 1000-mA output current from batteries, such as
single Li-Ion or other common chemistry AA and AAA
cells.
With an input voltage range of 2.5 V to 5.5 V, the
device is targeted to power a large variety of portable
handheld equipment or POL applications.
The TPS62560 family operates at 2.25-MHz fixed
switching frequency and enters a Power Save Mode
operation at light load currents to maintain a 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 TPS62560 allows the use of small inductors and
capacitors to achieve a small solution size.
TPS62560 and TPS62562 are available in a 2-mm ×
2-mm, 6-terminal QFN package, whereas the
TPS62561 is available in a 5-terminal TSOT23
package.
V_IN = 2.5 V to 5.5 V
C_IN
4.7 mF
TPS62560DRV
V_IN
SW
EN
GND
FB
MODE
L
2.2 mH
R₁
R₂
C₁
22 pF
Up to 600 mA
V_OUT
C_OUT
10 mF
100
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
V_OUT = 1.8 V
MODE = GND
20
L = 2.2 mH
10
DCR 110 mR
0
0.01 0.1
1
10 100 1000
I_OUT – Output Current – mA
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 © 2008–2009, Texas Instruments Incorporated