TPS62590 Datasheet, PDF (1/24 Pages) Texas Instruments – 1-A Step Down Converter in 2 x 2 QFN Package

TPS62590
www.ti.com
SLVS897B – JANUARY 2009 – REVISED APRIL 2011
1-A Step Down Converter in 2 x 2 QFN Package
Check for Samples: TPS62590
FEATURES
1
•2 Output Current up to 1000 mA
• Input Voltage Range from 2.5 V to 5.5 V
• Output Voltage Accuracy in PWM mode ±2.5%
• Typ. 15-μA Quiescent Current
• 100% Duty Cycle for Lowest Dropout
• Available in a 2 × 2 × 0.8 mm QFN Package
• For Improved Features Set, See TPS62290
APPLICATIONS
• Portable Handheld
• WLAN
• Low Power DSP Supply
• POL
DESCRIPTION
The TPS62590 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 TPS62590 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 TPS62590 allows the use of small inductors and
capacitors to achieve a small solution size.
The TPS62590 is available in a 2-mm × 2-mm 6-pin
QFN package.
Empty para
V_{I N}
2.5 V to 5.5 V
C_IN
10mF
TPS62590DRV
5 _VIN
SW ¹
L
2.2 mH
4
EN
2
MODE
FB 3
GND ⁶
PwrPAD
R1
R2
Typical Application
C1
22pF
V_OUT
0.75 V to V_IN
C_OUT
10mF
100
90
80
V_I = 5 V
70
V_I = 4.2 V
60
V_I = 3.8 V
50
40
30
V_OUT = 3.3 V,
20
MODE = GND,
10
0
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.
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 © 2009–2011, Texas Instruments Incorporated