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1
FEATURES
DESCRIPTION
APPLICATIONS
V
IN
GND
EN
FB
SW
TPS62250DRV
L
R
1
R
2
C
10 F
OUT
m
V
OUT
MODE
C
4.7 F
IN
m
2.2 Hm
C
22pF
1
V =2Vto6V
IN
Upto600mA
0
10
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100 1000
I -OutputCurrent-
O
Efficiency-%
V =2.3V
IN
V =2.7V
IN
V =3V
IN
V =3.6V
IN
V =4.5V
IN
V =1.8V,
MODE=GND,
L =2.2 H,
DCR110mR
OUT
m
TPS62250
www.ti.com
.......................................................................................................................................................................................... SLVS842 – SEPTEMBER 2008
Peak Current Limited Step Down Converter for USB Applications
2
• High Efficiency Step Down Converter
• Max Peak Current Limit of 1A, Ideal for USB
The TPS62250 device is a high efficient synchronous
step down dc-dc converter optimized for USB
Powered Applications
powered applications. It provides up to 1A peak
• V
IN
Range Optimized for USB from 2V to 6V
output current and limits the average input current to
• 2.25 MHz Fixed Frequency Operation
700mA, making it ideal for applications connected to
• Power Save Mode at Light Load Currents a USB host. With an wide input voltage range of 2V
to 6V, the device supports applications powered by
• Output Voltage Accuracy in PWM mode ± 1.5%
the USB host as well as general applications
• Typ. 15 µ A Quiescent Current
requiring large output capacitors.
• 100% Duty Cycle for Lowest Dropout
The TPS62250 operates at 2.25MHz fixed switching
• Soft Start
frequency and enters Power Save Mode operation at
• Voltage Positioning at Light Loads light load currents to maintain high efficiency over the
entire load current range.
• Available in a Small 2 × 2 × 0,8mm SON package
The Power Save Mode is optimized for low output
• Allows < 1mm Solution Height
voltage ripple. For low noise applications such as
USB Wireless Modems, the device can be forced into
fixed frequency PWM mode by pulling the MODE pin
• Portable USB Peripherals
high. In the shutdown mode, the current consumption
• Wireless Modem Applications
is reduced to less than 1 µ A. TPS62250 allows the
• USB PCTV Applications
use of small inductors and capacitors to achieve a
small solution size.
The TPS62250 is available in a very small 2 × 2 6 pin
SON package.
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.
2 PowerPAD is a trademark of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
