TPS62750, TPS62751 High Efficiency Step-Down Converter for USB Applications

TPS62750, TPS62751
High Efficiency Step-Down Converter for USB Applications

1FEATURES
• Efficiency > 90% at Nominal Operating
Conditions
• Programmable Average Input Current Limits
for USB Applications
– 50mA to 300mA for Low Current Limit
Range
– 300mA to 1.3A for High Current Limit
Range
– ±10% Current Accuracy
• Stable Output Voltage for Load Transients to
Minimize Overshoot at Load Step Response
• Hot Plug and Reverse Current Protection
• Automatic PFM/PWM Mode transition
(TPS62750)
• Forced PWM for Noise Sensitive Applications
(TPS62751)
• VIN Range From 2.9V to 6V
• Adjustable VOUT From 0.8V to 0.85×VIN
• Softstart for Inrush Current Prevention
• 2.25 MHz Fixed Frequency Operation
• Short Cicruit and Thermal Shutdown
Protection
• Available in a 2.5 × 2.5 10 pin SON Package

APPLICATIONS
• USB Wireless Modems
• Portable USB peripherals
• Handheld Computers
DESCRIPTION
The TPS6275x device is a highly efficient
synchronous step down dc-dc converter optimized for
USB powered portable applications. It can provide up
to 1300mA average input current and is ideal for
applications connected to a USB host.
With an input voltage range of 2.9 V to 6.0V, the
device supports batteries with extended voltage
range and is ideal for powering USB applications
where USB compliance is required.
The TPS62750 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 TPS62751 operates in
Forced PWM mode allowing use in applications that
are noise sensitive. An output discharge allows the
load to discharge in shutdown.
The 10% accurate average input current limit can be
programmed with an external resistor, allowing use in
applications such as USB, where the current drawn
from the bus must be limited to 500mA.
The TPS6275x allows the use of small inductors and
capacitors to achieve a small solution size. The
TPS6275x is available in a 2,5mm × 2,5mm 10-pin
SON package.

Click here to download Texas Instruments TI pdf datasheet TPS62750, TPS62751 High Efficiency Step-Down Converter for USB Applications 

DatasheetDoc-Texas Instruments TI pdf datasheet download