TPS61252_15 Datasheet, PDF (1/27 Pages) Texas Instruments – TPS61252 Tiny 1.5-A Boost Converter With Adjustable Input Current Limit

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS61252
SLVSAG3A – SEPTEMBER 2010 – REVISED DECEMBER 2014
TPS61252 Tiny 1.5-A Boost Converter With Adjustable Input Current Limit
1 Features
•1 Resistor Programmable Input Current Limit
– ±20% Current Accuracy at 500 mA over Full
Temperature Range
– Programmable from 100 mA up to 1500 mA
• Up to 92% Efficiency
• V_IN Range from 2.3 V to 6.0 V
• Power Good Indicates Appropriate Output Voltage
Level
• Adjustable Output Voltage up to 6.5 V
• 100% Duty-Cycle Mode When V_IN > V_OUT
• Load Disconnect and Reverse Current Protection
• Short Circuit Protection
• Typical Operating Frequency 3.25 MHz
• Available in a 2-mm × 2-mm WSON-8 Package
2 Applications
• USB Host Supplies from a Single Li-Ion Battery
• Current Limited Applications
• Li-Ion Applications
• Audio Applications
• RF-PA Buffer
3 Description
The TPS61252 device provides a power supply
solution for products powered by either a three-cell
alkaline, NiCd or NiMH battery, or an one-cell Li-Ion
or Li-polymer battery. The wide input voltage range is
ideal to power portable applications like mobile
phones or computer peripherals. The device has a
resistor programmable (R_ILIM) input current limit and
is suitable for a wide variety of applications.
During light loads, the device automatically enters
skip mode (PFM), which allows the converter to
maintain the required output voltage, while only
drawing 30 μA quiescent current from the battery.
This allows maximum efficiency at lowest quiescent
currents.
TPS61252 allows the use of small inductors and
capacitors to achieve a small solution size. The
possibility to reduce the current limit by a external
resistor offers the potential use of physically even
smaller inductors with lower rated currents to further
reduce total solution sizes of the power supply.
During shutdown, the load is completely disconnected
from the battery. The TPS61252 is available in a 8-
pin WSON package measuring 2 mm × 2 mm (DSG).
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS61252
WSON (8)
2.00 mm x 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Schematic
V_IN
2.3 V to 6.0 V
L1
1 μH
C1
10 µF
TPS61252
SW
VOUT
VIN
EN
FB
ILIM
R_ILIM
20 kΩ
GND
PG
R1
768 kΩ
R2
243 kΩ
C_FF
100 pF
R4
1 MΩ
V_OUT
5.0 V
C_OUT
22 µF
Power Good
Output
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.