FEATURES
1.8 V to 6 V Input Voltage Range
Adjustable Output Voltage Range up to 28 V
400 mA (TPS61040) and 250 mA (TPS61041)
Internal Switch Current
Up to 1 MHz Switching Frequency
28 µA Typical No Load Quiescent Current
1 µA Typical Shutdown Current
Internal Softstart
Available in a Tiny 5-Pin SOT23 Package
DESCRIPTION
The TPS61040/41 is a high-frequency boost con-
verter dedicated for small to medium LCD bias supply
and white LED backlight supplies. The device is ideal
to generate output voltages up to 28 V from a dual
cell NiMH/NiCd or a single cell Li-Ion battery. The
part can also be used to generate standard 3.3 V/5 V
to 12 V power conversions.
The TPS61040/41 operates with a switching fre-
quency up to 1 MHz. This allows the use of small
external components using ceramic as well as tanta-
lum output capacitors. Together with the tiny SOT23
package, the TPS61040/41 gives a very small overall
solution size. The TPS61040 has an internal 400 mA
switch current limit, while the TPS61041 has a 250
mA switch current limit, offering lower output voltage
ripple and allows the use of a smaller form factor
inductor for lower power applications. The low quiesc-
ent current (typically 28 µA) together with an
optimized control scheme, allows device operation at
very high efficiencies over the entire load current
range.
