Datasheet

1-1
Introduction
Introduction
The Texas Instruments (TI) TPS60120 and TPS60130 charge pumps are
regulated, high efficiency voltage converters. The TPS60120 delivers an out-
put voltage of 3.3 V. The maximum output current is 200 mA for 2 V to 3.6 V,
and 100 mA for 1.8 V to 2 V. The TPS60130 has an output voltage of 5 V. The
maximum output current is 300 mA for an input voltage from 3 V to 5.4 V, and
150 mA for 2.7 V to 3 V.
Both devices work either as voltage doublers or, in 1.5-times mode, dependent
on the input voltage. Therefore these devices are high efficiency charge
pumps. For more details refer to the datasheets [literature numbers SLVS257
(TPS60120) and SLVS258 (TPS60130)].
The minimum number of external capacitors is four. The EVM is built with six
(TPS60120) or five (TPS60130) external capacitors for optimized
performance. Additional resistors and a capacitor at LBI and LBO are added.
With the given resistor values, the LBO output delivers a low signal for an input
voltage, V
IN
, of 2 V or less for TPS60120, and 3 V or less for TPS60130. To
select the resistor values for other input voltage ranges, refer to the datasheet.
The flying capacitors have to be ceramic because they are charged and
discharged very fast and so their ESR has to be low. Tantalum capacitors are
not able to handle such high frequencies, because the capacitance value of
a tantalum capacitor decreases with increasing frequency.
The TPS60120 and TPS60130 EVM boards can also be used to evaluate
other devices of this family (TPS60121, TPS60122, TPS60123, TPS60131,
TPS60132, and TPS60133). For that purpose, replace the integrated circuit
and capacitors C1 to C4 (see Chapter 2) with the values recommended in the
datasheets. For devices with the powergood (PG) feature, the LBI resistors
can be removed, but it is not necessary. The LBO pullup resistor works as the
PG pullup; the LBO pad gives the PG signal.
Chapter 1