Texas Instruments TPS61130EVM, User Manual, Page: 13 / 20

Setup
2-3 Setup
2.1.11 JP4 – LDOIN
This is the input connection to the integrated LDO of the TPS61130. Shorting
the VBAT pin and the center pin connects the VBAT input of the EVM to the
LDOIN on the TPS61130. Shorting the VOUT pin and the center pin connects
the VOUT pin of the EVM to the LDOIN on the TPS61130. This jumper may
be removed and any voltage up to 5.5 V can be applied to the input of the LDO
by directly connecting a voltage source to the center pin of JP4.
2.2 Setup
Connect an input supply between J1 and J2. The voltage range on this supply
should stay between 3.0 V and 5.5 V. Connect a load for the SEPIC converter
between J3 and J4. Connect a load for the LDO between J5 and J6. Configure
the SKIPEN jumper to the desired setting. Configure JP4 to provide power to
the LDO from the desired source.
2.3 Operation
The EVM has been optimized to operate from a Li-Ion battery input voltage
range (3.0 V to 4.2 V). The SEPIC output voltage is set to 3.3 V and is capable
of supplying 300 mA. The LDO output is set to 1.5 V and is capable of supplying
200 mA. After connecting the input and output connections, and setting the
SKIPEN jumper (JP1) to the desired setting, turn on the input supply, and then
enable the outputs as desired with JP2 and JP3.
The resistor divider on the LBI pin is designed to trip the LBO output when the
input supply voltage drops below 2.9 V.