Input/Output Connector Descriptions

2-2

2.1

Input/Output Connector Descriptions

2.1.1

J1—VBAT

This is the positive connection to the input power supply. The leads to the input

supply should be twisted and kept as short as possible to minimize EMI trans-

mission.

2.1.2

J2—GND

This is the return connection for the input power supply.

2.1.3

J3—VOUT

This is the positive connection from the output of the power supply. Connect

this pin to the positive input of the load.

2.1.4

J4—GND

This is the negative connection from the output of the power supply. Connect

this pin to the negative input of the load.

2.1.5

J5—LBO

The LBO pin is an open-drain output configured with a 1M pull-up resistor.

2.1.6

J6—GND

This is the ground connection for the LBO pin.

2.1.7

JP1—SYNC

This jumper enables or disables the power save mode at light loads. If SYNC

is connected to VBAT, the power save mode is disabled. Connecting SYNC to

GND enables the power save mode. When the SYNC pin is not connected to

VBAT or GND, the switch of the frequency of the device will synchronize to a

user-provided signal of 500kHz to 700kHz.

2.1.8

JP2—EN

This jumper enables and disables the TPS61090 on the EVM.

2.2

Setup

Connect an input supply between J1 and J2. The voltage range on this supply

should stay between 1.8V and 5.0V. Connect a load between J3 and J4. En-

able the output by positioning a jumper to connect the EN and ON pins. Config-

ure the SYNC jumper to the desired setting.