Datasheet

Setup

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2 Setup

This section describes the jumpers and connectors on the EVM as well as how to properly connect, set

up, and use the TPS3808G01EVM.

2.1 Input / Output Connector Descriptions

J1: RST

This connector is the RST output. Connect this output to a multimeter, oscilloscope, or external circuit

to verify that RST goes low when MONITOR VOLTAGE goes below its threshold.

J2: MR

This connector is the manual reset input of the TPS3808G01. Pulling this pin low causes the device to

signal a reset. For convenience, pull this pin low by placing a short across the connector.

J3: MONITOR VOLTAGE

This connector is the voltage to be monitored. Connect J3 to a power supply or other voltage source.

RST should transition low when this voltage drops below its threshold.

J4: VDD

This connector is the power-supply connection for the TPS3808G01. It can be between 1.7 V and 6.5

J5: GND

This connector is the return connection for the input power supply. It is electrically connected to J6.

J6: GND

This connector is the return connection for the power supply to be monitored. It is electrically

connected to J5.

JP2: RST Pull-Up

Connecting a short across JP2 connects a 10-kΩ pull-up resistor to the RST output.

JP3: Reset Timer

The setting of this jumper configures the reset delay of the device as described in Table 1.

Table 1. Reset Timer Settings

Setting Description

Open No connection to CT;

reset delay set to 20 ms

Short connected CT connected to a timer capacitor;

across pins 1 and 2 reset delay set to 125 ms

Short connected CT connected to a pull-up resistor;

across pins 2 and 3 reset delay set to 300 ms

JP5: Fixed Rail

Short this jumper for use of a fixed-voltage TPS3808Gxx device.

JP4: Adjustable Rail

Short this jumper for use of the adjustable-voltage TPS3808G01.

TPS3808G01EVM SBVU015–April 2010