Datasheet

2-3

Schematic of the EVM

Table 2–2.Components on the TPS60130 EVM

Part Value Manufacturer, Part Number Description

C1, C2 2.2 µF, 10 V Taiyo Yuden, LMK212BJ225MG-T Ceramic flying capacitors

C3 10 µF, 10 V Taiyo Yuden, LMK325BJ106MN-T Tantalum input capacitor

C4 33 µF, 16 V Sprague, 595D336X0016B2T Tantalum output capacitor

C5 4.7 µF, 10 V Taiyo Yuden, LMK316BJ475KL-T Ceramic bypass capacitors at input and output

C6 Empty

C7 100 nF Filter capacitor for the LBI input signal

R1 590 kΩ E96-Series LBI input voltage adjustment

R2 402 kΩ E96-Series LBI input voltage adjustment

R3 1 MΩ Pullup for the open drain output LBO

Resistors R1/R2 adjust the input voltage of the LBI input for low battery

detection. It is compared to the internal reference voltage of 1.21 V. Capacitor

C7 works as a filter capacitor for the LBI input voltage. This capacitor is

recommended because at the switching point of the LBI comparator, noise at

the input can trigger the LBO and this can lead to oscillations at the LBO pin.

Since the LBO output that signals a low battery state is an open drain output,

it requires an external pullup resistor (R3). In applications that do not require

low battery detection, these four parts can be omitted.

For the input and output voltages, there are two six-pin connectors on the

board. Each has the first three pins for the supply (In or Out) and the last three

pins for the ground (GND) signal.

The three-pin connector can be used to connect the ENABLE pin of the device.

The connector has the supply (In) signal at the first pin, the logic signal at the

second pin, and the ground (GND) signal at the third pin. This way it is possible

to use jumpers to connect the pin either to input (supply voltage) or to ground

to turn on or turn off the device. It is also possible to connect any other signal

by using an external signal source and connecting it to the second pin. The

ENABLE pin is a CMOS logic level input; refer to the data sheet for level

specifications. The value of the signal connected to the logic pins can be higher

than the supply voltage, but must not exceed the maximum ratings (see data

sheet).

Applying a logic low level to the ENABLE input turns off the device and

disconnects the output from the input. In this state, the supply current

decreases to 0.05 µA. For normal operation, connect the ENABLE signal to

the input voltage or a logic high level respectively.