MAX25512 datasheet(4/16 Pages) MAXIM

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Evaluates: MAX25512

MAX25512 Evaluation Kit

SDA and SCL Voltages (J26, J28–J31)

SDA and SCL voltage supplies can be selected between

the VCC_EXT voltage and the fixed 3.3V provided by the

MINIQUSB+. Alternatively, the user can force an external

voltage as digital reference (see Table 1).

Power LED Enable (J1)

A green LED (DS1) is used to indicate that the EV kit

is powered on. The LED can be disconnected from

the power supply, allowing precise current-consumption

evaluation. See Table 2 for shunt positions.

Enable (EN)

The EV kit features an enable input that can be used to

enable/disable the device and place it in shutdown mode.

To enable the EV kit whenever power is applied to IN,

place the jumper across pins 1-2 on jumper J2. To enable

the EV kit using an external enable signal, place the jump-

er across pins 2-3 on J2 and apply a logic signal on the

EN PCB input pad on the EV kit. A 1MΩ pulldown resistor

on the EV kit pulls the EN input to ground in the event that

J2 is left open or the EN signal is high impedance. Refer

to the Enable section in the MAX25512 IC data sheet for

additional information. See Table 3 for J2 jumper settings.

Logic Supply (VCC_EXT)

VCC_EXT voltage must be provided to ensure proper

operation of device’s DIM and FLTB pins (SDA and SCL

pins can also be optionally pulled up to the same voltage).

If enabled through J23 and J27 jumpers, an on-board

linear regulator generates a fixed 5V to pullup the above-

mentioned pins. Alternatively, an external logic supply can

be used. See Table 4 for J23 and J27 jumper settings.

Table 1. SDA and SCL Supply (J26, J28–J31)

Table 2. DS1 Enable (J1)

Table 3. Enable (J2)

Table 4. VCC_EXT Generation (J23 and J27)

*Default position.

SHUNT POSITION

SDA AND SCL SUPPLY

J26

J28

J29

J30

J31

Open*

1-2*

Open*

3.3V (with MINIQUSB+ connected)

Open

1-2

Closed

VCC_EXT

1-External SDA

2-External SCL

3-External GND

1-2

Open

Externally provided

SHUNT POSITION

DS1 POWER LED

Closed*

Connected

Open

Disconnected

SHUNT POSITION

EN PIN

EV KIT OPERATION

1-2*

Connected to IN

Enabled when IN is powered

2-3

Connected to EN PCB pad

Enabled/disabled by signal on EN PCB pad

SHUNT POSITION

VCC_EXT SUPPLY

J23

J27

1-2*

2-3*

5V (provided by on-board regulator)

2-3

1-2

Externally provided

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