MAX77503 datasheet(4/26 Pages) MAXIM

4 / 26 page

Maxim Integrated │ 4

www.maximintegrated.com

Evaluates: MAX77503

MAX77503 Evaluation Kit

EV Kit Default Configuration

● VIN (SUP) = 3V to 14V

● VOUT = 1.2V, 1.8V, or 3.3V depending on ordering

option. Output is further adjustable:

• 0.8V to 5V for internal feedback. See the Setting

the Output Voltage (Internal Feedback Version)

section.

• 1.55V to 99%VSUP for external feedback. See the

Setting the Output Voltage (External Feedback

Version) section.

● IOUT = 1.5A maximum

● SKIP mode enabled (MODE = 0)

● 1ms soft-start time (tSS)

● 2A peak inductor current limit (ILX-PEAK)

● Active discharge enabled (ADEN = 1, internal

feedback versions only)

• Active discharge function not available for external

feedback version.

Quick-Start

Required Equipment

● MAX77503 EV kit

● Power supply with 15V and 2A capability

● Two digital voltmeters (DVM)

● Ammeter

● Windows-based PC

● Micro-USB cable

● GUI

Note: In the following sections, software-related items are

identified by bolding. Text in

bold refers to items directly

from the EV kit software. Text in

bold and underlined

refers to items from the Windows operating system.

Procedure

1) Install EV kit shunts per Table 1.

2) Connect a DVM to the SUPS and GNDS terminals to

measure input voltage.

Table 1. Default Shunt Positions and Jumper Descriptions

REFERENCE

DESIGNATOR

DEFAULT

POSITION

FUNCTION

1-2

1-2: Connects EN to VSUP

2-3: Connects EN to GND

1-2

1-2: Connects BIASEN to VIO

2-3: Connects BIASEN to GND

1-2

1-2: Connects POK to OUT through a 100kΩ resistor.

J100

N/A

J100 is an evaluation header. Do not connect shunts to J100.

J101

2-3

1-2: Sets the I2C bus voltage to the 3.3V EV kit logic rail.

2-3: Sets the I2C bus voltage to the 1.8V EV kit logic rail.

J102

Open

1-2: Connects VUSB to VSUP through Schottky diode, D1. Install this jumper to power the

MAX77503 VSUP from VUSB. This jumper allows for communication with the MAX77503

through the on-board USB-to-I2C translator without the need for an external power supply.

Note: Remove this jumper any time an external power supply is applied as an input source.

J203

1-2

1-2: Connects the output of the MAX5805 DAC to drive the on board electronic load.

J204

1-2

1-2: Connects the U202 amplifier to the gate of the Q202 load MOSFET.

2-3: Connects the U202 amplifier to the gate of the Q201 depopulated TO-220

electronic load MOSFET.

J205

J206

1-2

1-2: Connects OUT to the onboard electronic load (each jumper supports up to 1A).

MAX77503 Datasheet(PDF) 4 Page - Maxim Integrated Products

MAX77503 Datasheet(HTML) 4 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26

Datasheet Download

Link URL