MAX1543EVKIT Maxim Integrated Products, MAX1543EVKIT Datasheet

MAX1543EVKIT

Manufacturer Part Number

MAX1543EVKIT

Description

Power Management Modules & Development Tools MAX1543 EVAL KIT MAX1543 EVAL KIT

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1543EVKIT.pdf (6 pages)

Specifications of MAX1543EVKIT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX1543 evaluation kit (EV kit) is a fully assembled

and tested surface-mount circuit board that provides

the voltages and features required for active-matrix,

thin-film transistor (TFT) liquid-crystal displays (LCDs).

The EV kit contains a step-up switching regulator, a

positive two-stage charge pump for the TFT gate-on

supply, and a negative single-stage charge pump for

the TFT gate-off supply. Also included are two opera-

tional amplifiers that can be used to drive the LCD

backplane (VCOM) or the gamma-correction divider

string, and a logic-controlled, high-voltage switch with

adjustable delay. The EV kit also evaluates the

MAX1542 after IC replacement.

The EV kit operates from a DC supply voltage of +2.6V

to +5.5V. The step-up switching regulator is configured

for a +8V output providing at least 250mA. The positive

charge pump is configured for a +22V output providing

at least 20mA. The negative charge pump is configured

for a -7V output providing at least 20mA. The two oper-

ational amplifiers are both configured for +4V, each

capable of providing up to ±150mA peak. The high-

voltage switch can be used to delay the startup of the

positive charge pump’s output. The delay time is set

with an external capacitor.

The MAX1543 EV kit demonstrates low quiescent cur-

rent and high efficiency (85%) for maximum battery life.

Operation at 1.2MHz allows the use of tiny surface-

mount components. The MAX1543 QFN package

(0.8mm maximum height) with low-profile external com-

ponents allows this circuit to be less than 1.25mm high.

19-2881; Rev 0; 6/03

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

DESIGNATION

C2, C7, C8, C9

C4, C5

C10

QTY

________________________________________________________________ Maxim Integrated Products

Capacitors (0603), not installed

10µF ±10%, 6.3V X5R ceramic

capacitor (1206)

TDK C3216X5R0J106K-0.85

4.7µF ±10%, 10V X5R ceramic

capacitors (1210)

TDK C3225X5R1A475K-1.15

220pF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H221K

0.033µF ±10%, 25V X7R ceramic

capacitor (0603)

TDK C1608X7R1E333K

General Description

Component List

DESCRIPTION

MAX1543 Evaluation Kit

o +2.6V to +5.5V Input Range

o Output Voltages

o Resistor-Adjustable Switching Regulator and

o Logic-Controlled, High-Voltage Switch with

o Greater than 85% Efficiency (Step-Up Switching

o Selectable 600kHz/1.2MHz Step-Up Switching

o Low-Profile Surface-Mount Components

o Also Evaluates the MAX1542 (IC Replacement

o Fully Assembled and Tested

The MAX1543 EV kit is fully assembled and tested.

Follow these steps to verify board operation. Do not

turn on the power supply until all connections are

completed.

• +2.6V to +5.5V, 2A DC power supply

• Voltmeter

1) Verify there is no shunt across jumper JU1.

2) Verify there is a shunt installed across jumper JU2.

3) Connect the positive terminal of the power supply to

4) Turn on the power supply and verify the step-up

MAX1543EVKIT

Op-Amp Output Voltages

Adjustable Delay

Regulator)

Frequency

Required)

the VIN pad. Connect the negative terminal of the

power supply to the GND pad.

switching regulator output (VMAIN) is +8V.

+8V Output at 300mA (3V Input Step-Up

Switching Regulator)

+22V Output at 20mA (Positive Charge Pump)

-7V Output at 20mA (Negative Charge Pump)

+4V Output at ±150mA (Operational Amplifiers

VOUT1 and VOUT2)

PART

TEMP RANGE

0°C to +70°C

Recommended Equipment

Ordering Information

IC PACKAGE

20 TQFN

(5mm x 5mm x 0.8mm)

Quick Start

Features

Procedure

Related parts for MAX1543EVKIT

MAX1543EVKIT Summary of contents

Page 1

... Also Evaluates the MAX1542 (IC Replacement Required) o Fully Assembled and Tested Ordering Information PART TEMP RANGE MAX1543EVKIT 0°C to +70°C The MAX1543 EV kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed. ...

Page 2

MAX1543 Evaluation Kit DESIGNATION QTY DESCRIPTION 0.1µF ±10%, 50V X7R ceramic C11–C16, 8 capacitors (0603) C18, C19 TDK C1608X7R1H104K 100µF ±20%, 16V aluminum C17 1 electrolytic capacitor (6.3mm x 5mm) Sanyo 16MV100UAX 1A, 30V Schottky diode (S-flat Toshiba ...

Page 3

The startup delay time is set with an external capacitor at the DEL pin. Refer to the Delay Control Circuit section in the MAX1543 data sheet for information ...

Page 4

MAX1543 Evaluation Kit GOFF -7V 1 C12 GND 0.1µF VIN +2.5V TO +5.5V C17 C3 R7 GND 100µF 10µF 100kΩ 16V 6.3V JU1 C7 R9 OPEN 100kΩ C6 220pF GON 0.1µF COM DRN CTL R17 SHORT GND (PC TRACE) Figure ...

Page 5

Figure 2. MAX1543 EV Kit Component Placement Guide— Component Side Figure 4. MAX1543 EV Kit PC Board Layout—GND Layer 2 _______________________________________________________________________________________ MAX1543 Evaluation Kit Figure 3. MAX1543 EV Kit PC Board Layout—Component Side Figure 5. MAX1543 EV Kit PC Board ...

Page 6

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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