MAX8758EVKIT Maxim Integrated Products, MAX8758EVKIT Datasheet

MAX8758EVKIT

Manufacturer Part Number

MAX8758EVKIT

Description

Display Modules & Development Tools MAX8758 KIT MAX8758 KIT

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX8758EVKIT.pdf (8 pages)

Specifications of MAX8758EVKIT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Current page: 1 of 8
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The MAX8758 evaluation kit (EV kit) is a fully assembled

and tested surface-mount PC board that provides the

voltages and features required for active-matrix, thin-film

transistor (TFT), liquid-crystal display (LCD) applica-

tions. 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. The included high-speed oper-

ational amplifier can be used to drive the LCD back-

plane (VCOM) or the gamma-correction divider string,

and a logic-controlled, high-voltage switch with

adjustable delay.

The EV kit operates from a +2.2V to +5.5V DC supply

voltage. The step-up switching regulator is configured

for a +8.5V output, providing at least 330mA from 3.0V.

The positive charge pump is configured for a +23V out-

put providing at least 20mA. The negative charge pump

is configured for a -8V output providing at least 20mA.

The high-speed operational amplifier is configured for

+4.25V, capable of providing up to ±150mA peak. The

high-voltage switch can be used to delay the output of

the positive charge pump’s startup. The delay time is set

with an external capacitor.

The MAX8758 EV kit demonstrates low quiescent cur-

rent and high efficiency for maximum battery life.

Operation at 1.2MHz allows the use of tiny surface-

mount components. The MAX8758 TQFN package

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

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

19-3903; Rev 0; 11/05

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

C3, C4, C5

C14–C20

C6, C10,

C1, C2

C11

QTY

________________________________________________________________ Maxim Integrated Products

4.7µF ±10%, 6.3V X5R ceramic

capacitors (0603)

TDK C1608X5R0J475K

4.7µF ±20%, 10V X5R ceramic

capacitors (1206)

TDK C3216X5R1A475M

0.1µF ±10%, 50V X7R ceramic

capacitors (0603)

TDK C1608X7R1H104K

Not installed capacitor (0603)

Not installed capacitor (1206)

220pF ±5%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H221J

0.22µF ±20%, 16V X5R ceramic

capacitor (0603)

TDK C1608X5R1C224M

General Description

DESCRIPTION

MAX8758 Evaluation Kit

♦ +2.2V to +5.5V Input Range

♦ Output Voltages

♦ Resistor-Adjustable Switching Regulator and

♦ Logic-Controlled, High-Voltage Switch with

♦ Greater Than 85% Efficiency (Step-Up Switching

♦ Selectable 640kHz/1.2MHz Step-Up Switching

♦ Low-Profile, Surface-Mount Components

♦ Fully Assembled and Tested

MAX8758EVKIT

DESIGNATION

Op-Amp Output Voltages

Adjustable Delay

Regulator)

Frequency

PART

+8.5V Output at 330mA (Step-Up Switching

Regulator, 3V Input)

+23V Output at 20mA (Positive Charge Pump)

-8V Output at 20mA (Negative Charge Pump)

+4.25V Output at ±150mA (Operational

Amplifier, VCOM)

C12

C13

C21

C22

C23

QTY

TEMP RANGE

0°C to +70°C

Ordering Information

0.033µF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H333K

0.022µF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H223K

150pF ±5%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H151J

1500pF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H152K

100µF ±20%, 16V aluminum

electrolytic capacitor (6.3mm x 5mm)

Sanyo 16MV100UAX

Component List

DESCRIPTION

IC PACKAGE

24 TQFN

(4mm x 4mm x 0.8mm)

Features

Related parts for MAX8758EVKIT

MAX8758EVKIT Summary of contents

Page 1

... Greater Than 85% Efficiency (Step-Up Switching Regulator) ♦ Selectable 640kHz/1.2MHz Step-Up Switching Frequency ♦ Low-Profile, Surface-Mount Components ♦ Fully Assembled and Tested Ordering Information PART TEMP RANGE MAX8758EVKIT 0°C to +70°C Component List DESIGNATION QTY 0.033µF ±10%, 50V X7R ceramic capacitor (0603) C12 1 TDK C1608X7R1H333K 0.022µ ...

Page 2

MAX8758 Evaluation Kit DESIGNATION QTY DESCRIPTION 47pF ±5%, 50V X7R ceramic capacitor (0603) C24 1 TDK C1608X7R1H470J 1A, 30V Schottky diode (S-flat) Nihon EP10QY03 D1 1 Toshiba CRS02 200mA, 100V dual diodes (SOT23) Fairchild MMBD4148SE D2, D3 (Top ...

Page 3

As configured and with no load on the charge pumps, the step-up switching regulator (VMAIN) generates a +8.5V output and can provide at least 350mA from ...

Page 4

MAX8758 Evaluation Kit discharge resistor through JU5). Table 2 lists the selec- table JU2 and JU4 jumper options. To use an external TTL source to control the high-voltage switch, leave JU2 open and connect the source to the CTL terminal. ...

Page 5

Figure 1. MAX8758 EV Kit Schematic _______________________________________________________________________________________ MAX8758 Evaluation Kit 5 ...

Page 6

MAX8758 Evaluation Kit Figure 2. MAX8758 EV Kit Component Placement Guide— Component Side 6 _______________________________________________________________________________________ Figure 3. MAX8758 EV Kit PC Board Layout—Component Side ...

Page 7

Figure 4. MAX8758 EV Kit PC Board Layout—Layer 2 _______________________________________________________________________________________ MAX8758 Evaluation Kit Figure 5. MAX8758 EV Kit PC Board Layout—Layer 3 7 ...

Page 8

... 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products ...

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