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General Description

The MAX17075 evaluation kit (EV kit) is a fully assem-

bled and tested surface-mount circuit board that pro-

vides the voltages and features required for active-

matrix thin-film transistor (TFT), liquid-crystal display

(LCD) panels in LCD monitors and LCD TVs. The EV kit

contains a step-up switching regulator, a two-stage pos-

itive charge pump for the TFT gate-on supply, a single-

stage negative charge pump for the TFT gate-off sup-

ply, and a high-current op amp. Also included is a logic-

controlled high-voltage switch array, with capacitor con-

trol delay, for the positive gate-driver supply. A capaci-

tive dummy load is provided at the high-voltage switch

output for ease of testing without an attached panel.

The MAX17075 EV kit is designed to operate from a DC

supply voltage of +2.5V to +5.5V. At +5V (±10%) nomi-

nal input voltage, the step-up switching regulator pro-

vides a +13V output and up to 500mA. The positive

charge pump provides a +30V output and up to 30mA.

The negative charge pump provides a -7V output and

up to 60mA. The high-current op amp provides a +6.5V

output that can source or sink 500mA peak current. The

high-voltage switch array is controlled by external logic.

The MAX17075 switches at 1.2MHz, allowing the use of

tiny surface-mount components. The MAX17075 thin

QFN package (0.8mm maximum height) with low-profile

external components allows this circuit to be less than

3mm high.

Features

♦ +2.5V to +5.5V Input-Voltage Range

♦ Output Voltages (+4.5V to +5.5V Input Voltage)

+13V Output at 500mA (Step-Up Switching

Regulator)

+30V Output at 30mA (Positive Charge Pump)

-7V Output at 60mA (Negative Charge Pump)

High-Current Op Amp (±500mA Peak Current)

♦ 1.2MHz Switching Frequency

♦ All Output Voltages are Resistor Adjustable

♦ Logic-Controlled High-Voltage Switches with

Capacitor Control Delay

♦ Low-Profile Surface-Mount Components

♦ Lead(Pb)-Free and RoHS Compliant

♦ Fully Assembled and Tested

Evaluates: MAX17075

MAX17075 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-4396; Rev 0; 12/08

Component List

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

DESIGNATION QTY DESCRIPTION

C1, C2 2

10µF ±20%, 6.3V X5R ceramic

capacitors (0603)

Murata GRM188R60J106M

TDK C1608X5R0J106M

C3, C4 2

10µF ±20%, 25V X5R ceramic

capacitors (1206)

Murata GRM31CR61E106M

TDK C3216X5R1E106M

C5 1

1µF ±10%, 6.3V X5R ceramic

capacitor (0402)

Murata GRM155R60J105K

TDK C1005X5R0J105K

C6 1

1µF ±10%, 25V X5R ceramic

capacitor (0603)

Murata GRM188R61E105K

TDK C1608X5R1E105K

C7 1

1000pF ±10%, 50V X7R ceramic

capacitor (0805)

Murata GRM216R71H102K

TDK C2012X7R1H102K

DESIGNATION QTY DESCRIPTION

C8 1

0.033µF ±10%, 16V X7R ceramic

capacitor (0603)

Murata GRM188R71C333K

TDK C1608X7R1E333K

C9 1

0.22µF ±10%, 6.3V X5R ceramic

capacitor (0402)

Murata GRM155R60J224K

TDK C1005X5R0J224K

C10, C14 2

1µF ±10%, 50V X7R ceramic

capacitors (1206)

Murata GRM31MR71H105KA

TDK C3216X7R1H105K

C11, C15, C16,

C17

0.1µF ±10%, 50V X7R ceramic

capacitors (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

C12 1

220pF ±10%, 50V X7R ceramic

capacitor (0402)

Murata GRM155R71H221K

TDK C1005X7R1H221K

Ordering Information

PART TYPE

MAX17075EVKIT+ EV Kit

Denotes lead(Pb)-free RoHS compliant.

Summary of content (7 pages)

PAGE 1
9-4396; Rev 0; 12/08 MAX17075 Evaluation Kit The MAX17075 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that provides the voltages and features required for activematrix thin-film transistor (TFT), liquid-crystal display (LCD) panels in LCD monitors and LCD TVs. The EV kit contains a step-up switching regulator, a two-stage positive charge pump for the TFT gate-on supply, a singlestage negative charge pump for the TFT gate-off supply, and a high-current op amp.
PAGE 2
Evaluates: MAX17075 MAX17075 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION 1 0.
PAGE 3
MAX17075 Evaluation Kit 3) Verify that no shunt is installed across jumper JU3 (VGON is not connected to capacitive dummy load C18). 4) Connect the positive terminal of the power supply to the VIN pad on the EV kit. Connect the negative terminal of the power supply to the PGND pad next to the VIN pad. 5) Turn on the power supply and set the supply to +4.5V. 6) Verify that the step-up switching regulator output (AVDD) is +13V. 7) Verify that the gate-on supply (VGON) is +30V.
PAGE 4
Evaluates: MAX17075 MAX17075 Evaluation Kit High-Voltage Switch Control (CTL) Jumper JU2 configures the positions of the highvoltage switch control pin (CTL) of the MAX17075 IC. The CTL pin can be controlled by an external logic controller connected to the EV kit’s CTL pad. Remove the shunt from jumper JU2 before connecting an external controller to the CTL pad. See Table 2 for JU2 shunt positions.
PAGE 5
MAX17075 Evaluation Kit Evaluates: MAX17075 Figure 1.
PAGE 6
Evaluates: MAX17075 MAX17075 Evaluation Kit Figure 2. MAX17075 EV Kit Component Placement Guide— Component Side 6 Figure 3.
PAGE 7
MAX17075 Evaluation Kit Evaluates: MAX17075 Figure 4. MAX17075 EV Kit PCB Layout—Solder Side 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.