MAX1531EVKIT Datasheet MAX1531EVKIT | P1-P3

General Description

The MAX1531 evaluation kit (EV kit) is a fully assembled

and tested surface-mount circuit board that provides

logic and bias power required for liquid crystal display

(LCD) monitors. The EV kit contains a step-down

switching regulator, a logic-supply linear regulator, a

source-driver-supply linear regulator, a gamma-refer-

ence linear regulator, a two-stage positive charge

pump and linear regulator for the TFT gate-on supply,

and a one-stage negative charge pump and linear reg-

ulator for the TFT gate-off supply. The source-driver

supply, the gamma-reference supply, the gate-on sup-

ply, and the gate-off supply can be sequenced in any

power-up order. The EV kit also includes a MAX1522

step-up switching regulator to provide a higher output

voltage option for the source-driver supply and the

gamma reference.

The EV kit produces the output voltages listed in the

features column using a +10.5V to +24V input voltage

range. The input range can be reduced to +9.5V if the

included MAX1522 step-up regulator circuit is used. If

lower output voltages are acceptable, the input range

can be further reduced to +8V.

The EV kit features undervoltage protection for the

input, overcurrent protection for the step-down switch-

ing regulator, and overload protection for the source-

drive linear regulator. Operation at 500kHz allows the

use of small surface-mount components. The EV kit

also evaluates the MAX1530.

Features

♦ Output Voltages (Input Range = +10.5V to +24V or

+9.5V to +24V Using Included MAX1522 Circuit)

+3.3V Output at 1.5A (Step-Down Switching

Regulator)

+2.5V Output at 500mA (Logic-Supply

Regulator)

+10V Output at 500mA (Source-Driver Supply

Regulator)

+9.7V Output at 50mA (Gamma-Reference

Regulator)

+25V Output at 25mA (Positive Charge Pump

and Linear Regulator)

-9V Output at 50mA (Negative Charge Pump

and Linear Regulator)

♦ +8V to +24V Input Range (Reduced Output

Voltages)

♦ Resistor-Adjustable Outputs

♦ 92% Efficiency (Step-Down Switching Regulator)

♦ 250kHz/500kHz Selectable Step-Down Switching

Frequency

♦ Programmable Power-Up Sequencing

♦ Soft-Start for All Outputs

♦ Multilevel Protection

Resistor-Adjustable Input Undervoltage

Threshold

Output Undervoltage Shutdown

Overcurrent Protection for One Linear

Regulator

Current Limit for the Step-Down Switching

Regulator

♦ External Step-Up Switching Regulator (MAX1522)

Included

♦ Also Evaluates the MAX1530 (IC Replacement

Required)

♦ Low-Profile, Surface-Mount Components

♦ Fully Assembled and Tested

Evaluates: MAX1530/MAX1531

MAX1531 Evaluation Kit

________________________________________________________________ Maxim Integrated Products 1

19-3520; Rev 0; 11/04

Component List

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.

Ordering Information

PART TEMP RANGE IC PACKAGE

MAX1531EVKIT 0°C to +70°C 32 TQFN (5mm x 5mm)

DESIGNATION QTY DESCRIPTION

C1, C4 2

1µF ±10%, 25V X7R ceramic

capacitors (0805)

TDK C2012X7R1E105K

C2, C23 0 Not installed capacitors (0603)

C3 1

4.7µF ±10%, 25V X7R ceramic

capacitor (1210)

TDK C3225X7R1E475K

C5, C6, C8,

C11, C14, C15,

C17, C18, C20

0.1µF ±10%, 50V X7R ceramic

capacitors (0603)

TDK C1608X7R1H104K

C7 1

22µF ±20%, 6.3V X7R ceramic

capacitor (1206)

TDK C3216X7R0J226M

Evaluates: MAX1530/MAX1531

MAX1531 Evaluation Kit

2 _______________________________________________________________________________________

Component List (continued)

DESIGNATION QTY DESCRIPTION

C9 1

10µF ±20%, 6.3V X5R ceramic

capacitor (1206)

TDK C3216X5R0J106M

C10 1

470pF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H471K

C12, C19 2

0.47µF ±10%, 16V X7R ceramic

capacitors (0805)

TDK C2012X7R1C474K

C13, C25 2

4.7µF ±10%, 16V X7R ceramic

capacitors (1206)

TDK C3216X7R1C475K

C16 1

0.47µF ±20%, 50V X7R ceramic

capacitor (1210)

TDK C3225X7R1H474M

C21, C22 2

2.2µF ±10%, 25V X7R ceramic

capacitors (1206)

TDK C3216X7R1E225K

C24 1

10µF ±20%, 25V X5R ceramic

capacitor (1210)

TDK C3225X5R1E106M

C26 1

1µF ±10%, 10V X5R ceramic

capacitor (0603)

TDK C1608X5R1A105K

D1, D6 2

100mA, 30V Schottky diodes (SOD-

523)

Central Semiconductor CMOSH-3

D2 1

1A, 30V Schottky diode (S-flat)

Toshiba CRS02

D3, D4, D5 3

250mA, 100V dual diodes (SOT23)

Central Semiconductor CMPD6001S

D7 1

250mA, 75V high-speed silicon diode

(SOD-523)

Central Semiconductor CMOD4448

JU1,

JU12–JU16

6 3-pin headers

JU2, JU3 2 2-pin headers

JU4–JU7 4 3-way jumpers (4 pins)

JU8–JU11 4 4-way jumpers (5 pins)

DESIGNATION QTY DESCRIPTION

L1 1

10µH, 2.3A

inductor

Sumida CDR7D28MN-100

L2 1

22µH, 0.90A

inductor

Sumida CDRH5D28-220

N1 1

2.5A, 30V dual n-channel MOSFET

(Super SOT-6)

Fairchild Semiconductor FDC6561AN

N2 1

5.2A, 30V n-channel MOSFET (Super

SOT-6)

Fairchild Semiconductor FDC633N

Q1, Q4 2

3A, 60V low-saturation pnp bipolar

transistors

(SOT-223)

Fairchild Semiconductor NZT660A

Q2, Q3 2

200mA, 40V pnp bipolar transistors

(SOT23)

Central Semiconductor CMPT3906

Q5, Q6 2

200mA, 40V npn bipolar transistors

(SOT23)

Central Semiconductor CMPT3904

R1 1 17.8kΩ ±1% resistor (0805)

R2, R23 2 10.7kΩ ±1% resistors (0805)

R3 1 124kΩ ±1% resistor (0805)

R4 1 20.0kΩ ±1% resistor (0805)

R5, R6, R7,

R11

4 100kΩ ±5% resistors (0805)

R8, R17, R24,

R27

4 6.8kΩ ±5% resistors (0805)

R9, R10, R19,

R32

4 10.0kΩ ±1% resistors (0805)

R12 1 301kΩ ±1% resistor (0805)

R13 1 221kΩ ±1% resistor (0805)

R14 1 121kΩ ±1% resistor (0805)

R15, R18 2 68.1kΩ ±1% resistors (0805)

R16 1 43.2kΩ ±1% resistor (0805)

R21 1 1.5kΩ ±5% resistor (0805)

R22 1 75.0kΩ ±1% resistor (0805)

R25 1 200kΩ ±1% resistor (0805)

R26 1 10.5kΩ ±1% resistor (0805)

Quick Start

The MAX1531 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.

The MAX1531 EV kit operates with up to +24V inputs.

However, due to external-component voltage stress limi-

tations, default jumper configurations must be modified

for operation above +13.2V. See the Positive Charge

Pump and Gate-On Linear Regulator Output Voltage

(GON) sections.

Recommended Equipment

• +10.5V to +13.2V, 2A DC power supply

• One voltmeter

1) Verify that a shunt is across pins 1 and 2 of jumpers

JU1, JU10, and JU12.

2) Verify that there are no shunts across jumpers JU2

and JU3.

3) Verify that a shunt is across pins 1 and 3 of jumpers

JU4, JU5, JU6, JU7, and JU8.

4) Verify that a shunt is across pins 1 and 5 of jumper

JU9.

5) Verify that a shunt is across pins 1 and 4 of jumper

JU11.

6) Verify that a shunt is across pins 2 and 3 of jumpers

JU13, JU14, JU15, and JU16.

7) Connect the positive terminal of the input power

supply to the PIN pad. Connect the negative termi-

nal of the input power supply to the PGND pad.

8) Turn on the power supply and verify that the step-

down regulator output (VOUT) is +3.3V.

9) Verify that the internal 5V linear regulator output

(VL) is +5V.

10) Verify that the logic-supply linear regulator output

(VLOG) is +2.5V.

11) Verify that the source-driver-supply linear regulator

output (VSRC) is +10V.

12) Verify that the gamma-reference linear regulator

output (VGAM) is +9.7V.

13) Verify that the gate-on linear regulator output (GON)

is +25V.

14) Verify that the gate-off linear regulator output

(GOFF) is -9V.

For instructions on selecting the feedback resistors for

other output voltages, see the Output Voltage Selection

section.

Detailed Description

The MAX1531 EV kit contains a step-down switching

regulator, a linear regulator for a low-voltage logic sup-

ply, a high-current linear regulator for a source-driver

supply, a linear regulator for a gamma reference, a two-

stage positive charge pump with a positive high-volt-

age linear regulator, and a one-stage negative charge

pump with a negative linear regulator. The EV kit oper-

ates from a +10.5V and +24V DC power supply, which

Evaluates: MAX1530/MAX1531

MAX1531 Evaluation Kit

_______________________________________________________________________________________ 3

Component List (continued)

DESIGNATION QTY DESCRIPTION

R28 1 90.9kΩ ±1% resistor (0805)

R29 1 48.7kΩ ±1% resistor (0805)

R30 1 1Ω ±5% resistor (0805)

R31 1 110kΩ ±1% resistor (0805)

R33 1

0.050Ω ±1% resistor (1206)

IRC LRC-LR 1206-01-R050-F

R34 0 Not installed resistor (0805)

R35, R36 2 1.00Ω ±1% resistors (0805)

R37, R38 2 10Ω ±5% resistors (0805)

R39–R42 4 2.0kΩ ±5% resistors (0805)

U1 1 MAX1531ETJ (32-pin TQFN)

U2 1 MAX1522EUT-T (6-pin SOT23)

None 16 Shunts (see table for jumper settings)

None 1 MAX1531 PC board

Component Suppliers

SUPPLIER PHONE FAX WEBSITE

Central Semiconductor 631-435-1110 631-435-1824 www.centralsemi.com

Fairchild 888-522-5372 — www.fairchildsemi.com

IRC 361-992-7900 361-992-3377 www.irctt.com

Sumida 847-545-6700 847-545-6720 www.sumida.com

TDK 847-803-6100 847-390-4405 www.component.tdk.com

Toshiba 949-455-2000 949-859-3963 www.toshiba.com/taec

Note: Indicate you are using the MAX1530/MAX1531 when contacting these manufacturers.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P13

MAX1531EVKIT

Mfr. #:

Buy MAX1531EVKIT

Manufacturer:

Maxim Integrated

Description:

Power Management IC Development Tools MAX1530/1 Eval Kit

Lifecycle:

New from this manufacturer.

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