MAX1531EVKIT Maxim Integrated Products, MAX1531EVKIT Datasheet

MAX1531EVKIT

Manufacturer Part Number

MAX1531EVKIT

Description

Power Management Modules & Development Tools MAX1531 EVAL KIT MAX1531 EVAL KIT

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1531EVKIT.pdf (13 pages)

Specifications of MAX1531EVKIT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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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.

19-3520; Rev 0; 11/04

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

C11, C14, C15,

C17, C18, C20

C5, C6, C8,

C2, C23

C1, C4

QTY

________________________________________________________________ Maxim Integrated Products

1µF ±10%, 25V X7R ceramic

capacitors (0805)

TDK C2012X7R1E105K

Not installed capacitors (0603)

4.7µF ±10%, 25V X7R ceramic

capacitor (1210)

TDK C3225X7R1E475K

0.1µF ±10%, 50V X7R ceramic

capacitors (0603)

TDK C1608X7R1H104K

22µF ±20%, 6.3V X7R ceramic

capacitor (1206)

TDK C3216X7R0J226M

General Description

Component List

DESCRIPTION

MAX1531 Evaluation Kit

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

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

♦ Resistor-Adjustable Outputs

♦ 92% Efficiency (Step-Down Switching Regulator)

♦ 250kHz/500kHz Selectable Step-Down Switching

♦ Programmable Power-Up Sequencing

♦ Soft-Start for All Outputs

♦ Multilevel Protection

♦ External Step-Up Switching Regulator (MAX1522)

♦ Also Evaluates the MAX1530 (IC Replacement

♦ Low-Profile, Surface-Mount Components

♦ Fully Assembled and Tested

MAX1531EVKIT

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

Voltages)

Frequency

Included

Required)

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

+2.5V Output at 500mA (Logic-Supply

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

+9.7V Output at 50mA (Gamma-Reference

+25V Output at 25mA (Positive Charge Pump

-9V Output at 50mA (Negative Charge Pump

Resistor-Adjustable Input Undervoltage

Output Undervoltage Shutdown

Overcurrent Protection for One Linear

Current Limit for the Step-Down Switching

PART

Regulator)

and Linear Regulator)

Threshold

Regulator

TEMP RANGE

0°C to +70°C

Ordering Information

32 TQFN (5mm x 5mm)

IC PACKAGE

Features

Related parts for MAX1531EVKIT

MAX1531EVKIT Summary of contents

Page 1

... 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 Ordering Information PART TEMP RANGE MAX1531EVKIT 0°C to +70°C Features IC PACKAGE 32 TQFN (5mm x 5mm) 1 ...

Page 2

MAX1531 Evaluation Kit DESIGNATION QTY DESCRIPTION 10µF ±20%, 6.3V X5R ceramic C9 1 capacitor (1206) TDK C3216X5R0J106M 470pF ±10%, 50V X7R ceramic capacitor (0603) C10 1 TDK C1608X7R1H471K 0.47µF ±10%, 16V X7R ceramic C12, C19 2 capacitors (0805) TDK C2012X7R1C474K ...

Page 3

Component List (continued) DESIGNATION QTY DESCRIPTION 90.9kΩ ±1% resistor (0805) R28 1 48.7kΩ ±1% resistor (0805) R29 1 1Ω ±5% resistor (0805) R30 1 110kΩ ±1% resistor (0805) R31 1 0.050Ω ±1% resistor (1206) R33 1 IRC LRC-LR 1206-01-R050-F R34 ...

Page 4

MAX1531 Evaluation Kit can provide at least 2A. The step-down switching regu- lator’s switching frequency is jumper configurable between 250kHz and 500kHz. The adjustable input undervoltage protection (EN) protects the EV kit from undervoltage conditions. The step-up switching regula- tor ...

Page 5

Table 2. Jumper JU2 Functions SHUNT FREQ PIN LOCATION Installed Connected to GND None Connected to VL (Default) through R5 Power-Up Sequencing (SEQ) The EV kit features adjustable power-up sequencing for several of the linear regulators. After the MAX1531’s EN ...

Page 6

MAX1531 Evaluation Kit Table 5. ONL3 Setting (JU5 and JU9) JU5 SHUNT JU9 SHUNT LOCATION LOCATION 1-2 Don’t Care 1-4 Don’t Care 1-2 1-3 1-3 (Default) 1-4 1-5 (Default) Table 6. ONL4 Setting (JU6 and JU10) JU6 SHUNT JU10 SHUNT ...

Page 7

Table 7. ONL5 Setting (JU7 and JU11) JU7 SHUNT JU11 SHUNT LOCATION LOCATION 1-2 Don’t Care 1-4 Don’t Care 1-2 1-3 1-3 (Default) 1-4 (Default) 1-5 Positive Charge Pump The positive charge pump of the MAX1531 EV kit pow- ers ...

Page 8

MAX1531 Evaluation Kit VGAM Power Supply The power supply for the VGAM linear regulator can be connected to PIN or STEP_UP. PIN is the input voltage for the EV kit. STEP_UP is the output of the MAX1522 step-up switching regulator ...

Page 9

Gate-On Linear Regulator Output The MAX1531 EV kit’s gate-on linear regulator output (GON) is set to +25V by feedback resistors R25 and R26. To generate output voltages other than +25V (from +1.24V up to the linear regulator’s input, which is ...

Page 10

MAX1531 Evaluation Kit Figure 1. MAX1531 EV Kit Schematic—Sheet ______________________________________________________________________________________ ...

Page 11

JU16 Figure 2. MAX1531 EV Kit Schematic—Sheet ______________________________________________________________________________________ MAX1531 Evaluation Kit PIN C25 4.7µF VOUT C26 L2 1µF 22µ SET EXT U2 4 ...

Page 12

MAX1531 Evaluation Kit Figure 3. MAX1531 EV Kit Component Placement Guide— Component Side Figure 5. MAX1531 EV Kit PC Board Layout—GND Layer 2 12 ______________________________________________________________________________________ Figure 4. MAX1531 EV Kit PC Board Layout—Component Side Figure 6. MAX1531 EV Kit PC ...

Page 13

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 13 © 2004 Maxim Integrated Products ...

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