MAX1677EVKIT Maxim Integrated, MAX1677EVKIT Datasheet

MAX1677EVKIT

Manufacturer Part Number

MAX1677EVKIT

Description

Power Management IC Development Tools Evaluation Kit for the MAX1677

Manufacturer

Maxim Integrated

Series

MAX1677r

Datasheet

1.MAX1677EVKIT.pdf (8 pages)

Specifications of MAX1677EVKIT

Output Voltage

3.3 V, +/- 28 V

Output Current

350 mA

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The MAX1677 evaluation kit (EV kit) is a fully assembled

and tested surface-mount circuit board that contains

two separate switching-regulator circuits. The first cir-

cuit is configured for a +3.3V main output and +20V

LCD bias voltage. It accepts inputs from +0.7V to

+3.3V. The main +3.3V output supplies up to 350mA

from a 2-cell input, or 140mA from a 1-cell input, while

the LCD bias output supplies up to 12mA at +20V.

The second circuit converts a +0.7V to +3.3V battery

voltage to a +3.3V main output and a -20V LCD bias

voltage. The main +3.3V output supplies up to 350mA

from a 2-cell input, or 140mA from a 1-cell input, while

the LCD bias output supplies 10mA at -20V.

The MAX1677 features internal N-channel MOSFET

switches, a synchronous rectifier, low-battery compara-

tor, and selectable PFM/PWM mode. The MAX1677 EV

kit provides low quiescent current and high efficiency—

up to 95% for maximum battery life. Operation at

300kHz allows the use of tiny surface-mount inductors.

19-1403; Rev 1; 8/99

For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,

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

DESIGNATION

C1, C2, C10,

C3, C5, C13,

C6, C7, C9,

D2, D4, D5

C16, C17

C4, C12

C15, D6

D1, D3

C11

C14

QTY

________________________________________________________________ Maxim Integrated Products

100µF, 10V low-ESR tantalum caps

AVX TPSD107M010R0100 or

Sprague 593D107X0010D2T

0.1µF ceramic capacitors

4.7µF, 35V tantalum capacitors

AVX TPSC475M035R0600 or

Sprague 595D475X0035C2T

2.2µF, 25V ceramic capacitor

United Chemi-Con/Marcon

THCR30E1E225Z

1µF, 16V ceramic capacitors

Taiyo Yuden EMK316BJ105KL

TDK C3216X7R1C105M

Not installed

20V, 0.5A Schottky diodes

Motorola MBR0520LT3

40V, 0.5A Schottky diodes

Motorola MBR0540T3

General Description

DESCRIPTION

MAX1677 Evaluation Kit

o +0.7V to MAIN

o Dual Output Voltages

o All Outputs Also Adjustable with External

o Up to 350mA from 2-Cell Input (Main Output )

o Up to 140mA from 1-Cell Input (Main Output)

o Up to 12mA Output Current (LCD Bias Output)

o Internal N-Channel Switches and Synchronous

o 1µA IC Shutdown Current

o 300kHz Switching Frequency

o Surface-Mount Components

o Fully Assembled and Tested

DESIGNATION

Resistors

Rectifier

MAX1677EVKIT

R14–R16

JU1–JU6

R6–R10,

R4, R12

R5, R13

R1, R2,

U1, U2

L1, L3

L2, L4

None

+3.3V Main Output and +20V LCD Bias Output

+3.3V Main Output and -20V LCD Bias Output

R11

PART

QTY

OUT

TEMP. RANGE

10µH inductors

Sumida CR54-100

10µH inductors

Murata LQH4N100K04

TDK NLC32522T-100K

1.5MΩ ±5% resistor

100kΩ ±5% resistors

10Ω ±5% resistors

1.6MΩ ±5% resistor

Not installed

MAX1677EEE

3-pin headers

Shunts

MAX1677 PC board

MAX1677 data sheet

Battery Input Voltage

Ordering Information

0°C to +70°C

Component List

DESCRIPTION

16 QSOP

IC PACKAGE

Features

Related parts for MAX1677EVKIT

MAX1677EVKIT Summary of contents

Page 1

... Up to 12mA Output Current (LCD Bias Output) o Internal N-Channel Switches and Synchronous Rectifier o 1µA IC Shutdown Current o 300kHz Switching Frequency o Surface-Mount Components o Fully Assembled and Tested Ordering Information PART TEMP. RANGE MAX1677EVKIT 0°C to +70°C Component List DESIGNATION QTY 10µH inductors L1 Sumida CR54-100 10µH inductors ...

Page 2

MAX1677 Evaluation Kit Component Suppliers SUPPLIER PHONE AVX 803-946-0690 Dale-Vishay 402-564-3131 Motorola 602-303-5454 Murata 814-237-1431 Sprague 603-224-1961 Sumida 708-956-0666 Taiyo Yuden 408-573-4150 TDK 847-390-4373 United Chemi- 847-696-2000 Con/Marcon Note: Please indicate that you are using the MAX1677 when contacting these ...

Page 3

The main boost converter has three operational modes: a low-power PFM mode; a high-power, low-noise PWM mode; and a high-power PWM mode with the internal oscillator synchronized to an external clock. The EV kit operates at 300kHz switching frequency and ...

Page 4

MAX1677 Evaluation Kit Figure 1. MAX1677 EV Kit Schematic (Positive LCD) 4 _______________________________________________________________________________________ ...

Page 5

Figure 2. MAX1677 EV Kit Schematic (Negative LCD) _______________________________________________________________________________________ MAX1677 Evaluation Kit 5 ...

Page 6

MAX1677 Evaluation Kit 1.0" Figure 3. MAX1677 EV Kit Component Placement Guide—Component Side 6 _______________________________________________________________________________________ ...

Page 7

Figure 4. MAX1677 EV Kit PC Board Layout—Component Side _______________________________________________________________________________________ MAX1677 Evaluation Kit 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 © 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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