MAX1778EVKIT Maxim Integrated Products, MAX1778EVKIT Datasheet

MAX1778EVKIT

Manufacturer Part Number

MAX1778EVKIT

Description

Power Management Modules & Development Tools MAX1778 EVAL KIT MAX1778 EVAL KIT

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1778EVKIT.pdf (6 pages)

Specifications of MAX1778EVKIT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX1778 evaluation kit (EV kit) is a fully assembled

and tested surface-mount circuit board that contains a

step-up switching regulator, two charge-pump voltage-

regulator circuits, a V

linear regulator (LDO). The step-up switching circuit is

configured for a +8V output that provides up to 250mA

of current from a +3.0V supply. The EV kit can be pow-

ered from a +2.7V to +5.5V supply.

The positive charge-pump circuit is configured for a

+20V output that provides more than 10mA of current.

The negative charge-pump circuit is configured for a

-5V output and provides more than 20mA of current.

Power for both charge-pump inputs is provided from

the step-up switching regulator output.

The EV kit also features an LDO linear regulator circuit,

which is configured for a +2.5V output that provides

more than 200mA of current. Power for the LDO regula-

tor circuit is provided from the input supply. The V

buffer provides a +4V output and more than 150mA of

peak current. The step-up switching regulator output

provides power to the V

The MAX1778 EV kit demonstrates low quiescent cur-

rent and high efficiency (over 91%). High-frequency

operation (500kHz/1MHz) allows the use of tiny surface-

mount components and fast transient response. The

MAX1778 TSSOP package (1.1mm max) with low-pro-

file external components allows this circuit to be less

than 1.2mm in height. A built-in transient load tester

facilitates transient load tests. The MAX1778 EV kit can

also be used to evaluate the MAX1880, MAX1881, and

MAX1882 ICs.

19-2063; Rev 0; 6/01

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.

C4, C6, C10, C22

DESIGNATION

C1, C16, C17,

C18, C21

C3, C14

________________________________________________________________ Maxim Integrated Products

QTY

COM

General Description

3.3µF ±10%, 10V X7R ceramic

capacitors (1210)

Taiyo Yuden LMK325BJ335KD

0.47µF ±10%, 10V X7R ceramic

capacitor (0603)

Taiyo Yuden LMK107BJ474KA

0.01µF ±10%, 50V X7R ceramic

capacitors (0603)

Murata GRM39X7R103K050AD

0.1µF ±20%, 16V X7R ceramic

capacitors (0603)

Taiyo Yuden EMK107BJ104MA

buffer, and a low-drop out

buffer.

DESCRIPTION

COM

MAX1778 Evaluation Kit

o +2.7V to +5.5V Input Range

o Output Voltages

o All Outputs Are Adjustable with Resistors

o >91% Efficiency

o Internal MOSFET Switches

o <1µA (typ) IC Shutdown Current

o 1MHz Step-Up Switching Regulator Frequency

o 500kHz Charge-Pump Regulator Switching

o Adjustable Fault-Trip Level

o Low-Profile External Components

o Built-In Transient Load Tester

o Surface-Mount Components

o Fully Assembled and Tested

MAX1778EVKIT

Frequency

DESIGNATION

C13, C25−C29

C12, C20, C24

C5, C7, C11,

+8V, >200mA (Step-Up Switching Regulator)

+20V, >10mA (Positive Charge-Pump Regulator)

-5V, >20mA (Negative Charge-Pump Regulator)

+2.5V, >200mA (LDO Linear Regulator)

+4V, >150mA Peak (V

PART

QTY

TEMP. RANGE

Ordering Information

0°C to +70°C

COM

1µF ±10%, 16V X7R ceramic

capacitors (1206)

Murata GRM42-6X7R105K016

1000pF ±10%, 50V X7R

ceramic capacitor (0603)

Murata GRM39X7R102K050AD

0.22µF ±10%, 10V X7R ceramic

capacitor (0603)

Taiyo Yuden LMK107BJ224KA

Not installed (0603)

Component List

Buffer)

DESCRIPTION

24 TSSOP

IC PACKAGE

Features

Related parts for MAX1778EVKIT

MAX1778EVKIT Summary of contents

Page 1

... Step-Up Switching Regulator Frequency o 500kHz Charge-Pump Regulator Switching Frequency COM o Adjustable Fault-Trip Level o Low-Profile External Components o Built-In Transient Load Tester o Surface-Mount Components o Fully Assembled and Tested PART MAX1778EVKIT DESCRIPTION DESIGNATION C5, C7, C11, C13, C25−C29 C12, C20, C24 Features Buffer) COM Ordering Information TEMP ...

Page 2

MAX1778 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION 470pF ±5%, 50V COH ceramic C19 1 capacitor (0603) Taiyo Yuden UMK107CH4715Z 3A, 30V Schottky diode (M-flat Toshiba CMS02 200mA, 25V Schottky diodes D2, D3 (SOT23) Fairchild ...

Page 3

The positive charge-pump circuit can be reconfigured to provide up to +35V by changing feedback resistors, provided that the step-up switching regulator (V1) has been changed to a higher voltage. The negative charge-pump circuit can also be reconfigured to pro- ...

Page 4

MAX1778 Evaluation Kit age divider. Select different external voltage-divider resis- tors (R10, R11) to generate output voltages other than +4V (+1.2V to +(V - 1.2V)). Refer to the Output Voltage SUPB Selection section in the MAX1778/MAX1880–MAX1885 data sheet for instructions ...

Page 5

Figure 1. MAX1778 EV Kit Schematic _______________________________________________________________________________________ MAX1778 Evaluation Kit 5 ...

Page 6

... 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. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products 1.0" ...

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