MAX1889EVKIT Maxim Integrated Products, MAX1889EVKIT Datasheet

MAX1889EVKIT

Manufacturer Part Number

MAX1889EVKIT

Description

Power Management Modules & Development Tools MAX1889 EVAL KIT MAX1889 EVAL KIT

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1889EVKIT.pdf (8 pages)

Specifications of MAX1889EVKIT

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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The MAX1889 evaluation kit (EV kit) is a fully assembled

and tested surface-mount circuit board that contains a

step-up switching regulator, a positive three-stage

charge-pump and high-voltage positive linear-regulator

controller, and a negative three-stage charge-pump

and high-voltage negative linear-regulator controller.

The step-up switching circuit is configured for a 9V out-

put and provides up to 200mA from a DC supply volt-

age of 2.7V to 5.5V.

The positive charge-pump and linear regulator are config-

ured for a 20V output using two charge-pump stages pro-

viding up to 10mA. The negative charge pump and linear

regulator are configured for a -7V output using a single

charge-pump stage providing up to 10mA. Power for the

positive charge-pump input can be provided by the DC

input source or the step-up switching regulator output.

Power for the negative charge-pump input can be provid-

ed by the DC input source or the power ground.

The MAX1889 EV kit demonstrates low quiescent cur-

rent and high efficiency (up to 90%) for maximum bat-

tery life. The EV kit features overload protection for the

input and all outputs. Operation at 1MHz allows the use

of tiny surface-mount components. The MAX1889 QFN

package (1.0mm max) with low-profile external compo-

nents allows this circuit to be 1.25mm high.

19-2518; Rev 2; 9/02

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 QTY

C4, C5, C6

C2, C3

________________________________________________________________ Maxim Integrated Products

0.47µF ±10%, 16V X7R

ceramic capacitor (0805)

Taiyo Yuden EMK212BJ474KD

3.3µF ±20%, 6.3V X5R

ceramic capacitors (0805)

Taiyo Yuden JMK212BJ335MG

4.7µF ±20%, 10V X7R

ceramic capacitors (1210)

Taiyo Yuden LMK325BJ475MF

0.01µF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H103K

General Description

DESCRIPTION

MAX1889 Evaluation Kit

o 2.7V to 5.5V Input Range

o Output Voltages

o Resistor-Adjustable Outputs

o Up to Three Positive and Three Negative Charge-

o Up to +28V and -22V Linear-Regulated Output

o 90% Efficiency

o 500kHz/1MHz Step-Up Switching Frequency

o Overcurrent Protection

o Low Profile

o Surface-Mount Components

o Fully Assembled and Tested

DESIGNATION QTY

C10–C14, C17,

MAX1889EVKIT

Pump Stages

(As Configured)

C18, C19,

C21, C22

C15, C20

9V Output at 200mA (Step-Up Switching)

20V Output >10mA (Positive Charge-Pump

Regulator)

-7V Output >10mA (Negative Charge-Pump

Regulator)

PART

TEMP RANGE

0°C to +70°C

220pF ±10%, 50V COG

ceramic capacitor (0603)

TDK C1608COG1H221K

0.22µF ±10%, 10V X7R

ceramic capacitor (0603)

Taiyo Yuden LMK107BJ224KA

0.1µF ±10%, 50V X7R

ceramic capacitors (0805)

Taiyo Yuden UMK212BJ104KG

0.15µF ±10%, 50V X7R

ceramic capacitors (1206)

Taiyo Yuden UMK316BJ154KF

Ordering Information

Component List

DESCRIPTION

IC PACKAGE

16 QFN 5mm x 5mm

Features

Related parts for MAX1889EVKIT

MAX1889EVKIT Summary of contents

Page 1

... Efficiency o 500kHz/1MHz Step-Up Switching Frequency o Overcurrent Protection o Low Profile o Surface-Mount Components o Fully Assembled and Tested Ordering Information PART TEMP RANGE MAX1889EVKIT 0°C to +70°C Component List DESIGNATION QTY 220pF ±10%, 50V COG C8 1 ceramic capacitor (0603) TDK C1608COG1H221K 0.22µF ±10%, 10V X7R ...

Page 2

MAX1889 Evaluation Kit DESIGNATION QTY DESCRIPTION 1µF ±10%, 25V X7R C16, C23 2 ceramic capacitors (0805) TDK C2012X7R1E105K 1000pF ±10%, 50V X7R ceramic capacitors (0603) C24, C26, C28 3 TDK C1608X7R1H102K 100µF ±20%, 16V aluminum C25 1 electrolytic capacitor (6.3mm ...

Page 3

Recommended Equipment • 2.7V to 5.5V power supply • One voltmeter The MAX1889 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 ...

Page 4

MAX1889 Evaluation Kit Table 1. JU1 Functions SHUNT SHDN PIN MAX1889 EV KIT OUTPUT LOCATION Connected Installed Shutdown mode to PGND Connected to IN None MAX1889 enabled through R3 External controller Logic high (IN) = enabled, None connected logic low ...

Page 5

Table 5. JU6 Functions THIRD STAGE SHUNT POSITIVE CHARGE LOCATION PUMP 1-2 Connected to VBST Connected to 1-3 previous stage (Default) charge-pump output 1-4 Connected to INPUT Table 7. JU4 Functions SECOND STAGE SHUNT NEGATIVE CHARGE LOCATION PUMP First stage ...

Page 6

MAX1889 Evaluation Kit INPUT C2 C3 3.3µF PGND 3.3µF 6.3V 6. C24 8 5 1000pF C30 3 51.1kΩ 2 100pF 1% PIN R2 C25 150kΩ 100µF 1% R15 16V 10Ω ...

Page 7

LX C10 C11 0.1µF 0.1µ INPUT 1 C13 2 0.1µF JU3 3 INPUT JU4 3 JU5 VNL 3 C16 R10 PGND ...

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 © 2002 Maxim Integrated Products Figure 3. MAX1889 EV Kit Component Placement Guide— ...

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