MAX8563EEE+【PDF 1/15 页】IC REG CTRLR TRPL POS ADJ 16QSOP

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General Description

The MAX8563/MAX8564/MAX8564A ultra-low-output dual

and triple LDO controllers allow flexible and inexpensive

point-of-load voltage conversion in motherboards,

desknotes, notebooks, and other applications.

These parts feature a 0.5V reference voltage with ?%

accuracy providing tight regulation of the output volt-

age. The MAX8563 has three n-channel MOSFET con-

troller outputs, and the MAX8564/MAX8564A has two

controller outputs.

Each controller output is adjustable from 0.5V to 3.3V

when V

= 12V and between 0.5V and 1.8V when V

= 5V. Each output is independently enabled and asserts

a POK signal when the output reaches 94% of the set

value. Each output is protected against a soft short-circuit

condition by an undervoltage comparator that disables

the output when it drops to under 80% of the set voltage

for more than 50祍. For a catastrophic short condition, the

regulators are shut down immediately if the output drops

below 60% of the set voltage.

The MAX8563 is available in a 16-pin QSOP

package, and the MAX8564/MAX8564A are available

in a 10-pin 礛AX

?/DIV>

package.

Applications

Features

f MAX8563: 3 Outputs

f MAX8564/MAX8564A: 2 Outputs

f ?/SPAN>1% Feedback Regulation

f Adjustable Output Voltage Down to 0.5V

f Can Use Ceramic Output Capacitors

f Wide Supply Voltage Range Permits Operation

from 5V or 12V Rails

f Individual Enable Control and POK Signal Allows

Sequencing

f Overload Protection Against Soft Short-Circuit

Condition

f Undervoltage Short-Circuit Protection

f Drive n-Channel MOSFETs

?%, Ultra-Low Output Voltage, Dual and Triple

Linear n-FET Controllers

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

19-3290; Rev 2; 6/06

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxims website at www.maxim-ic.com.

PART

TEMP RAN E

PIN-

PACKAGE

PKG

CODE

MAX8563EEE

-40癈 to +85癈 16 QSOP

E16-1

MAX8564EUB

-40癈 to +85癈 10 礛AX

U10-2

MAX8564AEUB+ -40?/SPAN>C to +85?/SPAN>C 10 MAX

U10-2

OFF

DRV1

FB1

EN1

POK1

GND

N.C.

DRV3

FB3

DRV2

FB2

EN2

POK2

N.C.

POK3

EN3

MAX8563

1.8V ?% IN

OUT1

1.5V/1.5A

POK1

3.3V ?% IN

OUT3

2.5V/2A*

C10

OUT2

1.05V/3A

POK2

POK3

5V OR 12VIN

1.2V ?% IN

*2.5V OUTPUT ONLY WITH V

= 12V

Typical Operating Circuit

Pin Configurations appear at end of data sheet.

礛AX is a registered trademark of Maxim Integrated Products, Inc.

+Denotes lead-free package.

Motherboards

Dual/Triple Power Supplies

Desknotes and Notebooks

Graphic Cards

Ultra-Low-Dropout

Voltage Regulators

Low-Voltage DSP, 礟, and

Microcontroller Power

Supplies

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