MAX8640YELT12(2007-07) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX8640YELT12
(Rev.:2007-07)

Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters

Maxim Integrated 

Tiny 500mA, 4MHz/2MHz Synchronous

Step-Down DC-DC Converters

Ordering Information (continued)

PART*

PIN-

PACKAGE

PKG

CODE

TOP

MARK

MAX8640YELT08+T 6 µDFN-6

L611-1

NB

MAX8640YELT11+T 6 µDFN-6

L611-1

NC

MAX8640YELT12+T 6 µDFN-6

L611-1

ND

MAX8640YELT13+T 6 µDFN-6

L611-1

NE

MAX8640YELT15+T 6 µDFN-6

L611-1

NF

MAX8640YELT16+T 6 µDFN-6

L611-1

NG

MAX8640YELT18+T 6 µDFN-6

L611-1

NH

MAX8640YELT19+T 6 µDFN-6

L611-1

NI

MAX8640YELT25+T 6 µDFN-6

L611-1

NJ

MAX8640ZEXT08+T 6 SC70-6

MAX8640ZEXT11+T 6 SC70-6

X6S-1

X6S-1

ACL

ACM

MAX8640ZEXT12+T 6 SC70-6

X6S-1

ACN

MAX8640ZEXT13+T 6 SC70-6

X6S-1

ACO

MAX8640ZEXT15+T 6 SC70-6

X6S-1

ACP

MAX8640ZEXT18+T 6 SC70-6

X6S-1

ACU

MAX8640ZELT08+T 6 µDFN-6

L611-1

NK

MAX8640ZELT11+T 6 µDFN-6

L611-1

NL

MAX8640ZELT12+T 6 µDFN-6

L611-1

NM

MAX8640ZELT13+T 6 µDFN-6

L611-1

NN

MAX8640ZELT15+T 6 µDFN-6

L611-1

NO

MAX8640ZELT18+T 6 µDFN-6

L611-1

NP

*Contact factory for availability of each version.

+Denotes a lead-free package.

T = Tape and reel.

Note: All devices are specified over the -40°C to +85°C

operating temperature range.

typically perform well. Due to the MAX8640Y/

MAX8640Z soft-start, the input capacitance can be very

low. For optimum noise immunity and low input ripple,

choose a capacitor value in µF that is equal to or larger

than the inductor’s value in µH.

PCB Layout and Routing

High switching frequencies and large peak currents

make PCB layout a very important part of design. Good

design minimizes excessive EMI on the feedback paths

and voltage gradients in the ground plane, both of

which can result in instability or regulation errors.

Connect the inductor, input capacitor, and output

capacitor as close together as possible, and keep their

traces short, direct, and wide. Connect the two GND

pins under the IC and directly to the grounds of the

input and output capacitors. Keep noisy traces, such

as the LX node, as short as possible. Refer to the

MAX8640Z evaluation kit for an example PCB layout

and routing scheme.

PROCESS: BiCMOS

Chip Information

8 _______________________________________________________________________________________

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