MAX17499 查看數據表（PDF） - Maxim Integrated

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MAX17499

Current-Mode PWM Controllers with Programmable Switching Frequency

Maxim Integrated 

Current-Mode PWM Controllers with

Programmable Switching Frequency

Functional Diagram

IN

IN

CLAMP

26.1V

DIGITAL

SOFT-START

REFERENCE

1.23V

UVLO/EN

COMP

FB

CS

1.23V

1.17V

ERROR

AMP

1.4V

CPWM

21.6V

9.74V

UVLO

BOOTSTRAP UVLO

*

210μs

DELAY

IN

VCC

REGULATOR

REG_OK VL

(INTERNAL 5.25V

SUPPLY)

OSCILLATOR

S

Q

R

DRIVER

VCS

1V

ILIM

MAX17499

MAX17500

VCC

UFLG

N

NDRV

GND

RT

*MAX17500 ONLY

Selector Guide

PART*

BOOTSTRAP STARTUP MAX DUTY

UVLO

VOLTAGE (V) CYCLE (%)

MAX17499A

No

9.5

50

MAX17499B

No

9.5

75

MAX17500A

Yes

22

50

MAX17500B

Yes

22

75

*The MAX17499 does not have an internal bootstrap UVLO. The

MAX17499 starts operation as long as VIN is higher than 9.5V

and UVLO/EN is higher than 1.23V.

PROCESS: BiCMOS

Chip Information

Package Information

For the latest package outline information and land patterns

(footprints), go to www.maxim-ic.com/packages. Note that a

“+”, “#”, or “-” in the package code indicates RoHS status only.

Package drawings may show a different suffix character, but

the drawing pertains to the package regardless of RoHS status.

PACKAGE

TYPE

10 μMAX

PACKAGE

CODE

U10+2

OUTLINE

LAND

NO. PATTERN NO.

21-0061

90-0330

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