LX1736 datasheet(4/7 Pages) MICROSEMI

Part #	LX1736

Description	5V 1.25A 1.0MHz PWM/PFM STEP DOWN REGULATOR

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Manufacturer	MICROSEMI [Microsemi Corporation]

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LX1736

PRODUCTION DATA SHEET

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 4

5V 1.25A 1.0MHz PWM/PFM STEP DOWN REGULATOR

TM

®

Copyright

Rev. 1.1., 11/25/2008

APPLICA T ION SU P P ORT

Cout

Vout

Vin

LX1736

Ground

Cout

DIODE

Vpwr

Vin

n/c

Sw

Gnd

FB

INDUCTOR

Rf

Cin

PCB Layout Considerations

1- Maintain separate traces leading from the decoupling capacitor, CIN, to the supply input pins of the IC for VCC and VPWR. This

ensures that the noise and voltage drops associated with the high dI/dt pulses from the PWM switching are minimized for the

internal control circuitry of the IC.

2-

Diode ground should return to COUT ground with minimum physical distance before joining the IC Ground connection.

3-

Feed back resistor return path to ground should be located closely to the IC Pin 2 to avoid VOUT offsets induced by ground drops

and noise.

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