SP6134 データシートの表示（PDF） - Exar Corporation

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SP6134

600kHz Synchronous PWM Step Down Controller

Exar Corporation 

January 2009

SP6134

600kHz Synchronous PWM Step Down Controller

Rev. 2.0.0

GENERAL DESCRIPTION

The SP6134 is a 600kHz constant frequency,

voltage mode, synchronous PWM step down

controller optimized for high efficiency.

The SP6134 is adequately suited for split plane

applications utilizing a low power 5V rail to

power the controller circuitry, minimizing

power dissipation. Its wide input voltage range

of 3V to 15V allows for conversions from the

standard 3.3V, 5V, 9.6V and 12V power rails

to an output voltage adjustable down to 0.8V.

Developed around a wide bandwidth internal

amplifier, the SP6134 can accommodate type

II and type III compensation schemes.

Protection features include a programmable

UVLO, thermal shutdown and output short

circuit protection.

The SP6134 is part of a larger family of step

down controllers operating at various

switching frequencies up to 1300kHz and input

voltages up to 28V. Refer to Exar’s SP6134H,

SP6132, SP6132H, SP6137 and SP6139 for

complete details.

The SP6134 is available in lead free, RoHS

compliant, space saving 10-pin MSOP

package.

APPLICATIONS

• 12V DPA

• Communications Systems

• Graphics Cards

FEATURES

• 3V to 15V Step Down Achieved Using

Dual Input

• On-Board 1.5Ω sink (2Ω source) NFET

Drivers

• Up to 15A Output Capability

• UVLO Detects Both VCC and VIN

• Short-Circuit Protection with Auto-

Restart

• Supports Type II or III Compensation

• Programmable Soft Start

• Fast Transient Response

• High Efficiency: Greater than 94%

• Non-synchronous Start-Up

• Small 10-Pin MSOP Package

• U.S. Patent #6,922,041

TYPICAL APPLICATION DIAGRAM

Fig. 1: SP6134 Application Diagram

Exar Corporation

48720 Kato Road, Fremont CA 94538, USA

www.exar.com

Tel. +1 510 668-7000 – Fax. +1 510 668-7001

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