SiC521, SiC521A

www.vishay.com

Vishay Siliconix

S15-0170-Rev. B, 09-Feb-15

1

Document Number: 62989

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DESCRIPTION

The SiC521 and SiC521A are integrated power stage

solutions optimized for synchronous buck applications

to offer high current, high efficiency, and high power

density performance. Packaged in Vishay’s proprietary

4.5 mm x 3.5 mm MLP package, SiC521 and SiC521A

enable voltage regulator designs to deliver up to 30 A

continuous current per phase.

The

internal

power

MOSFETs

utilize

Vishay’s

state-of-the-art Gen IV TrenchFET technology that delivers

industry benchmark performance to significantly reduce

switching and conduction losses.

The SiC521 and SiC521A incorporate an advanced

MOSFET gate driver IC that features high current driving

capability, adaptive dead-time control, an integrated

bootstrap Schottky diode, and zero current detect to

improve

light

load

efficiency.

The

drivers

are

also

compatible with a wide range of PWM controllers, support

tri-state PWM, and 3.3 V (SiC521A) / 5 V (SiC521) PWM

logic.

FEATURES

package

• Vishay’s Gen IV MOSFET technology and a

low-side MOSFET with integrated Schottky

diode

• Delivers up to 30 A continuous current, 40 A at 10 ms peak

current

• 95 % peak efficiency

• High frequency operation up to 1.5 MHz

• Power MOSFETs optimized for 12 V input stage

• 3.3 V (SiC521A) / 5 V (SiC521) PWM logic with tri-state and

hold-off

• Zero current detect control for light load efficiency

improvement

• Low PWM propagation delay (< 20 ns)

• Material categorization: for definitions of compliance

APPLICATIONS

• Multi-phase VRDs for CPU, GPU, and memory

• Synchronous buck converters

• DC/DC VR modules

TYPICAL APPLICATION DIAGRAM

Fig. 1 - SiC521 and SiC521A Typical Application Diagram

PWM

controller

Gate

driver

5V

ZCD_EN#

PWM

BOOT

PHASE