RT9612A Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – Synchronous-Rectified Buck MOSFET Driver

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RT9612A/B
Synchronous-Rectified Buck MOSFET Driver
General Description
The RT9612A/B is a high frequency, synchronous rectified,
single phase dual MOSFET driver designed to adapt from
normal MOSFET driving applications to high performance
CPU VR driving capabilities.
The RT9612A/B can be utilized under both V_CC = 5V or
V_CC = 12V applications. The RT9612A/B also builds in an
internal power switch to replace external boot strap diode.
The RT9612A/B can support switching frequency efficiently
up to 500kHz. The RT9612A/B has the UGATE driving
circuit and the LGATE driving circuit for synchronous
rectified DC/DC converter applications. The driving rise/
fall time capability is designed within 30ns and the shoot
through protection mechanism is designed to prevent shoot
through of high side and low side power MOSFETs. The
RT9612A/B has PWM tri-state shut down function which
can force driver output into high impedance.
The difference of the RT9612A and the RT9612B is the
propagation delay, t_UGATEpdh. The RT9612B has
comparatively large t_UGATEpdh than RT9612B. Hence, the
RT9612A is usually recommended to be utilized in
performance oriented applications, such as high power
density CPU VR or GPU VR. The RT9612A/B comes in a
small footprint with SOP-8, SOP-8 (Exposed Pad) and
WDFN-8EL 3x3.
Features
Drive Two N-MOSFETs
Adaptive Shoot Through Protection
Embedded Bootstrap Diode
Support High Switching Frequency
Fast Output Rise Time
Tri-State Input for Bridge Shutdown
Small SOP-8, SOP-8 (Exposed Pad) and 8-Lead
WDFN Packages
RoHS Compliant and Halogen Free
Applications
Core Voltage Supplies for Desktop, Motherboard CPU
High Frequency Low Profile DC/DC Converters
High Current Low Voltage DC/DC Converters
Ordering Information
RT9612A/B
Package Type
S : SOP-8
SP : SOP-8 (Exposed Pad-Option1)
QW : WDFN-8EL 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note :
Long Dead Time
Short Dead Time
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
DS9612A/B-03 June 2012
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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