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RT9612B PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 RT9612B
기능 Synchronous-Rectified Buck MOSFET Driver
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RT9612B 데이터시트, 핀배열, 회로
®
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 VCC = 5V or
VCC = 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, tUGATEpdh. The RT9612B has
comparatively large tUGATEpdh 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
1




RT9612B pdf, 반도체, 판매, 대치품
RT9612A/B
Function Pin Description
SOP-8
1
Pin No.
SOP-8 (Exposed Pad)/ Pin Name
WDFN-8EL 3x3
1 BOOT
2 2 PWM
3 3 NC
4 4 VCC
5 5 LGATE
6
6,
9 (Exposed Pad)
GND
7 7 PHASE
8 8 UGATE
Pin Function
Floating Bootstrap Supply pin for Upper Gate Drive.
Input PWM Signal for Controlling the Driver.
No Internal Connection.
12V Supply Voltage.
Lower Gate Driver Output. Connect this pin to gate of low side
power N-MOSFET.
Ground. The exposed pad must be soldered to a large PCB
and connected to GND for maximum power dissipation.
Connect this pin to the source of the high side MOSFET and
the drain of the low side MOSFET.
Upper Gate Drive Output. Connect this pin to gate of high side
power N-MOSFET.
Function Block Diagram
VCC
PWM
Internal
3.6V
15k
15k
POR
Tri-State
Detect
Bootstrap
Control
Shoot-Through
Protection
Turn Off
Detection
Shoot-Through
Protection
VCC
BOOT
UGATE
12k
PHASE
12k
LGATE
12k
GND
Copyright ©2012 Richtek Technology Corporation. All rights reserved.
www.richtek.com
4
is a registered trademark of Richtek Technology Corporation.
DS9612A/B-03 June 2012

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RT9612B 전자부품, 판매, 대치품
Typical Operating Characteristics
PWM Rising Edge
UGATE
(20V/Div)
PHASE
(20V/Div)
LGATE
(10V/Div)
PWM
(5V/Div)
VIN = 12V, No Load
Time (20ns/Div)
Dead Time
UGATE
RT9612A/B
PWM Falling Edge
UGATE
(20V/Div)
PHASE
(20V/Div)
LGATE
(10V/Div)
PWM
(5V/Div)
VIN = 12V, No Load
Time (20ns/Div)
UGATE
Dead Time
PHASE
PHASE
(5V/Div)
LGATE
VIN = 12V, PWM Rising, No Load
Time (20ns/Div)
Dead Time
UGATE
LGATE
(5V/Div)
VIN = 12V, PWM Falling, No Load
Time (20ns/Div)
UGATE
Dead Time
PHASE
PHASE
(5V/Div)
LGATE
VIN = 12V, PWM Rising, Full Load
Time (20ns/Div)
LGATE
(5V/Div)
VIN = 12V, PWM Falling, Full Load
Time (20ns/Div)
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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부품번호상세설명 및 기능제조사
RT9612A

Synchronous-Rectified Buck MOSFET Driver

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RT9612B

Synchronous-Rectified Buck MOSFET Driver

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