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RT9624E の電気的特性と機能

RT9624EのメーカーはRichtekです、この部品の機能は「Single Phase Synchronous Rectified Buck MOSFET Driver」です。


製品の詳細 ( Datasheet PDF )

部品番号 RT9624E
部品説明 Single Phase Synchronous Rectified Buck MOSFET Driver
メーカ Richtek
ロゴ Richtek ロゴ 




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RT9624E Datasheet, RT9624E PDF,ピン配置, 機能
®
RT9624E
Single Phase Synchronous Rectified Buck MOSFET Driver
General Description
The RT9624E is a high frequency, synchronous rectified,
single phase MOSFET driver designed for normal MOSFET
driving applications and high performance CPU VR driving
capabilities.
The RT9624E can be supplied from 4.5V to 13.2V. The
applicable power stage VIN range is from 5V to 24V. The
RT9624E also builds in an internal power switch to replace
external bootstrap diode.
The RT9624E can support switching frequency efficiently
up to 500kHz. The RT9624E has both UGATE and LGATE
driving circuits for synchronous rectified DC/DC converter
applications. The shoot through protection mechanism is
designed to prevent shoot through between high-side and
low-side power MOSFETs. The RT9624E has tri-state
PWM input with shutdown and EN input shutdown
functions, which can force driver to output low UGATE
and LGATE signals.
The RT9624E is available in a small footprint WDFN-8L
3x3 package.
Features
z Drive Two N-MOSFETs
z Shoot Through Protection
z Embedded Bootstrap Diode
z Support High Switching Frequency
z Fast Output Rising Time
z Tri-State PWM Input for Output Shutdown
z Enable Control
z 8-Lead WDFN Package
z RoHS Compliant and Halogen Free
Applications
z Core Voltage Supplies for Desktop, Motherboard CPU
z High Frequency Low Profile DC/DC Converters
z High Current Low Voltage DC/DC Converters
z Core Voltage Supplies for GFX Card
Marking Information
4Q= : Product Code
4Q=YM
DNN
YMDNN : Date Code
Simplified Application Circuit
R1
12V
C1
Chip Enable
PWM
Controller
RT9624E
VCC
BOOT
R2
UGATE
EN PHASE
PWM LGATE
GND
CBOOT
R3
R4
C5 C6
VIN
Q1
L1
VOUT
R5
Q2
C2
C3 C4
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9624E-00 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1

1 Page





RT9624E pdf, ピン配列
RT9624E
Function Pin Description
Pin No.
Pin Name
Pin Function
1
PWM
PWM Signal Input. Connect this pin to the PWM output of the controller.
2, 9 (Exposed Pad) GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
3 EN
Enable Control Input (Active High). When this pin is low, both UGATE and
LGATE are driven to low.
4
VCC
Supply Voltage Input.
5
LGATE
Low-Side Gate Driver Output. Connect this pin to the Gate of low-side power
N-MOSFET.
6
PHASE
Connect this pin to the Source of the high-side N-MOSFET and the Drain of the
low side N-MOSFET.
7
UGATE
High-Side Gate Drive Output. Connect this pin to the Gate of high-side power
N-MOSFET.
8
BOOT
Bootstrap Supply for High-Side Gate Drive.
Function Block Diagram
EN VCC
Internal
VDD
Enable
Detect
POR
PWM
Tri-State
Detect
Bootstrap
Control
Shoot-Through
Protection
Turn Off
Detection
Shoot-Through
Protection
VCC
BOOT
UGATE
PHASE
LGATE
GND
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
DS9624E-00 January 2014
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
3


3Pages


RT9624E 電子部品, 半導体
RT9624E
Electrical Characteristics
(VCC = 12V, TA = 25°C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Power Supply
Power Supply Voltage
Power Supply Current
Power On Reset (POR)
VCC
IVCC
VBOOT = 12V, PWM Input Floating
4.5 -- 13.2 V
-- 120 -- μA
POR Rising Threshold
POR Falling Threshold
VPOR_r
VPOR_ f
VCC Rising
VCC Falling
-- 4 4.4 V
3 3.5 --
V
EN Input
EN Rising Threshold
VENH
-- 1.3 1.6 V
EN Falling Threshold
VENL
0.7 1 -- V
PWM Input
Maximum Input Current IPWM
PWM = 0V or 5V
-- 160 -- μA
PWM Floating Voltage
VPWM_fl
PWM = Open
-- 1.8 --
V
PWM Rising Threshold
VPWM_rth
2.3 2.8 3.2 V
PWM Falling Threshold VPWM_fth
0.7 1.1 1.4 V
Timing
UGATE Rising Time
tUGATEr
3nF Load
-- 25 -- ns
UGATE Falling Time
tUGATEf
3nF Load
-- 12 -- ns
LGATE Rising Time
tLGATEr
3nF Load
-- 24 -- ns
LGATE Falling Time
tLGATEf
3nF Load
-- 10 -- ns
tUGATEpdh
UGATE Propagation Delay
tUGATEpdl
VBOOT VPHASE = 12V
See Timing Diagram
-- 60 --
ns
-- 22 --
LGATE Propagation Delay
Output
tLGATEpdh
tLGATEpdl
See Timing Diagram
See Timing Diagram
-- 30 --
ns
-- 8 --
UGATE Drive Source
UGATE Drive Sink
LGATE Drive Source
LGATE Drive Sink
RUGATE_sr VBOOT VPHASE = 12V, ISource = 100mA -- 1.7 --
RUGATE_sk VBOOT VPHASE = 12V, ISink = 100mA
-- 1.4 --
RLGATE_sr ISource = 100mA
-- 1.6 --
RLGATE_sk ISink = 100mA
-- 1.1 --
Ω
Ω
Ω
Ω
Note 1. Stresses beyond those listed Absolute Maximum Ratingsmay cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2014 Richtek Technology Corporation. All rights reserved.
www.richtek.com
6
is a registered trademark of Richtek Technology Corporation.
DS9624E-00 January 2014

6 Page



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共有リンク

Link :


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