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PDF DS8813D Data sheet ( Hoja de datos )
| Número de pieza | DS8813D | |
| Descripción | Multi-Phase PWM Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT8813D
Multi-Phase PWM Controller with PWM-VID Reference
General Description
The RT8813D is a 3/2/1 phase synchronous Buck PWM
controller which is optimized for high performance graphic
microprocessor and computer applications. The IC
integrates a Constant-On-Time (COT) PWM controller, two
MOSFET drivers with internal bootstrap diodes, as well
as channel current balance and protection functions
including Over Voltage Protection (OVP), Under Voltage
Protection (UVP), current limit, and thermal shutdown into
the WQFN-24L 4x4 package.
The RT8813D adopts RDS(ON) current sensing technique.
Current limit is accomplished through continuous inductor-
current-sense, while RDS(ON) current sensing is used for
accurate channel current balance. Using the method of
current sampling utilizes the best advantages of each
technique.
The RT8813D features external reference input and PWM-
VID dynamic output voltage control, in which the feedback
voltage is regulated and tracks external input reference
voltage. Other features include adjustable switching
frequency, dynamic phase number control, internal soft-
start, power good indicator, and enable functions.
Ordering Information
RT8813D
Package Type
QW : WQFN-24L 4x4 (W-Type)
(Exposed Pad-Option 1)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
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.
Marking Information
4E= : Product Code
4E=YM
DNN
YMDNN : Date Code
Features
Multi-Phase PWM Controller
Two Embedded MOSFET Drivers and Embedded
Switching Boot Diode
External Reference Input Control
PWM-VID Dynamic Voltage Control
Dynamic Phase Number Control
Lossless RDS(ON) Current Sensing for Current Balance
Adjustable Current Limit Threshold
Adjustable Switching Frequency
UVP/OVP Protection
Shoot Through Protection and Short Pulse Free
Technology
Support an Ultra-Low Output Voltage as Standby
Voltage
Thermal Alert Indicator in 2/1 Active Phase
Application
Thermal Shutdown
Power Good Indicator
RoHS Compliant and Halogen Free
Applications
CPU/GPU Core Power Supply
Notebook PC Memory Power Supply
Chipset/RAM Power Supply
Generic DC/DC Power Regulator
Pin Configuration
(TOP VIEW)
BOOT1 1
UGATE1 2
EN 3
PSI 4
VID 5
REFADJ 6
24 23 22 21 20 19
18 BOOT2
17 UGATE2
GND
16 PGOOD
15 VCC/ISEN1
25 14 TALERT/ISEN2
13 TSNS/ISEN3
7 8 9 10 11 12
WQFN-24L 4x4
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8813D-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT8813D
Absolute Maximum Ratings (Note 1)
TON to GND ------------------------------------------------------------------------------------------------------------------ −0.3V to 30V
RGND to GND --------------------------------------------------------------------------------------------------------------- −0.7V to 0.7V
BOOTx to PHASEx -------------------------------------------------------------------------------------------------------- −0.3V to 6V
BOOTx to GND
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 36V
<100ns ------------------------------------------------------------------------------------------------------------------------ −5V to 42V
PHASEx to GND (Note 6)
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 30V
<100ns ------------------------------------------------------------------------------------------------------------------------ −8V to 36V
UGATEx to PHASEx
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 6V
<100ns ------------------------------------------------------------------------------------------------------------------------ −5V to 7.5V
LGATEx to GND
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 6V
<100ns ------------------------------------------------------------------------------------------------------------------------ −2.5V to 7.5V
Other Pins -------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WQFN-24L 4x4 ------------------------------------------------------------------------------------------------------------- 3.57W
Package Thermal Resistance (Note 2)
WQFN-24L 4x4, θJA -------------------------------------------------------------------------------------------------------- 28°C/W
WQFN-24L 4x4, θJC ------------------------------------------------------------------------------------------------------- 7°C/W
Lead Temperature (Soldering, 10 sec.) -------------------------------------------------------------------------------- 260°C
Junction Temperature ------------------------------------------------------------------------------------------------------ 150°C
Storage Temperature Range --------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ----------------------------------------------------------------------------------------------- 2kV
Recommended Operating Conditions (Note 4)
Input Voltage, VIN ----------------------------------------------------------------------------------------------------------- 7V to 26V
Supply Voltage, VPVCC ---------------------------------------------------------------------------------------------------- 4.5V to 5.5V
Junction Temperature Range --------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(TA = 25°C unless otherwise specified)
Parameter
Symbol
PWM Controller
PVCC Supply Voltage
PVCC Supply Current
PVCC Shutdown Current
PVCC POR Threshold
VPVCC
ISUPPLY
ISHDN
POR Hysteresis
Test Conditions
EN = 3.3V, Not Switching
EN = 0V
Min Typ Max Unit
4.5 -- 5.5 V
-- 1.5 2 mA
-- -- 10 A
3.8 4.1 4.4
V
-- 0.3 --
V
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8813D-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT8813D
OVP
UVP
VVSNS
(1V/Div)
UGATE1
(20V/Div)
LGATE1
(5V/Div)
EN
(2V/Div)
PGOOD
(5V/Div)
VOUT
(50mV/Div)
PHASE1
(20V/Div)
PVCC
(5V/Div)
PGOOD
(5V/Div)
VOUT
(500mV/Div)
PHASE1
(20V/Div)
VIN = 19V, VPVCC = 5V, No Load
Time (100μs/Div)
Power On from EN
VVSNS
(1V/Div)
UGATE1
(20V/Div)
LGATE1
(5V/Div)
EN
(2V/Div)
PGOOD
(5V/Div)
VOUT
(500mV/Div)
VIN = 19V, VPVCC = 5V, IOUT = 30A
Time (500μs/Div)
PHASE1
(20V/Div)
Power On from PVCC
PVCC
(5V/Div)
PGOOD
(5V/Div)
VIN = 19V, VEN = 1.8V, IOUT = 30A
Time (500μs/Div)
VOUT
(500mV/Div)
PHASE1
(20V/Div)
VIN = 19V, VPVCC = 5V, IOUT = 40A
Time (20μs/Div)
Power Off from EN
EN
PGOOD
VOUT
VIN = 19V, VPVCC = 5V, IOUT = 30A
Time (500μs/Div)
Power Off from PVCC
PVCC
PGOOD
VOUT
VIN = 19V, VEN = 1.8V, IOUT = 30A
Time (500μs/Div)
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8813D-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet DS8813D.PDF ] | |
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