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PDF DS8816A Data sheet ( Hoja de datos )
| Número de pieza | DS8816A | |
| Descripción | Dual-Phase PWM Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DS8816A (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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®
RT8816A
Dual-Phase PWM Controller with PWM-VID Reference
General Description
The RT8816A is a 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-20L 3x3 package.
The RT8816A 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 RT8816A 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
RT8816A
Package Type
QW : WQFN-20L 3x3 (W-Type)
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
7J= : Product Code
7J=YM
DNN
YMDNN : Date Code
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8816A-00 September 2016
Features
Dual-Phase PWM Controller
Power State Indicator
1P-CCM/2P-CCM/1P-DEM/2P-DEM
Two Embedded MOSFET Drivers and Embedded
Switching Boot Diode
Support 1.8V PWM-VID Interface
External Reference Input Control
PWM-VID Dynamic Voltage Control
Dynamic Phase Number Control
Lossless RDS(ON) Current Sensing for Current Balance
Internal/External Soft-Start
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 Shutdown
Power Good Indicator (EN to PG high = 500μs)
Applications
CPU/GPU Core Power Supply
Desktop PC Memory, VTT Power
Chipset/RAM Power Supply
Generic DC-DC Power Regulator
Pin Configuration
(TOP VIEW)
BOOT1
UGATE1
EN
PSI
VID
20 19 18 17 16
1 15 BOOT2
2 14 UGATE2
3 GND 13 PGOOD
4 21 12 OCSET/SS
5 11 VSNS
6 7 8 9 10
WQFN-20L 3x3
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT8816A
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 ------------------------------------------------------------------------------------------------------------- −0.3V to 36V
PHASEx to GND
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 30V
<20ns ------------------------------------------------------------------------------------------------------------------------- −8V to 36V
UGATEx to PHASEx
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 6V
<20ns ------------------------------------------------------------------------------------------------------------------------- −5V to 7.5V
LGATEx to GND
DC ------------------------------------------------------------------------------------------------------------------------------ −0.3V to 6V
<20ns ------------------------------------------------------------------------------------------------------------------------- −2.5V to 7.5V
Other Pins -------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WQFN-20L 3x3 ------------------------------------------------------------------------------------------------------------- 3.33W
Package Thermal Resistance (Note 2)
WQFN-20L 3x3, θJA -------------------------------------------------------------------------------------------------------- 30°C/W
WQFN-20L 3x3, θJC ------------------------------------------------------------------------------------------------------- 7.5°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) ----------------------------------------------------------------------------------------------- 1.5kV
Recommended Operating Conditions (Note 4)
Input Voltage, VIN ---------------------------------------------------------------------------------------------------------- 2.5V to 26V
Supply Voltage, PVCC ---------------------------------------------------------------------------------------------------- 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
Test Conditions
Min Typ Max Unit
PWM Controller
PVCC Supply Voltage
VPVCC
4.5 -- 5.5 V
PVCC Supply Current
ISUPPLY
VEN = 3.3V, 1phase DEM mode, not
switching, VREF external R = 40k
--
0.4
--
mA
PVCC Shutdown Current
PVCC POR Threshold
ISHDN
VEN = 0V
-- -- 10 A
3.8 4.1 4.4
V
POR Hysteresis
-- 0.3 --
V
Switching Frequency
fSW RTON = 500k (Note 5)
270 300 330 kHz
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8816A-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
VOUT
(500mV/Div)
IL1
(10A/Div)
UGATE1
(20V/Div)
LGATE1
(5V/Div)
Current Limit and UVP
VIN = 12V, VPVCC = 5V
VSNS
(500mV/Div)
Time (100μs/Div)
UGATE1
(20V/Div)
LGATE1
(5V/Div)
RT8816A
OVP
VIN = 12V, VPVCC = 5V, No Load
Time (100μs/Div)
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS8816A-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet DS8816A.PDF ] | |
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