|
|
PDF RT8869A Data sheet ( Hoja de datos )
| Número de pieza | RT8869A | |
| Descripción | Advanced 2/1-Phase PWM Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RT8869A (archivo pdf) en la parte inferior de esta página. Total 19 Páginas | ||
|
No Preview Available !
RT8869A
Advanced 2/1-Phase PWM Controller for CPU Core Power
General Description
The RT8869A is an advanced 2/1-phase synchronous buck
controller with 2 integrated MOSFET drivers. It integrates
an 8-bit DAC that supports Intel VR11.x CPUs power
application.
The IC adopts state-of-the-art dynamic phase control
capability by PS1 pin and achieves high efficiency over a
wide load range. It uses lossless RDS(ON) current sensing
to achieve phase current balance. Other features include
adjustable operating frequency, adjustable soft-start, short
circuit protection, adjustable over current protection, over
voltage protection, under voltage protection, power good
indication, VR_HOT indication and VR_SHDN indication.
The RT8869A is available in a small footprint with WQFN-
40L 5x5 package.
Ordering Information
RT8869A
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free))
Note :
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
RT8869A
ZQW
YMDNN
RT8869AZQW : Product Number
YMDNN : Date Code
Features
z 12V Power Supply Voltage
z 2/1-Phase Power Conversion
z Integrated 2 MOSFET Drivers with Internal
Bootstrap Diode
z Dynamic Phase Control Capability
z 8-bit DAC Supports Intel VR11.x CPUs
z Lossless RDS(ON) Current Sensing for Current Balance
z Adjustable Frequency : 50kHz to 1MHz
z Adjustable Over Current Protection
z Adjustable Soft-Start
z VR_RDY, VR_HOT and VR_SHDN Indications
z Small 40-Lead WQFN Package
z RoHS Compliant and Halogen Free
Applications
z Desktop CPU Core Power
z Middle/High End Graphic Cards
z Low Voltage, High Current DC/ DC Converters
Pin Configurations
(TOP VIEW)
40 39 38 37 36 35 34 33 32 31
VRSEL 1
30
VR_RDY 2
29
SS 3
28
EN 4
27
DAC 5
EAP 6
GND
26
25
FB 7
24
COMP 8
CSP 9
CSN 10
41 23
22
21
11 12 13 14 15 16 17 18 19 20
UGATE1
PHASE1
LGATE1
VCC12A
VCC12B
LGATE2
PHASE2
UGATE2
BOOT2
VR_HOT
WQFN-40L 5x5
DS8869A-00 May 2011
www.richtek.com
1
1 page  
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 Voltage
1 0 0 0 1 1 1 0 0.72500
1 0 0 0 1 1 1 1 0.71875
1 0 0 1 0 0 0 0 0.71250
1 0 0 1 0 0 0 1 0.70625
1 0 0 1 0 0 1 0 0.70000
1 0 0 1 0 0 1 1 0.69375
1 0 0 1 0 1 0 0 0.68750
1 0 0 1 0 1 0 1 0.68125
1 0 0 1 0 1 1 0 0.67500
1 0 0 1 0 1 1 1 0.66875
1 0 0 1 1 0 0 0 0.66250
1 0 0 1 1 0 0 1 0.65625
1 0 0 1 1 0 1 0 0.65000
1 0 0 1 1 0 1 1 0.64375
1 0 0 1 1 1 0 0 0.63750
1 0 0 1 1 1 0 1 0.63125
1 0 0 1 1 1 1 0 0.62500
1 0 0 1 1 1 1 1 0.61875
1 0 1 0 0 0 0 0 0.61250
1 0 1 0 0 0 0 1 0.60625
1 0 1 0 0 0 1 0 0.60000
1 0 1 0 0 0 1 1 0.59375
1 0 1 0 0 1 0 0 0.58750
1 0 1 0 0 1 0 1 0.58125
1 0 1 0 0 1 1 0 0.57500
1 0 1 0 0 1 1 1 0.56875
1 0 1 0 1 0 0 0 0.56250
1 0 1 0 1 0 0 1 0.55625
1 0 1 0 1 0 1 0 0.55000
1 0 1 0 1 0 1 1 0.54375
1 0 1 0 1 1 0 0 0.53750
1 0 1 0 1 1 0 1 0.53125
1 0 1 0 1 1 1 0 0.52500
1 0 1 0 1 1 1 1 0.51875
1 0 1 1 0 0 0 0 0.51250
1 0 1 1 0 0 0 1 0.50625
RT8869A
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 Voltage
1 0 1 1 0 0 1 0 0.50000
1 1 1 1 1 1 1 0 OFF
1 1 1 1 1 1 1 1 OFF
DS8869A-00 May 2011
www.richtek.com
5
5 Page 
Typical Operating Characteristics
VCC5 Supply Voltage vs. Temperature
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
4.94
-50
-25
0 25 50 75 100 125
Temperature (°C)
RT8869A
308
306
304
302
300
298
296
294
-50
Frequency vs. Temperature
-25 0
25 50 75 100 125
Temperature (°C)
Inductor Current vs. Load Current
30
25
20 Phase 1
15 Phase 2
10
5
0
20 25 30 35 40 45 50 55 60
Load Current (A)
Power Off from EN
Power On from EN
VOUT
(1V/Div)
EN
(2V/Div)
VR_RDY
(1V/Div)
UGATE1
(20V/Div)
VIN = 12V, IOUT = 30A
Time (400μs/Div)
Dynamic Output Voltage Control
VOUT
(1V/Div)
EN
(2V/Div)
VR_RDY
(1V/Div)
UGATE1
(20V/Div)
VIN = 12V, IOUT = 30A
Time (40μs/Div)
VOUT
(500mV/Div)
VID5
(2V/Div)
UTATE1
(20V/Div)
UTATE2
(20V/Div)
VIN = 12V, IOUT = 0A, VID = 1V to 1.2V
Time (20μs/Div)
DS8869A-00 May 2011
www.richtek.com
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet RT8869A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RT8869A | Advanced 2/1-Phase PWM Controller | Richtek |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |