|
|
PDF CM8500 Data sheet ( Hoja de datos )
| Número de pieza | CM8500 | |
| Descripción | 3A BUS TERMINATOR | |
| Fabricantes | ETC | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de CM8500 (archivo pdf) en la parte inferior de esta página. Total 13 Páginas | ||
|
No Preview Available !
CM8500
3A BUS TERMINATOR
GENERAL DESCRIPTION
FEATURES
The CM8500 is a switching regulator designed to provide a
desired output voltage or termination voltage for various
applications by converting voltage supplies ranging from 2.0V
to 4.0V. The CM8500 can be implemented to produce
regulated output voltages in two different modes. In the
default mode, when the VIN/2 pin is open, the output voltage
is 50% of the VCCQ. The CM8500 can also be used to
produce various user-defined voltages by forcing a voltage on
the VIN/2 pin. In this case, the output voltage follows the
VIN/2 pin input voltage. The switching regulator is capable of
sourcing or sinking up to 3A of current while regulating an
output V TT voltage to within 3% or less.
The CM8500, used in conjunction with series termination
resistors, provides an excellent voltage source for active
termination schemes of high speed transmission lines as
those seen in high speed memory buses and distributed
backplane designs.
Patent Filed #6,452,366
16 pin PTSSOP and PSOP package
Source and sink up to 3A, no heat sink required
Peak Current to 6A
Integrated Power MOSFETs
Output voltage can be programmed by external resistors
Separate voltages for VCCQ and PVDD
V OUT of ±3% or less at 3A
Minimum external components
Shutdown for standby or suspend mode operation
Thermal shutdown protection
Soft start
The voltage output of the regulator can be used as a
termination voltage for other bus interface standards such as
SSTL, CMOS, Rambus ™ ,GTL+, VME, LV-CMOS, LV-TTL,
and PECL.
APPLICATIONS
Mother Board
PCI / AGP Graphics
Game / Play Station
Set Top Box
IPC
SCSI-III Bus terminator
Buck Converter
PIN CONFIGURATION
PSOP-16 (PS16)/PTSSOP-16 (PT16)
Top View
1
VCC1
VCC2
16
2
PVDD1
PVDD2
15
3 VL1
VL2 14
4
PGND1
PGND2
13
5
AGND
AGND
12
6 SD
VFB
11
7
VIN/2
VCCQ
10
8
AGSEN
AGND
9
2004/06/01 Rev. 1.1
Champion Microelectronic Corporation
Page 1
1 page  
APPLICATION CIRCUIT
CM8500
3A BUS TERMINATOR
Vref-OUT
J3
1
2
TP1 4
BNC
3
1
VTT
J1
1
2
C13
104 R8
100
L1
100uf/6.3V 100uf/6.3V 820uf/6.3V 3.3uH
C12 C11 C7
C3
104
C2 C15
104 10uf/6.3V
VDD
2 C14
100uf/6.3V
R5
1 100k
J4ON/OFF 2
2
R6 R7
10k 1 10k 1
NOTE:
J3:referance output provided from Vtt
J4:short :Demo kit on .
open:off(into shutdown mode)
J6:reference output provided from shunt regulator
J5:pin1 ,pin2 short:Vtt = 1/2Vcc
When external voltage applied ,pin1,2 should be open
and pin2:connect to external voltage (+)
pin3:connect to external voltage (-)
D6
SK12
D5
SK12
Vtt=1/2 external voltage
R6,R7(option circuit)forVttVOLTAGEADJUST
Vtt=(Vcc*R6)/R6+R7
VCC
U1 CM8500
1 VCC1
VCC2
2 VDD1
VDD2
C4 3 VL1
VL2
104 4 PGND1 PGND2
5 AGND1 AGND4
6 SD
FB
7 2/VCC VCCQ
C6 8 G-sense AGND3
102
16
15
14
13
12
11
10
9
VDD
VCC
R1
5R1
C5 C1
C10
104 10uf/6.3V
104 C9
100uf/6.3V
J5
2
3
1
IN/EXT
VDD
C16
470uf/6.3V
J2
DC-INPUT
1
2
R3 200k
12
1
R4
1k
2
C8
102
Figure 1. CM8500 Typical Application
(Schematic of CM8500TEVAL)
2004/06/01 Rev. 1.1
Champion Microelectronic Corporation
Page 5
5 Page 
CM8500
3A BUS TERMINATOR
CM8500 Temperature vs. VTT (VCC,VCCQ&VDD=2.5V)
1.350
1.300
1.250
1.200
1.150
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 85
T( )
Temperature vs. VTT VCC, VCCQ & VDD=2.5V
1A
2A
3A
2V INPUT LOAD: 0A - 3A
2V INPUT LOAD: 3A - 0A
2.5V INPUT LOAD: 0A - 3A
2.5V INPUT LOAD: 3A - 0A
3.3V INPUT LOAD: 0A - 3A
3.3V INPUT LOAD: 3A - 0A
2004/06/01 Rev. 1.1
Champion Microelectronic Corporation
Page 11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet CM8500.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| CM8500 | 3A BUS TERMINATOR | ETC |
| CM8501 | 1.5A BUS TERMINATOR |  Champion |
| CM8501A | 1.5A BUS TERMINATOR | Champion |
| 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 |