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PDF CS5305 Data sheet ( Hoja de datos )
| Número de pieza | CS5305 | |
| Descripción | Three-Phase Synchronous Switching Step-Down Controller | |
| Fabricantes | ON Semiconductor | |
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Hay una vista previa y un enlace de descarga de CS5305 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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CS5305
Three−Phase Synchronous
Switching Step−Down
Controller with Single
Wire Current Sharing
The CS5305 provides a low−cost, single−controller solution for the
low−voltage, high−current power needs of next−generation
workstation and server processors. This IC provides high accuracy and
the industry’s fastest transient response, reducing the need for large
banks of output capacitors and providing the most compact, reliable,
and economical power supply.
Since each phase’s output voltage and current feed back to develop
the PWM ramp signal (enhanced V2™ control), the CS5305 shares
output current accurately between phases. Accurate current sharing
means that the power supply design does not need to use power
components rated to handle mismatched current per phase. The
enhanced V2 control compensates for variations in both line and load.
The IC’s built−in single wire current sharing capability allows easy
paralleling of multiple Voltage Regulator Modules (VRMs) based on
the CS5305. The paralleled VRMs use a shared bus to provide high
current and high reliability to multiple microprocessor workstations
or servers.
The CS5305 meets VRM 9.x specifications with its Power Good,
Enable, Differential Remote Sense, and single−wire Current Share
features. The product fits server and workstation VRMs, and can be
used to power Embedded Processors. The IC provides the simplest,
lowest−cost solution for any low voltage, high current power supply.
Features
• Enhanced V2 Control Method
• VRM 9.x Compatible VID Codes
• Lossless Inductor Current Sensing
• Single Wire Active Current Sharing Between Converters
• Auto Master−Slave Current Share Control Method
• Programmable 200 to 800 kHz Switching Frequency
• Programmable Adaptive Voltage Positioning
• Differential Remote Sense
• Pulse−by−Pulse Current Limit
• Master Hiccup Overcurrent Protection through Single
Wire Share Bus
• 5−Bit DAC with 1% Tolerance
• ENABL Input
• VRM 9.x−Compliant Power Good Output
• Active Current Sharing During Soft Start
http://onsemi.com
MARKING
DIAGRAMS
28
28
1
SO−28L
DW SUFFIX
CASE 751F
CS5305
AWLYYWW
1
A = Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
PIN CONNECTIONS
1
OCSET
ROSC
ENABL
CS1
28GND
GATE1
GATE2
GATE3
CS2
CS3
CSREF
IFB
IOUT
SHARE
SCOMP
VDRP
VFB
COMP
DRVON
VCC
SGND
PWRGDS
VID0
VID1
VID2
VID3
VID4
PWRGD
ORDERING INFORMATION
Device
Package
Shipping
CS5305GDW28
SO−28L 27 Units/Rail
CS5305GDWR28 SO−28L 1000 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
July, 2006 − Rev. 7
1
Publication Order Number:
CS5305/D
1 page  
CS5305
ELECTRICAL CHARACTERISTICS (continued) (0°C < TA < 70°C; 0°C < TJ < 125°C; 9.5 V < VCC < 14 V; CGATEX = 100 pF,
CCOMP = 0.01μF, CSCOMP = 0.01μF, CVCC = 0.1μF, RROSC = 32.4 kΩ, RSHARE = 60.4 kΩ, V(OCSET) = 0.54 V, DAC Code 01110; unless
otherwise stated.)
Parameter
Test Conditions
Min Typ Max Unit
Voltage Identification DAC (0 = Connected to GND, 1 = Open (Pulled−up to internal 3.3 V) or Pulled−up to external voltage 3 13 V)
00111
1.675
1.535
1.550
1.566
V
00110
1.700
1.560
1.575
1.591
V
00101
1.725
1.584
1.600
1.616
V
00100
1.750
1.609
1.625
1.641
V
00011
1.775
1.634
1.650
1.667
V
00010
1.800
1.658
1.675
1.692
V
00001
1.825
1.683
1.700
1.717
V
00000
1.850
1.708
1.725
1.742
V
Input Threshold
Input Pull−up Resistance
Pull−up Voltage
VID4, VID3, VID2, VID1, VID0
0 V < VID4, VID3, VID2,VID1,
VID0 < 3.3 V
1.0 MΩ to GND
1.00 1.25 1.5 V
25 50 100 kΩ
2.5 2.7 3.0 V
SGND Bias Current
SGND < 55 mV, All DAC Codes
10
20 40 μA
Power Good Output
Upper Threshold
Force PWRGDS−SGND
SGND < 55 mV
1.876 (−5%)
1.975
2.074 (+5%)
V
Lower Threshold
Force PWRGDS−SGND
SGND < 55 mV
0.95 ×
(VID − 125 mV)
or −2.6% from
nominal PWRGD
Threshold
0.975 ×
(VID − 125 mV)
VID − 125 mV
or +2.6% from
nominal
PWRGD
Threshold
V
VID4
1
VID3
1
VID2
1
VID1
1
VID0
0
0.926
0.951
0.975
V
11101
0.950
0.975
1.000
V
11100
0.974
1.000
1.025
V
11011
0.998
1.024
1.050
V
11010
1.021
1.048
1.075
V
11001
1.045
1.073
1.100
V
11000
1.069
1.097
1.125
V
10111
1.093
1.122
1.150
V
10110
1.116
1.146
1.175
V
10101
1.140
1.170
1.200
V
10100
1.164
1.195
1.225
V
10011
1.188
1.219
1.250
V
10010
1.211
1.243
1.275
V
10001
1.235
1.268
1.300
V
10000
1.259
1.292
1.325
V
01111
1.283
1.316
1.350
V
01110
1.306
1.341
1.375
V
http://onsemi.com
5
5 Page 
CS5305
Figure 3. Block Diagram
http://onsemi.com
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CS5305.PDF ] | |
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