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PDF FAN53168 Datasheet ( Hoja de datos )

Número de pieza FAN53168
Descripción 6-Bit VID Controlled 2-4 Phase DC-DC Controller
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo

Total 28 Páginas
		
FAN53168 Hoja de datos, Descripción, Manual
www.fairchildsemi.com
FAN53168
6-Bit VID Controlled 2-4 Phase DC-DC Controller
www.datasheet4u.com
Features
General Description
• Precision Multi-Phase DC-DC Core Voltage Regulation
– ±10mV Output Voltage Accuracy Over Temperature
• Differential Remote Voltage Sensing
• Selectable 2, 3, or 4 Phase Operation
• Up to 1MHz per Phase Operation (4MHz ripple
Frequency)
• Lossless Inductor Current Sensing for Loadline
Compensation
– External Temperature Compensation
• Accurate Load-Line Programming (Meets Intel
VRM/VRD10 CPU Specifications)
• Accurate Channel-Current Balancing for Thermal
Optimization and Layout Compensation
• Convenient 12V Supply Biasing
• 6-bit Voltage Identification (VID) Input
– .8375V to 1.600V in 12.5mV Steps
– Dynamic VID Capability with Fault-Blanking for
glitch-less Output voltage Changes
• Adjustable Over Current Protection with Programmable
Latch-Off Delay
• Over-Voltage Protection - Internal OVP Crowbar
Protection
Applications
The FAN53168 is a multi-phase DC-DC controller for
implementing high-current, low-voltage, CPU core power
regulation circuits. It is part of a chipset that includes
external MOSFET drivers and power MOSFETS. The
FAN53168 drives up to 4 synchronous-rectified buck
channels in parallel. The multi-phase buck converter
architecture uses interleaved switching to multiply ripple
frequency by the number of phases and reduce input and
output ripple currents. Lower ripple results in fewer compo-
nents, lower component cost, reduced power dissipation, and
smaller board area.
The FAN53168 features a high bandwidth control loop to
provide optimal response to load transients. The FAN53168
senses current using lossless techniques: Phase current is
measured through each of the output inductors. This current
information is summed, averaged and used to set the loadline
of the output via programmable “droop”. The droop is tem-
perature compensated to achieve precise loadline character-
istics over the entire operating range. Additionally,
individual phase current is measured using the RDS-ON of the
low-side MOSFET’s. This information is used to dynami-
cally balance/steer per-phase current. The phase currents are
also summed and averaged for over-current detection.
• Computer DC/DC Converter VRM/VRD10.0
• Computer DC/DC Converter VRM/VRD9.X
• High Current, Low Voltage DC/DC Rail
Dynamic-VID technology allows on-the-fly VID changes
with controlled, glitch-less output. Additionally, short-circuit
protection, adjustable current limiting, over-voltage protec-
tion and power-good circuitry combine to ensure reliable and
safe operation. The operating temperature range is 0oC to
+85oC and the operating voltage is a single +12V supply,
simplifying design. The FAN53168 is available in a TSSOP-
28 package.
System Block Diagram
VIN
Φ1 FAN53418
FAN53168
Φ2
Φ3
VIN
VOUT
Φ4 FAN53418
REV. 1.0.0 6/9/03

1 page

FAN53168 pdf
PRODUCT SPECIFICATION
FAN53168
Electrical Specications1
(Vcc = 12V, TA = 0°C to +85°C and FBRTN = GND, unless otherwise noted.)
The denotes specications which apply over the full operating temperature range.
Parameter
Symbol
Conditions
Current Sense Amplifier
www.datashOeeftf4sue.ct oVmoltage
Input Bias Current
Gain Bandwidth Product
Slew Rate
Input Common Mode
Range
VOS(CSA)
IBIAS(CSA)
GBW(ERR)
CSSUM-CSREF, Test Circuit 1
COMP = FB
CCOMP = 10pF
CSSUM and CSREF
Positioning Accuracy
Output Voltage Range
Output Current
Current Balance Circuit
VFB
IO(ERR)
COMP = FB, Test Circuit 2
ICSCOMP = ±100µA
FB forced to VOUT 3%
Common Mode Range
VSW(X)CM
Input Resistance
RSW(X)
Input Current
ISW(X)
Input Current Matching
ISW(X)
Current Limit Comparator
SW(X) = 0V
SW(X) = 0V
SW(X) = 0V
ILIMIT Output Voltage
Normal Mode
In Shutdown
Output Current, Normal
Mode
VILIMIT(NM)
VILIMIT(SD)
IILIMIT(NM)
EN > 0.8V, RILIMIT = 250k
EN < 0.4V, IILIMIT = -100µA
EN > 0.8V, RILIMIT = 250k
Maximum Output Current
EN > 0.8V
Current Limit Threshold
Voltage
VCL VCSREF-VCSCOMP, RILIMIT = 250kΩ •
Current Limit Setting Ratio
VCL/IILIMIT
Min.
-1.5
-50
0
-83
0.05
-600
20
4
-5
2.9
60
105
Latch-off Delay Threshold VDELAY In Current Limit
Latch-off Delay Time
tDELAY RDELAY = 250k, CDELAY = 4.7nF
Soft Start
Output Current, Softstart IDELAY(SS) During Start-up, DELAY < 2.8 V
Mode
Soft Start Delay Time
TDELAY(SS) RDELAY = 250k, CDELAY = 4.7nF,
VID[5:0] = 011111
Enable Input
Input Low Voltage
VIL(EN)
Input High Voltage
VIH(EN)
Input Current, EN Low
IIL(EN) EN = 0V
Input Current, EN High
IIH(EN) EN = 1.25V
1.7
15
0.8
-1
Typ.
20
50
-80
500
30
7
3
12
125
10.4
1.8
600
20
350
10
Max. Units
+1.5 mV
+50 nA
MHz
V/µs
3V
-77 mV
3.3 V
µA
+200
40
10
+5
mV
k
µA
%
3.1 V
400 mV
µA
µA
145 mV
mV/
µA
1.9 V
µs
25 µA
µs
0.4 V
V
1 µA
25 µA
Notes:
1. All limits at operating temperature extremes are guaranteed by design, characterization and statistical quality control
2. Guaranteed by design NOT tested in production.
REV. 1.0.0 6/9/03
5

5 Page

FAN53168 arduino
PRODUCT SPECIFICATION
Table 2. VID Codes
VID4
1
0
0
www.datasheet4u.c0om
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
VID3
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
REV. 1.0.0 6/9/03
VID2
1
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
VID1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
VID0
1
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
FAN53168
VID5
X
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
VOUT (nominal)
No CPU
0.8375 V
0.850 V
0.8625 V
0.875 V
0.8875 V
0.900 V
0.9125 V
0.925 V
0.9375 V
0.950 V
0.9625 V
0.975 V
0.9875 V
1.000 V
1.0125 V
1.025 V
1.0375 V
1.050 V
1.0625 V
1.075 V
1.0875 V
1.100 V
1.1125 V
1.125 V
1.1375 V
1.150 V
1.1625 V
1.175 V
1.1875 V
1.200 V
1.2125 V
1.225 V
1.2375 V
1.250 V
1.2625 V
1.275 V
1.2875 V
1.300 V
1.3125 V
1.325 V
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