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PDF FAN5019B Data sheet ( Hoja de datos )
| Número de pieza | FAN5019B | |
| Descripción | 6-Bit VID Controller 2-4 Phase VR10.X Controller | |
| Fabricantes | Fairchild Semiconductor | |
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FAN5019B
www.fairchildsemi.com
6-Bit VID Controller 2-4 Phase VR10.X Controller
Features
• Improved Noise Immunity
• Improved Load Line Accuracy
• TTL Compatible VID Inputs
• Fully Pin and Function compatible with existing
FAN5019 and ADP3188 Controllers
• 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
• Selectable VRM9 or VRM10 Operation
• Up to 1MHz per Phase Operation (4MHz ripple
Frequency)
• Lossless Inductor Current Sensing for Loadline
Compensation
– External Temperature Compensation
• Accurate Loadline Programming (Meets Intel®
VRM/VRD10.x 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. Latch-Off Function may be Disabled
• Over-Voltage Protection – Internal OVP Crowbar
Protection
• Package: 28L-TSSOP
Applications
• VRM/VRD 9.x and 10.x Computer DC/DC Converter
• High-Current, Low-Voltage DC/DC Rail
General Description
The FAN5019B 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 exter-
nal MOSFET drivers and power MOSFETS. The
FAN5019B drives up to four synchronous-rectified buck
channels in parallel. The multi-phase buck converter archi-
tecture uses interleaved switching to multiply ripple fre-
quency by the number of phases and reduce input and output
ripple currents. Lower ripple results in fewer components,
lower component cost, reduced power dissipation, and
smaller board area.
The FAN5019B features a high-bandwidth control loop to
provide optimal response to load transients. The FAN5019B
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 MOSFETs. This information is used to dynam-
ically balance/steer per-phase current. The phase currents
are also summed and averaged for over-current detection.
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. FAN5019B is specified over the commercial
temperature range of 0°C to +85°C and operates from a sin-
gle +12V supply which simplifies design. FAN5019B is
available in a 28L-TSSOP package.
Block Diagram
VIN
Φ1 FAN5009
Φ2
FAN5019B
Φ3
Φ4 FAN5009
VIN
VOUT
REV. 1.0.0 Jul/15/05
1 page  
PRODUCT SPECIFICATION
FAN5019B
www.DaEtalSehcetert4icU.acolmSpecifications
(VCC = 12V, TA = 0°C to +85°C and FBRTN=GND, using circuit in Figure 1, unless otherwise noted.)
The • denotes specifications which apply over the full operating temperature range.
Parameter
Error Amplifier
Output Voltage Range
Accuracy
Symbol
VCOMP
VFB
Line Regulation
Input Bias Current
FBRTN Current
Output Current
Gain Bandwidth Product
DC Gain
VID Inputs
Input Low Voltage
ΔVFB
IFB
IFBRTN
IO(ERR)
GBW
VIL(VID)
Input High Voltage
VIH(VID)
Input Current, VID Low
Input Current, VID High
Pull-up Resistance
Internal Pull-up Voltage
IIL(VID)
IIH(VID)
RVID
VID Transition Delay
Time2
“No CPU” Detection
Turn-off Delay Time2
VID Table Select
Vtblsel
Oscillator
Frequency
Frequency Variation
fOSC
fPHASE
Output Voltage
RAMPADJ Pin Accuracy
VRT
VRAMPADJ
RAMPADJ Input Current
Current Sense Amplifier
Offset Voltage
Input Bias Current
Gain Bandwidth Product
IRAMPADJ
VOS(CSA)
IBIAS(CSA)
GBW
Conditions
Min. Typ. Max. Units
• 0.5
3.5
Relative to DAC Setting,
referenced to FBRTN,
CSSUM = CSCOMP,
Test Circuit 3
VRM10 • -10
VRM9 • -12
+10
+12
VCC=10V to 14V
0.05
• -17 -15 -13
• 150 180
FB forced to VOUT – 3%
300 500
COMP = FB ( See Note 2)
20
CCOMP = 10pF ( See Note 2)
77
V
mV
%
µA
µA
µA
MHz
dB
VRM10
VRM9
VRM10
VRM9
VID(X) = 0V
VID(X) = 1.15V
Internal
VRM10
VRM9
VID Code Change to FB Change
• 0.4
• 0.8
• 0.8
• 2.0
• -30 -20
• -2
2
• 35
60 115
• 1.0 1.15 1.26
• 2.2 2.4 2.6
• 400
VID Code Change to 11111X to PWM
going low
To select VRM9 table
To select VRM10 table (becomes VID5)
•
•
•
400
4
3.5
V
V
V
V
µA
µA
kΩ
V
V
ns
ns
V
V
TA = +25°C, RT = 250kΩ, 4-Phase
TA = +25°C, RT = 115kΩ, 4-Phase
TA = +25°C, RT = 75kΩ, 4-Phase
RT = 100kΩ to GND
VRAMPADJ = Vdac = +2K • (Vin–Vdac)/
(Rr+2k) @ 20µA
Current into RAMPADJ pin
• 200
4000
• 155 200 245
400
600
• 1.9 2.0 2.1
• -50
+50
0 100
kHz
kHz
kHz
kHz
V
mV
µA
CSSUM–CSREF, Test Circuit 1
COMP = FB ( See Note 2)
• -1.5
+1.5 mV
• -50
+50 nA
10 MHz
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 Jul/15/05
5
5 Page 
PRODUCT SPECIFICATION
FAN5019B
www.DaBtaiSllheoeft4MU.caotmerials
Table 1. FAN5019B VRM/VRD10 Application Bill of Materials for Figure 1
Ref
U4
U1–3
Q1–3
Q4–9
L1–3
L4
R1
RR RDLY, RT
R5
RPH1–3
RA, RCS2
RB1
RB
RSW1–3
RCS1
RLIM
R19–21
RTH
C1–7
C8–10
C12–14, CCS
CDLY
CB
CA
CFB
CX
CZ
CIN
Qty Description
Manufacturer/Number
1 VR10, Multi-Phase Controller
Fairchild FAN5019B
3 Sync MOSFET Driver, 12V/12V
Fairchild FAN5009
3 N-MOSFET, 30V, 50A, 8mΩ
Fairchild FDD6696
6 N-MOSFET, 30V, 75A, 5mΩ
Fairchild FDD6682
3 Inductor, 650nH, 26A, 1.6mΩ
Micrometals T50-8B/90, 5T, 16AWG
1 Inductor, 630nH, 15A, 1.7mΩ
Inter-Technical AK1418160052A-R63M
1 10Ω, 5%
3 301kΩ, 1%
1 15.0kΩ, 1%
3 100kΩ, 1%
2 24.9kΩ, 1%
1 10Ω, 1%
1 1.33kΩ, 1%
3 0Ω, 5%
1 37.4kΩ, 1%
1 200kΩ, 1%
3 1.5Ω, 5%
1 NTC Thermistor, 100kΩ, 5%
Panasonic ERT-J1V V104J
7 1.0µF, 25V, 10% X7R
3 0.1µF, 50V, 10% X7R
4 4700pF, 25V, 10% X7R
1 0.047µF, 25V, 10% X7R
1 2200pF, 25V, 10% X7R
1 470pF, 50V, 10% X7R
1 100pF, 50V, 5% NPO
8 820µF, 2.5V, 20% 7mΩ, POLY
Fujitsu FP-2R5RE821M
22 10µF, 6.3V, 20% X5R
6 470µF, 16V, 20%, 36mΩ, Alum-Elec Rubycon 16MBZ470M
Note:
The design shown in this datasheet should be used as a reference only. Please contact your Fairchild sales representative
for the latest information.
REV. 1.0.0 Jul/15/05
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet FAN5019B.PDF ] | |
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