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PDF FAN5193 Data sheet ( Hoja de datos )

Número de pieza FAN5193
Descripción Two Phase Interleaved Synchronous Buck Converter
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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www.fairchildsemi.com
FAN5193
Two Phase Interleaved Synchronous Buck
Converter
Features
• Programmable output from 1.10V to 1.85V in 25mV steps
using an integrated 5-bit DAC
• Two interleaved synchronous phases for maximum
performance
• 100nsec response time
• Built-in current sharing between phases
• Remote sense
• Programmable Active Droop(Voltage Positioning)
• Programmable frequency from 200KHz to 2MHz
• Adaptive delay gate switching
• Integrated high-current gate drivers
• Integrated Power Good, OV, UVLO, Enable/Soft Start
functions
• Drives N-channel MOSFETs
• Operation optimized for 12V operation
• High efficiency mode (E*) at light load
• Overcurrent protection using MOSFET sensing
• 24 pin TSSOP package
Applications
• Power supply for PentiumIV
• Power supply for Athlon
• VRM for Pentium IV processor
• Programmable step-down power supply
Description
The FAN5193 is a synchronous multi-phase DC-DC control-
ler IC which provides a highly accurate, programmable out-
put voltage for all high-performance processors. Two
interleaved synchronous buck regulator phases with built-in
current sharing operate 180° out of phase to provide the fast
transient response needed to satisfy high current applications
while minimizing external components. The FAN5193 fea-
tures remote voltage sensing and Programmable Active
Droopfor 100nsec converter transient response with mini-
mum output capacitance. It has integrated high-current gate
drivers, with adaptive delay gate switching, eliminating the
need for external drive devices. The FAN5193 uses a 5-bit D/
A converter to program the output voltage from 1.10V to
1.85V in 25mV steps with an accuracy of 0.5%. The
FAN5193 uses a high level of integration to deliver load cur-
rents in excess of 50A from a 12V source with minimal
external circuitry. The FAN5193 also offers integrated func-
tions including Power Good, Output Enable/Soft Start,
under-voltage lockout,
over-voltage protection, and adjustable current limiting with
independent current sense on each phase. It is available in a
24 pin TSSOP package.
Block Diagram
23
OSC
5-Bit
DAC
Bypass
6
+12V
18
5V Reg
+
-
-
+
Power
Good
-
+
-
+
-
+
Digital
Control
+12V
Digital
Control
+12V
+12V +5V
13
14
15
17
16
+12V +5V
12
11
10
8
9
+12V
+12V
VO
1234 5
VID0 VID2 VID4
VID1 VID3
24 19
PWRGD
21 7
DROOP/E* GNDA
22
ENABLE/SS
20
ILIM
Pentium is a registered trademark of Intel Corporation. Athlon is a registered trademark of AMD. Programmable Active Droop is a trademark of Fairchild Semiconductor.
REV. 1.0.1 2/4/02

1 page




FAN5193 pdf
PRODUCT SPECIFICATION
FAN5193
Notes:
1. Steady State Voltage Regulation includes Initial Voltage Setpoint, Output Ripple and Output Temperature Drift and is
measured at the converter’s VFB sense point.
2. As measured at the converter’s VFB sense point. For motherboard applications, the PCB layout should exhibit no more than
0.5mtrace resistance between the converter’s output capacitors and the CPU. Remote sensing should be used for optimal
performance.
3. Using the VFB pin for remote sensing of the converter’s output at the load, the converter will be in compliance with Intel’s
VRM 9.0 specification of +70, -70mV.
Table 1. Output Voltage Programming Codes
VID4
VID3
VID2
111
111
111
111
110
110
110
110
101
101
101
101
100
100
100
100
011
011
011
011
010
010
010
010
001
001
001
001
000
000
000
000
VID1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
VID0
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
VOUT to CPU
OFF
1.100V
1.125V
1.150V
1.175V
1.200V
1.225V
1.250V
1.275V
1.300V
1.325V
1.350V
1.375V
1.400V
1.425V
1.450V
1.475V
1.500V
1.525V
1.550V
1.575V
1.600V
1.625V
1.650V
1.675V
1.700V
1.725V
1.750V
1.775V
1.800V
1.825V
1.850V
Note:
1. 0 = VID pin is tied to GND.
1 = VID pin is pulled up to 5V.
REV. 1.0.1 2/4/02
5

5 Page





FAN5193 arduino
PRODUCT SPECIFICATION
FAN5193
Table 3. FAN5193 Application Bill of Materials for Figure 2
Reference Manufacturer Part # Quantity
Description
C1-4
Panasonic
ECU-V1H104ZFX
4 100nF, 50V Capacitor
C5 Any
1 1µF, 25V Capacitor
CIN Rubycon
16ZL1000M
5 1000µF, 16V Electrolytic
COUT
Rubycon
6.3ZL1500M
8 1500µF, 6.3V Electrolytic
D1-2
Motorola
MBRB1545CT
2 15A, 45V Schottky Diode
D3-5
Fairchild
MBRS130L
3 1A, 30V Schottky Diode
D6 Fairchild
MMBD4148
1 Diode
L1 Any
Optional 1.3µH, 25A Inductor
L2-3
Q1-2, Q5-6
Q3-4, Q7-8
R1, R14-18
R2
R3
R4
R5
R6-13
U1
Coiltronics
HC2-1R0
Fairchild
FDD6690A
Fairchild
FDB6688
Any
Any
Any
Any
Any
Any
Fairchild
FAN5193M
2 1µH, 33A Inductor
4 N-Channel MOSFET
4 N-Channel MOSFET
6 10K
1 200K
1 2.0K
1 61.9K
1 10
8 4.7
1 DC/DC Controller
Requirements/Comments
IRMS = 3.8A @ 65°C
ESR 23m
DCR ~ 1m
See Note 1.
DCR ~ 600µ
RDS(ON) = 12.5mΩ. See Note 2.
RDS(ON) = 6m.See Note 2.
Notes:
1. Inductor L1 is recommended to isolate the 12V input supply from noise generated by the MOSFET switching. L1 may be
omitted if desired.
2. For a spreadsheet on MOSFET selections, refer to Applications Bulletin AB-8.
REV. 1.0.1 2/4/02
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