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What is FAN5193?

This electronic component, produced by the manufacturer "Fairchild Semiconductor", performs the same function as "Two Phase Interleaved Synchronous Buck Converter".


FAN5193 Datasheet PDF - Fairchild Semiconductor

Part Number FAN5193
Description Two Phase Interleaved Synchronous Buck Converter
Manufacturers Fairchild Semiconductor　
Logo Fairchild Semiconductor Logo　


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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

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FAN5193 equivalent
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
0.5mΩ trace 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


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Featured Datasheets

Part NumberDescriptionMFRS
FAN5193The function is Two Phase Interleaved Synchronous Buck Converter. Fairchild SemiconductorFairchild Semiconductor

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