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What is FAN5093?

This electronic component, produced by the manufacturer "Fairchild Semiconductor", performs the same function as "Two Phase Interleaved Synchronous Buck Converter for VRM 9.x Applications".


FAN5093 Datasheet PDF - Fairchild Semiconductor

Part Number FAN5093
Description Two Phase Interleaved Synchronous Buck Converter for VRM 9.x Applications
Manufacturers Fairchild Semiconductor　
Logo Fairchild Semiconductor Logo　


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www.fairchildsemi.com
FAN5093
Two Phase Interleaved Synchronous Buck Converter
for VRM 9.x Applications
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 transient response time
• Built-in current sharing between phases
• Remote sense
• Programmable Active Droop(Voltage Positioning)
• Programmable switching frequency from 100KHz to
1MHz per phase
• Adaptive delay gate switching
• Integrated high-current gate drivers
• Integrated Power Good, OV, UV, 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 FAN5093 is a synchronous two-phase DC-DC controller
IC which provides a highly accurate, programmable output
voltage for VRM 9.x processors. Two interleaved synchro-
nous 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 FAN5093 features Programmable Active Droopfor
transient response with minimum output capacitance. It has
integrated high-current gate drivers, with adaptive delay gate
switching, eliminating the need for external drive devices.
The FAN5093 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 1%. The FAN5093 uses a high level of integra-
tion to deliver load currents in excess of 50A from a 12V
source with minimal external circuitry.
The FAN5093 also offers integrated functions including
Power Good, Output Enable/Soft Start, under-voltage lock-
out, 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
RT
OSC
5-Bit
DAC
1 23 4 5
VID0 VID2 VID4
VID1 VID3
BYPASS
+12V
6 18
5V Reg
UVL O
+ Digital
- Control
-
+
GNDA
Current
Limit
-
+
-
+
+12V
Power
Good
- Digital
+
Control
+12V
24 19
21 7
PWRGD DROOP/E* AGND
22
ENABLE/SS
20
ILIM
BOOT A
13
14
15
17
16
BOOT B
12
11
10
8
9
+12V
+12V
VO
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. 1.1.0 3/27/03

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FAN5093 equivalent
PRODUCT SPECIFICATION
Gate Drive Test Circuit
VOUT
3000pF
tR
10%
90%
2V
tDT
2V
tF
90%
2.5V
10%
HDRV
tDT
2V LDRV
Figure 1. Output Drive Timing Diagram
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
Note:
1. 0 = VID pin is tied to GND.
1 = VID pin is pulled up to 5V.
REV. 1.1.0 3/27/03
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
FAN5093
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
5


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for FAN5093 electronic component.


Information Total 17 Pages
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