參數(shù)資料
型號(hào)： FAN5193
廠商： Fairchild Semiconductor Corporation
英文描述： Two Phase Interleaved Synchronous Buck Converter
中文描述： 兩相交錯(cuò)同步降壓轉(zhuǎn)換器
文件頁(yè)數(shù)： 1/21頁(yè)
文件大?。?/td> 524K
代理商： FAN5193
www.fairchildsemi.com
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
Block Diagram
2 3
22
VID0
11
10
14
13
17
16
24
-
+
-
+
OSC
Digital
Control
Power
Good
5-Bit
DAC
VID1
VID2
VID3
VID4
1
4
5
+12V
PWRGD
-
+
ENABLE/SS
VO
GNDA
7
DROOP/E*
18
6
+12V
15
5V Reg
Bypass
23
+12V
+12V +5V
12
+12V +5V
+12V
8
9
21
+12V
Digital
Control
-
+
-
+
19
ILIM
20
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
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
(Voltage Positioning)
Applications
Power supply for Pentium
Power supply for Athlon
VRM for Pentium IV processor
Programmable step-down power supply
IV
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
Droop
for 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.
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