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N1164 Datasheet

5 Bit Programmable Synchronous Buck Converter with Dual LDOs Controller

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NIKO-SEM 5 Bit Programmable Synchronous Buck
Converter with Dual LDOs Controller
N1164
GENERAL DESCRIPTION
FEATURES
The N1164 is a 5 bit TTL-compatible input,
z Synchronous operation with high efficiency
digital-to-analog (DAC) programmable, syn-
z TTL-compatible 5 bit DAC, output voltage
chronous buck converter with dual LDOs
controller designed specifically to power the
Pentium ® II as well as the next generation of
selection from 1.3V to 3.5V programmable
z High current totem pole output, up to 2 A
for direct driving of the external N-Channel
P6 family or other high performance core
logic in desktop personal computer and file
power MOSFETs.
z 200 KHz fixed frequency internal oscillator
servers CPU applications.
z Fast transient response
The N1164 switching section provides pro-
z Provides 2 regulated voltages, 1.5V and
grammability of output voltage from 1.3V to
2.5V for linear section
2.05V in 50mV steps and 2.0V to 3.5V in 100
z Power-Good output voltage monitor
mV increments and the linear sections use
external N-Channel power MOSFETs to
z Over-Voltage and Over-Current protection
z Logic level enable input
provide fixed output voltages of 1.5V for GTL
z High performance and low cost solution
bus and 2.5V for clock.
The N1164 monitors all the output voltages. APPLICATIONS
A signal Power-Good signal is issued when
the core is within ±15% of the DAC setting.
z Powering Pentium ® II, III or Deschutes,
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TYPICAL APPLICATION
12V
+
N1164
ENABLE
VID 0~4
POWER-GOOD
LINEAR
SECTION
SWITCHING
SECTION
3.3V
+
5V
+
VCORE
+
1.5V
GTC BUS
+
2.5V
CLOCK
+
DataSheet4U.com
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N1164, Motherboard Power Regulation for Computers
1 AUG-03-2001
ETC
ETC



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