N1164 Datasheet, PDF (1/8 Pages) List of Unclassifed Manufacturers – 5 Bit Programmable Synchronous Buck Converter with Dual LDOs Controller

NIKO-SEM ^{5 Bit Programmable Synchronous Buck}
Converter with Dual LDOs Controller
N1164
GENERAL DESCRIPTION
The N1164 is a 5 bit TTL-compatible input,
digital-to-analog (DAC) programmable, syn-
chronous buck converter with dual LDOs
controller designed specifically to power the
Pentium ^® II as well as the next generation of
P6 family or other high performance core
logic in desktop personal computer and file
servers CPU applications.
The N1164 switching section provides pro-
grammability of output voltage from 1.3V to
2.05V in 50mV steps and 2.0V to 3.5V in 100
mV increments and the linear sections use
external N-Channel power MOSFETs to
provide fixed output voltages of 1.5V for GTL
bus and 2.5V for clock.
The N1164 monitors all the output voltages.
A signal Power-Good signal is issued when
the core is within ±15% of the DAC setting.
Additional features are built-in over-voltage,
over-current protections for the core output
and logic compatible shutdown.
FEATURES
z Synchronous operation with high efficiency
z TTL-compatible 5 bit DAC, output voltage
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
power MOSFETs.
z 200 KHz fixed frequency internal oscillator
z Fast transient response
z Provides 2 regulated voltages, 1.5V and
2.5V for linear section
z Power-Good output voltage monitor
z Over-Voltage and Over-Current protection
z Logic level enable input
z High performance and low cost solution
APPLICATIONS
z Powering Pentium ^® II, III or Deschutes,
K6 and other advanced processor
z High power DC to DC controller with triple
output supplies
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
+
N1164, Motherboard Power Regulation for Computers
1
AUG-03-2001