AIC1567
5-bit DAC, Synchronous PWM Power Regulator
with Linear Controller
FEATURES
Switching Regulator and Low Dropout Linear
Regulator on single chip.
Simple Voltage-Mode PWM Control.
Dual N-Channel MOSFET Synchronous Drive.
Fast Transient Response.
±1.0%
5-Bit Digital-to-Analog Output Voltage.
Adjustable Current Limit Without External Sense
Resistor.
Full 0% to 100% Duty Ratio.
200KHz Free-Running Oscillator Programmable
up to 350KHz.
Power-Good Output Voltage Monitor.
Short Circuit Protection with Low Short Circuit
Output Current.
The internal 5-bit Digital-to-Analog Converter
(DAC) adjusts the output voltage from 2.0V to
3.5V in 0.1V increments and 1.3V to 2.0V in
0.05V increments. The precision reference and
voltage-mode
control
can
provide
output
DESCRIPTION
The AIC1567 is a high power, high efficiency
switching regulator controller optimized for high
performance microprocessor applications. It is
designed to drive dual N-channel MOSFET in a
standard
synchronous
buck
topology.
Featuring a low dropout linear regulator and a
digitally programmable switching regulator, the
AIC1567 includes monitoring and protection
capabilities in addition to all the essential
synchronous PWM control functions.
APPLICATIONS
Power Supply for Pentium II, Power PC and
Alpha Microprocessors.
High-Power 5V to 3.xV DC/DC Regulators.
Low-Voltage Distributed Power Supplies.
regulation within
±1.0%
over temperature and
line voltage shifts.
The internal oscillator of the AIC1567 free-runs
at 200KHz and can be adjusted up to 350KHz.
The resulting PWM duty ratio ranges from 0% to
100%. The error amplifier features a 11MHz
bandwidth and 6V/µS slew rate, which enables
high converter bandwidth for fast transient
response.
Analog Integrations Corporation
DS-1567-00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
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AIC [ ANALOG INTERGRATIONS CORPORATION ]
