AIC1569
器件描述：5-bit DAC, Synchronous PWM Power Regulator
器件厂商：AIC [Analog Intergrations Corporation]
文件大小：240.78KB，共7页
Sponsor by e络盟器件资料摘要：
AIC1569A
5-bit DAC, Synchronous PWM Power Regulator
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw
DS-1569A-00 TEL: 886-3-5772500 FAX: 886-3-5772510 1
onesansinv FEATURES
tensans Compatible with HIP6004.
tensans Simple Voltage-Mode PWM Control.
tensans Dual N-Channel MOSFET Synchronous Drive.
tensans Fast Transient Response.
tensans ±1% 5-Bit Digital-to-Analog Output Voltage.
tensans Adjustable Current Limit Without External
Sense Resistor.
tensans Full 0% to 100% Duty Ratio.
tensans 200KHz Free-Running Oscillator,
Programmable up to 350KHz.
tensans Power-Good Output Voltage Monitor.
onesansinv APPLICATIONS
tensans Power Supply for Pentium® II, Power® and
Alpha® Microprocessors.
tensans High-Power 5V to 3.xV DC/DC Regulators.
tensans Low-Voltage Distributed Power Supplies.
onesansinv DESCRIPTION
The AIC1569A is a high power, high efficiency
switching regulator controller optimized for high
performance microprocessor applications. It is
designed to drive dual N-channel MOSFETs in a
standard synchronous buck topology. Featuring
a digitally programmable switching regulator, the
AIC1569A includes monitoring and protection
capabilities in addition to all the essential
synchronous PWM control functions.
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
regulation within ±1% over temperature and line
voltage shifts.
The internal oscillator of the AIC1569A 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 an 11MHz
bandwidth and 6V/µS slew rate, which enables
high converter bandwidth for fast transient
response.
The AIC1569A provides adjustable over current
and short circuit protections. It senses the output
current across the on resistance of the upper N-
channel MOSFET without an external low value
sense resistor. It also monitors the output voltage
with a window comparator and issues a power
good signal when the output is within 10% of the
rated output voltage.
5-bit DAC, Synchronous PWM Power Regulator
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw
DS-1569A-00 TEL: 886-3-5772500 FAX: 886-3-5772510 1
onesansinv FEATURES
tensans Compatible with HIP6004.
tensans Simple Voltage-Mode PWM Control.
tensans Dual N-Channel MOSFET Synchronous Drive.
tensans Fast Transient Response.
tensans ±1% 5-Bit Digital-to-Analog Output Voltage.
tensans Adjustable Current Limit Without External
Sense Resistor.
tensans Full 0% to 100% Duty Ratio.
tensans 200KHz Free-Running Oscillator,
Programmable up to 350KHz.
tensans Power-Good Output Voltage Monitor.
onesansinv APPLICATIONS
tensans Power Supply for Pentium® II, Power® and
Alpha® Microprocessors.
tensans High-Power 5V to 3.xV DC/DC Regulators.
tensans Low-Voltage Distributed Power Supplies.
onesansinv DESCRIPTION
The AIC1569A is a high power, high efficiency
switching regulator controller optimized for high
performance microprocessor applications. It is
designed to drive dual N-channel MOSFETs in a
standard synchronous buck topology. Featuring
a digitally programmable switching regulator, the
AIC1569A includes monitoring and protection
capabilities in addition to all the essential
synchronous PWM control functions.
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
regulation within ±1% over temperature and line
voltage shifts.
The internal oscillator of the AIC1569A 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 an 11MHz
bandwidth and 6V/µS slew rate, which enables
high converter bandwidth for fast transient
response.
The AIC1569A provides adjustable over current
and short circuit protections. It senses the output
current across the on resistance of the upper N-
channel MOSFET without an external low value
sense resistor. It also monitors the output voltage
with a window comparator and issues a power
good signal when the output is within 10% of the
rated output voltage.