AIC1569 AIC [Analog Intergrations Corporation], AIC1569 Datasheet

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AIC1569

Manufacturer Part Number
AIC1569
Description
5-bit DAC, Synchronous PWM Power Regulator
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet

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Analog Integrations Corporation
DS-1569A-00
FEATURES
APPLICATIONS
Compatible with HIP6004.
Simple Voltage-Mode PWM Control.
Dual N-Channel MOSFET Synchronous Drive.
Fast Transient Response.
±1% 5-Bit Digital-to-Analog Output Voltage.
Adjustable Current Limit Without External
Sense Resistor.
Full 0% to 100% Duty Ratio.
200KHz
Programmable up to 350KHz.
Power-Good Output Voltage Monitor.
Power Supply for Pentium® II, Power® and
Alpha® Microprocessors.
High-Power 5V to 3.xV DC/DC Regulators.
Low-Voltage Distributed Power Supplies.
Free-Running
5-bit DAC, Synchronous PWM Power Regulator
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
Oscillator,
FAX: 886-3-5772510
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
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.
DESCRIPTION
control
can
AIC1569A
provide
www.analog.com.tw
output
1

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AIC1569 Summary of contents

Page 1

... Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC DS-1569A-00 TEL: 886-3-5772500 DESCRIPTION The AIC1569A is a high power, high efficiency switching regulator controller optimized for high performance microprocessor applications designed to drive dual N-channel MOSFETs in a standard synchronous buck topology. Featuring ...

Page 2

... ORDERING INFORMATION AIC1569A XX PACKAGE TYPE S: SMALL OUTLINE TEMPERATURE RANGE C: 0°C~70°C TYPICAL APPLICATION CIRCUIT C8 0.1 µ F VID0 VID1 VID2 VID3 VID4 C7 33pF C6 R6 90.9K 1000pF DC/DC Converter for Pentium ORDER NUMBER AIC1569ACS (PLASTIC SO) C9 1000pF R2 2.2K C2 VSEN RT 0.1µF OCSET OVP SS VCC VID0 LGATE ...

Page 3

... Copper) ……………..………………………......….. 90°C /W (VCC= 12V, Ta=25° ° ° ° C, unless otherwise specified.) TEST CONDITIONS UGATE Open V =4.5V OCSET RT Open 6KΩ<R <200KΩ Open AIC1569A SYMBOL MIN. TYP. MAX. UNIT I 1 VCC 8.2 9.3 10.2 1.26 ...

Page 4

... V =0V, OCSET PHASE V =VDAC - 50mV FB V =0, V =5.0V, VSEN OCSET V =0V, V =0V PHASE FB V Rising VSEN V Falling VSEN Upper and Lower threshold I =5mA V PGOOD AIC1569A TYP. MAX. UNIT -1.0 +1.0 76 GBW 5.8 12 UGATE 4.4 10 UGATE R 4.7 12 LGATE R 3.0 10 LGATE 106 115 125 I 170 ...

Page 5

... POWER GOOD 90% + − 50% + − SOFT START + + − − PWM COMPARATOR OSCILLATOR PIN 3:SS from this pin to the ) DS(ON) trip AIC1569A + − OVER I CURRENT OCS 200µA CONTROL LOGIC VCC equation: × OCS OCSET = I PEAK pin voltage is sensed to be ...

Page 6

... VID0 VDAC PIN 16:PGND - Driver power GND pin. PGND should 0 3.5V 1 3.4V 0 3.3V 1 3.2V PIN 17:LGATE - Lower N-MOSFET gate driver pin. 0 3.1V PIN 18: VCC 1 3.0V 0 2.9V 1 2.8V 0 2.7V 1 2.6V PIN 19:OVP 0 2.5V 1 2.4V 0 2.3V AIC1569A ...

Page 7

... Connecting a resistor (RT) from this pin to GND, increase the frequency by the following equation. ≅ F 200 KHz S PHYSICAL DIMENSIONS 20 LEAD PLASTIC SO (300 mil) (unit: mm adjustment pin. 5 × log AIC1569A SYMBOL MIN A 2.35 A1 0.10 B 0.33 C 0.23 D 12.60 E 7.40 e 1.27(TYP) H 10.00 L 0.40 MAX 2.65 0.30 0.51 0.32 13 ...

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