AIC1566 AIC [Analog Intergrations Corporation], AIC1566 Datasheet

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AIC1566

Manufacturer Part Number
AIC1566
Description
4-bit DAC, Simple PWM Power Regulator With Linear Controller
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet
Analog Integrations Corporation
DS-1566-00
FEATURES
APPLICATIONS
Switching Regulator and Low Dropout Linear
Regulator on Single Chip.
Simple Voltage-Mode PWM Control.
Fast Transient Response.
±1.5% 4-Bit Digital-to-Analog Output Voltage.
Adjustable Current Limit Without External Sense
Resistors.
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.
Power Supply for Pentium, Pentium Pro, Power
PC, and Alpha Microprocessors.
High-Power 5V to 3.xV DC/DC Regulators.
Low-Voltage Distributed Power Supplies.
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
4-bit DAC, Simple PWM Power Regulator With
FAX: 886-3-5772510
DESCRIPTION
The AIC1566 is a high power, high efficiency
switching regulator controller optimized for high
performance microprocessor applications. It is
designed to drive an N-channel MOSFET in a
standard buck topology.
dropout
programmable switching regulator, the AIC1566
includes monitoring and protection capabilities in
addition to all the essential PWM control
functions.
The internal 4-bit Digital-to-Analog Converter
(DAC) adjusts the output voltage from 2.0V to
3.5V in 0.1V increments. The precision reference
and voltage-mode control can provide output
regulation within ±1.5% over temperature and line
voltage shifts.
The internal oscillator of the AIC1566 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
performance.
The AIC1566 provides adjustable over current
and short circuit protections. It senses the output
current across the on resistance of the 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.
linear
bandwidth
regulator
Linear Controller
for
and
Featuring a low
www.analog.com.tw
fast
AIC1566
a
transient
digitally
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AIC1566 Summary of contents

Page 1

... The internal oscillator of the AIC1566 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/µ ...

Page 2

... ORDERING INFORMATION AIC1566 XX PACKAGE TYPE S: SMALL OUTLINE TEMPERATURE RANGE C: 0°C~70°C TYPICAL APPLICATION CIRCUIT C8 OCSET 0.1µF SS VID0 VID1 VID2 VID3 COMP C7 FB CLP+ 33pF CLN R6 C6 90.9K 1000pF Pentium ORDER NUMBER AIC1566CS (PLASTIC SO) C9 1000pF 2. 0.1µF 1µF VSEN RT/OVP ...

Page 3

... DACOUT Voltage Accuracy Oscillator Free Running Frequency Total Variation Ramp Amplitude (VCC= 12V, Ta=25° ° ° ° C, unless otherwise TEST CONDITIONS SYMBOL UGATE Open V =4.5V OCSET RT Open ≤200KΩ 6K≤ Open AIC1566 MIN. TYP. MAX VCC 7 8.5 1.26 -1.5 +1.5 170 200 230 -20 +20 ∆ ...

Page 4

... SYMBOL MIN. TYP. MAX. 76 GBW UGATE R 5.5 10 UGATE 106 115 125 I 170 200 230 OCSET I 30 OVP 130 65 106 114 0.5 PGOOD 1.18 1.21 1. AIC1566 UNIT dB MHz V/µS Ω Ω % µA mA µA µ ...

Page 5

... COMP CLP + - + CLN - 20mV POWER-ON RESET 115 OVP 110 POWER GOOD 90 50 SOFT START + + + - - ERROR PWM AMP COMPARATOR OSCILLATOR CURRENT SENSE AMP. AIC1566 + - OVER 200µA CURRENT CONTROL LOGIC LINEAR AMP. 1. VCC PGOOD OCSET PHASE BOOT UGATE GND RT/OVP LIDRI VLFB 5 ...

Page 6

... GND for the upper gate driver. PGOOD is an open drain output. This pin is pulled low when the converter output is 10% out of the VDAC reference voltage. Connect the PHASE pin to source of MOSFET. This pin detects the voltage drop MOSFET R DS(ON) AIC1566 VDAC 3.5V 3.4V 3.3V 3.2V 3.1V 3.0V 2.9V 2.8V 2.7V 2.6V 2.5V 2.4V 2.3V 2 ...

Page 7

... PHYSICAL DIMENSIONS 20 LEAD PLASTIC SO (300 mil) (unit: mm SYMBOL AIC1566 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 13.00 7.60 10.65 1.27 7 ...

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