AIC1568 AIC [Analog Intergrations Corporation], AIC1568 Datasheet

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AIC1568

Manufacturer Part Number
AIC1568
Description
4-bit DAC, Simple PWM Power Regulator
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AIC1568CS
Manufacturer:
N/A
Quantity:
20 000
Analog Integrations Corporation
DS-1568-00
FEATURE
APPLICATIONS
Compatible with HIP6008.
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
PC
High-Power 5V to 3.xV DC/DC Regulators.
Low-Voltage Distributed Power Supplies.
and Alpha
Microprocessors.
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
,
Pentium Pro
4-bit DAC, Simple PWM Power Regulator
,
Power
FAX: 886-3-5772510
DESCRIPTION
The AIC1568 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. Featuring a digitally
programmable switching regulator, the AIC1568
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 AIC1568 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.
The AIC1568 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.
www.analog.com.tw
AIC1568
1

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AIC1568 Summary of contents

Page 1

... Pentium Pro Power FAX: 886-3-5772510 DESCRIPTION The AIC1568 is a high power, high efficiency switching regulator controller optimized for high performance microprocessor applications designed to drive an N-channel MOSFET in a standard buck topology. Featuring a digitally programmable switching regulator, the AIC1568 ...

Page 2

... ORDERING INFORMATION AIC1568 XX PACKAGE TYPE S: SMALL OUTLINE TEMPERATURE RANGE C: 0°C~70°C TYPICAL APPLICATION CIRCUIT 1000P 2.2K C8 OCSET 0.1µF SS VID0 VID1 VID2 VID3 JUMPER COMP FB C7 33P C6 R6 90.9K 1000P Switching Regulator for Pentium ORDER NUMBER AIC1568CS (PLASTIC SO 0.1µF 1µF ...

Page 3

... Maximum Storage Temperature Range ………………………..........…......... -65°C ~150°C Maximum Lead Temperature (Soldering 10 Sec) ……………..…………......…......... 300°C Note 1: θ is measured with the component mounted on an evaluation PC board in free air. JA TEST CIRCUIT Refer to TYPICAL APPLICATION CIRCUIT. AIC1568 3 ...

Page 4

... VSEN OCSET V =0V 50mV PHASE FB DAC 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 PGOOD AIC1568 MIN. TYP. MAX VCC 7 8.5 1.26 170 200 230 -20 +20 ∆V 1.5 OSC -1.5 +1.5 76 GBW UGATE R 5 ...

Page 5

... OCSET MOSFET on- PIN 5: VID2 ) jointly set the PIN 6: VID3 × R OCSET ) of the internal pin. Connect a AIC1568 − − − − + OVER CURRENT I OCSET 200µA CONTROL LOGIC An internal 10µA current source provides soft start function for the converter 4-bit DAC voltage select pin. TTL inputs used to set the internal voltage reference VDAC ...

Page 6

... FB pin to inverting PIN 16: VSEN - Converter output voltage sense pin. good indicator pin. AIC1568 the PHASE pin to source of the external MOSFET. This pin detects the voltage drop across the MOSFET R for over-current protection. DS(ON) Connect this pin to gate of the external MOSFET. MOSFET driver supply pin ...

Page 7

... PHYSICAL DIMENSION 16 LEAD PLASTIC SO (150 mil) (unit: mm AIC1568 SYMBOL MIN A 1.35 A1 0.10 B 0.33 C 0.19 D 9.80 10.00 E 3.80 e 1.27 (TYP) H 5.80 L 0.40 MAX 1.75 0.25 0.51 0.25 4.00 6.20 1.27 7 ...

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