AIC1580LCN Analog Intergrations Corporation, AIC1580LCN Datasheet

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AIC1580LCN

Manufacturer Part Number
AIC1580LCN
Description
Manufacturer
Analog Intergrations Corporation
Datasheet
Analog Integrations Corporation
DS-1580-00
Operation Voltage up to 15V.
Simple Voltage-Mode PWM Control.
Fast Transient Response.
2V and 1.3V ± 2% Feedback Voltage Reference
Option.
Adjustable Current Limit without External Sense
Resistors.
200KHz Free-Running Oscillator.
Short-Circuit Protection with Low Short Circuit
Output Current.
Low Shutdown Current
Built-in Soft Start.
Power Supply for Motherboard V
Power Supply for Motherboard V
High-Power 5V to 3.xV DC/DC Regulators.
Low-Voltage Distributed Power Supplies.
FEATURES
APPLICATIONS
Sep 5, 00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
Simple PWM Power Regulator with Shutdown
GTL
I/O
.
(1.5V Output)
FAX: 886-3-5772510
DESCRIPTION
The AIC1580 is a high-power, high-efficiency
voltage-mode switching regulator controller for
motherboard V
Designed to drive a N-channel MOSFET in a
standard buck topology, the AIC1580 features a
high voltage CMOS output driver, short-circuit
protection, and 8-pin package.
An external 4-bit Digital-to-Analog Converter
(DAC) can be used along with the AIC1580 to
adjust the output voltage from 2.0V to 3.5V in
0.1V increments. Table 1 on the following page
specifies the corresponding output voltage for
16 combinations of DAC inputs as in the typical
application circuit.
The 200KHz switching frequency allows for
using
maintaining high conversion efficiency. The
11MHz bandwidth and 6V/µS slew rate of the
error
bandwidth and fast transient response.
The AIC1580 provides adjustable overcurrent
and short-circuit protections by sensing the
output current across the on resistance of the
external N-channel MOSFET rather than an
external low value sense resistor.
The AIC1580L provides lower reference voltage
(1.30V) than the default (2.00V, AIC1580) for
lower V
OUT
amplifier
small
requirement.
I/O
external
power supply applications.
ensures
components
AIC1580/L
high
www.analog.com.tw
converter
while
1

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AIC1580LCN Summary of contents

Page 1

FEATURES Operation Voltage up to 15V. Simple Voltage-Mode PWM Control. Fast Transient Response. 2V and 1.3V ± 2% Feedback Voltage Reference Option. Adjustable Current Limit without External Sense Resistors. 200KHz Free-Running Oscillator. Short-Circuit Protection with Low Short Circuit Output Current. ...

Page 2

... FB C7 33P C6 R6 90.9K 1000P R7 6.04K VID0 R8 30.1K VID1 R4 15.0K VID2 R3 7.5K VID3 Switching Regulator for Pentium ORDER NUMBER AIC1580CN AIC1580LCN (PLASTIC DIP) AIC1580CS AIC1580LCS (PLASTIC SO) *C1 MUST BE VERY CLOSE TO VCC PIN VCC M1 UDRI PHASE IR3303 GND 3.01K     ...

Page 3

Table 1. Output Voltage Program VID3 ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ....…...………............................…………......................................... 15V CC Input, Output, or I/O Voltage ...............………………....……......... GND - 0.3V ...

Page 4

ELECTRICAL CHARACTERISTICS specified.) PARAMETER VCC Supply Current Nominal Supply Power-On Reset V Threshold CC Oscillator Frequency Duty Cycle Internal Reference Voltage Reference Voltage Error Amplifier DC Gain Gain-Bandwidth Product Slew Rate Gate Driver Upper Gate Source Upper Gate Sink Protection ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs. Load Current 100 Vo=3. (A) OUT Over-Current Operation Transient Response Vo=1.3V 200 Vo=2.0V 198 196 194 192 ...

Page 6

BLOCK DIAGRAM SD Built-In Soft Start REF FB COMP PIN DESCRIPTIONS PIN 1: OCSET - Current limit sense pin. Connect a resistor R OCSET the drain MOSFET. R OCSET 200 µ A current source (I and the external MOSFET on- ...

Page 7

APPLICATION CIRCUIT C9 1000P R2 CLSET SD COMP C7 33P 90.9K 1000P R7 13K PHYSICAL DIMENSIONS 8 LEAD PLASTIC SO (unit: mm *C1 1µF *C1 must be very close 2.2K ...

Page 8

LEAD PLASTIC DIP (unit: mm SYMBOL AIC1580/L MIN MAX 0.381 — 2.92 4.96 0.35 0.56 0.20 0.36 9.01 10.16 ...

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