AIC AIC1580LCS, AIC1580LCN, AIC1580CS, AIC1580 Datasheet
AIC1580/L
Simple PWM Power Regulator with Shutdown
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.
Low Shutdown Current
Built-in Soft Start.
APPLICATIONS
Power Supply for Motherboard V
Power Supply for Motherboard V
High-Power 5V to 3.xV DC/DC Regulators.
Low-Voltage Distributed Power Supplies.
(1.5V Output)
GTL
.
I/O
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 small external components while
maintaining high conversion efficiency. The
11MHz bandwidth and 6V/µS slew rate of the
error amplifier ensures high converter
bandwidth and fast transient response.
power supply applications.
I/O
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
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw
DS-1580-00 Sep 5, 00 TEL: 886-3-5772500 FAX: 886-3-5772510
requirement.
OUT
1
ORDERING INFORMATION
A
AIC1580 XXX
TYPICAL APPLICATION CIRCUIT
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C=0°C~+70°C
REFERENCE VOLTAGE
DEFAULT: 2.00V
L: 1.30V
ORDER NUMBER
AIC1580CN
AIC1580LCN
(PLASTIC DIP)
AIC1580CS
AIC1580LCS
(PLASTIC SO)
AIC1580/L
PIN CONFIGURATION
TOP VIEW
OCSET
1
2
SD
COMP
3
FB*
4
*AIC1580: 2.00V
IC1580L: 1.30V
8
7
6
5
VCC
UGATE
PHASE
GND
VID0
VID1
VID2
VID3
R6
90.9K
C7
33P
C6
1000P
R7
6.04K
R8
30.1K
R4
15.0K
R3
7.5K
C9
1000P
R2
2.2K
AIC1580
SD
COMP
FB GND
VCCCLSET
UDRI
PHASE
*C1 MUST BE VERY CLOSE TO VCC PIN
R1
10
C1
1U
R9
5K
R5
3.01K
12V
M1
IR3303
D1
SRA1620
+
L1
1.5U
C3
3000UF
L2
7U
+
5V
VOUT
C4
6000UF
Switching Regulator for Pentium
V
Supply
CORE
2
AIC1580/L
Table 1. Output Voltage Program
VID3 VID2 VID1 VID0 VOUT
1 1 1 1 2.00V
1 1 1 0 2.10V
1 1 0 1 2.20V
1 1 0 0 2.30V
1 0 1 1 2.40V
1 0 1 0 2.50V
1 0 0 1 2.60V
1 0 0 0 2.70V
0 1 1 1 2.80V
0 1 1 0 2.90V
0 1 0 1 3.00V
0 1 0 0 3.10V
0 0 1 1 3.20V
0 0 1 0 3.30V
0 0 0 1 3.40V
0 0 0 0 3.50V
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VCC....…...………............................…………......................................... 15V
Input, Output, or I/O Voltage ...............………………....……......... GND - 0.3V to VCC+0.3V
ESD Classification .............................………….....……..............……......................... Class 2
Recommended Operating Conditions
Supply Voltage, V
Ambient Temperature Range .…................................………….……….................. 0°C~70°C
Junction Temperature Range ....…............……….........…..……......................... 0°C~ 100°C
Thermal Information
Thermal Resistance, θ
SOIC Package ...............................………………………..……………........…. 100°C/W
SOIC Package (with 3 in
Maximum Junction Temperature (Plastic Package) ……….……..………................... 150°C
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
....…......................………….......……….................................. 12V ±10%
CC
(Typical, Note 1)
JA
2
of Copper) ……………………………………......….. 90°C/W
TEST CIRCUIT
Refer to TYPICAL APPLICATION CIRCUIT.
3
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