AIC1340 [AIC]
High Performance, Tripple-Ouput, Auto-Tracking Combo Controller; 高性能， TRIPPLE ，输出继电器，自动跟踪组合控制器
| 型号： | AIC1340 |
| 厂家： | 
ANALOG INTERGRATIONS CORPORATION |
| 描述： | High Performance, Tripple-Ouput, Auto-Tracking Combo Controller |
| 文件： | 总7页 (文件大小：114K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
AIC1340
High Performance, Tripple-Ouput, Auto-
Tracking Combo Controller
FEATURES
GENERAL DESCRIPTION
n
n
l Provide Triple Accurate Regulated Voltages
l Optimized Voltage-Mode PWM Control
l Dual N-Channel MOSFET Synchronous Drivers
l Fast Transient Response
The AIC1340 combines a synchronous voltage mode
PWM controller with a low dropout linear regulator
and a linear controller as well as the monitoring and
protection functions in this chip. The PWM control-
ler regulates the output voltage with a synchronous
rectified step-down converter. The built-in N-Channel
MOSFET drivers also help to simplify the design of
step-down converter. It is able to power CPUs,
GPUs, memories, and chipsets. The PWM control-
ler features over current protection using RDS(on). It
improves efficiency and saves cost, as there is no
expensive current sense resistor required.
l Adjustable Over Current Protection using RDS(on)
.
No External Current Sense Resistor Required.
l Programmable Softstart Function
l 200KHz Free-Running Oscillator
l Robust Outputs Auto-Tracking Characteristics
l Sink and Source Capabilities with External Circuit
APPLICATIONS
l Advanced PC Mboards
n
The built-in adjustable linear controller drives an ex-
ternal MOSFET to form a linear regulator that regu-
lates power for system I/O. The built-in adjustable
low dropout linear regulator can supply current up to
500mA for supplying another system I/O. Output
voltage of both linear regulators can also be adjust-
ed by means of the external resistor divider. Both
linear regulators feature current limit. With higher
load current required from the low dropout linear
regulator, the AIC1341 is recommended.
l Information PCs
l Servers and Workstations
l Internet Appliances
l PC Add-On Cards
l DDR Termination.
The Shutdown function is also provided for disable
the combo controller.
Analog Integrations Corporation
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
www.analog.com.tw
DS-1340-00 May 24, 01
TEL: 886-3-5772500 FAX: 886-3-5772510
1
AIC1340
TYPICAL APPLICATION CIRCUIT
n
+12VIN
VCC
+5VIN
GND
4
5
14
OCSET
UGATE
PHASE
+
SS
2
1
VOUT1
+3.3VIN
VIN2
7
+
LGATE
PGND
16
15
GATE3
FB3
10
VOUT3
1.5V
11
+
FB1
VOUT2
VOUT2
FB2
8
6
13
2.5V
+
COMP1
12
14
3
GND
SD
Typical Triple-Output Application
ORDERING INFORMATION
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ORDER NUMBER
PIN CONFIGURATION
AIC1340-XX
PACKAGING TYPE
S: SMALL OUTLINE
AIC1340CS
(SO16)
PHASE
LGATE
16
1
2
3
4
5
6
7
8
UGATE
SD
15 PGND
TEMPERATURE RANGE
14
OCSET
°
°
C: 0 C~+70 C
VCC
SS
13 FB1
12
11
10
9
COMP1
FB3
FB2
GATE3
GND
VIN2
VOUT2
2
AIC1340
ABSOLUTE MAXIMUM RATING
Absolute Maximum Ratings
n
Supply Voltage (VCC).....................................................................................................15V
UGATE.........................................................................................GND - 0.3V to VCC + 0.3V
LGATE .........................................................................................GND - 0.3V to VCC + 0.3V
Input Output and I/O Voltage ....................................................................... GND - 0.3V to 7V
Operating Conditions
Ambient Temperature Range ...............................................................................0° C to 85°C
Maximum Operating Junction Temperature ....................................................................100°C
Supply Voltage, VCC..............................................................................................15V±10%
Thermal Information
Thermal Resistance qJA (°C/W)
SOIC Package..............................................................................................100°C/W
Maximum Junction Temperature (Plastic Package).........................................................150°C
Maximum Storage Temperature Range............................................................. -65°C to 150°C
Maximum Lead Temperature (Soldering 10s)..................................................................300°C
TEST CIRCUIT
Refer to APPLICATION CIRCUIT.
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3
AIC1340
ELECTRICAL CHARACTERISTICS (Vcc=12V, TJ=25°C, Unless otherwise
n
specified)
PARAMETER
TEST CONDITIONS
SYMBOL
MIN.
TYP. MAX. UNIT
VCC SUPPLY CURRENT
ICC
Supply Current
UGATE, LGATE, GATE3 and
VOUT2 open
1.8
3
mA
POWER ON RESET
Rising VCC Threshold
Falling VCC Threshold
VOCSET=4.5V
VOCSET=4.5V
VCCTHR
VCCTHF
VIN2THR
8.6
8.2
2.5
9.5
9.2
2.6
10.4
10.2
2.7
V
V
V
Rising VIN2 Under-Voltage
Threshold
VIN2 Under-Voltage Hystere-
sis
VIN2HYS
VOCSETH
130
1.3
mV
V
Rising VOCSET1 Threshold
OSCILLATOR
Free Running Frequency
F
170
200
1.3
230
KHz
VP-P
Ramp. Amplitude
DVOSC
REFERENCE
FB2 Reference Voltage
VREF2
VREF3
1.240 1.265 1.290
1.250 1.275 1.300
V
V
FB3 Reference Voltage
LINEAR REGULATOR
Regulation
10mA<IOUT2<150mA
FB2 falling
-1
+1
82
%
%
Under-Voltage Level
Over-Current Protection
FB2UV
70
430
570
750
mA
mA
Over-Current Protection
During Start-up
LINEAR CONTROLLER
Regulation
0 < IGATE3 < 10mA
FB3 falling
-2.5
+2.5
80
%
%
Under-Voltage Level
FB3UV
70
4
AIC1340
ELECTRICAL CHARACTERISTICS (Continued)
n
PARAMETER
TEST CONDITIONS
SYMBOL
MIN.
TYP. MAX. UNIT
PWM CONTROLLER ERROR AMPLIFIER
DC GAIN
76
11
6
dB
Gain Bandwidth Product
GBWP
SR
MHz
V/mS
Slew Rate
COMP1=10pF
PWM CONTROLLER GATE DRIVER
Upper Drive Source
Upper Drive Sink
VCC=12V, VUGATE=11V
RUGH
RUGL
RLGH
RLGL
5.2
3.3
4.1
3
6.5
5
W
W
W
W
VCC=12V, VUGATE =1V
VCC=12V, VLGATE=11V
VCC=12V, VLGATE=1V
Lower Drive Source
6
Lower Drive Sink
5
PROTECTION
OCSET Current Source
Soft-Start Current
VOCSET=4.5VDC
IOCSET
ISS
170
200
11
230
1.0
mA
mA
V
Chip Shutdown Soft Start
Threshold
PIN DESCRIPTIONS
n
provides the gate bias charge for
all the MOSFETs controlled by
the IC. Recommended supply
voltage is 12V.
Pin 1: PHASE: Over-current detection pin. Con-
nect the PHASE pin to source of
the
external
high-side
N-
MOSFET. This pin detects the
voltage drop across the high-side
N-MOSFET RDS(ON) for over-
current protection.
Pin 5: SS:
Soft-start pin. Connect a capaci-
tor from this pin to ground. This
capacitor, along with an internal
10mA (typically) current source,
sets the soft-start interval of the
converter.
Pin 2: UGATE: External high-side N-MOSFET
gate drive pin. Connect UGATE
to gate of the external high-side
N-MOSFET.
Pulling this pin low will shut down
the IC.
Pin 3: SD:
To shut down the system, active
high or floating.
Pin 6: FB2:
Connect this pin to a resistor di-
vider to set the linear regulator
output voltage.
Pin 4: VCC:
The chip power supply pin. It also
5
AIC1340
Pin 7: VIN2:
This pin supplies power to the in-
ternal regulator. Connect this pin
to a suitable 3.3V source.
pin is connected to error amplifier
output and PWM comparator. An
RC network is connected to FB1
in to compensate the voltage
control feedback loop of the con-
verter.
Additionally, this pin is used to
monitor the 3.3V supply. If, fol-
lowing a start-up cycle, the volt-
age drops below 2.6V (typically),
the chip shuts down. A new soft-
start cycle is initiated upon return
of the 3.3V supply above the un-
der-voltage threshold.
Pin 13: FB1
The error amplifier inverting input
pin. the FB1 pin and COMP1 pin
are used to compensate the volt-
age-control feedback loop.
Pin 14: OCSET: Current limit sense pin. Connect
a resistor R from this pin to
Pin 8: VOUT2: Output of the linear regulator.
Supplies current up to 500mA.
OCSET
the drain of the external high-side
N-MOSFET. ROCSET, an internal
200mA current source (IOCSET),
and the upper N-MOSFET on-
resistance (RDS(ON)) set the over-
current trip point according to the
following equation:
Pin 9: GND:
Signal GND for IC. All voltage
levels are measured with respect
to this pin.
Pin 10: GATE3: Linear Controller output drive pin.
This pin can drive either a Dar-
lington NPN transistor or a N-
channel MOSFET.
I
OCSET ´ ROCSET
I
PEAK
=
RDS(ON)
Pin 11: FB3
Negative feedback pin for the
linear controller error amplifier
connect this pin to a resistor di-
vider to set the linear controller
output voltage.
Pin 15: PGND: Driver power GND pin. PGND
should be connected to a low im-
pedance ground plane in close to
lower N-MOSFET source.
Pin 16: LGATE: Lower N-MOSFET gate drive pin.
Pin 12: COMP1 External compensation pin. This
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AIC1340
PACKAGE DIMENSIONS
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l
16 LEAD PLASTIC SO (300 mil) (unit: mm)
SYMBOL
MIN
2.35
0.10
0.33
0.23
10.10
7.40
MAX
D
A
A1
B
2.65
0.30
0.51
0.32
10.50
7.60
E
H
C
D
E
e
e
1.27(TYP)
A
H
10.00
0.40
10.65
1.27
L
L
B
c
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