AIC1340
High Performance, Tripple-Ouput, Auto-
Tracking Combo Controller
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FEATURES
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GENERAL DESCRIPTION
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 R
DS(on)
. It
improves efficiency and saves cost, as there is no
expensive current sense resistor required.
Provide Triple Accurate Regulated Voltages
Optimized Voltage-Mode PWM Control
Dual N-Channel MOSFET Synchronous Drivers
Fast Transient Response
Adjustable Over Current Protection using R
DS(on)
.
No External Current Sense Resistor Required.
Programmable Softstart Function
200KHz Free-Running Oscillator
Robust Outputs Auto-Tracking Characteristics
Sink and Source Capabilities with External Circuit
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APPLICATIONS
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Advanced PC Mboards
Information PCs
Servers and Workstations
Internet Appliances
PC Add-On Cards
DDR Termination.
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.
The Shutdown function is also provided for disable
the combo controller.
Analog Integrations Corporation
www.analog.com.tw
DS-1340-00 May 24, 01
TEL: 886-3-5772500
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
FAX: 886-3-5772510
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AIC [ ANALOG INTERGRATIONS CORPORATION ]
