AIC1340 Datasheet, PDF (1/7 Pages) Analog Intergrations Corporation – High Performance, Tripple-Ouput, Auto-Tracking Combo Controller

AIC1340
High Performance, Tripple-Ouput, Auto-
Tracking Combo Controller
n ^FEATURES
l Provide Triple Accurate Regulated Voltages
l Optimized Voltage-Mode PWM Control
l Dual N-Channel MOSFET Synchronous Drivers
l Fast Transient Response
l Adjustable Over Current Protection using R_DS(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
n ^APPLICATIONS
l Advanced PC Mboards
l Information PCs
l Servers and Workstations
l Internet Appliances
l PC Add-On Cards
l DDR Termination.
n ^{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.
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: [phone]
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
FAX: [phone]
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