AIC1340CS AIC [Analog Intergrations Corporation], AIC1340CS Datasheet

AIC1340CS

Manufacturer Part Number

AIC1340CS

Description

High Performance, Tripple-Ouput, Auto-Tracking Combo Controller

Manufacturer

AIC [Analog Intergrations Corporation]

Datasheet

1.AIC1340CS.pdf (7 pages)

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Download datasheet (115Kb)

Analog Integrations Corporation

DS-1340-00 May 24, 01

www.analog.com.tw

FEATURES

APPLICATIONS

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

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

Advanced PC Mboards

Information PCs

Servers and Workstations

Internet Appliances

PC Add-On Cards

DDR Termination.

TEL: 886-3-5772500

High Performance, Tripple-Ouput, Auto-

4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC

FAX: 886-3-5772510

DS(on)

Tracking Combo Controller

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

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.

GENERAL DESCRIPTION

AIC1340

DS(on)

. It

Related parts for AIC1340CS

AIC1340CS Summary of contents

Page 1

FEATURES 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 External Current Sense Resistor Required. Programmable Softstart Function l ...

Page 2

... PHASE 1 VIN2 7 LGATE 16 GATE3 10 PGND FB3 15 11 FB1 VOUT2 8 13 FB2 6 COMP1 GND SD Typical Triple-Output Application ORDER NUMBER AIC1340CS (SO16) AIC1340 +5VIN + GND VOUT1 + PIN CONFIGURATION PHASE LGATE 16 1 UGATE 15 PGND OCSET VCC 13 FB1 COMP1 ...

Page 3

ABSOLUTE MAXIMUM RATING Absolute Maximum Ratings 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. Operating Conditions Ambient ...

Page 4

ELECTRICAL CHARACTERISTICS specified) PARAMETER VCC SUPPLY CURRENT Supply Current POWER ON RESET Rising VCC Threshold Falling VCC Threshold Rising VIN2 Under-Voltage Threshold VIN2 Under-Voltage Hystere- sis Rising V Threshold OCSET1 OSCILLATOR Free Running Frequency Ramp. Amplitude REFERENCE FB2 Reference ...

Page 5

ELECTRICAL CHARACTERISTICS PARAMETER PWM CONTROLLER ERROR AMPLIFIER DC GAIN Gain Bandwidth Product Slew Rate PWM CONTROLLER GATE DRIVER Upper Drive Source Upper Drive Sink Lower Drive Source Lower Drive Sink PROTECTION OCSET Current Source Soft-Start Current Chip Shutdown Soft ...

Page 6

Pin 7: VIN2: This pin supplies power to the in- ternal regulator. Connect this pin to a suitable 3.3V source. Additionally, this pin is used to monitor the 3.3V supply. If, fol- lowing a start-up cycle, the volt- age drops ...

Page 7

PACKAGE DIMENSIONS l 16 LEAD PLASTIC SO (300 mil) (unit: mm SYMBOL MIN A 2.35 A1 0.10 B 0.33 C 0.23 D 10.10 10.50 E 7.40 e 1.27(TYP) H 10.00 10.65 ...

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