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Part Name(s) : SC1186CSW Semtech
Semtech Corporation
Description : Programmable Synchronous DC/DC Converter, Dual LOW DROPOUT REGULATOR Controller

DESCRIPTION
The SC1186 combines a Synchronous voltage mode Controller with two low-dropout linear regulators providing most of the circuitry necessary to implement three DC/DC Converters for powering advanced microprocessors such as Pentium® II & III.
   
FEATURES
Synchronous design, enables no heatsink solution
• 95% efficiency (switching section)
• 5 bit DAC for output programmability
• Designed for Intel Pentium® ll & III requirements
• 1.5V, 2.5V short circuit protected linear Controllers
• 1.265V ± 1.5% Reference available
   
APPLICATIONS
• Pentium® ll & III microprocessor supplies
• Flexible motherboards
• 1.3V to 3.5V microprocessor supplies
Programmable triple power supplies
   

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Part Name(s) : RT9259A RT9259AGS RT9259APS Richtek
Richtek Technology
Description : 12V Synchronous Buck PWM DC-DC and Linear Power Controller

The RT9259A is a Dual-channel DC/DC Controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a Synchronous buck Controller and an LDO Controller. The Synchronous buck Controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built in to simplify the circuit design and minimize external part count. The LDO Controller drives an external N-MOSFET for lower power requirement.

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Part Name(s) : SC1172 SC1172CSW SC1173 SC1173CSW Semtech
Semtech Corporation
Description : Programmable Synchronous DC/DC Converter WITH LOW DROPOUT REGULATOR Controller

DESCRIPTION
The SC1172/3 combines a Synchronous voltage mode Controller with a low-dropout linear regulator providing most of the circuitry necessary to implement two DC/DC Converters for powering advanced microprocessors such as Pentium® II (Klamath) or Deschutes.

FEATURES
•  Synchronous design, enables no heatsink solution
•  95% efficiency (switching section)
•  5 bit DAC for output programmability
•  On chip power good function
•  Designed for Intel Pentium®II VRM8.1 requirements
•  1.5V or Adj. @ 1% for linear section

APPLICATIONS
•  Pentium®ll or Deschutes microprocessor supplies
•  Flexible motherboards
•  1.3V to 3.5V microprocessor supplies
•  Programmable Dual power supplies

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Part Name(s) : MC33470DW MC33470 Motorola
Motorola => Freescale
Description : Synchronous Rectification DC/DC Converter Programmable Integrated Controller

The MC33470 is a digitally Programmable switching voltage regulator, specifically designed for Microprocessor supply, Voltage Regulator Module and general purpose applications, to provide a high power regulated output voltage using a minimum of external parts. A 5–bit digital–to–analog Converter defines the dc output voltage.

MC33470 Features:
• 5–Bit Digital–to–Analog Converter Allows Digital Control of Output Voltage
• High Speed Response to Transient Load Conditions
• Output Enable Pin Provides On/Off Control
Programmable Soft Start Control
• High Current Output Drives for Synchronous Rectification
• Internally Trimmed Reference with Low Temperature Coefficient
Programmable Overcurrent Protection
• Overvoltage Fault Indication
• Functionally Similar to the LTC1553

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Part Name(s) : MC33470DW MC33470DWG MC33470DWR2 MC33470DWR2G MC33470 ON-Semiconductor
ON Semiconductor
Description : Synchronous Rectification DC/DC Converter Programmable Integrated Controller

The MC33470 is a digitally Programmable switching voltage regulator, specifically designed for Microprocessor supply, Voltage Regulator Module and general purpose applications, to provide a high power regulated output voltage using a minimum of external parts. A 5−bit digital−to−analog Converter defines the dc output voltage.

Features
• 5−Bit Digital−to−Analog Converter Allows Digital Control of Output Voltage
• High Speed Response to Transient Load Conditions
• Output Enable Pin Provides On/Off Control
Programmable Soft−Start Control
• High Current Output Drives for Synchronous Rectification
• Internally Trimmed Reference with Low Temperature Coefficient
Programmable Overcurrent Protection
• Overvoltage Fault Indication
• Functionally Similar to the LTC1553
• Pb−Free Packages are Available*

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Part Name(s) : RC5054A RC5054AM Fairchild
Fairchild Semiconductor
Description : Programmable Synchronous DC-DC Converter Controller for Low Voltage Microprocessors

Description
The RC5054A provides complete control and protection for a DC-DC Converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a Synchronous-rectified buck topology. The RC5054A integrates all of the control, output adjustment, monitoring and protection functions into a single package.

Features
• Drives Two N-Channel MOSFETs
• Operates from +5V Power Input
• Simple Single-Loop Control Design
  - Voltage-Mode PWM Control
• Fast Transient Response
  - High-Bandwidth Error Amplifier
  - Full 0% to 100% Duty Ratio
• Excellent Output Voltage Regulation
• TTL Compatible 5 Bit Digital-to-Analog Output Voltage Selection
  - Wide Range - 1.3VDC to 3.5VDC
  - 0.1V Binary Steps from 2.1VDC to 3.5VDC
  - 0.05V Binary Steps from 1.3VDC to 2.1VDC
• Power-Good Output Voltage Monitor
• Over-Voltage and Over-Current Fault Monitors
  - Does Not Require Extra Current Sensing Element, Uses MOSFET’s RDS(ON)
• Small Converter Size
  - Constant Frequency Operation
  - 200kHz Free-Running Oscillator Programmable from 50kHz to 1MHz

Applications
• Power Supply for Pentium®, Pentium Pro, PowerPC™ and Alpha™ Microprocessors
• High-Power 5V to 3.xV DC-DC Regulators
• Low-Voltage Distributed Power Supplies

 

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Part Name(s) : RT9259C RT9259CGA RT9259CGQV RT9259CGS RT9259CPA RT9259CPQV RT9259CPS Richtek
Richtek Technology
Description : 12V Synchronous Buck PWM DC-DC and Linear Power Controller

General Description
The RT9259C is a Dual-channel DC/DC Controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a Synchronous buck Controller and an LDO Controller. The
Synchronous buck Controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high
efficiency power conversion. The bootstrap diode is builtin to simplify the circuit design and minimize external part count. The LDO Controller drives an external N-MOSFET for lower power requirement.

Features
Single 12V Bias Supply
Support Dual Channel Power Conversion
  One Synchronous Rectified Buck PWM Controller
  One Linear Controller
Both Controllers Drive Low Cost N-MOSFETs
Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz
Small External Component Count
±1% High Accuracy Output Voltage Regulation for Both PWM and LDO Controller
Two Internal VREFPower Support Lower to 0.8V
Adjustable External Compensation
Linear Controller Drives N-MOSFET Pass Transistor
Fully-Adjustable Outputs
Under Voltage Protection for Both Outputs
Over Current Fault Monitor on MOSFET; No Current Sense Resistor is Required.
RoHS Compliant and 100% Lead (Pb)-Free

Applications
Graphic Card GPU, Memory Core Power
Graphic Card Interface Power
Motherboard, Desktop and Servers Chipset and Memory Core Power
IA Equipments
Telecomm Equipments
High Power DC-DC Regulators

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Part Name(s) : RT9259 RT9259GA RT9259GQV RT9259GS RT9259PA RT9259PQV RT9259PS Richtek
Richtek Technology
Description : 12V Synchronous Buck PWM DC-DC and Linear Power Controller

General Description
The RT9259 is a Dual-channel DC/DC Controller specifically designed to deliver high quality power where 12V power source is available. This part consists of a Synchronous buck Controller and an LDO Controller. The Synchronous buck Controller integrates MOSFET drivers that support 12V+12V bootstrapped voltage for high efficiency power conversion. The bootstrap diode is built-in to simplify the circuit design and minimize external part count. The LDO Controller drives an external N-MOSFET for lower power requirement.

Features
Single 12V Bias Supply
Support Dual Channel Power Conversion
  One Synchronous Rectified Buck PWM Controller
  One Linear Controller
Both Controllers Drive Low Cost N-MOSFETs
Adjustable Frequency from 150kHz to 1MHz and Free-Run Frequency at 230kHz
Small External Component Count
Output Voltage Regulation
  PWM Controller : ±1% Accuracy
  LDO Controller : ±2% Accuracy
Two Internal VREFPower Support Lower to 0.8V
Adjustable External Compensation
Linear Controller Drives N-MOSFET Pass Transistor
Fully-Adjustable Outputs
Under Voltage Protection for Both Outputs
Over Current Fault Monitor on MOSFET; No Current Sense Resistor is Required.
RoHS Compliant and 100% Lead (Pb)-Free

Applications
Graphic Card GPU, Memory Core Power
Graphic Card Interface Power
Motherboard, Desktop and Servers Chipset and Memory  Core Power
IA Equipments
Telecomm Equipments
High Power DC-DC Regulators

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Part Name(s) : SC1162 SC1162CSW SC1162CSW.TR SC1163 SC1163CSW SC1163CSW.TR Semtech
Semtech Corporation
Description : Programmable Synchronous DC/DC Converter WITH LOW DROPOUT REGULATOR Controller

DESCRIPTION
The SC1162/3 combines a Synchronous voltage mode Controller with a low-dropout linear regulator providing most of the circuitry necessary to implement two DC/DC Converters for powering advanced microprocessors such as Pentium® II.

FEATURES
Synchronous design, enables no heatsink solution
• 95% efficiency (switching section)
• 5 bit DAC for output programmability
• On chip power good function
• Designed for Intel Pentium® II requirements
• 1.5V or Adj. @ 1% for linear section
• 1.300V-2.05V ±1.5%; 2.100V-3.500V ±2%

APPLICATIONS
• Pentium® ll or Deschutes microprocessor supplies
• Flexible motherboards
• 1.3V to 3.5V microprocessor supplies
Programmable Dual power supplies

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