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Part Name(s) : SC1144 SC1144ABCSW SC1144ABCSWTR Semtech
Semtech Corporation
Description : PROGRAMMABLE, HIGH PERFORMANCE MULTI-PHASE, PWM CONTROLLER View

DESCRIPTION
The SC1144 is a HIGH PERFORMANCE, MULTI-PHASE (PWM) CONTROLLER designed for HIGH power microprocessors requiring ultra fast transient response, such as the Pentium®ll and beyond. Utilizing a novel and unique design, the CONTROLLER distributes the output load across (up to) four converter channels by digitally phase shifting the PWM outputs. This approach greatly reduces the stress and heat on the output stage components while lowering input ripple current by as much as 80%. Accurate current sharing among the four phases is achieved by precision design techniques and trimming of critical elements.

FEATURES
• Allows use of small surface mount components
• Ultra fast transient recovery time
• Wide, HIGH frequency operating range
• Selectable 2, 3, 4 phase operation
• Floating feedback ground for remote sensing
• Precision load current sharing
• Selectable internal or external clock
• Soft start, Over current protection
• 5-bit DAC PROGRAMMABLE output
PROGRAMMABLE clock, 200Khz-2Mhz per phase

APPLICATIONS
HIGH end servers and workstations
HIGH current/Ultra-fast transient microprocessors
• Voltage Regulator Modules

 

Part Name(s) : SC1146 SC1146CSW.TR Semtech
Semtech Corporation
Description : VRM9.0 PROGRAMMABLE, MULTI-PHASE, HIGH PERFORMANCE PWM CONTROLLER View

DESCRIPTION
The SC1146 is the latest, HIGH PERFORMANCE, multi phase (PWM) CONTROLLER designed for HIGH power microprocessors requiring ultra fast transient response. The SC1146 is PROGRAMMABLE for the voltage range required by the latest Microprocessors . Utilizing a novel and unique design, the CONTROLLER distributes the output load across (up to) four converter channels by digitally phase shifting the PWM outputs. This approach greatly reduces the stress and heat on the output stage components while lowering input ripple current by as much as 80%. Accurate current sharing among the four phases is achieved by precision design techniques and trimming of critical elements.

FEATURES
• Allows use of small surface mount components
• Ultra fast transient recovery time
• Dramatic reduction of input ripple current and output ripple voltage
• 5-bit PROGRAMMABLE DAC for the latest, lower output voltage Microprocessors
• Wide, HIGH frequency operating range
• Selectable 2, 3, 4 phase operation
• +5 Volt only operation eliminates the need for
+12V supply
• Precision load current sharing,1%PWM match
• Selectable internal or external clock
• Soft start/UVLO/Over current protection

APPLICATIONS
HIGH end servers and workstations
HIGH current/Ultra-fast transient microprocessors

Part Name(s) : LM2639 LM2639M LM2639MX LM2639EVAL National-Semiconductor
National ->Texas Instruments
Description : 5-Bit PROGRAMMABLE, HIGH Frequency MULTI-PHASE PWM CONTROLLER View

General Description
The LM2639 provides an attractive solution for power supplies of HIGH power microprocessors (such as Pentium II™, M II™, K6™-2, K6™-3, etc.) exhibiting ultra fast load transients. Compared to a conventional single-phase supply, an LM2639 based MULTI-PHASE supply distributes the thermal and electrical loading among components in multiple phases and greatly reduces the corresponding stress in each component. The LM2639 can be programmed to control either a 3-phase converter or a 4-phase converter.
   
Features
■ Ultra fast load transient response
■ Enables all surface-mount-design
■ Selectable 2, 3, 4 phase operation
■ Clock frequency from 40 kHz to 10 MHz
■ Precision load current sharing
■ 5-bit PROGRAMMABLE from 3.5V to 1.3V
■ VID code compatible to VRM 8.X specification
■ Output voltage is 2.0V for VID code 11111
■ Selectable internal or external clock
■ Digital 16-step soft start
■ Input under-voltage lock-out, over-current protection
   
Applications
■ Servers and workstations
HIGH current, ultra-fast transient microprocessors
   

Part Name(s) : RT8856 RT8856GQW Richtek
Richtek Technology
Description : MULTI-PHASE PWM CONTROLLER for CPU Core Power Supply View

General Description
The RT8856 is a single/dual phase PWM CONTROLLER with two integrated MOSFET drivers. Moreover, it is compliant with Intel IMVP6.5 Voltage Regulator Specification to fulfill its mobile CPU Vcore power supply requirements. The RT8856 adopts NAVPTM(Native AVP) which is Richteks proprietary topology derived from finite DC gain compensator peak current mode, making it an easy setting PWM CONTROLLER that meets all Intel AVP (Active Voltage Positioning) mobile CPU requirements.

Features
● 1/2 Phase PWM CONTROLLER with 2 Integrated
   MOSFET Drivers
● IMVP6.5 Compatible Power Management States
   (DPSRLVR, PSI, Extended Deeper Sleep Mode)
● NAVP (Native AVP) Topology
● 7-bit DAC
● 0.8% DAC Accuracy
● Fixed VBOOT (1.1V)
● Differential Remote Voltage Sensing
PROGRAMMABLE Output Transition Slew Rate Control
● Accurate Current and Thermal Balance
● System Thermal Compensation AVP
● Ringing Free Mode at Light Load Conditions
● Fast Transient Response
● Power Good
● Clock Enable Output
● Thermal Throttling
● Current Monitor Output
● Switching Frequency up to 1MHz Per Phase
● OVP, UVP, NVP, OCP, OTP, UVLO
● 40-Lead WQFN Package
● RoHS Compliant and Halogen Free

Applications
● IMVP6.5 Core Supply
MULTI-PHASE CPU Core Supply
● AVP Step-Down Converter
● Notebook/ Desktop Computer/ Servers


Part Name(s) : RT9248 RT9248PC RT9248GC Richtek
Richtek Technology
Description : MULTI-PHASE PWM CONTROLLER for CPU Core Power Supply View

General Description
The RT9248 is a MULTI-PHASE buck DC/DC CONTROLLER integrated with all control functions for GHz CPU VRM The RT9248 controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The MULTI-PHASE architecture provides HIGH output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The HIGH equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient.

Features
MULTI-PHASE Power Conversion with Automatic Phase Selection
• VRM9 & VRD10 DAC Output with Active Droop Compensation for Fast Load Transient
• Smooth VCORE Transition at VID Jump
• Multi-Level VID125 Input for VRM9 & VRD10 Selection
• Power Stage Thermal Balance by RDS(ON) Current Sense
• Hiccup Mode Over-Current Protection
PROGRAMMABLE Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
HIGH Ripple Frequency Times Channel Number
• RoHS Compliant and 100% Lead (Pb)-Free

Applications
• Intel® Processors Voltage Regulator: VRM9 and VRD10
• Low Output Voltage, HIGH Current DC-DC Converters
• Voltage Regulator Modules

Part Name(s) : RT9246A RT9246APC RT9246AGC Richtek
Richtek Technology
Description : MULTI-PHASE PWM CONTROLLER for CPU Core Power Supply View

General Description
The RT9246A is a MULTI-PHASE buck DC/DC CONTROLLER integrated with all control functions for GHz CPU VRM. The RT9246A controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The MULTI-PHASE architecture provides HIGH output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The HIGH equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient.

Features
MULTI-PHASE Power Conversion with Automatic Phase Selection
• K8 DAC Output with Active Droop Compensation for Fast Load Transient
• Smooth VCORE Transition at VID Jump
• Power Stage Thermal Balance by Inductor DCR Current Sense
• Hiccup Mode Over-Current Protection
PROGRAMMABLE Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
HIGH Ripple Frequency Times Channel Number
• RoHS Compliant and 100% Lead (Pb)-Free

Applications
• AMD® AthlonTM 64 and OpteronTM Processors Voltage Regulator
• Low Output Voltage, HIGH Current DC-DC Converters
• Voltage Regulator Modules

Part Name(s) : RT9248A RT9248APC RT9248AGC Richtek
Richtek Technology
Description : MULTI-PHASE PWM CONTROLLER for CPU Core Power Supply View

General Description
The RT9248A is a cost-effective MULTI-PHASE buck DC/DC CONTROLLER integrated with all control functions for GHz CPU VRM. The RT9248A controls 2 or 3 buck switching stages operating in interleaved phase set automatically. The multiphase architecture provides HIGH output current while maintaining low power dissipation on power devices and low stress on input and output capacitors. The HIGH equivalent operating frequency also reduces the component dimension and the output voltage ripple in load transient.

Features
MULTI-PHASE Power Conversion with Automatic Phase Selection
• VRM9 & VRD10 DAC Output with Active Droop Compensation for Fast Load Transient
• Smooth VCORE Transition at VID Jump
• Multi-Level VID125 Input for VRM9 & VRD10 Selection
• Power Stage Thermal Balance by RDS(ON) Current Sense
• Hiccup Mode Over-Current Protection
PROGRAMMABLE Switching Frequency (50kHz to 400kHz per Phase), Under-Voltage Lockout and Soft-Start
HIGH Ripple Frequency Times Channel Number
• RoHS Compliant and 100% Lead (Pb)-Free

Applications
• Intel® Processors Voltage Regulator: VRM9 and VRD10
• Low Output Voltage, HIGH Current DC-DC Converters
• Voltage Regulator Modules

Part Name(s) : RC5061 RC5061M RC5061MT Fairchild
Fairchild Semiconductor
Description : HIGH PERFORMANCE PROGRAMMABLE Synchronous DC-DC CONTROLLER for Multi-Voltage Platforms View

Description
The RC5061 is a synchronous mode DC-DC CONTROLLER IC which provides a HIGHly accurate, PROGRAMMABLE set of output voltages for multi-voltage platforms such as the Intel Camino, and provides a complete solution for the Intel Whitney and other HIGH-PERFORMANCE processors. The RC5061 features remote voltage sensing, independently adjustable current limit, and Active Droop for optimal converter transient response. The RC5061 uses a 5-bit D/A converter to program the output voltage from 1.3V to 3.5V.

Features
PROGRAMMABLE output for Vcore from 1.3V to 3.5V using an integrated 5-bit DAC
• Controls adjustable linears for Vtt (1.5V), and Vclock (2.5V)
• Meets VRM specification with as few as 5 capacitors
• Meets 1.550V +40/-70mV over initial tolerance, temperature and transients
• Remote sense
• Active Droop (Voltage Positioning)
• Drives N-Channel MOSFETs
• Overcurrent protection using MOSFET sensing
• 85% efficiency typical at full load
• Integrated Power Good and Enable/Soft Start functions
• 20 pin SOIC package

Applications
• Power supply for Pentium® III Camino Platform
• Power supply for Pentium III Whitney Platform
• VRM for Pentium III processor
PROGRAMMABLE multi-output power supply

Part Name(s) : RT8859M RT8859MGQW RT8859MZQW Richtek
Richtek Technology
Description : MULTI-PHASE PWM CONTROLLER for CPU Core Power Supply View

General Description
The RT8859M is a VR12/IMVP7 compliant CPU power CONTROLLER which includes two voltage rails : a 4/3/2/1 phase synchronous buck CONTROLLER, the CORE VR, and a single phase buck CONTROLLER, the AXG VR. The RT8859M adopts G-NAVP™ (Green Native AVP), which is Richtek's proprietary topology derived from finite DC gain compensator with current mode control, making it an easy setting PWM CONTROLLER, meeting all Intel CPU requirements of AVP (Active Voltage Positioning).

Features
4/3/2/1 + 1 Phase PWM CONTROLLER
G-NAVP™ Topology
Serial VID Interface
0.5% DAC Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming
Accurate Current Balance
System Thermal Compensated AVP
Diode Emulation Mode at Light Load Condition for
Multiple and Single Phase
Fast Transient Response
VR12 / IMVP7 Compatible Power Management States
VR Ready Indicator
Thermal Throttling
Current Monitor Output
Switching Frequency up to 1MHz per Phase
OVP, UVP, OCP, NVP, UVLO
Slew Rate Setting/Address Flip Function
External No-Load Offset Setting for both Rails
DVID Improvement
Small 56-Lead WQFN Package
RoHS Compliant and Halogen Free

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