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Part Name(s) : APU3048 APU3048M APU3048O U3048 U3048M U3048O A-POWER
Advanced Power Electronics Corp
Description : DUAL SYNCHRONOUS PWM controller CIRCUITRY AND LDO controller View

DESCRIPTION

The APU3048 IC combines a Dual synchronous Buck controller and a linear regulator controller, providing a cost-effective, high performance and flexible solution for multi-output applICations. The Dual synchronous controller is configured as 2-independent PWM controller.

APU3048 provides a separate adjustable output by driving a switch as a linear regulator.



FEATURES

Dual Synchronous controller in 16-Pin Package with 1808 out-of-phase operation

LDO controller with 40mA drive

Configured as 2-Independent PWM controller

Flexible, Same or Separate Supply Operation

Operation from 4V to 25V Input

Internal 200KHz Oscillator

Soft-Start controls all outputs

Fixed Frequency Voltage Mode

500mA Peak Output Drive Capability

Programmable Outputs

RoHS Compliant



APPLICATIONS

DDR Memory Source Sink Vtt ApplICation

GraphIC Card

Hard Disk Drive

Power supplies requiring multiple outputs



 


Part Name(s) : RT9228CS Richtek
Richtek Technology
Description : Advanced PWM and Dual Linear Power controller View

General Description

The RT9228 is a 3-in-one power controller optimized for high-performance mICroprocessor and computer applICations. The IC integrates a synchronous buck PWM controller, a linear regulator, and a linear controller as well as monitoring and protection functions into a 24-pin SOP package. The PWM controller regulates the mICroprocessor core voltage. The linear regulator provides power for the clock driver circuit and the linear controller regulates power for the GTL bus.



Features

3-in-one Regulated Voltages for MICroprocessor Core, Clock, and GTL

Compatible with HIP6018B

Power-good Output Voltage Monitor


Part Name(s) : AN-8027 FCP20N60S Fairchild
Fairchild Semiconductor
Description : FAN480X PFC+PWM Combination controller ApplICation View

Introduction
This applICation note describes step-by-step design considerations for a power supply using the FAN480X controller. The FAN480X combines a PFC controller and a PWM controller. The PFC controller employs average current mode control for Continuous Conduction Mode (CCM) boost converter in the front end. The PWM controller can be used in either current mode or voltage mode for the downstream converter. In voltage mode, feed-forward from the PFC output bus can be used to improve the line transient response of PWM stage. In either mode, the PWM stage uses conventional trailingedge duty cycle modulation, while the PFC uses leadingedge modulation. This proprietary leading/trailing-edge modulation technique can signifICantly reduce the ripple current of the PFC output capacitor.

Part Name(s) : US3033 US3033CS Unisem
Unisem
Description : PWM SWITCHER & LINEAR controller IC View

DESCRIPTION
The US3033 IC combines a switching controller and a linear regulator controller all in a compact 8 pin surface mount package, providing a total solution for dual supply processor applICations such as an Intel P55C ™, AMD K6™, as well as Cyrix 6X86L™ and the M2™ processors.
   
FEATURES
■ LDO controller allows the use of a low cost
    pass transistor for the I/O supply
■ 8 pin SOIC combines switching and linear
    controller
■ Internal Pre-regulator Eliminates Cross talk
    between Switching & Linear regulators
■ AutomatIC shut down of the linear regulator
    when connected to the Vcc2 Det pin
■ On board MOSFET driver
■ Fastest transient response of any controller
    method. ( 0 to 100% Duty Cycle in 100 nS )
■ 1% internal voltage reference
■ Internal Under Voltage Lockout protects
    MOSFET during start-up
   
APPLICATIONS
■ Dual supply low voltage processor applICations,
    such as: P55C™,CYRIX M2™, POWER PC™ and
    AMD K6™
■ Simple 5V to 3.3V switcher for Pentium with AGP
    or Pentium II™ applICations
   


Part Name(s) : ML4819 ML4819CP ML4819CS Fairchild
Fairchild Semiconductor
Description : Power Factor and PWM controller “Combo” View

GENERAL DESCRIPTION
The ML4819 is a complete boost mode Power factor controller (PFC) whICh also contains a PWM controller. The PFC circuit is similar to the ML4812 while the PWM controller can be used for current or voltage mode control for a second stage converter. Since the PWM and PFC circuits share the same oscillator, synchronization of the two stages is inherent. The outputs of the controller IC provide high current (>1A peak) and high slew rate to quICkly charge and discharge MOSFET gates. Special care has been taken in the design of the ML4819 to increase system noise immunity.

FEATURES
■ Two 1A peak current totem-pole output drivers
■ Precision buffered 5V reference (±1%)
■ Large oscillator amplitude for better noise immunity
■ Precision duty cycle limit for PWM section
■ Current input gain modulator improves noise immunity
■ Programmable Ramp Compensation circuit
■ Over-Voltage comparator helps prevent output “runaway”
■ Wide common mode range in current sense compensators for better noise immunity
■ Under-Voltage Lockout circuit with 6V hysteresis

Part Name(s) : US3034 US3034CS Unisem
Unisem
Description : 8 PIN PWM SWITCHER controller IC View

DESCRIPTION
The US3034 IC provides an 8 pin low cost switching controller with true short circuit protection all in a compact 8 pin surface mount package, providing a low cost switching solution for dual supply processor applICations that require switching regulator for the 3.3V supply such as the applICations with AGP on board.
   
FEATURES
■ 8 pin SOIC Switching controller with
    HICCUP Current Limiting Reduces Diode
    Power Dissipation to Less than 1% of Normal
    Operation
■ Soft Start Capacitor allows for smooth Output
    Voltage ramp up
■ On board MOSFET driver
■ Fastest transient response of any controller
    method. ( 0 to 100% Duty Cycle in 100 nS )
■ 1% internal voltage reference
■ Internal Under Voltage Lockout protects
    MOSFET during start-up
   
APPLICATIONS
■ Dual supply low voltage processor applICations,
    such as: P55Cä,CYRIX M2ä, POWER PCä and
    AMD K6ä
■ Simple 5V to 3.3V switcher for Pentium with AGP
    or Pentium IIä applICations
   

Part Name(s) : ML4819CP ML4819CS ML4819 Micro-Linear
Micro Linear Corporation
Description : Power Factor and PWM controller “Combo” View

GENERAL DESCRIPTION
The ML4819 is a complete boost mode Power factor controller (PFC) whICh also contains a PWM controller. The PFC circuit is similar to the ML4812 while the PWM controller can be used for current or voltage mode control for a second stage converter. Since the PWM and PFC circuits share the same oscillator, synchronization of the two stages is inherent. The outputs of the controller IC provide high current (>1A peak) and high slew rate to quICkly charge and discharge MOSFET gates. Special care has been taken in the design of the ML4819 to increase system noise immunity.

FEATURES
■ Two 1A peak current totem-pole output drivers
■ Precision buffered 5V reference (±1%)
■ Large oscillator amplitude for better noise immunity
■ Precision duty cycle limit for PWM section
■ Current input gain modulator improves noise immunity
■ Programmable Ramp Compensation circuit
■ Over-Voltage comparator helps prevent output “runaway”
■ Wide common mode range in current sense compensators for better noise immunity
■ Under-Voltage Lockout circuit with 6V hysteresis

Part Name(s) : APU3046 APU3046O A-POWER
Advanced Power Electronics Corp
Description : DUAL SYNCHRONOUS PWM controller WITH CURRENT SHARING CIRCUITRY AND LDO controller View

DESCRIPTION
The APU3046 IC combines a Dual synchronous Buck controller and a linear regulator controller, providing a cost-effective, high performance and flexible solution for multi-output applICations. The Dual synchronous controller can be configured as 2-independent or 2-phase controller. In 2-phase configuration, the APU3046 provides a programmable current sharing whICh is ideal when the output power exceeds any single input power budget.
   
FEATURES
■ Dual Synchronous controller in 24-Pin Package
    with 1808 out-of-phase operation
■ LDO controller with Independent Bias Supply
■ Can be configured as 2-Independent or 2-Phase
    PWM controller
■ Programmable Current Sharing in 2-Phase Configuration
■ Flexible, Same or Separate Supply Operation
■ Operation from 4V to 25V Input
■ Programmable Switching Frequency up to 400KHz
■ Soft-Start controls all outputs
■ Precision Reference Voltage Available
■ 500mA Peak Output Drive Capability
■ Short Circuit Protection for all outputs
■ Power Good Output
■ Synchronizable with External Clock
■ RoHS Compliant
   
APPLICATIONS
■ Dual-Phase Power Supply
■ DDR Memory Source Sink Vtt ApplICation
■ GraphIC Card
■ Hard Disk Drive
■ Power supplies requiring multiple outputs
   

Part Name(s) : LY9523 LY9525 LY9526 LY9527 LY9528 Unspecified1
Unspecified
Description : LY9523 Thru LY9528 / PWM controller IC / DIP 8 PIN View

LY9523, LY9525, LY9526, LY9527, LY9528

Current mode PWM controller with integrated high voltage power MOSFET.

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