GENERAL DESCRIPTION
The CM2596S series are step-down switching regulators with all required active functions. It is capable of driving 3A load with excellent line and load regulations. These devices are available in fixed output voltages of 3.3V, 5V, and an adjustable output version.
The CM2596S series offers a high-efficiency replacement for popular three-terminal linear regulators. Also it requires a minimum number of external components. It substantially not only reduces the area of board size but also the size of the heat sink, and in some cases no heat sink is required.
±4% tolerance on output voltage within specified input voltages and output load conditions is guaranteed. Also, the oscillator frequency accuracy is within ±15%. External shutdown is included, featuring 150μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

FEATURES
*Guaranteed 3A output current
*3.3V, 5V, and adjustable versions
*Wide input voltage range, up to 40V
*Internal oscillator of 150KHz fixed frequency
*Wide adjustable version output voltage range, from 1.23V to 37V±4% max over line and load conditions
*Low standby current, typ. 150μA, at shutdown mode
*Requires only 4 external components
*Thermal shutdown and current limit protection
*Requires only 4 external components
*Excellent line and load regulation specifications
*TTL shutdown capability

APPLICATIONS
*LCD Monitors
*ADD-ON Cards Switching Regulators
*High Efficiency Step-Down Regulators
*Efficient Pre-regulator for Linear Regulators

CM2596SSCN220, CM2596SZJCN220, CM2596SCN220, CM2596SGSCN220, CM2596SGZJCN220, CM2596SGCN220, CM2596SGCN220B, CM2596SSCN263, CM2596SZJCN263, CM2596SCN263, CM2596SGSCN263, CM2596SGZJCN263, CM2596SGCN263
 

CM2596S - 3A STEP DOWN VOLTAGE REGULATOR

GENERAL DESCRIPTION
The CM2836/B/C family is a positive voltage linear regulator developed utilizing CMOS technology featured low quiescent current (30μA typ.), low dropout voltage, and high output voltage accuracy, making them ideal for battery applications.
EN input connected to CMOS has low bias current. The space-saving SC70 package is attractive for “Pocket” and “Hand Held” applications.
These rugged devices have both Thermal Shutdown, and Current limit to prevent device failure under the “Worst” of operating conditions.
In application requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground.
The CM2836/B/C is stable with a Low ESR output capacitance of 1.0μF or greater.

FEATURES
*Very Low Dropout Voltage
*Low Current Consumption: Typ. 30μA, Max. 35μA
*More Options Output Voltage
*High Accuracy Output Voltage: +/- 2%
*Guaranteed 300mA Output
*Input Range up to 7.0V
*Thermal Shutdown
*Current Limiting
*Stability with Low ESR Capacitors
*Compact Package: SOT-23 / SOT-89 / SC70
*Factory Pre-set Output Voltages
*Low Temperature Coefficient

APPLICATIONS
*Battery-powered devices
*Personal communication devices
*Home electric/electronic appliances
*PC peripherals

CM2836B, CM2836C, CM2836GSIM23, CM2836BGSIM23, CM2836CGSIM23, CM2836GSIM25, CM2836BGSIM25, CM2836CGSIM25, CM2836GSIM89, CM2836BGSIM89, CM2836CGSIM89, CM2836GSIM75, CM2836BGSIM75, CM2836CGSIM75  

CM2836 - 300mA LOW ESR CMOS LDO WITH ENABLE

GENERAL DESCRIPTION
The CM6802 is a green PFC/PWM. It is the new generation of ML4802, ML4841, ML4801 and ML4824-2. Its system clock frequency is generated by the external RT and CT, and then its PWM frequency is 50% of the clock and its PFC frequency is 25% of the clock. CM6802 is designed to be pin-pin compatible with CM6800 family, ML4800 family and ML4824 family. Its PWM (DC to DC section) can be easily configured to Voltage Mode or Current Mode. The green mode function can easily be designed so during the no load condition, its input power can be less than 0.75Watt without shutting off PFC. Its PFC green mode threshold and the PWM green mode threshold can separately set by selecting the proper the RC filter at ISENSE pin (pin3) and CT on RAMP 1 pin (pin 7). Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully compiles with IEC-1000-3-2 specifications. Intended as a BiCMOS version of the industry-standard CM6800, CM6802 includes circuits for the implementation of leading edge, average current, “boost” type power factor correction and a trailing edge, pulse width modulator (PWM). Both PFC and PWM Gate-driver with 0.5A capabilities minimizes the need for external driver circuits. Low power requirements improve
efficiency and reduce component costs.
An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load. The PFC section also includes peak current limiting and input voltage brownout protection. The PWM section can be operated in current or voltage mode, at up to 250kHz, and includes an accurate 50% duty cycle limit to prevent  ransformer saturation.
When RAMP1 is 280KHz, fpfc is 70KHz and fpwm is 140KHz.

FEATURES
*Patent Number #5,565,761, #5,747,977, #5,742,151, #5,804,950, #5,798,635
*fosc=2 x fpwm =4 x fpfc
*No bleed resistor required
*Before the chip wakes up, IAC can start up VCC
*Pin to pin Compatible with CM6800, ML4824 and ML4800 (It needs to modify the values of the external component to work properly).
*User Program PFC automatic green mode threshold (patented)
*User Program PWM automatic green mode threshold (patented)
*Input power less than 0.75Watt without shutting off PFC at no load condition.
*Additional folded-back current limit for PWM section.
*23V Bi-CMOS process
*PWM pulse keeping for the green mode
*VIN OK guaranteed turn on PWM at 2.5V instead of 1.5V
*Internally synchronized leading edge PFC and trailing edge PWM in one IC
*Slew rate enhanced transconductance error amplifier for ultra-fast PFC response
*Low start-up current (30μA typ.)
*Low operating current (3.0mA type.)
*Low total harmonic distortion, high PF
*Reduces ripple current in the storage capacitor between the PFC and PWM sections
*Average current, continuous or discontinuous boost leading edge PFC
*VCC OVP Comparator will turn off both PFC and PWM
*Low Power Detect Comparator
*Tri-Fault detect to meet UL1950
*PWM configurable for current mode or voltage mode operation
*Current fed gain modulator for improved noise immunity
*Brown-out control, over-voltage protection, UVLO, and soft start, and Reference OK

APPLICATIONS
*Desktop PC Power Supply
*Internet Server Power Supply
*IPC Power Supply
*UPS
*Battery Charger
*DC Motor Power Supply
*Monitor Power Supply
*Telecom System Power Supply
*Distributed Power

CM6802IP, CM6802IS  

CM6802 - NO BLEED RESISTOR GREEN MODE PFC/PWM CONTROLLER COMBO

GENERAL DESCRIPTION
The CM6800A is a controller for power factor corrected, switched mode power suppliers.
Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors,
reduces power line loading and stress on the switching FETs, and results in a power supply that fully compiles with IEC-1000-3-2 specifications.
Intended as a BiCMOS version of the industry-standard ML4824, CM6800A includes circuits for the implementation of leading edge, average current, “boost” type power factor correction and a
trailing edge, pulse width modulator (PWM).
Gate-driver with 1A capabilities minimizes the need for external driver circuits.
Low power requirements improve efficiency and reduce component costs.
An over-voltage comparator shuts down the PFC section in the event of a sudden decrease in load.
The PFC section also includes peak current limiting and input voltage brownout protection.
The PWM section can be operated in current or voltage mode, at up to 250kHz, and includes an
accurate 50% duty cycle limit to prevent transformer saturation.
CM6800A includes an additional folded-back current limit for PWM section to provide short circuit protection function.

FEATURES
* Patent Number #5,565,761, #5,747,977, #5,742,151, #5,804,950, #5,798,635
* Pin to pin compatible with ML4800 and FAN6800
* Additional folded-back current limit for PWM section.
* 23V Bi-CMOS process
* VIN OK turn on PWM at 2.25V instead of 1.5V(ML4800).
* Internally synchronized leading edge PFC and trailing edge PWM in one IC
* Slew rate enhanced transconductance error amplifier for ultra-fast PFC response
* Low start-up current (100 μ A typ.)
* Low operating current (3.0mA type.)
* Low total harmonic distortion, high PF
* Reduces ripple current in the storage capacitor between the PFC and PWM sections
* Average current, continuous or discontinuous boost leading edge PFC
* VCC OVP Comparator, Low Power Detect Comparator
* PWM configurable for current mode or voltage mode operation
* Current fed gain modulator for improved noise immunity
* Brown-out control, over-voltage protection, UVLO, and soft start, and Reference OK

APPLICATIONS
* Desktop PC Power Supply
* Internet Server Power Supply
* IPC Power Supply
* UPS
* Battery Charger
* DC Motor Power Supply
* Monitor Power Supply
* Telecom System Power Supply
* Distributed Power

CM6800AGIP
CM6800AGIS
 

CM6800A - LOW START-UP CURRENT PFC/PWM CONTROLLER COMBO

GENERAL DESCRIPTION
The CM8562B is a low cost linear regulator designed to provide a desired output voltage or termination voltage for various applications by converting voltage supplies ranging from 1V to 6.0V. The desired output voltage could be programmable by two external voltage divider resistors.
The CM8562B is capable of sourcing or sinking up to 1.8A of current while regulating an output VOUT voltage to within 2%(DDR-I) , 3% (DDR-ll) or less.
The CM8562B provides low profile 8-pin SOIC package to save system space.

FEATURES
* Ideal for DDR-l、DDR-ll and DDR-lll
* 8-pin SOIC w/ power pad package, 5-Lead SOT-252 package
* 2 ways to adjust the output, VOUT with VFB pin
* Source and sink up to 1.8A , no heat sink required
* Integrated power MOSFETs
* Programmable output voltage by external resistors
* Output voltage could go down to 0.6V
* Iccq at VCCA less than 500uA
* Current limit protection and Short Circuit protection
* Thermal shutdown protection
* Shutdown for standby or suspend mode operation
* Minimum external components

APPLICATIONS
* Mother Board
* PCI/AGP Graphics
* Game/ Play Station
* Set Top Box
* IPC
* SCSI-III Bus terminator

CM8562BIS
CM8562BIN252
CM8562BGIS
CM8562BGIN252

 

CM8562B - 1.8A SINK & SOURCE ADJUSTABLE LINEAR REGULATOR