GENERAL DESCRIPTION
The AMS2911 series of adjustable and fixed voltage regulators are designed to provide 1A output current and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.5V at maximum output current, decreasing at lower load currents.
On-chip trimming adjusts the reference voltage to 1%. Current limit is also trimmed, minimizing the stress under overload conditions on both the regulator and power source circuitry.
The AMS2911 devices are pin compatible with other three-terminal regulators and are offered in the 3 lead TO-220 package, in the 3Lead TO-263 (Plastic DD), in the TO-252 (DPAK) and in the low profile surface mount SOT-223 package.

FEATURES
*Three Terminal Adjustable or Fixed Voltages* 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, and 5.0V
*Output Current of 1A
*Operates Down to 1V Dropout
*Line Regulation: 0.2% Max.
*Load Regulation: 0.4% Max.
*Available in TO-220, TO-263, TO-252 and SOT-223 packages

APPLICATIONS
*High Efficiency Linear Regulators
*Post Regulators for Switching Supplies
*5V to 3.3V Linear Regulator
*Battery Chargers
*Active SCSI Terminators
*Power Management for Notebook
*Battery Powered Instrumentation

AMS2911CT, AMS2911CM, AMS2911CD

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DESCRIPTION
The CAT6219 is a 500mA CMOS low dropout regulator that provides fast response time during load current and line voltage changes.
The quick-start feature allows the use of an external bypass capacitor to reduce the overall output noise without affecting the turn-on time of just 150μs.
With zero shutdown current and low ground current of 55μA typical, the CAT6219 is ideal for batteryoperated devices with supply voltages from 2.3V to 5.5V. An internal under voltage lockout circuit disables the output at supply voltages under 2.15V typical.
The CAT6219 offers 1% initial accuracy and low dropout voltage, 300mV typical at 500mA. Stable operation is provided with a small value ceramic capacitor, reducing required board space and component cost.
Other features include current limit and thermal protection.
The LDO is available in fixed and adjustable output in the low profile (1mm max height) 5-lead TSOT23 and in the 6-pad 2mm x 2mm TDFN packages.

FEATURES
*Guaranteed 500mA peak output current
*Low dropout voltage of 300mV typical at 500mA
*Stable with ceramic output capacitor
*External 10nF bypass capacitor for low noise
*Quick-start feature
*Under voltage lockout
*No-load ground current of 55μA typical
*Full-load ground current of 85μA typical
*±1.0% initial accuracy (VOUT ≥ 2.0V)
*±2.0% accuracy over temperature (VOUT ≥ 2.0V)
*“Zero” current shutdown mode
*Current limit and thermal protection
*5-lead TSOT-23 and 6-pad TDFN packages

APPLICATIONS
*Cellular phones
*Battery-powered devices
*Consumer Electronics

CAT6219-125TD-GT3, CAT6219-180TD-GT3, CAT6219-250TD-GT3

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General Description
The RT9182 is a dual-channel, low noise, and low dropout regulator supplying up to 200mA current at each channel. The output voltage ranges from 1.5V to 3.3V in 100mV increments and 2% accuracy by operating from a +2.7V to +5.5V input.
The RT9182 uses an internal PMOS as the pass device, which consumes 165uA supply current (both LDOs on) independent of load current and dropout conditions. The EN1 and EN2 pins control each output respectively. When both outputs shutdown simultaneously, the chip will be
turn off and consumes nearly zero operation current which is suitable for battery-power devices. Other features include a current limiting, and over temperature protection.

Features
*Up to 200mA Output Current (Each LDO)
*Dual Shutdown Pins Control Each Output
*124uVRMS Low Noise Output
*Current Limiting and Thermal Protection
*Short Circuit Protection
*120mV Dropout at 100mA Load
*Two LDOs in SOT-23-6 Package
*RoHS Compliant and 100% Lead (Pb)-Free

Applications
*Cellular Phones
*Laptop, Notebook, and Palmtop Computers
*Battery-powered Equipment
*Hand-held Equipment
*Wireless LAN

RT9182APES, RT9182BPES, RT9182CPES

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DESCRIPTION
The UTC UR5596 is a linear bus termination regulator and designed to meet JEDEC SSTL-2(Stub-Series Terminated Logic) specifications for termination of DDR-SDRAM. It also can be used in SSTL-3 or HSTL (High-Speed Transceiver Logic) scheme. The device contains a high-speed OP AMP to provide excellent response to the load transients, and can deliver 1.5A continuous current and transient peaks up to 3A in the application as required for DDR-SDRAM termination.
The UTC UR5596 also incorporates a VSENSE pin to provide superior load regulation and a VREF output as a reference for the chipset and DIMMs. Besides, an active low shutdown (SHDN) pin provides Suspend To RAM (STR) functionality. When SHDN is pulled low the VTT output will tri-state providing a high impedance output, but, VREF will remain active. A power savings advantage can be obtained in this mode through lower quiescent current.
Regarding the output, VTT is capable of sinking and sourcing current while regulating the output voltage equal to VDDQ/2. The output stage has been designed to maintain excellent load
regulation while preventing shoot through. The UTC UR5596 also incorporates two distinct power rails that separates the analog circuitry from the power output stage. This allows a split rail approach to be utilized to decrease internal power dissipation and permits UTC UR5596 to provide a termination solution for DDRII SDRAM.

FEATURES
*Source and sink current
*Low output voltage offset
*No external resistors required
*Linear topology
*Suspend To Ram (STR) functionality
*Low external component count
*Thermal shutdown protection

UR5596-S08-R, UR5596L-S08-R, UR5596-S08-T, UR5596L-S08-T

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GENERAL DESCRIPTION
The XCM406 series is a high current, dual LDO regulator in an ultra small USP-12B01 package which measures just 2.8mm x 2.8mm. The IC is basically two XC6210 high speed CMOS LDOs which are precise, low noise, high current, regulators consisting of a voltage reference, an error amplifier, a current limiter and phase compensation circuit plus a driver transistor. The low ON resistance of the built-in driver transistor means that batteries can be used to a minimal input-output voltage differential and can therefore be used for a longer time. The series can be used with low ESR ceramic capacitors and output voltages are selectable in 0.1V increments within a range of 0.8V to 5.0V per channel. The fold-back current limit circuit also operates as the output current limiter and the output pin protector.
The IC can be placed in stand-by mode via the CE function so that power consumption is greatly reduced.

FEATURES
*Maximum Output Current : ≧700mA (TYP.: 800mA limit) (1.6V<VOUT(T) <5.0V)
*Dropout Voltage : 50mV@lout=100mA
*Operating Voltage Range : 1.5V ~ 6.0V
*Output Voltage Setting Range : 0.8V ~ 5.0V (0.1V increments)
*Accuracy : + 2%
*Low Power Consumption : 35μA (TYP.)
*High Ripple Rejection : 60dB @ 1kHz
*Operating Temperature Range : - 40 OC ~ 85 OC
*Package : USP-12B01

APPLICATIONS
*Mobile phone
*Bluetooth equipment
*Portable AV equipment
*Portable gaming equipment

XCM406AA01DR, XCM406AB01DR
TAG LDO, Regulator

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Description
The SC2620 is a constant frequency dual current-mode switching regulator with integrated 2.3A, 30V switches. Its switching frequency can be programmed up to 1.4MHz per channel. Due to the SC2620’s high frequency operation, small inductors and ceramic capacitors can be used, resulting in very compact power supplies. The two channels of the SC2620 operate at 180° out of phase for reduced input voltage ripples.
Separate soft start/enable pins allow independent control of each channel. Channel 1 power good indicator can be used for output start up sequencing to prevent latch-up.
Current-mode PWM control achieves fast transient response with simple loop compensation. Cycle-by-cycle current limiting and hiccup overload protection reduce power dissipation during overload.

Features
*Wide Input Voltage Range 2.8V to 30V
*Up to 1.4MHz/Channel Programmable Switching Frequency
*Current-mode Control
*Out of Phase Switching Reduces Ripple
*Cycle-by-cycle Current-limiting
*Independent Shutdown/soft-start Pins
*Independent Hiccup Overload Protection
*Channel 1 Power Good Indicator
*Two 2.3A Integrated Switches
*Thermal Shutdown
*Thermally Enhanced SO-16 Lead Free Package
*Fully WEEE and RoHS Compliant

Applications
*XDSL and Cable Modems
*Set-top Boxes
*Point of Load Applications
*CPE Equipment
*DSP Power Supplies

SC2620SETRT, SC2620EVB
TAG Regulator

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General Description
The LM3402/02HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled on-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.

Features
*Integrated 0.5A N-channel MOSFET
*VIN Range from 6V to 42V (LM3402)
*VIN Range from 6V to 75V (LM3402HV)
*500 mA Output Current Over Temperature
*Cycle-by-Cycle Current Limit
*No Control Loop Compensation Required
*Separate PWM Dimming and Low Power Shutdown
*Supports all-ceramic output capacitors and capacitor-less outputs
*Thermal shutdown protection
*MSOP-8, PSOP-8 Packages

Applications
*LED Driver
*Constant Current Source
*Automotive Lighting
*General Illumination
*Industrial Lighting

LM3402MM, LM3402MMX, LM3402HVMM, LM3402HVMMX, LM3402MR, LM3402MRX, LM3402HVMR, LM3402HVMRX

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Outline
This IC is a PWM controlled switching regulator developed using the CMOS process. Low ripple and high efficiency of 83% typ. (MM3005E) are achieved through PWM control. Further, output voltage is high precision output ±2.4%.

Features
*Ultra low consumption current 17.2μA typ. (during operation) (MM3005E)
*High efficiency 83% typ. (MM3005E)
*High precision output voltage ±2.4%
*Wide operating temperature range -30°C~+85°C
*Output voltage 2~5.5V (0.1V can be set in 0.1V steps)

Applications
*Mobile phones, PHS
*Portable MD
*Other battery-operated portable equipment

MM3006, MM3007, MM3008, MM3009, MM3010

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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

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DESCRIPTION
The APE8955 is a 5A ultra low dropout linear regulator. The product is specifically designed to provide well supply voltage for front side bus termination on motherboard and NB applications. The IC needs two supply voltages, a voltage for the circuitry and a main supply voltage for power conversion, to reduce power dissipation and provide extremely low dropout. The APE8955 integrates many functions. A Power-on-Reset(POR) circuit monitors both supply voltage to prevent wrong operations. A thermal shutdown and current limit functions protect the device against thermal and current over-load. A POK indicates the output status with time delay which is set internally. It can control other converter for power sequence. The APE8955
can be enabled by other power system. Pulling and holding the EN pin below 0.4V shuts off the output. The APE8955 is available in ESOP-8 package which features small size as SO-8 and exposed pad to reduce the junction-to-case resistance, being applicable in 2~3W applications.

FEATURES DESCRIPTION
*Ultra Low Dropout Voltage 200mV at 5A Output Current
*Low ESR Output Capacitor (MLCC) Applicable
*0.8V Reference Voltage
*Fast Transient Response
*Current Limit and Thermal Shutdown Protection
*Adjustable Output Voltage by External Resistors
*Power-on-Reset Monitoring on Both VCNTL and VIN Pins
*Under Voltage Protection
*Power OK Output with a Delay Time
*Internal Soft-Start
*SOP-8 with Exposed Pad Package
*RoHS Compliant & Halogen Free

APE8955MP

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