Description
The GM66500 series is 5.0A low-dropout linear voltage regulators that provide a low-voltage, high-current output with a minimum of external components.
The GM66500 series offers extremely low dropout typically 400mV at 5.0A) and low ground current (typically 70mA at 5.0A).
The GM66500 series is ideal for PC add-in cards that need to convert from standard 3.0V to 2.5V and 2.5V to 1.8V, down to new, lower core voltages. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the GM66500 series to provide 2.5V from a supply as low as 3V. The GM66500 series also has fast transient response, for heavy switching applications. The device requires only 47μF of output capacitance to maintain stability and achieve fast transient response.
The GM66500 series is fully protected with overcurrent limiting, thermal shutdown, reversed-battery protection, reversed-lead insertion protection, and reversed-leakage protection.
The GM66501 series offers a TTL-logic-compatible enable pin and an error flag that indicates undervoltage and overcurrent conditions. Offered in a fixed voltages, 1.8V and 2.5V, the GM66500 series comes in the TO-220 and TO-263 packages and is an ideal upgrade to older, NPNbased linear voltage regulators.

Features
*5.0A minimum guaranteed output current
*400mV dropout voltage
-Designed for 3.0V to 2.5V conversion
-Designed for 2.5V to 1.8V conversion
*1% initial accuracy
*Low ground current
*Current limiting and Thermal shutdown
*Reversed-battery and reversed-lead insertion protection
*Reversed-leakage protection
*Fast transient response
*TO-220 and TO-263 packages
*TTL/CMOS compatible enable pin (GM66501 only)
*Error flag output (GM66501 only)
*Ceramic capacitor stable (See Application Information)

Application
*Low Voltage Digital ICs
*LDO linear regulator for PC add-in cards
*High-efficiency linear power supplies
*SMPS post regulator
*Multimedia and PC processor supplies
*Low-voltage microcontrollers
*Strong ARMTM processor supply

GM66500-1.8TA3T, GM66500-2.5TA3T, GM66500-1.8TB3T, GM66500-1.8TA3R

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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 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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GENERAL DESCRIPTION
The AMS2910 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 AMS2910 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 (D PAK) 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

AMS2910CT, AMS2910CM, AMS2910CD



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Description
The S-L2980 series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and a large output current. A shutdown circuit ensures long battery life.
Various types of output capacitors can be used in the S-L2980 series compared with the conventional CMOS voltage regulators. A small ceramic capacitor can also be used.

Features
*Output voltage: 1.5 V to 6.0 V, selectable in 0.1 V steps
*High accuracy output voltage: ±2.0 % accuracy
*Low dropout voltage: 120 mV typ. (at 3.0 V output product, IOUT=50 mA)
*Low current consumption: During operation: 90 μA typ., 140 μA max.
                                       During shutdown: 0.1 μA typ., 1.0 μA max.
*High peak current capability: 150 mA output is possible. (at VIN≥VOUT(S)+1.0 V)
*Built-in shutdown circuit: Ensure long battery life.
*Low ESR capacitor: A 1.0 μF capacitor can be used as the output capacitor.
                              (A 2.2 μF capacitor can be used as the output capacitor for the products
                               whose output voltage is 1.7 V or less.)
*High ripple rejection: 70 dB typ. (at 1.0 kHz)
*Small package: SOT-23-5
*Lead-free products

Applications
*Power supply for battery-powered devices
*Power supply for personal communication devices
*Power supply for home electric/electronic appliances
*Power supply for cellular phones

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DESCRIPTION
The APE8953 is a 3A 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 APE8953 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 APE8953 can be enabled by other power system. Pulling and holding
the EN pin below 0.4V shuts off the output.
The APE8953 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
*Ultra Low Dropout Voltage 250mV at 3A 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

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GENERAL DESCRIPTION
The AMS1587 series of adjustable and fixed voltage regulators are designed to provide 3A output current and to operate down to 1V input-to-output differential. The dropout voltage of the device is guaranteed maximum 1.3V 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 AMS1587 devices are pin compatible with older three-terminal regulators and are offered in 3 lead TO-220 package, 3 and 2 lead TO-263 (Plastic DD) and TO-252 (D PAK) package.

FEATURES
*Three Terminal Adjustable or Fixed Voltages 1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V
*Output Current of 3A
*Operates Down to 1V Dropout
*Fast Transient response
*Line Regulation: 0.015%
*TO-220, TO-263 and TO-252 packages available

APPLICATIONS
*High Efficiency Linear Regulators
*Post Regulators for Switching Supplies
*Microprocessor Supply
*Battery Chargers
*Constant Current Regulators
*Notebook/Personal Computer Supplies
*Portable Instrumentation

AMS1587CT, AMS1587CT-1.5, AMS1587CT-2.5, AMS1587CT-2.85, AMS1587CT-3.0, AMS1587CT-3.3, AMS1587CT-3.5, AMS1587CT-5.0, AMS1587CM, AMS1587CM-1.5, AMS1587CM-2.5, AMS1587CM-2.85, AMS1587CM-3.0, AMS1587CM-3.3, AMS1587CM-3.5, AMS1587CM-5.0 

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GENERAL DESCRIPTION
TThhee AMS2115 is a single IC controller that drives an external N channel MOSFET as a source follower to produce a fast transient response, low dropout voltage regulator.
The fast transient load performance is obtained by eliminating expensive tantalum or bulk electrolytic output capacitors in the most demanding modern microprocessor applications. Precision-trimmed adjustable and fixed output voltage versions accommodate any required microprocessor power supply voltage.
By selecting the N-channel MOSFET RDS(ON) a very low dropout voltage can be achieved.
A protection feature includes a high side current limit amplifier that activates a circuit to limit the FET gate drive.
A shutdown pin turns off the gate drive and some internal circuits to reduce quiescent current.
AMS2115 is offered in 8L SOIC and 8L PDIP package.

FEATURES
* Fast Transient Response
* Dropout Voltage Defined by FET Used
* Very Tight Load Regulation
* High Side Sense Current Limit

APPLICATIONS
* Microprocessor Supplies
* Video Card Supplies
* Low Voltage Logic Supplies
* GTL Termination

AMS2115P
AMS2115P-1.5
AMS2115P-1.8
AMS2115P-2.5
AMS2115P-3.3
AMS2115P-5.0

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PRODUCT DESCRIPTION
 The ALPHA Semiconductor AS1117 is a low power positive-voltage regulator designed to meet 800mA output current and comply with SCSI-II specifications with a fixed output voltage of 2.85V. This device is an excellent choice for use in battery-powered applications, as active terminators for the SCSI bus, and portable computers.
The AS1117 features very low quiescent current and very low dropout voltage of 1.2V at a full load and lower as output current decreases.
AS1117 is available as an adjustable or fixed 2.85V, 3V, 3.3V, and 5V output voltages.
The AS1117 is offered in a 3-pin surface mount package SOT-223, TO-252, TO-220, SOT-89 & TO-263.
The output capacitor of 10mF or larger is needed for output stability of AS1117 as required by most of the other regulator circuits.
Use of ALPHA Semiconductor’s design, processing and testing techniques make our AS1117 superior over similar products.

FEATURES
* Guaranteed 800mA Output
* Three Terminal Adjustable Or Fixed 1.5V, 2.5V, 2.85V, 3V, 3.3V & 5V
* Very Low Quiescent Current
* Low Dropout Voltage Of 1.2 Volts At Full Load
* Extremely Tight Load And Line Regulation
* Very Low Temperature Coefficient
* Fixed 2.85V Device For SCSI-II Active Terminator
* Logic-Controlled Electronic Shutdown
* Internal Overcurrent Limiting & Thermal Overload Protection
* Surface Mount Package SOT-223, TO-252, TO-220, SOT-89, TO-263, & SO-8

APPLICATIONS
* SCSI-II Active Terminator
* Portable/ Palm Top / Notebook Computers
* Battery Chargers
* Disk Drives
* Portable Consumer Equipment
* Portable Instrumentation
* SMPS Post-Regulator

AS1117U
AS1117U-X

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The S-T111 Series is a positive voltage regulator with a low dropout voltage, high output voltage accuracy, and low current consumption developed based on CMOS technology.
A built-in low on-resistance transistor provides a low dropout voltage and large output current, and a builtin overcurrent protector prevents the load current from exceeding the current capacitance of the output transistor.
An ON/OFF circuit ensures a long battery life.
Compared with the voltage regulators using the conventional CMOS process, a larger variety of capacitors are available, including small ceramic capacitors.
A small SOT-23-5 package realizes highdensity mounting.

Features
• Output voltage: 1.5 V to 5.5 V, selectable in 0.1 V steps.
• High-accuracy output voltage: ±1.0%
• Low dropout voltage: 190 mV typ. (3.0 V output product, IOUT = 100 mA)
• Low current consumption: During operation: 50 μA typ., 90 μA max.
                                        During shutdown: 0.1 μA typ., 1.0 μA max.
• High peak current capability: 150 mA output is possible (at VIN ≥ VOUT(S) + 1.0 V)*1
• Built-in ON/OFF circuit: Ensures long battery life.
• Low ESR capacitor can be used: A ceramic capacitor of 0.1 μF or more can be used for the output capacitor.
• High ripple rejection: 80 dB typ. (at 1.0 kHz)
• Built-in overcurrent protector: Overcurrent of output transistor can be restricted.
• Small package: SOT-23-5
• Lead-free products
*1. Attention should be paid to the power dissipation of the package when the output current is large.

Applications
• Power supply for battery-powered devices
• Power supply for personal communication devices
• Power supply for home electric/electronic appliances
• Power supply for cellular phones

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