General Description
APE1117 is a low dropout positive adjustable or fixed-mode regulator with minimum of 1A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply.
APE1117 is also well suited for other applications such as VGA cards. APE1117 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25 to 5.0 with 6.4V to 12V input supply.

Features
*1.4V maximum dropout at full load current
*Fast transient response
*Output current limiting
*Built-in thermal shutdown
*Packages: SOT223, TO252, SOT89,
*Good noise rejection
*3-Terminal Adjustab le or Fixed 1.5V, 1.8V, 1.9V, 2.5V, 3.3V, 5.0V
*RoHS Complian t

Applications
*PC peripheral
*Communication

APE1117K, APE1117H, APE1117G

DESCRIPTION
The APU1206 family of devices are ultra low dropout 1A regulators using PNP transistor as the pass element. These products are ideal when a single input supply is only available and the dropout voltage is less than 1V, exceeding the minimum dropout characteristics of NPN/PNP hybrid regulators. One common application of these regulators is where input is 3.3V and a 2.5V output is needed.
Besides the low dropout of less than 0.5V, other features of the family of the parts are: micro-power shutdown capability and output UVLO detection where Flag pin is switched low when output is below 5% of its nominal point.

FEATURES
*Low Dropout Voltage (500mV at 1A)
*1% Voltage Reference Accuracy
*Low Ground Current
*1μA Maximum Quiescent Current in Shutdown (APU1207, APU1208)
*Fast Transient Response
*Current Limit and Thermal Shutdown
*Error Flag Signal for Output out of Regulation (APU1207, APU1208)
*RoHS Compliant

APPLICATIONS
*2.5V Supply from 3.3V Input for the new generation of Logic ICs
*Computer Mother Board, Add-On Cards
*High Efficiency Post Regulator in Switch Mode Power Supply (SMPS)

APU1207, APU1208, APU1209, APU1206H-18, APU1206K-18

Description
The GM1431 is a three terminal adjustable shunt regulator with thermal stability guaranteed over temperature. Output voltage can be adjusted to any value between 2.5V (Vref) and 36V by using two external resistors. The GM1431 has a typical dynamic output impedance of 0.2W. Active output circuitry provides a very unique turn on characteristic, making the GM1431 an excellent tum on replacement for zener diodes in many applications such as onboard regulation and adjustable power supplies. The GM1431 is an ideal voltage reference for 3.0 to 3.3V switching power supplies.
The GM1431 shunt regulator is available with 3 voltage tolerances, 0.5%, 1.0% and 2.0% over TA= 0°C to + 70°C, and four package options (SOT-23, TO-92, SOT-89 and SOP-8). Whatever your application is, the GM1431 offers the optimum combination of performance, reliability, and economy.

Features
*Sink Current Capability 1 mA to 100mA
*Low dynamic output impedance, 0.2W typ.
*0.5%, 1% or 2% reference voltage tolerance
*Alternate for TL431, TL431, LM431 & AS431
*Temperature range 0°C to+ 70 °C
*Available in SOT-23, TO-92, SOT-89 and SOP- 8 packages

Application
*Switching power supplies
*Linear regulators
*Adjustable supplies
*Battery-operated computers
*Computer disk drives
*Instrumentation

GM1431AST23R, GM1431BST23R, GM1431CST23R, GM1431AS8T, GM1431AS8R, GM1431BS8T, GM1431BS8R, GM1431CS8T, GM1431CS8R, GM1431AST89R, GM1431BST89R, GM1431CST89R, GM1431AT92B, GM1431BT92B, GM1431CT92B, GM1431AT92RL, GM1431BT92RL, GM1431CT92RL

General Description
The LM20242 is a full featured 1MHz capable synchronous buck regulator capable of delivering up to 2A of load current.
The current mode control loop is externally compensated with only two external components, offering both high performance and ease of use. The device is optimized to work over the input voltage range of 4.5V to 36V making it well suited for high voltage systems.
The device features internal Over Voltage Protection (OVP) and Over Current Protection (OCP) circuits for increased system reliability. A precision Enable pin and integrated UVLO allows the turn on of the device to be tightly controlled and sequenced. Startup inrush currents are limited by both an internally fixed and externally adjustable soft-start circuit. Fault detection and supply sequencing are possible with the integrated PGOOD circuit.
The LM20242 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin. If the output of the LM20242 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.
The LM20242 is offered in an exposed pad 20 pin TSSOP package that can be soldered to the PCB, eliminating the need for bulky heatsinks.

Features
* 2A Output Current, 3.7A peak current
* 130 mΩ/110 mΩ integrated power MOSFETs
* 1.5% output voltage accuracy
* Current Mode Control, selectable compensation
* Resistor programmed, 1MHz capable oscillator
* Synchronous rectifier with diode emulation
* Adjustable output voltage down to 0.8V
* Compatible with pre-biased loads
* Programmable soft-start with external capacitor
* Precision enable pin with hysteresis
* OVP, UVLO inputs and PGOOD output
* Internally protected with peak current limit, thermal shutdown and restart
* Accurate current limit with frequency foldback
* Non-linear current mode slope compensation
* eTSSOP-20 exposed pad package

Applications
* Simple to design, high efficiency point of load regulation from a 4.5V to 36V bus
* High Performance DSPs, FPGAs, ASICs and Microprocessors
* Communications Infrastructure, Automotive

LM20242MH
LM20242MHE
LM20242MHX

General Description
The LM20145 is a full featured adjustable frequency synchronous buck regulator capable of delivering up to 5A of continuous output current. The current mode control loop can be compensated to be stable with virtually any type of output capacitor. For most cases, compensating the device only requires two external components, providing maximum flexibility and ease of use. The device is optimized to work over the input voltage range of 2.95V to 5.5V making it suited for a wide variety of low voltage systems.
The device features internal over voltage protection (OVP) and over current protection (OCP) circuits for increased system reliability. A precision enable pin and integrated UVLO allows the turn-on of the device to be tightly controlled and sequenced. Start-up inrush currents are limited by both an internally fixed and externally adjustable Soft-Start circuit. Fault detection and supply sequencing is possible with the integrated power good circuit.
The LM20145 is designed to work well in multi-rail power supply architectures. The output voltage of the device can be configured to track a higher voltage rail using the SS/TRK pin.
If the output of the LM20145 is pre-biased at startup it will not sink current to pull the output low until the internal soft-start ramp exceeds the voltage at the feedback pin.
The frequency of this device can be adjusted from 250 kHz to 750 kHz by connecting an external resistor from the RT pin to ground.
The LM20145 is offered in a 16-pin eTSSOP package with an exposed pad that can be soldered to the PCB, eliminating the need for bulky heatsinks.

Features
* Input voltage range 2.95V to 5.5V
* Accurate current limit minimizes inductor size
* 97% peak efficiency
* Adjustable switching frequency (250 kHz to 750 kHz)
* 32 mΩ integrated FET switches
* Starts up into pre-biased loads
* Output voltage tracking
* Peak current mode control
* Adjustable output voltage down to 0.8V
* Adjustable Soft-Start with external capacitor
* Precision enable pin with hysteresis
* Integrated OVP, UVLO, power good and thermal shutdown
* eTSSOP-16 exposed pad package

Applications
* Simple to design, high efficiency point of load regulation from a 5V or 3.3V bus
* High Performance DSPs, FPGAs, ASICs and microprocessors
* Broadband, Networking and Optical Communications Infrastructure

LM20145MH
LM20145MHE
LM20145MHX

Features
• 1.4V maximum dropout at full load current
• Built-in thermal shutdown
• Output current limiting
• Adjustable output voltage or fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V
• Fast transient response
• Good noise rejection
• Package : TO252, TO263, TO220
• RoHS Compliant

General Description
APE1085 is a low dropout positive adjustable or fixed-mode regulator with minimum of 3.0A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply.
APE1085 is also well suited for other applications such as VGA cards. APE1085 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25 to 3.3V with 4.7 to 12V input supply.

Functional Description
Introduction
The APE1085 adjustable Low Dropout (LDO) regulator is a 3 terminal device that can easily be programmed with the addition of two external resistors to any voltages within the range of 1.25V to Vin-1.4V. The APE1085 only needs 1.4V differential between Vin and Vout to maintain output regulation. In addition, the output voltage tolerances are also extremely tight and they include the transient response as part of the specification. For example, Intel VRE specification calls for a total of +/- 100mV including initial tolerance, load regulation and 0 to 3.0A load step.

APE1085H18
APE1085S18
APE1085P18

FEATURES
• Adjustable Output Down To 1.2V
• Fixed Output Voltages 1.5V, 2.5V, 3.0V, 3.3V, 5.0V
• Output Current Of 1A
• Low Dropout Voltage 1.2V Typ.
• Extremely Tight Load And Line Regulation
• Current & Thermal Limiting
• Standard 3-Terminal Low Cost TO-220, TO-263, TO-252 & SOT-223

APPLICATIONS
• SCSI-II Active Terminator
• Portable Palmtap/Notebook Computer
• SMPS Post-Regulator
• Disk Drives
• Portable Consumer Equipment
• Portable Instrumentation
• Battery charger

PRODUCT DESCRIPTION
The AS2810 is a low power positive voltage regulator designed to meet 1A output current and comply with SCSI-II specifications with fix output voltage of 2.85V. This device is an excellent choice for use in battery-powered applications and portable computers. The AS2810 features very low quiescent current and very low dropout voltage of 1.2V at a full load and lower as output current decreases.
This product is available as adjustable or fixed 1.5V, 2.5V, 3.0V, 3.3V, and 5V output voltages.
The AS2810 is offered in a 3-pin surface mount packages SOT-223, TO-220, TO-252 & DD package. The output capacitor of 10μF or larger is needed for the output stability of AS2810 as required by most other regulator circuits

AS2810YU-X
AS2810YT-X
AS2810YM3-X
AS2810YR-X

Description
The CYT432 is a low voltage three terminal adjustable shunt regulator with a guaranteed thermal
stability over applicable temperature ranges. The output voltage can be set to any value between VREF (approximately 1.24 V) to 12V with two external resistors.
This device has a typical output impedance of 0.25Ω.
Active output circuitry provides a very sharp turn on characteristic, making this device excellent replacement for Zener diodes in many applications.
The CYT432 is characterized for operation from 0oC to 105oC, and four package options (SOT-23-3, SOT-23-5, TO-92 and SOP-8) allow the designer the opportunity to select the proper package for their applications.

Features
* Low voltage operation (1.24V)
* Adjustable output voltage V0 =VREF to 12V
* Wide operating current range 60μA to 100mA
* Low dynamic output impedance 0.25Ω (Typ.)
* Trimmed bandgap design up to + 0.5%.
* ESD rating is 4KV(Per MIL-STD-883D)
* Available in Lead-Free Packages.

Application
* Linear Regulators
* Adjustable Supplies
* Switching Power Supplies
* Battery Operated Computers
* Instrumentation
* Computer Disk Drives


CYT432W

Features

•Output Voltage Range Adjustable From 1.2 V to 37 V
•Output Current Greater Than 1.5 A
•Internal Short-Circuit Current Limiting
•Thermal Overload Protection
•Output Safe-Area Compensation
•Package Options Include Plastic Small-Outline Transistor SOT-223 (DCY), Flange Mounted (KTE) and Heat-Sink Mounted (KC) Packages

description

The LM317 is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.2 V to 37 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Furthermore, both line and load regulation are better than standard fixed regulators. The LM317 is packaged in the KC (TO-220AB) and KTE packages, which are easy to handle and use.
In addition to having higher performance than fixed regulators, this device includes on-chip current limiting, thermal overload protection, and safe-operating-area protection. All overload
protection remains fully functional, even if the ADJUST terminal is disconnected.
The LM317 is versatile in its applications, including uses in programmable output regulation
and local on-card regulation. Or, by connecting a fixed resistor between the ADJUST and OUTPUT terminals, the LM317 can function as a precision current regulator. An optional output capacitor can be added to improve transient response.
The ADJUST terminal can be bypassed to achieve very high ripple-rejection ratios, which are difficult to achieve with standard three-terminal regulators.
The LM317 is characterized for operation over the virtual junction temperature range of 0°C to
125°C.

LM317DCY LM317KC LM317KTER