Description The FAN1654 is a low-cost bi-directional LDO specifically designed for terminating DDR memory bus. It can both sink and source up to 1A continuous, 1.5A peak, providing enough current for most DDR applications. Load regulation meets the JEDEC spec, VTT = (VDDQ/2) ± 40mV.
Features • Sinks and sources 1A continuous, 1.5A peak • -40°C to +125°C Operating Range • Load regulation: (VDDQ/2) ± 40mV • 5mA VREF buffer tracks VTT • On-chip thermal limiting • Power-enhanced eTSSOP™-16 package • Low Current Shutdown Mode • Output Short Circuit Protection
General Description The Micrel MIC37139 is a 1.5A low-dropout linear voltage regulator that provides a low-voltage, high-current output with a minimum of external components. It offers high precision, ultra-low dropout (500mV overtemperature), and low ground current.
Features • 1.5A minimum guaranteed output current • 500mV maximum dropout voltage overtemperature Ideal for 3.0V to 2.5V conversion Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion • Stable with ceramic or tantalum capacitor • Wide input voltage range: VIN: 2.25V to 6.0V • +1.0% initial output tolerance • Fixed 1.8V output voltage • Excellent line and load regulation specifications • Thermal shutdown and current-limit protection • Reverse-leakage protection • Low profile SOT-223 package
Applications • LDO linear regulator for low-voltage digital IC • PC add-in cards • High-efficiency linear power supplies • SMPS post regulator • Battery charger • Set-top boxes • Digital video recorders • PowerPC® power supplies • Multimedia and PC processor supplies
General Description The AME8817 family of positive, linear regulators feature low quiescent current (35µA typ.) with low dropout voltage, making them ideal for battery applications. Output voltages are set at the factory and trimmed to 1.5% accuracy. These rugged devices have both thermal shutdown, and current fold-back to prevent device failure under the "worst" of operating conditions. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and Ground. An additional feature is a "Power Good" detector, which pulls low when the output is out of regulation. The AME8817 is stable with an output capacitance of 4.7µF or greater.
Features ● Very Low Dropout Voltage ● Guaranteed 1.5A Output ● Accurate to within 1.5% ● 35µA Quiescent Current Typically ● Over-Temperature Shutdown ● Current Limiting ● Short Circuit Current Fold-back ● Noise Reduction Bypass Capacitor ● Power Good Output ● Power-Saving Shutdown Mode ● Space-Saving DDPAK-7 Package ● Low Temperature Coefficient
DESCRIPTION The UTC L11815B is a positive, linear regulator. One of its features is the very low quiescent current typically as low as 45μA and the dropout voltage is extremely low. The internal circuit includes thermal shutdown and current fold-back mechanism to prevent device failure when the circuit is operated in the bad conditions. In application, the UTC L11815B needs a low noise and regulated supply. For stability, the output capacitance value should be 4.7μF or more. The UTC L11815B is an ideal for battery applications, such as instrumentations, portable electronics, wireless devices, cordless phones, PC peripherals, and battery powered widgets. The output voltage values are set during manufacturing and their accuracy is trimmed to within 1.5%.
FEATURES * Quiescent Current (45μA typ.) * Accurate :±1.5% * Very Low Dropout Voltage * Guaranteed 1.5A Output * Over-Temperature Shutdown * With Current Limiting * Short Circuit Current Fold-Back * Power-Saving Shutdown Mode * Low Temperature Coefficient * Halogen Free
General Description The RT9009 is a high performance, 2.5A LDO regulator, offering extremely high PSRR and ultra-low dropout. Ideal for portable RF and wireless applications with demanding performance and space requirements.
Features • Ultra Fast Response in Line/Load Transient • < 1μA Shutdown Current • Low Dropout : 520mV at 2A • Wide Operating Voltage Ranges : 2.5V to 5.5V • TTL-Logic-Controlled Shutdown Input • Current Limiting Protection • Thermal Shutdown Protection • Low-ESR Ceramic Output Capacitor Required for Stability • High Power Supply Rejection Ratio • RoHS Compliant and 100% Lead (Pb)-Free
Applications • Game Console • CDMA/GSM Cellular Handsets • Battery-Powered Equipment • Laptop, Palmtops, Notebook Computers • Hand-Held Instruments • Mini PCI & PCI-Express Cards • PCMCIA & New Cards • Portable Information Appliances
Three Terminal Adjustable Low Dropout TO-257/TO-258 Positive Voltage Regulators
These three terminal positive adjustable voltage regulators are designed to provide 7.5A, 5A, 3A, and 1.5A with higher efficiency than conventional voltage regulators. The devices are designed to operate to 1 Volt input to output differential and the dropout voltage is specified as a function of load current.
• Operates Down to 1V Dropout, 1.5V @ Max. Current
• .015% Line Regulation
• .01% Load Regulation
• 1% Reference Voltage
• Hermetic TO-257 and TO-258 Isolated Packages
• Electrically Equivalent to LT1083, 84, 85 and 86
DESCRIPTION The LT ®1963A series are low dropout regulators optimized for fast transient response. The devices are capable of supplying 1.5A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to <1µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it does with many other regulators. In addition to fast transient response, the LT1963A regulators have very low output noise which makes them ideal for sensitive RF supply applications.
FEATURES ■ Optimized for Fast Transient Response ■ Output Current: 1.5A ■ Dropout Voltage: 340mV ■ Low Noise: 40µVRMS (10Hz to 100kHz) ■ 1mA Quiescent Current ■ No Protection Diodes Needed ■ Controlled Quiescent Current in Dropout ■ Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V ■ Adjustable Output from 1.21V to 20V ■ <1µA Quiescent Current in Shutdown ■ Stable with 10µF Output Capacitor* ■ Stable with Ceramic Capacitors* ■ Reverse Battery Protection ■ No Reverse Current ■ Thermal Limiting ■ 5-Lead TO-220, DD, 3-Lead SOT-223 and 8-Lead SO Packages
APPLICATIONS ■ 3.3V to 2.5V Logic Power Supplies ■ Post Regulator for Switching Supplies
General Description The RT8023 combines two low dropout (LDO) linear regulators and a step-down converter with an input voltage range of 2.6V to 5.5V. Each output voltage is adjustable from 0.8V to 5V. With independent Enable and PowerGood pins for each regulator, it is easy to control the power up sequence, which is important in some applications.
Features ● Converter Input Voltage Range : 2.6V to 5.5V, LDO Input Voltage Range : 2.4V to 5.5V ● Low-Noise LDO for RF Application ● Ultra-Fast Response in Line/Load Transient ● LDO Turn-On Time Less Than 40us ● Only 1μF LDO Output Capacitor Required for Stability ● Current Limiting Protection ● 1.5A, High Efficiency Step-Down Converter ● 1.2MHZ Constant Switching Frequency ● Low RDS(ON) Internal Switches ● No Schottky Diode Required ● 0.8V Reference Allows Low Output Voltage ● Low Dropout Operation : 100% Duty Cycle Internally Compensated ● < 2μA Shutdown Current ● Power Good Output Voltage Monitor ● Internal Soft-Start for PWM Converter ● Easy Power Sequence Control ● Over Temperature Protection ● Short Circuit Protection ● Thermally Enhanced 24-Lead WQFN Package ● RoHS Compliant and 100% Lead (Pb)-Free
Applications ● Portable Instruments ● Microprocessors and DSP Core Supplies ● Cellular Phones ● Wireless and DSL Modems ● PC Cards ● Digital Cameras
General Description The Micrel MIC37500/01/02 is a 5A low-dropout linear voltage regulator that provides a low voltage, high current output with a minimum of external components. It offers high precision, ultra low dropout (500mV), and low ground current.
Features • 5A minimum guaranteed output current • 500mV maximum dropout voltage Ideal for 3.0V to 2.5V conversion Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion • Stable with ceramic or tantalum capacitor • Wide Input voltage range: VIN: 2.3V to 6.0V • ±1.0% initial output tolerance • Fixed and adjustable output voltages • Excellent line and load regulation specifications • Logic controlled shutdown • Thermal shutdown and current limit protection • Reverse-leakage protection • Low profile S-Pak package
Applications • LDO linear regulator for low-voltage digital IC • PC add-in cards • High efficiency linear power supplies • SMPS post regulator • Battery charger