National Manuals

LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator

LMV1032 is an audio amplifier series designed for small form factor electret microphones. It is intended to replace the JFET preamp currently used. The LMV1032 series is ideal for applications requiring extended battery life, such as a Bluetooth communication link. The addition of a third pin in electret microphones incorporating the LMV1032 allows for a significant reduction in supply current compared to JFET-equipped electret microphones, reducing microphone supply current to 60µA, ensuring longer battery life. The LMV1032 series is guaranteed for supply voltages from 1.7V to 5V and has fixed voltage gains of 6dB, 15dB, and 25dB. The LMV1032 series offers low output impedance over the voice bandwidth, excellent power supply rejection (PSRR), and temperature stability. The devices are offered in a space-saving 4-bump ultra-thin micro SMD lead-free package, making them ideally suited for the form factor of miniature electret microphone packages.

The ADC104S021 is a low-power, four-channel CMOS 10-bit analog-to-digital converter with a high-speed serial interface. Unlike the conventional practice of specifying performance at a single sample rate only, the ADC104S021 is fully speci- fied over a sample rate range of 50 kSPS to 200 kSPS. The converter is based on a successive-approximation register architecture with an internal track-and-hold circuit. It can be configured to accept up to four input signals at inputs IN1 through IN4. The output serial data is straight binary, and is compatible with several standards, such as SPI™, QSPI™, MICROW- IRE, and many common DSP serial interfaces. The ADC104S021 operates with a single supply, that can range from +2.7V to +5.25V. Normal power consumption using a +3V or +5V supply is 1.94 mW and 6.9 mW, respec- tively. The power-down feature reduces the power consump- tion to just 0.12 µW using a +3V supply, or 0.47 µW using a +5V supply. The ADC104S021 is packaged in a 10-lead MSOP package. Operation over the industrial temperature range of −40˚C to +85˚C is guaranteed.

The LM7171 is a high performance high output current voltage controlled amplifier from National. The chip has a very high conversion rate and a wide unit gain bandwidth, providing 4100V/µs conversion rate and 200MHz unit gain bandwidth while consuming only 6.5mA of supply current. The chip is ideal for video and high speed signal processing applications such as HDSL and pulse amplifiers. With 100mA output current, the LM7171 can be used for video distribution, transformer driver or laser diode driver. Operating on ±15V power supplies allows for large signal swings and provides greater dynamic range and signal-to-noise ratio. The LM7171 offers low SFDR and THD, ideal for ADC/DAC systems. In addition, the LM7171 is specified for ±5V operation for portable applications. The LM7171 is built on National's advanced VIP™ III (Vertically integrated PNP) complementary bipolar process.

lp3996 is a dual low dropout linear regulator with power-on-reset function from national semiconductor company. its maximum output current is 300ma, and output accuracy is 1.5%.

The LM22673 is a 3A single-chip switching power supply chip that integrates a low-dropout linear regulator and a switching power supply controller. It has internal compensation voltage mode control, high stability, wide output voltage range and output current up to 3A.

The LM2743 is a high-speed, N-Channel synchronous buck regulator controller with a 2%, 0.6V feedback reference voltage intended to make down conversion from 3.3V to as low as 0.6V easy.

LM117HV/LM317HV 3-Terminal Adjustable Regulator

The ADC122S101 is a low-power, two-channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface. It supports 500kSPS to 1MSPS sample rate and SPI, QSPI, MICROWIRE and many common DSP serial interfaces.

The LM2591HV SIMPLE SWITCHER® Power Converter 150 kHz 1A Step-Down Voltage Regulator is a 1A step-down switching regulator from TI. It operates at a switching frequency of 150kHz and includes internal frequency compensation, external shutdown and a typical standby current of 90µA.

The LP2981 is a 100 mA, fixed-output voltage regulator designed specifically to meet the requirements of battery-powered applications. It uses an optimized VIP™ (Vertically Integrated PNP) process to deliver unmatched performance in all specifications critical to battery-powered designs: Dropout Voltage. Typically 200 mV @ 100 mA load, and 7 mV @ 1 mA load. Ground Pin Current. Typically 600 µA @ 100 mA load, and 80 µA @ 1 mA load. Sleep Mode. Less than 1 µA quiescent current when ON/OFF pin is pulled low. Smallest Possible Size. SOT-23 and micro SMD packages use an absolute minimum board space. Precision Output. 0.75% tolerance output voltages available (A grade). Eleven voltage options, from 2.5V to 5.0V, are available as standard products.

The LM4890 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800mA. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements. Two external low power resistors set the desired current for Torch and Flash modes. The TX pin allows the device to be forced into Torch mode during a Flash pulse, allowing for synchronization between the RF power amplifier pulse and Flash/Torch modes. To protect the device and Flash LEDs, internal Time-Out circuitry turns off the LM2754 in case of a faulty prolonged Flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up. The LM2754 is available in a small 24-pin thermally enhanced LLP package.

The ADC101S051 is a low-power, single channel CMOS 10-bit analog-to-digital converter with a high-speed serial interface.