National Semiconductor Manuals

The LM5008 is a high voltage (100V) step-down switching regulator that features all of the functions needed to implement a low cost, efficient, Buck bias regulator. It is easy to implement and is provided in the MSOP-8 and the thermally enhanced LLP-8 packages. The regulator is based on a hysteretic control scheme using an ON time inversely proportional to VIN. This feature allows the operating frequency to remain relatively constant. The hysteretic control requires no loop compensation. An intelligent current limit is implemented with forced OFF time, which is inversely proportional to Vout. This scheme ensures short circuit protection while providing min- imum foldback. Other protection features include: Thermal Shutdown, VCC under-voltage lockout, Gate drive under-volt- age lockout, and Max Duty Cycle limiter.

The LM3526 is a dual-port USB power switch and over-current protection, which is compatible with USB1.1 and USB 2.0 standards, and has 1ms fault flag delay, low RON and 500mA minimum continuous load current.

The COP8SG Family ROM and OTP based microcontrollers are highly integrated COP8™ Feature core devices with 8k to 32k memory and advanced features including Analog comparators, and zero external components. These single- chip CMOS devices are suited for more complex applica- tions requiring a full featured controller with larger memory, low EMI, two comparators, and a full-duplex USART.

The 'F240, 'F241, and 'F244 are octal buffers and line drivers designed to be employed as memory and address drivers, clock drivers, and bus-oriented transmitters/receivers, providing improved PC and board density.

This document is an introduction to the TL6512, 5437, DM5437, DM7437 Quad 2-Input NAND Buffers. Each buffer has independent logic NAND functionality.

The LM4860 is a bridge-connected audio power amplifier capable of delivering 1W of continuous average power to an 8Ω load with less than 1% THD+N over the audio spectrum from a 5V power supply.

The LP2985 is a 150 mA, fixed-output voltage regulator designed to provide ultra low dropout and low noise in battery powered applications.

This document introduces the general characteristics of the LME49725 dual high performance, high fidelity audio operational amplifier. The operational amplifier has extremely low distortion, noise and high slew rate, which can meet the most demanding audio application requirements.

LM26LV is a low-voltage, precision, dual-output, low-power temperature switch and temperature sensor. The temperature trip point (TTRIP) can be preset at the factory to any temperature in the range of 0°C to 150°C in 1°C increments. Built-in temperature hysteresis (THYST) keeps the output stable in an environment of temperature instability. In normal operation the LM26LV temperature switch outputs assert when the die temperature exceeds TTRIP. The temper- ature switch outputs will reset when the temperature falls below a temperature equal to (TTRIP − THYST). The OVERTEMP digital output, is active-high with a push-pull structure, while the OVERTEMP digital output, is active-low with an open-drain structure. An analog output, VTEMP, delivers an analog output voltage which is inversely proportional to the measured temperature. Driving the TRIP TEST input high: (1) causes the digital out- puts to be asserted for in-situ verification and, (2) causes the threshold voltage to appear at the VTEMP output pin, which could be used to verify the temperature trip point. The LM26LV's low minimum supply voltage makes it ideal for 1.8 Volt system designs. Its wide operating range, low supply current , and excellent accuracy provide a temperature switch solution for a wide range of commercial and industrial appli- cations.

The ADC124S021 is a low-power, four-channel CMOS 12-bit analog-to-digital converter with a high-speed serial interface. It is fully specified over a sample rate range of 50 ksps to 200 ksps and can accept up to four input signals. The output serial data is straight binary and compatible with several standards such as SPI™, QSPI™, MICROWIRE, and many common DSP serial interfaces. The ADC124S021 operates with a single supply ranging from +2.7V to +5.25V. Normal power consumption is 2.2 mW (+3V supply) or 7.9 mW (+5V supply), and the power-down feature reduces power consumption to 0.14 µW (+3V supply) or 0.32 µW (+5V supply). The ADC124S021 is packaged in a 10-lead MSOP package and operates over the industrial temperature range of -40°C to +85°C.

LM5010A is an enhanced version of LM5010, with the input operating range extended to 6V minimum. It has all the functions needed to implement a low cost, efficient, buck regulator capable of supplying in excess of 1A load current. It integrates an N-Channel Buck Switch and is available in thermally enhanced LLP-10 and TSSOP-14EP packages. It requires no loop compensation resulting in fast load transient response and simplified circuit implementation. It is suitable for applications including non-isolated telecommuication systems, power conversion, and small portable devices.

The LM6588 is a low power, high voltage, rail-to-rail input-output amplifier ideally suited for LCD panel VCOM driver and gamma buffer applications. The LM6588 contains four unity gain stable amplifiers in one package. It provides a common mode input ability of 0.5V beyond the supply rails, as well as an output voltage range that extends to within 50mV of either supply rail. With these capabilities, the LM6588 provides maximum dynamic range at any supply voltage. Operating on supplies ranging from 5V to 16V, while consuming only 750µA per amplifier, the LM6588 has a bandwidth of 24MHz (-3dB). The LM6588 also features fast slewing and settling times, along with a high continuous output capability of 75mA. This output stage is capable of delivering approximately 200mA peak currents in order to charge or discharge capacitive loads. These features are ideal for use in TFT-LCDs. The LM6588 is available in the industry standard 14-pin SO package and in the space-saving 14-pin TSSOP package. The amplifiers are specified for operation over the full -40˚C to +85˚C temperature range.