National Manuals

The LP5550 is a PWI 1.0 compliant Energy Management System for reducing power consumption of stand-alone mobile phone processors such as base-band or applications processors. The LP5550 contains an advanced, digitally controlled switching regulator for supplying variable voltage to processor core and memory. The device also incorporates 3 programmable LDO-regulators for powering I/O, PLLs and maintaining memory retention in shutdown-mode. The device is controlled via the PWI open-standard interface. The LP5550 operates cooperatively with PowerWise technology compatible processors to optimize supply voltages adaptively over process and temperature variations or dynamically using frequency/voltage pre-characterized look-up tables.

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LM10 is a voltage reference and operational amplifier produced by Texas Instruments

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This document introduces the features of the LM1085 series low dropout positive voltage regulators, including adjustable and fixed versions, which can provide 3.3V, 5.0V and 12.0V output voltages, with current limiting and thermal protection.

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The LM1042 is a fluid level detector that uses a thermal-resistive probe technique to measure the level of non-flammable fluids. It provides an output signal proportional to the fluid level and supports single-shot or repeating measurements. The device incorporates all the necessary control circuitry for the thermal-resistive probe, including short and open circuit probe detection. It also features a second linear input for alternative sensor signals.

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The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. It has a wide supply voltage range and a large volume control range, as well as low distortion and high signal-to-noise ratio.

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Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold

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The LM4040 precision micropower shunt voltage reference is ideal for space critical applications. It is available in the sub-miniature SC70 and SOT-23 surface-mount package. The LM4040's advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, thus making the LM4040 easy to use.

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LM40 Hardware Monitor with Dual Thermal Diodes and SensorPath™ Bus

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LP38691/LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors

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LP38691/3-ADJ is a low dropout CMOS linear regulator with adjustable output and stable performance with ceramic output capacitors. It provides a 2.0% precision reference voltage, extremely low dropout voltage (250mV @ 500mA load current, VOUT = 5V), and excellent AC performance. It is suitable for applications such as hard disk drives, notebook computers, battery-powered devices, and portable instrumentation.

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The LP38691/3 low dropout CMOS linear regulators provide tight output tolerance, extremely low dropout voltage, and excellent AC performance utilizing ultra low ESR ceramic output capacitors. The low thermal resistance of the LLP, SOT-223 and T0-252 packages allow the full operating current to be used even in high ambient temperature environments. The use of a PMOS power transistor means that no DC base drive current is required to bias it allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.

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This document introduces the features and characteristics of the LP38690/LP38692 1A low dropout CMOS linear regulators. The product has a typical output tolerance of 2.5%, an extremely low dropout voltage of 450mV at 1A load current, VOUT = 5V, and excellent AC performance using ultra low ESR ceramic output capacitors. The low thermal resistance of the LLP, SOT-223 and T0-252 packages allows the full operating current to be used even in high ambient temperature environments. The use of a PMOS power transistor means that no DC base drive current is required to bias it, allowing ground pin current to remain below 100µA regardless of load current, input voltage, or operating temperature.

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LP3856-ADJ 3A Fast Response Ultra Low Dropout Linear Regulators is a ultra low dropout linear regulator from Linear Technology. It features ultra low dropout, fast response, low quiescent current, etc. It is suitable for various low voltage microprocessor applications.

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The LP3853/LP3856 series of fast ultra low-dropout linear regulators are developed on a CMOS process which allows low quies- cent current operation independent of output load current. This CMOS process also allows the LP3853/LP3856 to op- erate under extremely low dropout conditions.

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LP3852/LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators. These linear regulators operate from a +2.5V to +7.0V input supply and have a wide range of preset output voltage options. They respond very quickly to step changes in load, which makes them suitable for low voltage microprocessor applications.

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LP265-LP365 Micropower Programmable Quad Comparator

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The LP3470 is a micropower CMOS voltage supervisory circuit designed to monitor power supplies in microprocessor (µP) and other digital systems. It provides maximum adjustability for power-on-reset (POR) and supervisory functions. It is available in the following six standard reset threshold voltage (VRTH) options: 2.63V, 2.93V, 3.08V, 4.00V, 4.38V, and 4.63V. If other voltage options between 2.4V and 5.0V are desired, please contact your National Semiconductor representative. The LP3470 asserts a reset signal whenever the VCC supply voltage falls below a reset threshold. The reset time-out period is adjustable using an external capacitor. Reset remains asserted for an interval (programmed by an external capacitor) after VCC has risen above the threshold voltage. The device is available in the tiny SOT23-5 package.

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The LMX2335L/LMX2336L are monolithic, integrated dual frequency synthesizers, including two high frequency prescalers, and are designed for applications requiring two RF phase-lock loops.

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The LMX2306/16/26 are three low power frequency synthesizers. They are used to generate a very stable low noise signal for controlling the local oscillator of an RF transceiver. The three products use different pre-dividers, which are 8/9 and 32/33. The working voltage range of the three products is 2.3V to 5.5V, and they have ultra-low current consumption. At 3V, the typical current consumption of LMX2306 is 1.7mA, LMX2316 is 2.5mA, and LMX2326 is 4.0mA.

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