LINEAR Manuals (Others)

LINEAR Design Note 497 Manual

This design note introduces the LTC®4365, a unique solution that elegantly and robustly protects sensitive circuits from unpredictably high or negative supply voltages. The LTC4365 blocks positive voltages as high as 60V and negative voltages as low as –40V. Only voltages within the 5V to 36V window can pass through the device. The LTC4365 uses a high voltage window comparator and charge pump to achieve low power, reliable overvoltage and undervoltage protection.

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LINEAR Design Note 496 Manual

This document introduces the LTC®4155 and LTC4156 dual multiplexed-input battery chargers, featuring PowerPath™ control, I2C programmability and USB On-The-Go for systems such as tablet PCs and other high power density applications. The LTC4155’s float voltage (VFLOAT) range is optimized for Li-Ion batteries, while the LTC4156 is optimized for lithium iron phosphate (LiFePO4) batteries, supporting system loads to 4A with up to 3.5A of battery charge current. I2C controls a broad range of functions and USB On-The-Go functionality is controlled directly from the USB connector ID pin.

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LINEAR Design Note 501 Manual

The LT3791 is a 4-switch synchronous buck-boost DC/DC converter that regulates both constant-current and constant-voltage at up to 98.5% efficiency with a single inductor. It can deliver hundreds of watts and features a 60V input and output rating, making it ideal for driving high power LED strings and charging high voltage batteries when both step-up and step-down conversion is needed. It can also be used as a constant-voltage buck-boost regulator with current limiting and monitoring for both input and output.

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LINEAR Design Note 1024 Manual

This document introduces the LTC3890 and LTC3891 step-down DC/DC controllers. These controllers can accept inputs from 4V to 60V and support single and dual battery automotive environments. They can also output 12V 25A. If no galvanic isolation is required between the input and output voltages, the LTC3890 and LTC3891 can replace expensive and bulky transformer-based converters. Compared to transformer-based solutions, the LTC3890 and LTC3891 step-down converters increase efficiency, reduce power loss in the supply lines, simplify layout and significantly reduce the bill of materials.

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LINEAR Design Note 502 Manual

This design note introduces matched resistor networks for precision amplifier applications and describes how to achieve high-precision matched resistor networks using the LT5400 amplifier.

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LINEAR Design Note 1028 Manual

The LTC3838 is a dual output, dual phase buck controller that employs a controlled constant on-time, valley current mode architecture to provide fast load step response, high switching frequency and low duty cycle capability. It accepts a wide input range, 4.5V to 38V, and can produce 0.6V to 5.5V outputs.

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LINEAR Design Note 1027 Manual

This article discusses how to optimize performance by minimizing IM2 nonlinearity and DC offset that reduce the dynamic range of zero-IF receivers, thus offering a viable alternative to an otherwise challenging design.

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LINEAR LTC1064-4 Manual

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LINEAR TECHNOLOGY LTC1430 Manual

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LINEAR TECHNOLOGY LTC1433/LTC1434 Manual

The LTC ®1433/LTC1434 are monolithic pulse width modulated step-down DC/DC converters. By utilizing current mode switching techniques, they provide excellent AC and DC load and line regulation.

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LINEAR TECHNOLOGY LTC3728 3728fc Dual 550kHz 2-Phase Synchronous Step-Down Switching Regulator Manual

LTC3728 is a high-efficiency dual 5V/3.3V step-down converter with ±1% output voltage accuracy.

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LINEAR TECHNOLOGY LTC485Low Power RS485 Interface Transceiver

LTC485 is a low power differential bus/line transceiver designed for multipoint data transmission standard RS485 applications with extended common mode range (12V to –7V). It also meets the requirements of RS422. CMOS design offers significant power savings over its bipolar counterpart without sacrificing ruggedness against overload of ESD damage. The driver and receiver feature three-state outputs, with the driver outputs maintaining high impedance over the entire common mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. The receiver has a fail-safe feature which guarantees a high output state when the inputs are left open. The LTC485 is fully specified over the commercial and extended industrial temperature range.

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LINEAR TECHNOLOGY LTC660 100mA CMOS Voltage Converter Manual

The LTC660 is a monolithic CMOS switched-capacitor voltage converter. It performs supply voltage conversion from positive to negative from an input range of 1.5V to 5.5V, resulting in complementary output voltages of –1.5V to –5.5V. It also performs a doubling at an input voltage range of 2.5V to 5.5V, resulting in a doubled output voltage of 5V to 11V. Only two external capacitors are needed for the charge pump and charge reservoir functions. The converter has an internal oscillator that can be overdriven by an external clock or slowed down when connected to a capacitor. The oscillator runs at a 10kHz frequency when unloaded. A higher frequency outside the audio band can also be obtained if the BOOST pin is tied to V+. The LTC660 contains an internal oscillator, divide-by-two, voltage level shifter and four power MOSFETs. It is suitable for converting 5V to ±5V supplies, inexpensive negative supplies, data acquisition systems, and as a high current upgrade to LTC1044 or LTC7660.

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LINEAR TECHNOLOGY LTC2433 manual

The LTC2433-1 is a 16-bit analog-to-digital converter with micropower, no latency ∆ΣTM technology, single conversion digital filter, etc.

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LINEAR TECHNOLOGY LT6011/LT6012 Manual

LT6011/LT6012 is a low noise, high precision input performance, low power consumption, rail to rail output swing precision operational amplifier. Input offset voltage can be trimmed to less than 60μV. Low drift and excellent long-term stability guarantee high accuracy over temperature and time. The maximum input bias current of 300pA and the minimum voltage gain of 120dB further maintain this precision over operating conditions. LT6011/LT6012 can operate at any power supply voltage from 2.7V to 36V and draw only 135μA of supply current on a 5V supply. The output swings to within 40mV of either supply rail, making the amplifier a good choice for low voltage single supply applications. LT6011/LT6012 are specified at 5V and ±15V supplies and from -40°C to 85°C. LT6011 (dual) is available in SO-8, MS8 and space saving 3mm x 3mm DFN package.

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LINEAR TECHNOLOGY LTC4412 manual

The LTC4412 is a low-loss PowerPathTM controller that replaces traditional low-voltage OR’ing diodes, has minimal external components, automatic switching between DC sources, load sharing, low quiescent current, and is suitable for mobile phones, notebook computers, digital cameras, USB peripherals, UPS and other applications.

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LINEAR TECHNOLOGY LT6700-1/LT6700-2/LT6700-3/ LT6700HV-1/LT6700HV-2/ LT6700HV-3 1 Manual

LT6700-1/LT6700-2/LT6700-3/LT6700HV-1/LT6700HV-2/LT6700HV-3 are low power, low voltage, dual comparators with a 400mV reference in a 6-lead SOT-23 or tiny DFN package. Operating with supplies from 1.4V up to 18V, these devices draw only 6.5μA, making them ideal for low voltage system monitoring. Hysteresis is included in the comparators, easing design requirements to insure stable output operation. The comparators each have one input available externally; the other inputs are connected internally to the reference. The comparator outputs are open collector and the output load can be referred to any voltage up to 18V (36V for LT6700HV), independent of supply voltage. The output stage sinking capability is guaranteed to be greater than 5mA over temperature. The three versions of this part differ by the polarity of the available comparator inputs. The LT6700-1/LT6700HV-1 has one inverting input and one noninverting input, making it suitable for use as a window comparator. The LT6700-2/LT6700HV-2 has two inverting inputs and the LT6700-3/LT6700HV-3 has two noninverting inputs. All versions are offered in commercial, industrial and automotive temperature ranges.

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LINEAR TECHNOLOGY LTC1487 Manual

The LTC1487 is an ultra-low power differential line transceiver designed with high impedance inputs allowing up to 256 transceivers to share a single bus. It meets the requirements of RS485 and RS422. The LTC1487 features output drivers with controlled slew rate, decreasing the EMI radiated from the RS485 lines, and improving signal fidelity with misterminated lines. The CMOS design offers significant power savings without sacrificing ruggedness against overload or ESD damage. Typical quiescent cur- rent is only 80µA while operating and 1µA in shutdown. The driver and receiver feature three-state outputs, with the driver outputs maintaining high impedance over the entire common-mode range. Excessive power dissipation caused by bus contention or faults is prevented by a thermal shutdown circuit which forces the driver outputs into a high impedance state. The receiver has a fail-safe feature which guarantees a high output state when the inputs are left open. I/O pins are protected against multiple ESD strikes of over ±10kV using the Human Body Model. The LTC1487 is fully specified over the commercial tem- perature range and is available in 8-pin DIP and SO packages.

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LINEAR TECHNOLOGY LTC4257 Manual

The LTC4257 is a complete power interface power supply chip designed for IEEE 802.3af PoE systems. It integrates 25k signature resistors, classification current sources, input current limiting with thermal foldback, undervoltage lockout, and power good signaling, all in a single 8-pin package. The chip integrates a high-voltage power MOSFET, which reduces the cost for system designers and saves board space. LTC4257 can directly interface with Linear Technology's various DC/DC converter products to provide an economical power solution for IP phones, wireless access points and other PDs. Linear Technology also provides solutions for PSE applications based on quad network power controllers. LTC4257 is available in 8-pin SO and low profile (3mm x 3mm) DFN packages.

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LINEAR TECHNOLOGY LTC3738 Manual

LTC3738 3738f is a 3-phase step-down switch- ing regulator controller from Linear Technology Corporation. It is mainly used in high-performance notebook computers, servers, desktop computers and workstations. The controller supports 3-phase synchronous step-down switching power supply, and can drive all N-channel external power MOSFET stages. The working frequency is 210kHz to 530kHz.

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