The LM/LM and LM integrated cir- cuits are precision V shunt regulator diodes. These monolithic IC voltage references operate as a. LMN, LMN, LMNV Reference Diode products and disclaimers thereto appears at the end of this data sheet. The LM/LM/LM integrated circuits are precision V shunt regulator diodes. These monolithic IC voltage references operate as a low .

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Show Tabs Hide Tabs. The LTC is a V input-capable synchronous buck converter that delivers up to mA of continuous output current. It operates from an input voltage range of 4. The LTC utilises internal synchronous rectification and a programmable peak current-mode design to optimize efficiency over a broad range of output currents. A user-programmable output current limit can dataheet output current from 10mA to mA thereby minimizing the need to oversize external components and protecting high impedance sources.

The LTC can be programmed with fixed output voltages of 1. The combination of its MSOP package with only three tiny externals provides a highly compact solution footprint for a broad range of applications. All pricing is for 1, piece quantities. The Km136 converts input supplies ranging from 4. Multiphase operation reduces input and output ripple as well as the number of input and output capacitors.

National Semiconductor

Applications include point-of-load conversion from 12V or 5V inputs in telecom, industrial, avionics and test equipment. With options for Burst Mode operation for the highest conversion efficiency at light load and pulse-skipping operation for lower output voltage ripple, gives users the option to personalize a circuit’s performance. The LTM permits output voltage tracking for sequencing multiple rails in a system. To protect the load, the LTM features output overvoltage and overcurrent protection.

Spread spectrum frequency modulation reduces EMI emissions, while an internal PMOS switch driver delivers robust short-circuit protection in boost and buck-boost topologies.

Additionally it offers current both input and output current limiting and monitoring for added reliability and design flexibility. A frequency adjust pin permits the user to program the frequency between kHz and 1MHz, optimizing efficiency while minimizing external component size and cost offering a very compact HB LED driver or charger solution.

  ASTM D2241 PDF

For less demanding dimming requirements, the CTRL pin can be used to offer a Its fixed frequency, current mode architecture offers stable operation over a wide range of supply and output voltages. Robust open and short-circuit protection maximize overall system reliability. The LTC is a synchronous buck-boost converter that delivers up to mA of continuous output current from a wide variety of input sources including single or multiple-cell batteries as well as solar panels and supercaps.

The low noise buck-boost topology provides a continuous transition through all of the operating modes, making it ideal for applications that must maintain a constant output voltage, even as the input source voltage transitions through the output voltage. It also includes programmable maximum power point control MPPC capability, ensuring maximum power extraction from non-ideal power sources such as photovoltaic cells.

Quiescent current of only 1. The constant 1MHz switching frequency ensures low noise and high efficiency, while minimizing the size of the external components. Other features include a power good indicator, current-mode control, internal compensation thermal shutdown and output disconnect.

The LTC version offers eight fixed output voltages from 2. The LTC is a high efficiency, 2. It can deliver up to mA of continuous output current from each channel at output voltages as low as 0. The LTC accommodates an input voltage range of 4. Its constant switching frequency of 2. Its peak current mode architecture offers excellent line and load transient response. The two channels run degrees out of phase, minimizing the size of input capacitance.

For applications that require the lowest possible noise, the LTC can be configured to run in pulse-skipping mode, reducing noise and potential RF interference. Additional features include power good voltage monitors, internal compensation, independent soft-start capability for each channel and short-circuit protection. The combination of its thermally enhanced MSOP package and a constant switching frequency up to 3MHz enables the designer to balance printed circuit board solution size with required efficiency.

The electrical specifications are identical to the existing E- and I-grade versions of this device.

This H-grade version is ideal for automotive, industrial and military applications that are subject to high ambient temperatures. The LTC is a high efficiency, 17V input capable synchronous buck regulator that delivers up to 1A of continuous output current to outputs as low as 0. Lm16 constant frequency, current-mode architecture minimizes switching datadheet while offering very fast line and load transient response.


The combination of its 2mm x 3mm DFN or MSOP-8 package high switching frequency and tiny, low cost capacitors and inductors ensures a highly compact solution footprint. This enables automatic correction of voltage errors caused by droop across PCB traces, which is valuable for powering loads such as FPGAs requiring high currents at low pm136.

It is housed in a low height profile 4. With a VIN range of 4. The output voltage can be set with one resistor from 0.

LM136-2.5 PDF Datasheet浏览和下载

Four devices in parallel can deliver 80A of load current. Applications include industrial and medical equipment, and networking and telecom systems. Systems designers value pin compatibility since they can interchange these products without layout changes at any stage from development to production. The LTM features protection functions for overcurrent and overvoltage conditions and the internal temperature of the device can be monitored via an internal temperature sensing diode.

These tiny external capacitors can be used without any necessary series resistance as is common with many other regulators. Internal protection circuitry includes reverse-battery protection, no reverse current, current limiting with foldback, and thermal limiting. For applications requiring large input-to-output differentials, the LT offers a very compact and thermally effective solution. The LTC is a versatile mA high voltage buck-boost charge pump. This device uses switched capacitor fractional conversion to maintain regulation over a wide range of input voltage from 2.

Internal circuitry automatically selects the conversion ratio 2: Low operating current 18?

LM (NSC) PDF技术资料下载 LM 供应信息 IC Datasheet 数据表 (6/12 页)

A with no load, 4? The LTC’s unique constant frequency architecture with reduced switching edge rates provides lower conducted and radiated noise compared to conventional switching regulators. Other IC features include low external parts count with ceramic capacitor stability, soft-start circuitry to prevent excessive current flow during startup, plus short circuit and thermal protection.

The LTC is available in a low-profile fatasheet.